BridgeBio Oncology Therapeutics, Inc. 10-Q

10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-41955 BRIDGEBIO ONCOLOGY THERAPEUTICS, INC. (Exact name of Registrant as specified in its Charter) Delaware 39-3690783 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 256 E. Grand Avenue , Suite 104 South San Francisco , CA 94080 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code: ( 650 ) 405-4770 Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, par value $0.0001 per share BBOT The Nasdaq Global Market Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐ Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). Yes ☒ No ☐ Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer ☐ Accelerated filer ☐ Non-accelerated filer ☒ Smaller reporting company ☒ Emerging growth company ☒ If an emerging growth company, indicate by check mark if the Registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒ As of May 7, 2026, the registrant had 80,107,104 shares of common stock, $0.0001 par value per share, outstanding. Table of Contents Table of Contents Page PART I. FINANCIAL INFORMATION 1 Item 1. Financial Statements (unaudited) 1 Condensed Consolidated Balance Sheets 1 Condensed Consolidated Statements of Operations 2 Condensed Consolidated Statements of Comprehensive Loss 3 Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) 4 Condensed Consolidated Statements of Cash Flows 5 Notes to Condensed Consolidated Financial Statements 6 Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations 26 Item 3. Quantitative and Qualitative Disclosures About Market Risk 36 Item 4. Controls and Procedures 37 PART II. OTHER INFORMATION 38 Item 1. Legal Proceedings 38 Item 1A. Risk Factors 38 Item 2. Unregistered Sales of Equity Securities and Use of Proceeds 98 Item 3. Defaults Upon Senior Securities 98 Item 4. Mine Safety Disclosures 98 Item 5. Other Information 98 Item 6. Exhibits 99 Signatures 100 i Table of Contents PART I—FIN ANCIAL INFORMATION Item 1. Financial Statements. BridgeBio Oncology Therapeutics, Inc. Conde nsed Consolidated Balance Sheets (In thousands, except shares and per share data) March 31, December 31, 2026 2025 (unaudited) Assets Current assets: Cash and cash equivalents $ 52,658 $ 373,687 Short-term marketable securities 199,617 51,773 Receivables from related parties 146 386 Prepaid expenses and other current assets 14,081 6,550 Total current assets 266,502 432,396 Long-term marketable securities 136,617 — Property and equipment, net 938 956 Operating lease right-of-use asset 2,218 2,330 Other non-current assets 11,239 12,567 Restricted cash 132 132 Total assets $ 417,646 $ 448,381 Liabilities, Redeemable Convertible Preferred Stock, and Stockholders’ Equity Current liabilities: Accounts payable $ 12,090 $ 1,374 Accrued compensation and benefits 2,018 5,746 Accrued research and development liabilities 25,920 25,951 Accrued professional services 1,433 674 Payables to related parties 716 534 Operating lease liability, current 538 522 Other accrued liabilities 545 240 Total current liabilities 43,260 35,041 Operating lease liability, noncurrent 2,106 2,244 Total liabilities 45,366 37,285 Commitments and contingencies (Note 7) Redeemable convertible preferred stock, $ 0.0001 par value; no shares authorized, issued and outstanding as of March 31, 2026 or December 31, 2025 — — Stockholders’ equity: Preferred stock, $ 0.0001 par value; 10,000,000 shares authorized as of March 31, 2026; no shares issued and outstanding as of March 31, 2026; no shares authorized, issued and outstanding as of December 31, 2025 — — Common stock, $ 0.0001 par value; 500,000,000 shares authorized as of March 31, 2026 and December 31, 2025, respectively; 80,088,931 and 79,991,768 shares issued and outstanding as of March 31, 2026 and December 31, 2025, respectively 8 8 Additional paid-in capital 771,926 767,639 Accumulated deficit ( 398,673 ) ( 356,567 ) Accumulated other comprehensive income ( 981 ) 16 Total stockholders’ equity 372,280 411,096 Total liabilities, redeemable convertible preferred stock, and stockholders’ equity $ 417,646 $ 448,381 The accompanying notes are an integral part of these condensed consolidated financial statements. 1 Table of Contents BridgeBio Oncology Therapeutics, Inc. Condensed Consolidated Statements of Operations (Unaudited) (In thousands, except shares and per share data) Three Months Ended March 31, 2026 2025 (unaudited) Operating expenses: Research and development (1) $ 39,802 $ 20,635 General and administrative (2) 6,377 2,502 Total operating expenses 46,179 23,137 Loss from operations ( 46,179 ) ( 23,137 ) Other income, net: Interest income 3,944 1,809 Income from transition services agreements 223 — Change in fair value of participation right liability — ( 725 ) Other income (expense) ( 94 ) ( 2 ) Total other income, net 4,073 1,082 Net loss $ ( 42,106 ) $ ( 22,055 ) Net loss per share attributable to common stockholders, basic and diluted $ ( 526.11 ) $ ( 54.23 ) Weighted-average number of shares used in computing net loss per share attributable to common stockholders, basic and diluted 80,032 406,723 (1) Research and development expenses include related party amoun ts of $ 142 and $ 264 for the three months ended March 31, 2026 and 2025, respectively. (2) General and administrative expenses include related party amounts of $ 40 and $ 168 for the three months ended March 31, 2026 and 2025, respectively. The accompanying notes are an integral part of these condensed consolidated financial statements. 2 Table of Contents BridgeBio Oncology Therapeutics, Inc. Condensed Consolidated Sta tements of Comprehensive Loss (Unaudited) (In thousands) Three Months Ended March 31, 2026 2025 (unaudited) Comprehensive loss, net of tax: Net loss $ ( 42,106 ) $ ( 22,055 ) Unrealized loss on marketable securities ( 997 ) ( 157 ) Comprehensive loss $ ( 43,103 ) $ ( 22,212 ) The accompanying notes are an integral part of these condensed consolidated financial statements. 3 Table of Contents BridgeBio Oncology Therapeutics, Inc. Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Unaudited) (In thousands, except share data) Redeemable Convertible Preferred Stock Common Stock Additional Accumulated Accumulated Other Comprehensive Total Stockholders’ Shares Amount Shares Amount Paid-In Capital Deficit Income (Deficit) Equity Balance as of December 31, 2024 36,386,702 323,358 28,415 $ — $ 43,538 $ ( 222,523 ) $ 348 $ ( 178,637 ) Conversion of Series B redeemable convertible preferred stock into common stock ( 21,783 ) ( 189 ) 21,783 — 189 — — 189 Stock-based compensation — — — — 627 — — 627 Unrealized loss on marketable securities — — — — — — ( 157 ) ( 157 ) Net loss — — — — — ( 22,055 ) — ( 22,055 ) Balance as of March 31, 2025 36,364,919 $ 323,169 50,198 $ — $ 44,354 $ ( 244,578 ) $ 191 $ ( 200,033 ) Balance as of December 31, 2025 — $ — 79,991,768 $ 8 $ 767,639 $ ( 356,567 ) $ 16 411,096 Exercise of common stock options for cash — — 97,163 — 416 — — 416 Stock-based compensation — — — — 3,871 — — 3,871 Unrealized loss on marketable securities — — — — — — ( 997 ) ( 997 ) Net loss — — — — — ( 42,106 ) — ( 42,106 ) Balance as of March 31, 2026 — $ — 80,088,931 $ 8 $ 771,926 $ ( 398,673 ) $ ( 981 ) $ 372,280 The accompanying notes are an integral part of these condensed consolidated financial statements. 4 Table of Contents BridgeBio Oncology Therapeutics, Inc. Condensed Consolidated Statements of Cash Flows (Unaudited) (In thousands) Three Months Ended March 31, 2026 2025 Operating activities (unaudited) Net loss $ ( 42,106 ) $ ( 22,055 ) Adjustments to reconcile net loss to net cash used in operating activities: Depreciation of property and equipment 74 54 Stock-based compensation 3,871 627 Change in fair value of participation right liability — 725 Net accretion of premiums on marketable securities ( 74 ) ( 408 ) Amortization of right-of-use assets 112 — Changes in operating assets and liabilities: Prepaid expenses and other current assets ( 7,531 ) 251 Other non-current assets 1,329 ( 31 ) Accounts payable 10,685 537 Accrued compensation and benefits ( 3,729 ) ( 1,920 ) Accrued research and development liabilities ( 31 ) 2,341 Accrued professional services 880 219 Operating lease liabilities ( 123 ) — Other accrued liabilities 305 13 Balances due to and from related parties 421 48 Net cash used in operating activities ( 35,917 ) ( 19,599 ) Investing activities Maturities of marketable securities 26,262 39,963 Purchases of marketable securities ( 311,645 ) ( 24,433 ) Purchases of property and equipment ( 24 ) ( 162 ) Net cash (used in) provided by investing activities ( 285,407 ) 15,368 Financing activities Payment of deferred transaction costs ( 121 ) ( 404 ) Exercise of common stock options for cash 416 — Net cash provided by (used in) financing activities 295 ( 404 ) Net decrease in cash, cash equivalents, and restricted cash ( 321,029 ) ( 4,635 ) Cash, cash equivalents, and restricted cash at beginning of period 373,819 30,983 Cash, cash equivalents, and restricted cash at end of period $ 52,790 $ 26,348 Supplemental disclosures of non-cash investing and financing activities: Right-of-use asset recognized in exchange for operating lease liabilities $ — $ 2,706 Deferred de-SPAC transaction costs included in accrued professional services and other accrued liabilities $ — $ 2,493 Unpaid property and equipment included in accounts payable and other accrued liabilities $ 32 $ 55 The accompanying notes are an integral part of these condensed consolidated financial statements. 5 Table of Contents BridgeBio Oncology Therapeutics, Inc. Notes to Con densed Consolidated Financial Statements (Unaudited) 1. Orga nization Descripti on of the Business BridgeBio Oncology Therapeutics, Inc. (“BBOT,” the “Company,” “we,” “our,” or “us”), formerly known as Helix Acquisition Corp. II (“Helix”), is a clinical-stage biopharmaceutical company advancing a next-generation pipeline of novel small molecule therapeutics targeting RAS and Phosphoinositide 3-kinase (“PI3K”) malignancies. BBOT is headquartered in South San Francisco, California. de-SPAC Transaction On February 28, 2025, TheRas Inc. (“Legacy BBOT”), a privately held Delaware corporation, entered into a definitive business combination agreement (“Business Combination Agreement”) with Helix, a publicly traded special purpose acquisition company (“SPAC”) listed on Nasdaq under the ticker symbol “HLXB.” On August 11, 2025 (the “Closing”), Helix II Merger Sub, Inc., a wholly owned subsidiary of Helix, merged with and into Legacy BBOT, with Legacy BBOT surviving the merger as a wholly-owned subsidiary of Helix (“Merger”). In connection with the Merger, Helix changed its name to BridgeBio Oncology Therapeutics, Inc., and the combined company became listed on Nasdaq under the new ticker symbol “BBOT” (“de-SPAC Transaction”). Immediately prior to the closing of the de-SPAC Transaction, Helix issued and sold shares of its common stock to investors in a private placement financing for an aggregate purchase price of $ 260.9 million (“PIPE Financing”). The de-SPAC Transaction was accounted for as a reverse recapitalization with Legacy BBOT being the accounting acquirer, and Helix identified as the acquired company for accounting purposes (see Note 3). Accordingly, prior to the Closing, all historical financial information presented in the condensed consolidated financial statements represents the balances and activity of Legacy BBOT. At the Closing, each outstanding share of Legacy BBOT common stock was exchanged for shares of BBOT common stock based on a ratio of approximately 0.0889 (“Consideration Ratio”). For periods prior to the Closing, the reported share and per share information has been retroactively adjusted to reflect the Consideration Ratio. Material Related Part y Transactions BridgeBio Pharma, Inc. is a commercial-stage biopharmaceutical company founded to discover, create, test, and deliver transformative medicines to treat patients who suffer from genetic diseases. BridgeBio Pharma, Inc. and its controlled entities (collectively, “BridgeBio Pharma”) were related parties of Legacy BBOT prior to the Closing and remained related parties of the Company after the Closing. As discussed in Note 12, the Company had material related party transactions with BridgeBio Pharma during the periods presented in these condensed consolidated financial statements. Basis o f Presentation and Principles of Consolidation These condensed consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States (“US GAAP”) for interim financial information. All costs, as well as assets and liabilities directly associated with the Company’s business activity, are included in the condensed consolidated financial statements. In connection with the de-SPAC Transaction, as the successor entity following the Closing, BBOT became the reporting entity and consolidates the balances and activity of Legacy BBOT. The financial information presented in these condensed consolidated financial statements reflects the balances and results of operations of the combined entity post-Merger. Prior to the Closing, all references to BBOT or the Company are related to the balances and activity of Legacy BBOT. All intercompany balances have been eliminated in consolidation. These condensed consolidated financial statements have been prepared on the same basis as the audited annual financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments necessary for the fair presentation of the Company’s financial information. The results for the three months ended March 31, 2026 are not necessarily indicative of results to be expected for the year ending December 31, 2026 or for any other future annual or interim period. 6 Table of Contents From its inception through the issuance of the Series B on April 30, 2024, Legacy BBOT had been majority-owned and controlled by BridgeBio Pharma. Prior to April 30, 2024, the Company operated as part of BridgeBio Pharma. From inception through April 30, 2024, these condensed consolidated financial statements have been derived from BridgeBio Pharma’s historical accounting records and are presented on a carve-out basis. The condensed consolidated statement of operations includes allocations of certain general and administrative expenses to the Company from BridgeBio Pharma. The allocations have been determined on a reasonable basis. The related transactions are discussed further in Note 12. Following the Series B issuance, no individual investor or related party group held a controlling financial interest in the Company, and BBOT has operated independently from BridgeBio Pharma. Subsequent to April 30, 2024 and prior to the de-SPAC Transaction, the financial information included in these condensed consolidated financial statements relates to Legacy BBOT on a standalone basis. Liquid ity Since its inception through March 31, 2026, the Company has incurred net losses. As of March 31, 2026, the Company had an accumulated deficit of $ 398.7 million and incurred net losses of $ 42.1 million and $ 22.1 million during the three months ended March 31, 2026 and March 31, 2025, respectively. As of March 31, 2026, the Company had a balance of cash, cash equivalents, and marketable securities of $ 388.9 million. The Company believes that its existing cash, cash equivalents, and marketable securities will be sufficient to support operations for at least one year from the issuance date of these condensed consolidated financial statements. The Company expects to incur additional losses and negative cash flows for the foreseeable future as it continues its research and development efforts, advances its product candidates through preclinical and clinical development, enhances its approach and programs, expands its product pipeline, seeks regulatory approval, prepares for commercialization, hires additional personnel, protects its intellectual property, operates as a public company, and grows its business. The Company will need to raise additional capital to support its continuing operations and pursue its long-term business plan, including the development and commercialization of its product candidates if approved. Financing activities may include, but are not limited to, public or private equity offerings, debt financings, potential collaborations, licensing agreements, or other sources. Such activities are subject to significant risks and uncertainties. 2. Summary of Signifi cant Accounting Policies The Company’s significant accounting policies are disclosed in the Company’s consolidated financial statements for the year ended December 31, 2025, and related notes. There have been no material changes to the Company’s significant accounting policies as compared to the significant accounting policies described in the Company’s consolidated financial statements for the year ended December 31, 2025 included in the Company's Annual Report on Form 10-K filed with the SEC on March 5, 2026 (the "Form 10-K"). Concentration of Credit R isk and Other Risks and Uncertainties Cash, cash equivalents, marketable securities, and restricted cash are financial instruments that subject us to significant concentrations of credit risk. These financial instruments are held in financial institutions in the United States. At times, the amounts on deposit may exceed federally insured limits. We believe that these financial institutions are financially sound, and, accordingly, minimal credit risk exists with respect to the amounts deposited. The Company has not experienced any credit losses associated with its balances in such accounts through March 31, 2026. We are subject to certain risks and uncertainties, and we believe that changes in any of the following areas could have a material adverse effect on future financial position or results of operations: ability to obtain future financing, regulatory approval and market acceptance of, and reimbursement for, product candidates, performance of third-party contract research organizations and manufacturers upon which we rely, protection of our intellectual property, litigation or claims against us based on intellectual property, patent, product, regulatory, clinical or other factors, and our ability to attract and retain employees necessary to support our growth. We depend on third-party manufacturers to supply products for research and development activities in our programs. Specifically, we rely on and expect to continue relying on a small number of manufacturers to supply our requirements for active pharmaceutical ingredients and formulated drugs related to these programs. A significant interruption in the supply of active pharmaceutical ingredients and formulated drugs could adversely affect these programs. 7 Table of Contents Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, and disclosure of contingent liabilities at the date of the condensed consolidated financial statements, and the reported amounts of expenses during the reporting period. Significant estimates and assumptions made in the accompanying condensed consolidated financial statements include, but are not limited to: • Accruals for research and development activities and contingent clinical, development, regulatory, and sales-based milestone payments in our in-licensing agreements, • The fair value of redeemable convertible preferred stock and common stock prior to the de-SPAC Transaction, • The fair value of share-based awards and participation right liability, • Recoverability of deferred tax assets, • Allocations of operating expenses, and • The determination of the incremental borrowing rate used in lease-related calculations. The Company bases its estimates on historical experience and various other reasonable assumptions. Actual results may differ from those estimates or assumptions. Cash, Cash Equiva lents, and Restricted Cash The Company considers all highly liquid investments purchased with a maturity of three months or less at the date of purchase to be cash equivalents. As of March 31, 2026, cash and cash equivalents consisted of money market funds, commercial paper, and corporate debt securities. As of December 31, 2025, cash and cash equivalents consisted of money market funds and commercial paper. Restricted cash represented security deposits in the form of a letter of credit issued in connection with the Company’s lease agreement. The cash, cash equivalents, and restricted cash balance included the following (in thousands): March 31, December 31, 2026 2025 Cash $ 460 $ 624 Cash equivalents 52,198 373,063 Restricted cash 132 132 Total cash, cash equivalents, and restricted cash $ 52,790 $ 373,819 Marketable Securities The Company generally invests its excess cash in money market funds and investment grade short to intermediate-term fixed income securities. Such investments are included in cash and cash equivalents, short-term marketable securities or long-term marketable securities on the condensed consolidated balance sheets, are considered available-for-sale. The Company classifies investments in securities with remaining maturities of less than one year, or where its intent is to use the investments to fund current operations or to make them available for current operations, as short-term investments. The Company classifies investments in securities with remaining maturities of over one year as long-term investments, unless intended to fund current operations. Our available for-sale securities are carried at fair value with the unrealized gains and losses included in accumulated other comprehensive income as a component of stockholders’ equity until realized. Realized gains and losses are calculated using the specific identification method and recorded as interest income in the condensed consolidated statement of operations. The Company reports the accrued interest receivable as a component of prepaid and other assets on its condensed consolidated balance sheet, which is presented separately from available-for-sale securities. The Company does not measure an allowance for credit losses on accrued interest receivable and instead writes it off if an issuer defaults or is expected to default on payments. 8 Table of Contents For available-for-sale securities in an unrealized loss position, the Company first assesses whether it intends to sell, or if it is more likely than not that it will be required to sell, the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income or loss. For available-for-sale securities that do not meet the above criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Company considers the severity of the impairment, changes in interest rates, market conditions, changes to the underlying credit ratings, and forecasted recovery, among other factors. The credit-related portion of unrealized losses and any subsequent improvements are recorded in interest income through an allowance account. Any impairment that has not been recorded through an allowance for credit losses is included in other comprehensive income or loss. No allowance for credit losses has been recorded as of March 31, 2026 or December 31, 2025. Fair Val ue Measurements Assets and liabilities recorded at fair value on a recurring basis in the balance sheets are categorized based on the level of judgment associated with the inputs used to measure their fair values. Fair value is defined as the exchange price that would be received for an asset or an exit price that would be paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The authoritative guidance on fair value measurements establishes a three-tier fair value hierarchy for disclosure of fair value measurements as follows: • Level 1 - Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date; • Level 2 - Inputs (other than quoted prices included in Level 1) that are either directly or indirectly observable for the asset or liability. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active; and • Level 3 - Unobservable inputs supported by little or no market activity and significant to the fair value of the assets or liabilities. To the extent that the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment we exercise in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Due to their short-term nature, the carrying amounts of cash, cash equivalents, prepaid expenses and other current assets, accounts payable, and other accrued liabilities in the accompanying condensed consolidated balance sheet approximate their fair values. L eases The Company determines if an arrangement contains a lease at inception and the classification of the lease on the commencement date. An arrangement contains a lease if there is an identified asset and if the Company controls the use of the identified asset throughout the period of use. The Company determines whether leases meet the classification criteria of a finance or operating lease considering: (1) whether the lease transfers ownership of the underlying asset to the lessee at the end of the lease term, (2) whether the lease grants the lessee an option to purchase the underlying asset that the lessee is reasonably certain to exercise, (3) whether the lease term is for a major part of the remaining economic life of the underlying asset, (4) whether the present value of the sum of the lease payments and residual value guaranteed by the lessee equals or exceeds substantially all of the fair value of the underlying asset, and (5) whether the underlying asset is of such a specialized nature that it is expected to have no alternative use to the lessor at the end of the lease term. As of March 31, 2026, our lease population consisted primarily of real estate operating leases. Lease right-of-use assets and lease liabilities are recognized at the lease commencement date based on the present value of the future minimum lease payments over the lease term at the commencement date. Right-of-use assets also include any initial direct costs incurred and any lease payments made on or before the lease commencement date, less any lease incentives received. Lease incentives are included in the calculation of lease liability as of the commencement date to the extent it is probable that the Company will utilize them. In determining the present value of its lease liabilities, the Company uses its incremental borrowing rate when the rate implicit in the lease is not readily determinable, based on information available as of the lease commencement date. The Company’s incremental borrowing rate is based on the rate of interest that the Company would have to pay to borrow on a collateralized basis over a similar term, an amount equal to the lease payments in a similar economic environment, and the determination of the rate requires the Company to make certain assumptions and judgments, including on its synthetic credit rating. Leases may include options to extend or early terminate the lease term. If the Company, using judgment, is reasonably certain that an option will be exercised, then the option will be included in the calculation of the lease term. 9 Table of Contents The Company elected to combine lease and non-lease components for office leases, and not to recognize right-of-use assets or lease liabilities for short-term leases. A short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less and does not include an option to purchase the underlying asset that the lessee is reasonably certain to exercise. Lease expense for operating leases is recognized on a straight-line basis over the lease term . Property and Equipment, net Property and equipment are stated at cost, net of accumulated depreciation. Depreciation of property and equipment is calculated using the straight-line method over the asset’s estimated useful life. Our property and equipment consist of purchased software with an estimated useful life of 3 years, lab equipment with an estimated useful life of 5 years and leasehold improvements amortized over the shorter of 5 years or the remaining lease term. Maintenance and repairs that do not improve or extend the life of the assets are expensed when incurred. Depreciation expense for property and equipment was $ 0.1 million for both the three months ended March 31, 2026 and 2025, respectively. Impairment of Long-Lived Assets Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability is measured by comparing the carrying amount of an asset group to the future net undiscounted cash flows the assets are expected to generate. If the carrying amount of an asset group exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset group exceeds the fair value of the asset group. No impairment charges related to long-lived assets have been recorded during the three months ended March 31, 2026 and 2025. Seg ments The Company operates in one operating and reportable segment within the United States, developing oncology therapies through various related development projects. All of the Company’s assets are located in the United States. The single operating segment conclusion is further supported by the Company’s organizational and management structure and other factors. The Company’s chief operating decision-maker is its Chief Executive Officer, who manages operations, allocates resources, and evaluates financial performance using a top-down approach and by setting and reviewing company-wide targets. Subsequent to the completion of the de-SPAC Transaction, during the third fiscal quarter of 2025, the Company changed the segment information regularly provided to the chief operating decision maker to the below aggregated grouping of expense categories, which is the basis on which the chief operating decision-maker assesses segment performance and allocates resources. The prior period information has been recast to reflect this update. The chief operating decision-maker reviews research and development expenses by the following significant categories presented in the table below (in thousands): Three months ended March 31, 2026 2025 Research and development trials and consumables expenses $ 28,848 $ 13,278 Payroll and personnel expenses 9,455 5,561 Facilities and other expenses 1,499 1,796 Total research and development $ 39,802 $ 20,635 Since the Company operates in a single operating and reportable segment represented by the entire entity, significant segment expenses are provided to the chief operating decision-maker using the same basis as presented in the condensed consolidated statements of operations, including the research and development itemization above. Net loss is the key measure of segment profit and loss that the chief operating decision-maker uses to allocate resources, assess performance, monitor expenditures, and conduct a review of budget versus actual analysis. The chief operating decision-maker does not review assets at a different level or category other than the amounts disclosed in the Company’s condensed consolidated balance sheets. Receivables from and Payables to Related Parties Receivables from and payables to related parties represent the amounts due to and from various BridgeBio Pharma entities, which are expected to be settled in cash within 12 months from the reporting date. 10 Table of Contents Prior to April 30, 2024, receivables from related parties represented receivables under the centralized cash management balances used by BridgeBio Pharma for cash management and to finance its operations. These arrangements may not reflect how the Company would have financed its operations had it been a separate, standalone entity during the applicable periods. Changes in related-party receivables arising from cash pooling arrangements are presented as investing activities in the condensed consolidated statements of cash flows. Subsequent to April 30, 2024, receivables from related parties represent amounts due from various BridgeBio Pharma entities for services rendered by the Company under the transition services agreement. Payables to related parties represent the amounts due for various research and development and administrative services performed by BridgeBio Pharma to the Company. Prior to April 30, 2024, none of BridgeBio Pharma’s third-party debt and related interest has been attributed to the Company because the Company is not the legal obligor of the debt, and the borrowings are not specifically identifiable to the Company. Subsequent to April 30, 2024, the Company continued its relationship with various BridgeBio Pharma entities, which remain related parties. While the nature of these interactions shifted from centralized cash management to services provided under the transition services agreement, the resulting receivables and payables reported separately as current assets or liabilities in the condensed consolidated balance sheets. Research and Development Expenses Research and development costs are expensed as incurred. Research and development expenses consist of salaries, benefits, and other personnel-related costs, including stock-based compensation, laboratory supplies, preclinical studies, clinical trials, and related clinical manufacturing costs, costs related to manufacturing preparations, fees paid to other entities to conduct certain research and development activities on our behalf, and allocated facility and other related costs. Non-refundable advance payments for goods or services that will be used or rendered for future research and development activities are deferred and capitalized as prepaid expenses until the related goods are delivered or services are performed. Accrued Research and Development Liabilities We record accruals for estimated costs of research and development activities performed by third-party service providers, including preclinical studies, clinical trials, and contract manufacturing. We record the estimated costs of research and development activities based on the estimated amount of services provided but not yet invoiced and include these costs in accrued research and development liabilities in the condensed consolidated balance sheets and within research and development expenses in the condensed consolidated statements of operations and comprehensive loss. These costs are a significant component of our research and development expenses. Examples of estimated research and development expenses that we accrue include: • Fees paid to contract research organizations (“CROs”) in connection with preclinical and toxicology studies and clinical trials; • Fees paid to investigative sites in connection with clinical trials; • Fees paid to contract manufacturing organizations in connection with the production of product and clinical trial materials; and • Professional service fees for consulting and related services. We base our expense accruals for clinical trials on estimates of services received and efforts expended under contracts with multiple research institutions and CROs that conduct and manage clinical trials on our behalf. The financial terms of these agreements vary from contract to contract and may result in uneven payment flows. Payments under some of these contracts depend on factors such as patient enrollment and the completion of clinical trial milestones. Our service providers generally invoice us monthly in arrears for services performed. In accruing service fees, we estimate the period over which services will be performed and the level of effort to be expended in each period. If we do not identify costs we have already incurred, or if we underestimate or overestimate the level of services performed or the costs of those services, our actual expenses could differ from our estimates. We record advance payments to service providers as prepaid assets. We record accruals for the estimated costs of third-party contract manufacturing activities. The financial terms of these agreements are negotiable, vary from contract to contract, and may result in uneven payment flows to our vendors. Payments under the contracts include upfront payments and milestone payments, which depend on factors such as the completion of certain stages of the manufacturing process. To recognize an expense, we assess whether the production process is sufficiently defined to be the delivery of a good or a service, given that processes and yields are developing and less certain. If we consider the process to be the delivery of a good, we recognize the expense when the drug product is delivered, or we otherwise bear the risk of loss. If we consider the process to be the delivery of a service, we recognize expenses based on our best estimates of the contract manufacturer’s progress through the contract stages. We base our estimates on the best information available at the time. However, additional information may become available to us, enabling us to make a more accurate estimate in future reporting periods. In this event, we may be required to record adjustments to research and development expenses in future reporting periods when the actual level of activity becomes more certain. 11 Table of Contents Any increases or decreases in cost are generally considered to be changes in estimates and will be reflected in research and development expenses in the reporting period identified. General and Administrative Expenses General and administrative expenses represent salaries, benefits, and other personnel-related costs, including stock-based compensation, fair value of common stock issued to BridgeBio Pharma (refer to Note 12), costs related to third-party service providers, and professional and legal fees. Asset Acquisitions The Company measures and recognizes asset acquisitions that are not deemed to be business combinations based on the cost to acquire the assets, which includes transaction costs. Goodwill is not recognized in asset acquisitions. The costs allocated to acquire in-process research and development (“IPR&D”) with no alternative future use are expensed as research and development as of the asset acquisition date. Contingent consideration payments for asset acquisitions include development, regulatory, and sales-based milestone payments due upon the occurrence of a specific event. Contingent payments are recognized when the milestone is met unless the contingent consideration meets the definition of a derivative, in which case the amount becomes part of the cost of the asset acquired. None of the contingent payments represented a derivative through March 31, 2026. Upon recognition of the contingent consideration payment, the amount is expensed as research and development expense if it relates to IPR&D with no alternative future use or capitalized if it relates to a developed product, which is generally when clinical trials have been completed and regulatory approval obtained. Milestone Payments Under In-Licensing Agreements Under our in-licensing agreements, the Company is required to pay development, regulatory, and sales-based milestone payments upon the achievement of certain substantive milestones. We recognize development milestones once they are achieved. Stock-Based Compensation Stock-based compensation is recorded in research and development expenses or general and administrative expenses based on the grantee's function. Stock-based compensation includes expenses related to common stock options granted by the Company. The associated stock-based compensation is generally recognized on a straight-line basis over the requisite service period, which is generally the vesting period. Forfeitures of share -based awards are accounted for as they occur. The fair value of stock options is estimated on the grant date using the Black-Scholes option-pricing model, which requires certain assumptions further discussed below: • Fair Value of Common Stock — Prior to the de-SPAC Transaction, the fair value of the Company’s common stock was determined by the board of directors (“Board”) with input from management and consideration of third-party valuation reports. In the absence of a public trading market, and as a clinical-stage company with no significant revenues, the Company believes that it was appropriate to consider a range of factors to determine the fair market value of the common stock at each grant date. In addition, the Company considered various objective and subjective factors, along with input from the independent third-party valuation firm. The factors included (1) the achievement of the development milestones by the Company; (2) the significant risks associated with the Company’s stage of development; (3) capital market conditions for comparable, privately held, early-stage life science companies; (4) the Company’s available liquidity, financial condition, and results of operations; (5) the sales of the Company’s shares to third parties, such as the Series B financing; and (6) the preferential rights of the redeemable convertible preferred stockholders. Following the de-SPAC Transaction, the Company became a public entity and derives fair value of its common stock from quoted prices on the Nasdaq. • Expected Dividend Yield — The Company has historically paid no dividends and does not anticipate paying dividends in the future. • Expected Equity Volatility — The Company does not have sufficient trading history for its common stock and has computed expected volatility based on the historical volatility of a representative group of public companies with similar characteristics to the Company (e.g., public entities of similar size, complexity, stage of development, and industry focus). The historical volatility is commensurate with the expected term assumption. • Risk-Free Interest Rate — The risk-free interest rate is determined by reference to the U.S. Treasury yield curve in effect at the time of award grant for the expected term of the award. 12 Table of Contents • Expected Term — The Company uses the simplified method to calculate the expected term for options granted to employees as it does not have sufficient historical exercise data to provide a reasonable basis for estimating the expected term. Accrued Milestone Compensation Arrangements Historically we have had performance-based milestone compensation arrangements with certain employees and consultants, whose vesting is contingent upon meeting various regulatory and development milestones, with fixed monetary amounts known at inception that can be settled upon achievement of certain contingent milestones in the form of (1) cash, (2) equity of BridgeBio Pharma, or (3) cash or equity of BridgeBio Pharma or the Company at the issuer’s sole election. No performance milestone awards that may be settled in the Company’s shares or related liabilities were outstanding as of March 31, 2026 or December 31, 2025. For arrangements that involve settlement by cash or equity of BridgeBio Pharma or the Company at their sole election, the Company classifies the milestone compensation arrangements as liability-classified awards when they are assessed as probable of achievement due to the possible fixed monetary settlement outcomes. The arrangements could also result in a settlement with a variable number of shares based on the then-current stock price at the achievement date of each contingent milestone, should we elect to settle in equity. We record accruals for the compensation expense arising from each development milestone when the specific contingent development milestone is probable of achievement, and such accruals are measured at each reporting period. We estimate the probability of achieving such milestones based on the progression and expected outcome of the related clinical programs. We base our estimates on the best available information at that time. However, additional information may become available to us which may allow us to make a more accurate estimate in future periods. In this event, we may be required to record adjustments to milestone compensation expenses in future periods. Any increases or decreases in such expenses are generally considered to be changes in estimates and will be reflected in the reporting period identified. Participation Right Liability The Company’s participation right liability represented the right granted to a third party to potentially participate in future Series B offerings at a fixed price of $ 8.8554 per share. The participation right was a freestanding instrument substantially similar to a written call option on the Series B shares that may be redeemed outside of the Company’s control. As such, the Company classified the participation right as a liability, remeasured at fair value, until its full exercise and settlement, which occurred in April 2025. Changes in the fair value of the participation right liability are presented separately in the condensed consolidated statements of operations during the three months ended March 31, 2025. On the settlement date, in April 2025, the participation right liability was remeasured to the intrinsic value of the shares issued and reclassified to temporary equity. Income Taxes The Company is subject to U.S. federal and state income taxes as a corporation. The Company’s tax provision and the resulting effective tax rate for interim periods is determined based upon its estimated annual effective tax rate adjusted for the effect of discrete items arising in that quarter. There was no provision for income tax for the three months ended March 31, 2026 or 2025. Income taxes are accounted for under the asset-and-liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the carrying amounts of existing assets and liabilities in the condensed consolidated financial statements, their respective tax bases, and net operating loss and tax credit carryforwards. Deferred tax assets and liabilities are determined based on the difference between the carrying amounts under U.S. GAAP and the tax basis of assets and liabilities and are measured using the enacted tax rate expected to apply to taxable income in the years in which the differences are expected to be reversed. Deferred tax assets are reduced by a valuation allowance if it is more likely than not that some portion or all of the deferred tax asset will not be realized. We evaluate our deferred tax assets regularly to determine whether adjustments to the valuation allowance are appropriate due to changes in facts or circumstances, such as changes in expected future pre-tax earnings, tax law, interactions with taxing authorities, and developments in case law. In making this evaluation, we rely on our recent history of pre-tax earnings or losses. Our material assumptions include forecasts of future pre-tax earnings and the nature and timing of future deductions and income represented by deferred tax assets and liabilities, all of which involve judgment. Although we believe our estimates are reasonable, we are required to exercise significant judgment in determining the appropriate valuation allowance for deferred tax assets. 13 Table of Contents We recognize uncertain income tax positions at the largest amount that is more likely than not to be sustained upon audit by the relevant taxing authority. Changes in recognition or measurement are reflected in the period in which judgment occurs. Our policy is to recognize interest and penalties related to the underpayment of income taxes as a component of the provision for income taxes. To date, no interest or penalties have been recorded concerning unrecognized tax benefits. Net Loss per Share Attributable to Common Stockholders Prior to the Closing of the de-SPAC Transaction, the Company applied the two-class method to compute net loss per share, as it had issued redeemable convertible preferred stock that met the definition of participating securities. The two-class method required income available to common shareholders for the period to be allocated between common and participating securities based upon their respective rights to receive dividends as if all income for the period had been distributed. Upon the de-SPAC Transaction, the outstanding redeemable convertible preferred stock was converted into common stock, and the two-class method is no longer applicable. At the Closing, each outstanding share of Legacy BBOT common stock was exchanged for shares of BBOT common stock based on a ratio of approximately 0.0889 (“Consideration Ratio”). For periods prior to the Closing, the reported share and per share information has been retroactively adjusted to reflect the Consideration Ratio (refer to Note 3). Basic net loss per share attributable to common shareholders is computed by dividing the net loss attributable to common shareholders by the weighted average number of common shares outstanding for the period. Diluted net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted average number of common shares outstanding, adjusted for the effect of potentially dilutive common shares, including stock options and other equity-linked instruments. Potentially dilutive common shares are not assumed to be issued if their effect is anti-dilutive. As such, in periods in which the Company reported a net loss, diluted net loss per share attributable to common stockholders was the same as basic net loss per share attributable to common stockholders because the effects of potentially dilutive securities were anti-dilutive. Redeemable Convertible Preferred Stock The Company initially records redeemable convertible preferred stock at fair value on the dates of issuance, less issuance costs. Prior to the de-SPAC Transaction, the preferred stockholders, as a group, controlled the Company’s Board and had the ability to initiate a deemed liquidation event, such as a change in control or transfer of substantially all of the Company’s assets. Upon a deemed liquidation event, the preferred stockholders as a group could cause the redeemable convertible preferred stock to be redeemed for cash and other assets available for distribution. Based on these considerations, the redeemable convertible preferred stock was classified in temporary equity outside of the stockholders’ equity in the accompanying condensed consolidated balance sheets. Subsequent adjustments to the carrying values of the redeemable convertible preferred stock classified in temporary equity are made only if it becomes probable that such liquidation events would occur, causing the shares to become redeemable. No such adjustments were made since the underlying events were not probable while the redeemable convertible preferred stock was outstanding. The Company also evaluated the features of its redeemable convertible preferred stock to determine whether they required bifurcation from the underlying shares by assessing whether they were clearly and closely related to the underlying shares and whether they met the definition of a derivative. The Company concluded that no features of its outstanding redeemable convertible preferred stock required bifurcation and separate accounting. In determining if an extinguishment or modification of changes to the temporary equity-classified preferred stock had occurred, the Company had elected a policy to evaluate if changes added, deleted, or significantly changed a substantive contractual term (e.g., one that was at least reasonably possible of being exercised), or fundamentally changed the nature of the redeemable convertible preferred stock. This evaluation considered both the expected economics and the business purpose of the amendment. Other Comprehensive Income or Loss Other comprehensive income or loss represents the change in the Company’s stockholders’ equity (deficit) from all sources other than investments by or distributions to stockholders. The Company’s other comprehensive income or loss is the result of unrealized gains and losses on marketable securities. Deferred de-SPAC Transaction Costs The Company capitalized certain directly attributable legal, accounting, and other third-party fees associated with the de-SPAC Transaction as deferred transaction costs. Upon Closing of the de-SPAC Transaction, the associated costs capitalized by the Company were recorded to additional paid-in capital as a reduction of the proceeds from the de-SPAC Transaction. 14 Table of Contents Emerging Grow th Company Status The Company operates as an emerging growth company (“EGC”), as defined in the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). Under the JOBS Act, EGCs can delay adopting new or revised accounting standards as of effective dates for private companies. The Company historically operated as part of BridgeBio Pharma and adopted new accounting pronouncements using the same timeline as BridgeBio Pharma. The Company has elected to use this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date that it (i) is no longer an EGC or (ii) affirmatively and irrevocably opts out of the extended transition period provided in the JOBS Act. As a result, these condensed consolidated financial statements may not be comparable to companies that comply with the new or revised accounting pronouncements as of the effective dates for public companies. Recently Adopted Accounting Pronouncements In July 2025, the FASB issued ASU No. 2025-05, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets (“ASU 2025-05”). ASU 2025-05 provides an optional practical expedient for estimating future credit losses based on current conditions as of the balance sheet date and assuming those conditions do not change over the remaining life of the accounts receivable. Entities that elect the practical expedient and, if applicable, make the accounting policy election are required to apply the amendments prospectively. The amendments in ASU 2025-05 were effective for fiscal years beginning after December 15, 2025, including interim periods within those fiscal years. The Company has adopted this guidance effective January 1, 2026 and there was no material impact to the condensed consolidated financial statements and related disclosures. Recently Issued Accou nting Pronouncements In November 2024, the FASB issued ASU No. 2024-03, Income Statement – Reporting Comprehensive Income (Topic 220): Disaggregation of Income Statement Expenses (“ASU 2024-03”), which requires public entities to provide disaggregated disclosures of certain expense captions presented on the face of the income statement into specific categories within the footnotes to the financial statements. ASU 2024-03 is effective for the Company’s annual periods beginning on January 1, 2027, and interim periods beginning on January 1, 2028, with early adoption permitted. The ASU may be applied either on a prospective or retrospective basis. The Company is currently evaluating the impact of adopting this new accounting guidance on its condensed financial statements and related disclosures. In May 2025, the FASB issued Accounting Standards Update No. 2025-03, Business Combinations (Topic 805) and Consolidation (Topic 810): Determining the Accounting Acquirer in the Acquisition of a Variable Interest Entity ( “ASU 2025-03”). ASU 2025-03 changes how companies determine the accounting acquirer in certain business combinations involving variable interest entities. The new guidance requires considering the factors used for other acquisition transactions to assess which party is the accounting acquirer. ASU 2025-03 is effective for the Company’s annual reporting periods beginning on January 1, 2027. Early adoption is permitted. The Company is currently evaluating the impact of adopting this new accounting guidance on its condensed financial statements and related disclosures. In September 2025, the FASB issued ASU 2025-06, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software ("ASU 2025-06") . This standard modernizes the accounting for software costs, including updating guidance on the recognition and measurement of costs incurred in connection with development and implementation activities related to internal-use software. The standard is effective for annual reporting periods beginning after December 15, 2027, including interim reporting periods within those fiscal years. The standard can be adopted retrospectively, prospectively or on a modified prospective basis, and early adoption is permitted as of the beginning of an annual reporting period, provided that the financial statements for that period have not yet been issued or made available for issuance. The Company is currently evaluating the impact of the standard on its condensed financial statements and related disclosures and will determine the appropriate transition method prior to adoption. 3. PIPE Financing a nd de-SPAC Transaction Immediately prior to the de-SPAC Transaction described in Note 1, Helix issued and sold to investors in the PIPE Financing 24,343,711 shares of its common stock for gross proceeds of $ 260.9 million. In connection with the de-SPAC Transaction, Helix redomiciled as a Delaware corporation and de-registered from the Register of Companies in the Cayman Islands, and Legacy BBOT became a wholly-owned subsidiary of Helix. As a result, BBOT, as the combined company, received $ 112.3 million in net proceeds from the Trust account previously held by Helix. The Company incurred total transaction costs of $ 12.4 million consisting of legal, accounting, and other professional fees during the year ended December 31, 2025, all of which has been paid as of March 31, 2026. The Company’s total de-SPAC Transaction costs were recorded to additional paid-in capital as a reduction of the deemed proceeds from the PIPE Financing and the Trust Account. 15 Table of Contents Upon the Closing of the de-SPAC Transaction, the following occurred with respect to the equity of Legacy BBOT: • Each outstanding share of Legacy BBOT redeemable convertible preferred stock issued and outstanding as of the Closing date was converted into Legacy BBOT common stock. • The shares of Legacy BBOT common stock that were issued and outstanding immediately prior to the Closing were cancelled and converted into the right to receive 38,924,563 shares of the Company’s common stock at the Consideration Ratio; • All outstanding and unexercised Legacy BBOT common stock options were converted into an aggregate of 4,078,552 common stock options of the Company with the same terms and conditions, adjusted based on the Consideration Ratio. Immediately after the Closing, the Company’s outstanding common stock included the following components: Shares Legacy BBOT common stock 38,924,563 Helix common stock subject to redemption prior to the Closing 18,400,000 Redemption of Helix common stock ( 7,119,750 ) Helix common stock held by the Sponsor 4,648,186 Common stock of Helix issued in the PIPE Financing 24,343,711 Total common stock issued and outstanding 79,196,710 The de-SPAC Transaction was accounted for as a reverse recapitalization under U.S. GAAP because Legacy BBOT was identified as the accounting acquirer and Helix as the accounting acquiree for financial reporting purposes. Accordingly, these condensed consolidated financial statements of the Company are presented as a continuation of the financial statements of Legacy BBOT. The de-SPAC Transaction is presented as the issuance of common stock by BBOT for the net assets of Helix and proceeds from the PIPE Financing, accompanied by a recapitalization and a change in the reporting entity. The net assets of Helix were recorded at historical cost as of the Closing date, with no goodwill or other intangible assets recognized. Legacy BBOT was determined to be the accounting acquirer based on the following facts and circumstances as of the Closing date: • Legacy BBOT stockholders comprised a relative majority of the voting power of BBOT; • Legacy BBOT stockholders received the ability to influence decisions regarding the election and removal of members of BBOT’s board of directors; • Legacy BBOT stockholders received the right to appoint the majority of the BBOT board of directors; • Legacy BBOT’s operations prior to the de-SPAC Transaction comprised the only ongoing operations of BBOT; • BBOT substantially assumed the Legacy BBOT name; • Legacy BBOT’s headquarters became BBOT’s headquarters; • Legacy BBOT’s senior management comprised the senior management of BBOT; and • Prior to the Closing, Helix did not meet the definition of a business. 16 Table of Contents 4. Fair Value Mea surements and Disclosures The following tables summarize the Company’s assets and liabilities measured at fair value on a recurring basis by level within the valuation hierarchy (in thousands): March 31, 2026 Level 1 Level 2 Level 3 Total Assets: Cash equivalents: Treasury bills $ 11,998 $ — $ — $ 11,998 Money market funds 30,021 — — 30,021 Commercial paper — 2,000 — 2,000 Corporate debt securities 8,179 — 8,179 Total cash equivalents 42,019 10,179 — 52,198 Short-term marketable securities: Treasury bills — 29,808 — 29,808 Commercial paper — 18,019 — 18,019 Corporate debt securities — 144,816 — 144,816 Certificated of deposit — 6,974 — 6,974 Total short-term marketable securities — 199,617 — 199,617 Long-current marketable securities: Treasury bills — 2,924 — 2,924 Corporate debt securities — 133,693 — 133,693 Total long-term marketable securities — 136,617 — 136,617 Total marketable securities — 336,234 — 336,234 Total assets $ 42,019 $ 346,413 $ — $ 388,432 December 31, 2025 Level 1 Level 2 Level 3 Total Assets: Cash equivalents: Money market funds $ 366,348 $ — $ — $ 366,348 Commercial paper — 5,484 — 5,484 Total cash equivalents 366,348 5,484 — 371,832 Short-term marketable securities: Commercial paper — 7,313 — 7,313 Corporate debt securities — 44,460 — 44,460 Total short-term marketable securities — 51,773 — 51,773 Total assets $ 366,348 $ 57,257 $ — $ 423,605 Money market funds and short-term "on-the-run" treasuries in cash equivalents, such as treasury bills, that are highly liquid and actively traded marketable securities that generally transact at a stable $ 1.00 net asset value, representing their estimated fair value. The fair value of these marketable securities is based upon observable market inputs obtained from third-party pricing services. The pricing services use industry-standard valuation models and observable inputs, including reported trades, broker-dealer quotes, bids or offers on the same or similar securities issuer, credit spreads, benchmark securities, prepayment and default projections based on historical data, and other observable inputs. The Company's participation right liability was settled in full in April 2025 and was no longer outstanding as of December 31, 2025. 17 Table of Contents The following tables summarize the amortized cost and fair value of the Company’s cash equivalents and marketable securities by major investment category for the periods indicated (in thousands): March 31, 2026 Amortized Cost Basis Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Short-term marketable securities: Treasury bills $ 29,814 $ — $ ( 6 ) $ 29,808 Commercial paper 18,037 — ( 18 ) 18,019 Corporate debt securities 145,065 1 ( 250 ) 144,816 Certificated of deposit 6,984 — ( 10 ) 6,974 Total short-term marketable securities 199,900 1 ( 284 ) 199,617 Long-term marketable securities: Treasury bills 2,941 — ( 17 ) 2,924 Commercial paper — — — — Corporate debt securities 134,374 4 ( 685 ) 133,693 Certificated of deposit — — — — Total long-term marketable securities 137,315 4 ( 702 ) 136,617 Total marketable securities $ 337,215 $ 5 $ ( 986 ) $ 336,234 December 31, 2025 Amortized Cost Basis Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Short-term marketable securities: Commercial paper $ 7,311 $ 2 $ — $ 7,313 Corporate debt securities 44,446 18 ( 4 ) 44,460 Total short-term marketable securities $ 51,757 $ 20 $ ( 4 ) $ 51,773 There were no unrealized gains or losses on cash equivalents as of March 31, 2026, and December 31, 2025. As of March 31, 2026 and December 31, 2025, some of the Company's marketable securities were in an unrealized loss position. These unrealized losses were attributable to changes in interest rates and geopolitical factors rather than credit deterioration. The Company does not intend to sell securities, and it is not more likely than not that it will be required to sell them before recovery of amortized cost, so these losses were considered temporary. All marketable securities with unrealized losses as of each balance sheet date had been in a loss position for less than twelve months. The Company invests in high-quality short-term and long-term marketable securities, all of which have maturities under three years and no history of credit deterioration. No allowance for credit losses was recorded as of March 31, 2026 and December 31, 2025 . 5. In-Licensing and C ollaboration Agreements From time to time, the Company enters into asset purchase and license agreements with third parties as a purchaser or licensee. These arrangements are generally accounted for as asset acquisitions, as the fair value of the consideration is concentrated in a single identifiable asset or group of similar identifiable assets. Given their stage of development, these assets typically have no alternative future use and are expensed as of the acquisition date. The Regents of the University of California License Agreements In September 2016, the Company entered into a license agreement with Regents of the University of California, San Francisco (“UCSF”) and was granted certain worldwide exclusive licenses to use the licensed compounds (the “UCSF License”). The UCSF License was subsequently amended and terminated in June 2021. However, certain terms survived the termination of the UCSF License. Upon a change of control or an initial public offering, Legacy BBOT was required to make a payment to UCSF (“Indexed Milestone Payment”). The Company believes that no such payment will be due now or in the future. 18 Table of Contents Under the UCSF License, UCSF received a right but not an obligation to purchase up to 10 % of securities in any offering on the same terms as other investors (“Participation Right”), which survived the termination of the UCSF License. Because UCSF was not notified of the Series B financing at the time it was completed in May 2024, the Participation Right was extended through March 29, 2025. As a result, UCSF received the right to purchase up to 2,509,446 shares of the Series B redeemable convertible preferred stock at the original issue price of $ 8.8554 per share. In March 2025, UCSF elected to exercise the Participation Right in full. The Participation Right was settled in full in April 2025 (refer to Note 8) and was no longer outstanding as of December 31, 2025. Leidos Biomedical Research License and C ooperative Research and Development Agreements In March 2017, the Company entered into a cooperative research and development agreement (“Leidos CRADA”) with Leidos Biomedical Research, Inc. (“Leidos”). The Company and Leidos executed subsequent amendments to the Leidos CRADA between January 2018 and September 2025 to clarify the scope and provide for term extensions. In December 2018, the Company and Leidos entered into a license agreement (“Initial Leidos License”), under which the Company was granted certain worldwide exclusive licenses to use the licensed compounds for its drug discovery and development initiatives. The Initial Leidos License was terminated in 2021. The Company and Leidos subsequently entered into three additional license agreements (“Additional Leidos Licenses”), including two related to KRAS G12C inhibitor and PI3Kα breaker compounds that were executed in August 2022, and one related to the PanKRAS inhibitor executed in December 2023. The Leidos CRADA, Initial Leidos License, and Additional Leidos Licenses are referred to as the “Leidos Agreements”. In December 2025, the Company and Leidos executed an amendment to extend the expiration date of the Leidos CRADA by nine months to September 2026. In December 2025, the Company and Leidos amended the Leidos CRADA to introduce an additional $ 1.5 million in contribution funding payments. Under the Additional Leidos Licenses, the Company previously incurred initial upfront fees of $ 1.8 million. The Company is required to pay Leidos annual license maintenance fees of $ 0.5 million, as well as royalties on net sales for such licensed compounds calculated using low single-digit percentages of annual net sales of licensed products. The Company’s obligation to pay royalties continues on a country-by-country basis until the expiration of all licensed patent rights covering licensed products in such country. Leidos is also entitled to receive a low double-digit percentage of the sublicensing income received by the Company. As of March 31, 2026, the Company is obligated to make contingent milestone payments totaling u p to $ 25.9 million upon the achievement of certain clinical and regulatory milestones. As of March 31, 2026 and December 31, 2025, the Company recorded a $ 0.5 million liability for milestones that had been achieved but remained unpaid, which is included in the accrued research and development liabilities in the condensed consolidated balance sheets. The Company recognized research and development expenses of $ 0.7 million and $ 1.0 million for the three months ended March 31, 2026 and 2025, respectively, in connection with the Leidos Agreements. Lawrence Livermore National Security License and Cooperative Research and Development Agreements In May 2018, the Company entered into a cooperative research and development agreement (“LLNS CRADA”) wi th Lawrence Livermore National Security, LLC (“LLNS”) to explore new knowledge therapeutics possibilities to KRAS drug discovery utilizing LLNS’s high-performance computing systems. The Company and LLNS executed subsequent amendments to the LLNS CRADA between December 2019 and November 2025 to clarify the scope and provide for term extensions. In July 2022, the Company entered into an exclusive patent license agreement for KRAS G12C inhibitors and an exclusive patent license agreement for PI3Kα breaker compounds. In December 2024, the Company entered into an exclusive license agreement with LLNS for research and development of a Pan KRAS inhibitor. These three agreements are collectively referred to as the LLNS Agreements. In July 2025, BBOT entered into an exclusive license agreement with LLNS for research and development of Pan KRAS inhibitor for non-oncology indications. In November 2025, the Company and LLNS executed three separate amendments to the existing agreements for Pan KRAS inhibitors, PI3Kα breakers, and KRAS G12C inhibitors. These amendments were made to include new patent applications within the scope of patent rights. In November 2025, the Company and LLNS executed an amendment to extend the LLNS CRADA expiration date by six months to June 2026. In January 2026, the Company and LLNS executed an amendment to extend the LLNS CRADA expiration date another twelve months until June 2027 and included additional estimated funding contributions of $ 5.0 million to be paid by the Company over the remaining term. Upon execution of the LLNS Agreements, the Company paid initial upfront cash fees of $ 0.2 million. In addition, under the terms of the LLNS Agreements, the Company is required to pay LLNS certain annual license maintenance fees of $ 0.1 million and royalties to LLNS on net sales for such licensed compounds. With respect to such royalty obligations, the Company agreed to pay LLNS low single-digit percentage tiered royalties on annual net sales of licensed products, with a minimum royalty requirement ranging between $ 0.1 million and $ 0.5 million, depending on the anniversary of the first commercial sale of the products. The Company’s obligation to pay royalties continues on a country-by-country basis until the expiration of all licensed patent rights covering licensed products in such country. LLNS is also entitled to receive half of the Company's sublicensing income, capped at $ 2.0 million per year for each indication. 19 Table of Contents As of March 31, 2026 , the Company is required to make contingent milestone payments totaling up to $ 21.8 million upon the ac hievement of certain clinical, regulatory, and sales milestones. During the three months ended March 31, 2026, no milestones had been achieved and therefore no liabilities were recorded as of March 31, 2026 on the condensed consolidated balance sheets. The Company recognized research and development expenses of $ 0.3 million for the three months ended March 31, 2025 i n connection with the LLNS Agreements. Research and development expenses for the three months ended March 31, 2026 were immaterial. 6. I ncome from Transition Services Agreements In August 2025, we entered into a transition services agreement (“TSA”) with an unrelated party (“TSA Party”) to provide certain services unrelated to our principal operations, which represent the only performance obligation under this arrangement. For the three months ended March 31, 2026, the Company recorded $ 0.2 millio n in connection with the TSA, which is presented separately as other income from transition services agreements in the condensed consolidated statements of operations. The Company did not record any TSA income for the three months ended March 31, 2025. 7. Commitments and Contingencies Other Research and D evelopment Agreements We may enter into contracts in the normal course of business with contract research organizations for clinical trials, contract manufacturing organizations for clinical supplies, and other vendors for preclinical studies, supplies, and other services and products for operating purposes. These contracts generally provide for termination on notice with potential termination charges. Cash Bonus with Performance Conditions In May 2024, the Company committed to making a $ 3.0 million cash payment to an executive contingent upon the consummation of an equity financing, a change in control transaction, an initial public offering, or a reverse merger with a SPAC. The Company recorded $ 3.0 million performance cash bonus payment to the executive upon closing of the de-SPAC Transaction, which was paid during the three months ended September 30, 2025. There have been no other cash bonuses with performance conditions recorded or paid during the three months ended March 31, 2026. Indemni fication In the ordinary course of business, we may provide indemnifications of varying scope and terms to vendors, lessors, business partners, Board members, officers, and other parties with respect to certain matters, including, but not limited to, losses arising out of breach of such agreements, services to be provided by us, our negligence or willful misconduct, violations of law, or intellectual property infringement claims made by third parties. No material demands have been made upon us to provide indemnification under such agreements, and thus, there are no claims that we are aware of that could have a material effect on our condensed consolidated financial statements. Contin gencies Liabilities for loss contingencies arising from claims, assessments, litigation, fines, penalties, and other sources are recorded when it is probable that a liability has been incurred and the amount can be reasonably estimated. There are no matters currently outstanding for which any liabilities have been accrued. The Company is not currently involved in any legal actions that could have a material effect on the Company’s financial position, results of operations, or liquidity . 8. Redeemable Convertible Prefe rred Stock and Stockholders’ Equity (Deficit) Redeemable Convert ible Preferred Stock In February 2025, one investor elected to voluntarily convert 21,783 shares of the Series B redeemable convertible preferred stock into common stock. In March 2025, UCSF elected to exercise the Participation Right, and the Company settled the Participation Right in full in April 2025 through the issuance of 2,509,446 Series B shares for cash proceeds of $ 22.2 million, and the amount credited to redeemable convertible preferred stock included the settlement date fair value of the participation right liability of $ 3.8 million. In August 2025, the Company’s outstanding redeemable convertible preferred stock was converted into common stock, immediately before the Closing of the de-SPAC Transaction discussed in Note 3, and therefore there were no redeemable convertible preferred stock shares authorized or outstanding as of March 31, 2026 or December 31, 2025. 20 Table of Contents Prior to the August 2025 conversion, the holders of the redeemable convertible preferred stock were entitled to different rights, preferences, privileges, and restrictions regarding voting, dividends, liquidation, conversion, and redemption. Voting Rights Each share of the redeemable convertible preferred stock had voting rights equal to the number of shares of common stock into which it was convertible. The holders of redeemable convertible preferred stock voted together with the holders of common stock as a single class. Dividends The holders of the redeemable convertible preferred stock were entitled to receive noncumulative dividends at an annual rate of 8.0 % of the original issuance price per share of the respective series when declared by the Company’s Board prior and in preference to any dividends on common stock. The holders of the redeemable convertible preferred stock had priority and were entitled to participate in any distributions to the holders of common stock on an as-converted basis. No dividends have been declared or paid by the Company since its inception and through March 31, 2026. Redemption Shares of the redeemable convertible preferred stock were contingently redeemable upon the occurrence of certain change in control events that were outside the Company’s control, including a sale, lease, transfer, or other disposition of all or substantially all of the Company’s assets, merger with a special purpose acquisition company or with a public company (“Deemed Liquidation Event”). The following stockholders group were each required to vote to initiate or waive such redemption: (i) the holders of a majority of the then outstanding shares of the redeemable convertible preferred stock, voting together as a single class on an as-converted into common stock basis (“Requisite Holders”), and (ii) the holders of a majority of the then outstanding shares of the Series B, voting as a separate class (“Requisite Series B Holders”). Subsequent adjustments to the carrying values of the liquidation preferences were only required to be made if it became probable that such a liquidation event would occur. No subsequent measurement adjustments were recorded through August 2025. Liquidation Preference In the event of any liquidation, dissolution, or winding up of the Company, either voluntary or involuntary, and upon a Deemed Liquidation Event, the holders of the redeemable convertible preferred stock were entitled to receive, with equal priority among them, prior and in preference to any distribution of any of the Company’s assets to the holders of common stock, an amount equal to the greater of (a) the original issue price per share of redeemable convertible preferred stock of the respective series then outstanding, plus any declared or accrued but unpaid dividends, or (b) an amount payable on an as-converted into common stock basis. After payment of the preferential amounts to the holders of the redeemable convertible preferred stock, the remaining assets of the Company available for distribution were to be distributed among the holders of common stock in proportion to the number of shares then held. Conversion Rights At the option of the holder, each share of the redeemable convertible preferred stock was convertible at any time into such number of shares of common stock as determined by dividing the original issue price per share of the respective series by the applicable conversion price. The initial conversion price per share was equal to the original issue price per share of the respective series. The conversion price of the redeemable convertible preferred stock was subject to adjustments for recapitalizations and under anti-dilution provisions contained in the Company’s amended and restated certificate of incorporation. All outstanding shares of the redeemable convertible preferred stock were subject to automatic conversion into shares of common stock, at the applicable conversion price, upon either of the following: (a) the closing of the sale of shares of common stock at a price per share of at least $ 17.7109 , as adjusted to reflect the Consideration Ratio, in a firm-commitment underwritten public offering under the Securities Act of 1933, as amended, resulting in at least $ 100.0 million of proceeds to the Company, net of the underwriting discount and commissions, and on a qualified stock exchange, or (b) the date and time, or the occurrence of an event, specified by the Requisite Holders and the Requisite Series B Holders, voting or consenting as two separate groups. 21 Table of Contents Common Stock Amendment to Certificate of Incorporation In April 2025, the Company amended and restated its certificate of incorporation to increase the authorized redeemable convertible preferred stock from 36,386,702 to 38,896,148 shares and the authorized common stock from 41,341,250 to 44,008,427 shares. In August 2025, in connection with the de-SPAC Transaction, the Company filed a new certificate of incorporation that authorized the issuance of up to 510,000,000 shares with a par value of $ 0.0001 per share, including 500,000,000 shares of common stock, and 10,000,000 shares of undesignated preferred stock. Shares Reserv ed for Issuance The Company had the following shares reserved for issuance: March 31, December 31, 2026 2025 Common stock options issued and outstanding 12,064,129 9,035,498 Restricted Stock Units ("RSU"s) unvested and expected to vest 368,470 — Shares available for issuance under the stock option and incentive plan 1,521,834 459,417 Shares available for issuance under the employee stock purchase plan 1,808,313 895,607 Shares available for issuance under the inducement plan 852,500 1,046,940 Total 16,615,246 11,437,462 9. Leases In November 2024, the Company entered into an agreement for the lease of approximately 10,934 square feet of office space in South San Francisco, California for 61 months. The Company has the option to renew for an additional four-year term. The renewal option was not reasonably certain to be exercised by the Company and was excluded from the lease term. The lease commenced in March 2025 and will expire in April 2030 . The associated lease costs were not material during the three months ended March 31, 2026 and 2025. As of March 31, 2026, the weighted average remaining lease term for the Company’s lease was 4.1 years, a nd the discount rate used was 7.40 %. The following table presents the amortization of the Company’s lease liabilities recorded in the condensed consolidated balance sheet at of March 31, 2026 (in thousands): Fiscal year ended December 31: 2026 (nine months) 533 2027 730 2028 755 2029 782 2030 263 Total lease payments $ 3,063 Less: imputed interest ( 419 ) Total operating lease liabilities $ 2,644 Short-term lease costs w ere $ 0.2 million and $ 0.6 million for the three months ended March 31, 2026 and 2025 , respectively. 22 Table of Contents 10. Stock-Base d Compensation Stock-based compensation is included under the following expense categories presented in the condensed consolidated statements of operations (in thousands): Three Months Ended March 31, 2026 2025 Research and development $ 1,938 $ 440 General and administrative 1,933 187 Total $ 3,871 $ 627 Common Stock Options Issued and Other Equity-Based Awards Issued by the Company 2016 Equit y Incentive Plan In January 2017, the Company adopted the 2016 Equity Incentive Plan (“2016 Plan”). The 2016 Plan provides for the grant of stock-based incentive awards, including common stock options and other forms of stock-based compensation. Any cancelled or forfeited awards under the 2016 Plan become available for future issuances. As of March 31, 2026 , no shares were reserved for future issuance under the 2016 Plan. 2025 Stock Option and Incentive Plan In August 2025, the Company adopted the 2025 Stock Option and Incentive Plan (“2025 Plan”). The 2025 Plan provides for the grant of equity and equity-based incentive awards, such as stock options and other forms of stock-based compensation, to officers, employees, directors, and consultants. Any cancelled or forfeited awards under the 2025 Plan become available for future issuances. As of March 31, 2026 , 1,521,834 shares were available for future grants under the 2025 Plan. 2025 Employee Stock Purchase Plan In August 2025, the Company adopted the 2025 Employee Stock Purchase Plan (“ESPP”). Under the ESPP, eligible employees may purchase shares of BBOT’s common stock through payroll deductions at a price equal to 85 % of the fair market value of the common stock on the offering date or the exercise date, whichever is less. As of March 31, 2026 , 1,808,313 shares were available for future grants under the ESPP, and no offering periods had started. 2025 Inducement Plan In October 2025, the Company adopted the 2025 Inducement Plan (“2025 Inducement Plan”) to be used for grants of equity-based awards to individuals who were not previously its employees or directors as an inducement for entry into employment. Any cancelled or forfeited awards under the 2025 Inducement Plan become available for future issuances. As of March 31, 2026, 852,500 shares were available for future grants under the 2025 Inducement Plan. Outstanding C ommon Stock Options The Company had the following common stock options outstanding: Number of Options Weighted-Average Exercise Price Weighted-Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (In thousands) Outstanding as of December 31, 2025 9,035,498 $ 7.79 9.0 $ 42,771 Granted 3,228,045 11.19 Exercised ( 97,163 ) 4.28 Forfeited and cancelled ( 102,251 ) 8.68 Outstanding as of March 31, 2026 12,064,129 $ 8.72 9.2 $ 15,908 Exercisable as of March 31, 2026 2,226,329 $ 6.26 8.6 $ 6,936 23 Table of Contents The aggregate intrinsic value in the above table is calculated as the difference between the estimated fair value of the Company’s common stock and the exercise price of the underlying stock options as of each reporting date. As of March 31, 2026, a total o f 1,730,153 common stock options included provisions for accelerated vesting in connection with a qualified change in control of the Company. These instruments included 1,507,214 options, with vesting if the grantee is terminated without cause, as defined in the 2016 Plan, or for good reason, as defined in the grant terms, within 12 months following such a transaction. The remaining 222,939 options vest immediately upon the occurrence of a qualified change in control, excluding events such as an initial public offering or other bona fide financing transactions. The closing of the de-SPAC Transaction described in Note 1 did not constitute a qualified change in control event under these definitions. The weighted-average grant-date fair value of common stock options granted during three months ended March 31, 2026 was $ 7.52 per share. The weighted-average grant-date fair value of common stock options vested and forfeited during the three months ended March 31, 2026 was, $ 4.10 and $ 6.57 per share, respectively. As of March 31, 2026, there was $ 61.5 million of unrecognized stock-based compensation related to unvested common stock options, which is expected to be recognized over a weighted-average period of 3.2 years. There were no grants issued during the three months ended March 31, 2025. The fair value of stock options gran ted during the three months ended March 31, 2026 were estimated at the grant date using the Black-Scholes option pricing model based on the following assumptions: Three Months Ended March 31, 2026 Expected term, years 5.77 - 6.08 Expected volatility 71.18 % - 74.03 % Expected dividends — Risk-free interest rate 3.8 % - 4.1 % Restricted Stock Units Activity under the 2025 Plan with respect to the Company’s RSUs during the three months ended March 31, 2026 was as follows: Number of Shares Weighted-Average Grant Date Fair Value Outstanding as of December 31, 2025 — $ — Granted 368,470 — Vested and released — — Forfeited and cancelled — — Unvested and expected to vest at March 31, 2026 368,470 $ 10.19 As of March 31, 2026, there was $ 3.7 million of total unrecognized compensation cost related to RSUs that is expected to be recognized over a weighted average period of 3.8 years. 11. Net Loss Per Share A ttributable to Common Stockholders The following common stock equivalents were excluded from the computation of diluted net loss per share as their impact would have been anti-dilutive: As of March 31, 2026 2025 Common stock options issued and outstanding 12,064,129 40,134,786 Unvested RSU's of common stock 368,470 — Redeemable convertible preferred stock on an as-converted into common stock basis — 409,027,108 Shares issuable under the participation right — 28,225,863 Total 12,432,599 477,387,757 24 Table of Contents 12. Related Party Transactions Redeemable Conve rtible Preferred Stock All shares of the Series Seed redeemable convertible preferred stock and Series A redeemable convertible preferred stock were issued to BridgeBio Pharma and became common stock of the Company upon the Closing of the de-SPAC Transaction. Common Stock Issued to BridgeBio Pharma In August 2025, the Company executed an amendment to the transition services agreement with BridgeBio Pharma (“TSA Amendment”). Under the TSA Amendment, BBOT agreed to issue 784,720 shares of the Company’s common stock to BridgeBio Pharma by October 31, 2025 (“TSA Shares”) as a one-time charge related to the Closing of the de-SPAC Transaction. The promise to issue the TSA Shares represented a nonreciprocal transfer since the Company did not receive a commensurate value in exchange for the TSA Shares and was treated as a non-pro-rata distribution to a related party. During the year ended December 31, 2025, the Company recorded $ 7.8 million, included in general and administrative expenses in the consolidated statements of operations using the closing price of its common stock as of the TSA Amendment date. The promise to issue the TSA Shares was concluded to be equity-classified, and the corresponding credit was recorded to additional paid-in capital. The TSA Shares were issued and became outstanding in October 2025. Under the TSA Amendment, the issuance of the TSA Shares was not contingent on any condition other than the passage of time, and these shares are treated as outstanding for basic and diluted net loss per share calculation purposes from the TSA Amendment date. Collaborative Arrangement with Related Party In July 2025, the Company executed a research and collaboration agreement (“RCA”) with a related party (“RCA Party”) to grant a license over its intellectual property with respect to the new indication being developed by the RCA Party (“RCA License”) and perform certain research and development activities (“RCA Service”) intended to achieve an acceptance of an investigational new drug application that will be owned and further developed by the RCA Party. During the three months ended March 31, 2026, the Company recognized $ 0.1 million in connection with the RCA, which is included as a reduction to research and development expenses in the condensed consolidated statement of operations. Related Party In come and Expenses During the three months ended March 31, 2026, the Company recognized $ 0.1 million in research and development expenses for the services provided by BridgeBio Pharma under the transition services agreement and related amendments. During the three months ended March 31, 2025 , the Company recognized $ 0.3 million and $ 0.2 million in research and development expenses and general and administrative expenses, respectively, for the services provided by BridgeBio Pharma. No related party income was recognized during the three months ended March 31, 2026 or 2025. 25 Table of Contents ITEM 2. MANAGEMENT’S DISCUSSI ON AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS This discussion and analysis of our financial condition and results of operations of BridgeBio Oncology Therapeutics, Inc. (“BBOT” “we” “our” or “us”) should be read together with the condensed consolidated financial statements for the three months ended March 31, 2026 and 2025, and related notes included in this Quarterly Report on Form 10-Q (“Quarterly Report”). This discussion may contain forward-looking statements including, but not limited to, our expectations or predictions of future financial or business performance or conditions. Forward-looking statements are inherently subject to risks, uncertainties, and assumptions. Factors that could cause or contribute to such differences include, but are not limited to, those identified below and those discussed in the sections entitled “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements” included in the Annual Report on Form 10-K (the "Form 10-K"). Overv iew We are a clinical-stage biopharmaceutical company advancing a next-generation pipeline of novel small-molecule therapeutics targeting RAS and Phosphoinositide 3-kinase (“PI3K”) headquartered in South San Francisco, California. Our mission is to accelerate scientific and medical breakthroughs and deliver well-tolerated medicines with greater efficacy and safety to people with the deadliest cancers. We are advancing our next-generation RAS-pathway targeted small molecules with a focus on optimized target coverage for patients with tumors driven by RAS and PI3Kα and a synergistic portfolio that is designed to enable targeted KRAS combinations. Since our inception, we devoted substantially all of our resources to raising capital, conducting discovery and research activities, and establishing arrangements with third parties. We are currently developing three lead product candidates: • BBO-8520 is an orally bioavailable small molecule direct inhibitor targeting both the ON and OFF states of KRAS. The U.S. Food and Drug Administration (FDA) has granted Fast Track designation to BBO-8520 for the treatment of adult patients with previously treated, KRAS G12C-mutated metastatic non-small cell lung cancer ("NSCLC"). We are currently enrolling the Phase 1 ONKORAS-101 trial (NCT06343402) for patients with KRAS G12C mutant NSCLC. ONKORAS-101 is an open-label, multi-center Phase 1a/1b study designed to evaluate the safety, tolerability, preliminary antitumor activity, and pharmacokinetics of BBO-8520 as a single agent and in combination with pembrolizumab in patients with KRASG12C mutant NSCLC. On January 7, 2026, we announced new clinical data from the ongoing Phase 1 trial. As of November 15, 2025, BBO-8520 monotherapy in patients with KRASG12C NSCLC showed a 65% objective response rate (ORR) and a 68% 6-month progression-free survival (PFS), with 83% of patients eligible for 6-month follow-up remaining on treatment for ≥6 months, alongside a potentially differentiated safety profile. Encouraging early efficacy signals were seen in patients with KRASG12C and STK11 and/or KEAP1 co-mutants, where all five initial patients achieved partial response (PR). BBO-8520 in combination with pembrolizumab, at active dose levels, demonstrated promising efficacy data and a distinct safety profile, including a potentially differentiated liver toxicity profile. Updated clinical data are expected in the second half of 2026 and an internal combination study with BBO-10203 opened in April 2026. • BBO-11818 is an orally bioavailable small molecule pan-KRAS inhibitor that targets mutant KRAS in both the ON and OFF states. We are currently enrolling the Phase 1 KONQUER-101 (NCT06917079) trial for patients with locally advanced or metastatic KRAS mutant solid tumors. On January 7, 2026, we announced preliminary clinical data from the ongoing Phase 1 trial. BBO-11818 demonstrated encouraging early anti-tumor activity across dose levels and tumor types, including a PR in a patient with pancreatic ductal adenocarcinoma (PDAC) with a 56% tumor reduction. BBO-11818 monotherapy appeared generally tolerable with no dose-limiting toxicities (DLTs). On April 20, 2026 we announced that BBOT was granted U.S. FDA Fast Track designation for BBO-11818 for the treatment of adult patients with advanced KRAS-mutant PDAC. Further, in April 2026, we presented preclinical data demonstrating that BBO-11818 had robust anti-tumor activity in KRAS-mutant preclinical models at the AACR Annual Meeting 2026. Updated Phase 1 clinical data are expected in the second half of 2026. An internal combination study with BBO-10203 is anticipated to open later in 2026. • BBO-10203 is an orally bioavailable small molecule with a novel mechanism of action designed to inhibit the physical interaction between RAS and PI3Kα, inhibiting RAS-driven PI3Kα-AKT signaling in tumors. We are currently enrolling the Phase 1 BREAKER-101 trial (NCT06625775) for patients with locally advanced or metastatic HER2+ breast cancer, HR+/HER2-breast cancer, KRAS mutant colorectal cancer, and KRAS mutant non-small cell lung cancer. On January 7, 2026, we announced preliminary clinical data from the ongoing Phase 1 trial. BBO-10203 demonstrated a differentiated safety profile with no hyperglycemia in patients without restrictions on baseline HbA1c and glucose levels. In addition, BBO-10203 achieved target systemic exposure and rapid full target engagement. Clinical benefit was observed in patients with colorectal cancer (CRC) (>80% 3L+) and hormone receptor positive breast cancer (HR+ BC) who were previously heavily treated and tumor reductions were observed in some patients. Updated clinical data are expected in the second half of 2026 and internal combinations, including with BBO-8520 and BBO-11818, are anticipated to open later in 2026. In April 2026, we presented 26 Table of Contents preclinical data showing that BBO-10203 inhibits PI3Kα/AKT signaling in HER2 AMP models at the American Association for Cancer Research ("AACR") Annual Meeting 2026. Updated clinical data are expected in the second half of 2026 and internal combination studies are anticipated to open later in 2026. • In March 2026, we announced the appointment of Peter Lebowitz, M.D., Ph.D. as a member of the board of directors with immediate effect, who will serve as a Class I director appointed to the NCG Committee and Compensation Committee of the Board effective as of the date of his appointment as a director. • In April 2026, we announced the appointment of Neil Kumar, Ph.D. as Executive Chairman of the Board of Directors, Pedro J. Beltran, Ph.D. as Chief Executive Officer, Idan Elmelech as Chief Operating Officer, and Marc Cobo as Principal Accounting Officer effective April 20, 2026. Former CEO, Eli Wallace, PhD, will serve as a Senior Adviser to the Company, continuing to leverage his scientific expertise and deep understanding of BBOT’s programs to support the company going forward. This transition reflects BBOT entering a new phase of development as the company’s three clinical assets enter expansions and combinations across multiple RAS-driven cancers. The Board of Directors believes that elevating the next generation of the Company’s leadership will enable the company to execute with strategic precision and purpose in order to improve outcomes for patients with RAS and PI3Kα malignancies. We have no product candidates approved for sale and have not generated any revenue related to our product candidates. Since inception, we have incurred significant operating losses. For the three months ended March 31, 2026, we incurred a net loss of $42.1 million and had an accumulated deficit of $398.7 million as of March 31, 2026. For the year ended December 31, 2025, we incurred a net loss of $134.0 million. Our ability to generate sufficient product revenue to achieve profitability will depend heavily on the development and eventual commercialization efforts related to our product candidates. We expect to continue to incur significant expenses, and our operating losses are expected to increase for the foreseeable future if and as we: • Advance our existing and future research and development, including potential expansion into additional indications; • Conduct future clinical studies for our product candidates; • Pursue investigational new drug applications or comparable foreign applications that allow commencement of the planned clinical trials or future clinical trials for any programs we may develop; • Hire research and development, clinical, manufacturing, and commercial personnel; • Add operational, financial, and management information systems and personnel; • Experience any delays, challenges, or other issues associated with the preclinical and clinical development of our product candidates, including with respect to our regulatory strategies; • Develop, maintain, and enhance sustainable, scalable, reproducible, and transferable clinical and commercial-scale current good manufacturing practices (“cGMP”) capabilities through a third party or our own manufacturing facility for the product candidates that we may develop; • Seek, obtain, and maintain regulatory approvals for any product candidates for which we successfully complete clinical trials; • Ultimately establish a sales, marketing, and distribution infrastructure to commercialize any product candidates for which we may obtain regulatory approval; • Generate revenue from commercial sales of product candidates for which we receive regulatory approval, if any; • Maintain safety, tolerability, and efficacy profile of any product we may develop in additional indications following approval in one indication; • Maintain, expand, enforce, defend, and protect our intellectual property portfolio and other intellectual property protection or regulatory exclusivity for any products we may develop and defend any intellectual property-related claims; • Further acquire or in-license product candidates or programs, intellectual property, and technologies; • Maintain our current licenses and establish and maintain any future collaborations, including making related development and sales milestone payments, royalties, or other required payments; and 27 Table of Contents • Incur additional costs of operating as a public company, including increased costs of audit, legal, regulatory, and tax-related services associated with maintaining compliance with an exchange listing and the SEC requirements, director and officer insurance premiums and investor and public relations costs. Any changes in the outcomes of these variables could significantly affect the costs and timing associated with the development of our product candidates. For example, if the FDA or another comparable regulatory authority were to require us to conduct clinical trials beyond those that we currently anticipate will be required to complete clinical development and obtain regulatory approval of one or more product candidates, or if we experience significant delays in our preclinical studies or clinical trials, we would be required to expend significant additional financial resources and time to advance and complete clinical development. We may never obtain regulatory approval for any of our product candidates. We will not generate revenue from product sales unless and until we successfully initiate and complete clinical development and obtain regulatory approval for any product candidates. If we obtain regulatory approval for any of our product candidates and do not enter into a commercialization partnership, we expect to incur significant expenses related to developing our commercialization capability to support product sales, manufacturing, marketing, and distribution. As a result of the above factors, we expect to need substantial additional funding to support our continued operations and growth strategy. Until such a time as we can generate significant revenue from our product sales, if ever, we expect to finance our operations through the sale of equity, debt financings, or other capital sources, including collaborations with other companies or other strategic transactions. We may not be able to raise additional funds or enter into such other agreements on favorable terms or at all. If we fail to raise capital or enter into such agreements as and when needed, we may have to significantly delay, scale back, or discontinue the development and commercialization of one or more of our programs. Due to the numerous risks associated with product development, we cannot accurately predict the timing or amount of increased expenses, or when or if we will be able to achieve or maintain profitability. Even if we are able to generate product sales, we may not become profitable. If we fail to become profitable or cannot sustain profitability on a continuing basis, then we may be unable to continue our operations at planned levels and be forced to reduce or terminate our operations. de-SPAC Tra nsaction On February 28, 2025, TheRas, Inc. (“Legacy BBOT”) entered into a definitive business combination agreement, amended on June 17, 2025 (“Business Combination Agreement”) with Helix Acquisition Corp. II (“Helix”), a publicly traded special purpose acquisition company listed on Nasdaq under the ticker symbol “HLXB.” Pursuant to the Business Combination Agreement closing, Helix II Merger Sub, Inc., a wholly owned subsidiary of Helix, merged with and into Legacy BBOT, with Legacy BBOT surviving the merger as a wholly-owned subsidiary of Helix (“Merger”). In connection with the Merger, Helix changed its name to BridgeBio Oncology Therapeutics, Inc. and redomiciled as a Delaware corporation (“de-SPAC Transaction”). The de-SPAC Transaction was consummated on August 11, 2025 (“Closing”), and BBOT’s common stock became listed on Nasdaq under the ticker symbol “BBOT”. Prior to the Closing, all references to BBOT are related to the balances and activity of Legacy BBOT. Upon the Closing, BBOT became the successor of Helix and the reporting entity which consolidates the balances and activity of Legacy BBOT. Concurrent with the execution of the Business Combination Agreement, Helix entered into subscription agreements with certain investors pursuant to which Helix agreed to issue and sell shares of its common stock to investors in a private placement financing (“PIPE Financing”) for an aggregate purchase price of approximately $260.9 million, which was executed immediately prior to the Closing. The de-SPAC Transaction was accounted for as a reverse recapitalization effective upon the Closing. Under this method of accounting, Helix was treated as the acquired company for accounting purposes, and BBOT was the deemed acquirer for accounting purposes. The financial statements of BBOT for periods prior to the Closing include the financial information of Legacy BBOT. The number of shares and per share amounts for all periods presented were adjusted to reflect the capital structure of BBOT. For periods prior to the Closing, the share activity of BBOT was recast by multiplying the number of shares of Legacy BBOT held by each investor by a ratio of approximately 0.0889 (“Consideration Ratio”), established by the Business Combination Agreement, rounded down to the nearest whole share. The de-SPAC Transaction is presented as the issuance of common stock for the net assets of Helix and proceeds from the PIPE Financing, accompanied by a recapitalization and a change in the reporting entity. The net assets of Helix were recorded at historical cost as of the Closing date, with no goodwill or other intangible assets recognized. 28 Table of Contents As a result of the de-SPAC Transaction, we assumed the operations of Legacy BBOT upon the Closing, and we became subject to the regulatory and reporting requirements and customary practices applicable to public companies. The costs and administrative demands of operating as a public company, including hiring additional personnel and implementing certain procedures and processes, may materially impact our financial position and results of operations. Material Related Pa rty Transactions BridgeBio Pharma is a commercial-stage biopharmaceutical company founded to discover, create, test, and deliver transformative medicines to treat patients who suffer from genetic diseases and cancers with clear genetic drivers. BridgeBio Pharma and its controlled entities are related parties of BBOT. In August 2025, upon completion of the de-SPAC Transaction, we made a contractual promise to issue 784,720 shares of our common stock to BridgeBio Pharma (“TSA Shares”), which was not contingent on anything but the passage of time. We treated this transaction as a nonreciprocal transfer with a non-pro-rata distribution to related party. The contract was concluded to be equity-classified, and we recorded general and administrative expense of $7.8 million equal to the fair value of the underlying shares as of the contract execution date. The TSA Shares were issued to BridgeBio Pharma in October 2025. Emerging Growth Company Status As an emerging growth company (“EGC”) under the Jumpstart Our Business Startups Act (the “JOBS Act”), we are eligible for certain regulatory relief, including reduced disclosure obligations and extended transition periods for adopting new or revised accounting standards. Our EGC status commenced upon the completion of Helix’s initial public offering in February 2024 and is expected to continue for up to five years from this date through February 2029, unless certain disqualifying events occur earlier, such as achieving large accelerated filer status. Impact of General Economic Ri s k Factors on Our Operations Uncertainty in the global economy presents significant risks to our business. We are subject to continuing risks and uncertainties in connection with the current macroeconomic environment, including inflation, fluctuating interest rates, new or increased tariffs and other barriers to trade, changes to fiscal and monetary policy or government budget dynamics, particularly in the pharmaceutical and biotech spaces, bank failures, geopolitical factors, including the ongoing conflicts between Russia and Ukraine and in the Middle East and the responses thereto, and supply chain disruptions. While we closely monitor the impact of the current macroeconomic and geopolitical conditions on all aspects of our business, including the impacts on participants in any future clinical trials and our employees, suppliers, vendors, business partners, and our future access to capital, the ultimate extent of the impact on our business remains highly uncertain and will depend on future developments and factors that continue to evolve. Most of these developments and factors are outside of our control and could exist for an extended period. We will continue to evaluate the nature and extent of the potential impacts on our business, results of operations, liquidity, and capital resources. Components of Results of Operations Rev enues To date, we have not generated any revenue from product candidates under development and do not expect to generate any revenue in the foreseeable future. If our development efforts for our product candidates are successful and result in regulatory approval, we may generate revenue from product sales in the future. We cannot predict if, when, or to what extent we will generate revenue from the commercialization and sale of our product candidates. We may never succeed in obtaining regulatory approval for any of our product candidates. Operating Expenses Research and D evelopment Expenses Research and development expenses consist primarily of costs incurred for our research activities, including our drug discovery efforts, and the development of our product candidates, which include: • Employee-related expenses, including salaries, related benefits, stock-based compensation, and travel expenses for employees engaged in research and development functions; 29 Table of Contents • Expenses incurred in connection with the preclinical and clinical development of our product candidates, including under agreements with contract research organizations (“CROs”) ; • The cost of consultants and contract manufacturing organizations (“CMOs”) that manufacture drug products for use in our preclinical studies and clinical trials ; • Facilities, depreciation, insurance, and other direct and allocated expenses incurred as a result of research and development activities; and • Payments made under third-party licensing and asset acquisition agreements. We expense research and development costs as incurred. Non-refundable advance payments that we make for goods or services to be received in the future for use in research and development activities are recorded as prepaid expenses. The prepaid amounts are expensed as the related goods are delivered or the services are performed. Our direct research and development costs consist primarily of external costs, such as fees paid to consultants, contractors, CMOs, and CROs in connection with our preclinical and clinical development activities. We are heavily dependent on the success of our product candidates, which are in early stages of development, and require a lengthy and expensive process with uncertain outcomes and the potential for substantial delays. We cannot give any assurance that any of our product candidates will receive regulatory approval, which is necessary before they can be commercialized. Product candidates in later stages of clinical development generally have higher development costs than those in earlier stages, primarily due to the increased size and duration of later-stage clinical trials. We expect that our research and development expenses will increase substantially in connection with our planned clinical and preclinical development activities in the near term and in future reporting periods, as we conduct additional clinical trials for our product candidates. We currently track research and development expenses based on expense nature. General and Ad ministrative Expenses Our general and administrative costs consist primarily of fair value of common stock issued to BridgeBio Pharma, employee-related costs, travel expenses, expenses for outside professional services, including legal, human resources, audit, accounting, and tax services, and allocated facilities-related costs. Employee-related costs include salaries, bonuses, related benefits, and stock-based compensation. We expect to incur additional expenses as a result of operating as a public company, including expenses related to compliance with the rules and regulations of the SEC and listing standards applicable to companies listed on a national securities exchange, additional insurance expenses, investor relations activities, and other administrative and professional services. We also expect to increase the size of our administrative, finance, and legal functions to support the anticipated growth of our business. Other Income , Net Intere st Income Other income consists of interest income earned on our cash equivalents and marketable securities. Income from Transition Services Agreements Income from transition services agreements includes income for certain services provided to an unrelated party. Change in Fair Value o f Participation Right Liability Change in fair value of participation right liability represents the income or expense from the right to participate in the Legacy BBOT Series B Financing that we provided to the Regents of the University of California (“UCSF”), which was determined to be a freestanding financial instrument. This right was not exercised upon the initial issuance of the Series B in April 2024 and was subsequently extended through March 2025. UCSF elected to exercise the participation right in March 2025, and it was settled in full through the issuance of Series B shares in April 2025. 30 Table of Contents Results of Operations Comparison of the three months ended March 31, 2026 and 2025 The following table sets forth a summary of our results of operations for the three months ended March 31, 2026 and 2025 (in thousands): Three Months Ended March 31, 2026 2025 Change Change, % Operating expenses: Research and development 39,802 20,635 19,167 93 % General and administrative 6,377 2,502 3,875 155 % Total operating expenses 46,179 23,137 23,042 100 % Loss from operations (46,179 ) (23,137 ) (23,042 ) 100 % Other income, net: Interest income 3,944 1,809 2,135 118 % Income from transition services agreements 223 — 223 100 % Change in fair value of participation right liability — (725 ) 725 (100 )% Other income (expense) (94 ) (2 ) (92 ) * Total other income, net 4,073 1,082 2,991 276 % Net loss $ (42,106 ) $ (22,055 ) $ (20,051 ) 91 % * Percentage is not meaningful Research and Development Expenses Research and development expenses consisted of the following components for the periods indicated (in thousands): Three Months Ended March 31, 2026 2025 Change Research and development trials and consumables expenses $ 28,848 $ 13,278 $ 15,570 Payroll and personnel expenses 9,455 5,561 3,894 Facilities and other expenses 1,499 1,796 (297 ) Total research and development $ 39,802 $ 20,635 $ 19,167 Research and development expenses increased by $19.2 million or 93%, from $20.6 million for the three months ended March 31, 2025, to $39.8 million for the three months ended March 31, 2026. The changes in research and development expenses include the following key drivers: • a $15.6 million increase in research and development trials and consumables expenses pertaining to increases in clinical trial expenses and manufacturing expenses for BBO-8520, BBO-10203 and BBO-11818, • a $3.9 million increase in our payroll and personnel expenses primarily due to headcount expansion, and • a $0.3 million decrease in facilities and other expenses as a result of reduced professional fees and consulting costs from related parties attributable to the winding down of activities under the transition services agreement with BridgoBio Pharma. 31 Table of Contents General and Admi nistrative Expenses General and administrative expenses increased by $3.9 million or $155%, from $2.5 million for the three months ended March 31, 2025, to $6.4 million for the three months ended March 31, 2026. The changes in our general and administrative expenses were driven by the following key drivers: • a $3.0 million increase in payroll and personnel-related expenses which reflects increased headcount as a result of our standalone operations after the de-SPAC Transaction, and • a $0.9 million increase in professional and consultant fees, insurance and taxes, and facilities costs due to the growth and establishment of our operations as a public company. Interest In come Interest income increased by $2.1 million, from $1.8 million for the three months ended March 31, 2025, to $3.9 million for the three months ended March 31, 2026. Interest income was higher during the first quarter of 2026 due to interest earnings on our cash, cash equivalents, and marketable securities portfolio which includes the proceeds from the de-SPAC Transaction and PIPE Financing completed in August 2025. Income from Transition Services Agreements Other income of $0.2 million for the three months ended March 31, 2026 was related to a transition services agreement with an unrelated party. There was no income from transition services agreements during the three months ended March 31, 2025. Change in Fair Value of Participation Right Liability No change in fair value of participation right liability was recorded for the three months ended March 31, 2026 because the participation right was settled in full in April 2025. The change in fair value of participation right liability of $0.7 million for the three months ended March 31, 2025 represents the increase in the estimated fair value per share of the underlying Legacy BBOT Series B redeemable convertible preferred stock relative to the fixed price per share granted to UCSF in connection with the participation right. The participation right was settled in full in April 2025, and there were no subsequent changes in fair value of the associated liability. Liquidity, Going Con cern, and Capital Resources Sources of Liquidity Since our inception, we have incurred significant operating losses. For the three months ended March 31, 2026, we incurred a net loss of $42.1 million and had an accumulated deficit of $398.7 million as of March 31, 2026. For the year ended December 31, 2025, we incurred a net loss of $134.0 million. In January 2017, we issued to BridgeBio Pharma 800,061 shares of Series Seed redeemable convertible preferred stock in a single closing at $1.2508 per share for gross cash proceeds of $1.0 million. Between May 2017 and April 2024, we issued to BridgeBio Pharma 10,929,005 shares of Series A redeemable convertible preferred stock (“Series A”) at $11.2467 per share for gross cash proceeds of $122.9 million and 2,072,629 shares of the Series A at $11.2467 per share in exchange for the settlement of related party payables of $23.3 million. In April 2024, we received $175.0 million in gross cash proceeds from the issuance of 19,761,881 shares of Series B at $8.8554 per share. In May 2024, we received $25.0 million in gross cash proceeds through the issuance of 2,823,126 shares of Series B at $8.8554 per share. In March 2025, UCSF elected to exercise the Participation Right. We settled the Participation Right in April 2025 through the issuance of 2,509,446 shares of the Series B for $22.2 million of cash proceeds. In August 2025, upon closing of the de-SPAC Transaction, the combined company received $373.5 million from Helix, which included the proceeds from the PIPE Financing, the unredeemed cash held by Helix, and reflected payment of Helix’s transaction costs. The proceeds from the PIPE Financing and reverse recapitalization are expected to advance our project pipeline and will be used for research and development, business development, working capital, and other general corporate purposes. We estimate that the existing cash, cash equivalents, and marketable securities of $388.9 million as of March 31, 2026 will be sufficient to meet the our cash requirements for at least twelve months from the issuance date of the condensed consolidated financial statements for the three months ended March 31, 2026 included in this Quarterly Report. We have based this estimate on assumptions that may prove to be wrong, and our operating plan may change due to many factors currently unknown to management. We could exhaust our available capital resources sooner than management expects. 32 Table of Contents In the future, we plan to access capital resources by public or private equity offerings, debt financings, potential collaborations, licensing agreements, and other sources. We have historically been able to raise capital through the issuance and sale of equity and equity-linked instruments, such as redeemable convertible preferred stock for Legacy BBOT and common stock for BBOT. However, no assurance can be provided that we will continue to be successful in doing so in the future. If sufficient funds on acceptable terms are not available when needed, we may be required to significantly reduce our operating expenses and delay, reduce the scope of, or eliminate one or more of our development programs. Failure to manage discretionary spending or raise additional financing, as needed, may adversely impact our ability to achieve our intended business objectives. Cash F lows Overview of Cash Flows We have historically financed our operations primarily through the sale of equity securities. The de-SPAC Transaction executed in August 2025 represents a major financing event for our business generating cash inflows from the reverse recapitalization and the associated PIPE Financing. We utilized the proceeds from these financing transactions to finance our operations during the three months ended March 31, 2026 and anticipate to continue doing so in the future to facilitate the development of our product candidates. The changes in our working capital structure and operating cash flows were notably impacted by the timing of cash disbursements related to our research and development activities. Specifically, we made significant prepayments under our agreements with contract research organizations and contract manufacturing organizations prior to the commencement of clinical trials and manufacturing activities. These upfront deposits increase our prepaid expenses and non-current assets and accelerate cash outflows in periods prior to the recognition of the associated research and development expenses, causing period-over-period fluctuations in our operating cash burn, especially as we ramp up the development of our product candidates. Cash Flow Comparison for the three months ended March 31, 2026 and 2025 The following table summarizes our cash flows during the periods indicated (in thousands): Three Months Ended March 31, 2026 2025 Change Net cash used in operating activities $ (35,917 ) $ (19,599 ) $ (16,318 ) Net cash (used in) provided by investing activities (285,407 ) 15,368 (300,775 ) Net cash provided by (used in) financing activities 295 (404 ) 699 Net decrease in cash, cash equivalents, and restricted cash $ (321,029 ) $ (4,635 ) $ (316,394 ) Net Cash Flows from Operating Activities Net cash used in operating activities for the three months ended March 31, 2026 was 35.9 million. This amount consisted of our net loss of $42.1 million, adjusted for a change in net operating assets and liabilities of $2.2 million, and further reduced by non-cash charges of 4.0 million. Our non-cash adjustments primarily consisted of $3.9 million in stock-based compensation, $0.1 million in depreciation, and $0.1 million in amortization of right-of-use assets, partially offset by $0.1 million in net accretion of premiums on marketable securities. The net change in operating assets and liabilities was primarily due to increases in our liabilities, including a $10.7 million increase in accounts payable, a $0.9 million increase in accrued professional services, a $0.4 million in net balance due to and from related parties, and $0.3 million in other accrued liabilities, as well as an increase of $1.3 million in other non-current assets. These changes were partially offset by a decreases of $7.5 million in prepaid expenses, $3.7 million in accrued compensation and benefits and $0.1 million in operating lease liabilities. 33 Table of Contents Net cash used in operating activities for the three months ended March 31, 2025 was $19.6 million. This amount consisted of our net loss of $22.1 million, adjusted for a change in net operating assets and liabilities of $1.5 million, and further reduced by non-cash charges of $1.0 million. Our non-cash adjustments primarily included $0.7 million for losses from changes in the fair value of the participation right liability, $0.6 million in stock-based compensation, and $0.1 million in depreciation, partially offset by $0.4 million in net accretion of premiums on marketable securities. The net change in operating assets and liabilities was primarily due to a $2.3 million increase in accrued research and development liabilities, a $0.5 million increase in accounts payable, and $0.2 million in accrued professional services, and an increase of $0.3 million in prepaid expenses and other current assets. These changes were partially offset by a decrease of $2.0 million in accrued compensation and benefits. Net Cash Flows from Investing Activities Net cash used in investing activities for the three months ended March 31, 2026 was $285.4 million, which consisted of $26.3 million in cash inflows from maturities of marketable securities, offset by $311.6 million in cash outflows from purchases of marketable securities. The proceeds from the de-SPAC Transaction and were primarily invested in cash equivalents and short-term marketable securities as of December 31, 2025, but were reallocated to investments in short and long-term marketable securities as of March 31, 2026. This resulted in significant cash flows from investing activities for the three months ended March 31, 2026 as a result of purchases of marketable securities. Net cash provided by investing activities for the three months ended March 31, 2025, was $15.4 million, which consisted of $40.0 million in cash inflows from maturities of marketable securities, offset by $24.4 million in cash outflows from purchases of marketable securities and $0.2 million in purchases of property and equipment. Net Cash Flows fro m Financing Activities Net cash provided by financing activities of $0.3 million for the three months ended March 31, 2026 included $0.4 million in proceeds from option exercises, offset by $0.1 million in payments of deferred transaction costs. Net cash used in financing activities of $0.4 million for the three months ended March 31, 2025 which was comprised of payments of deferred transaction costs. Future Funding Requirements We will not generate revenue from product sales unless we complete clinical development and obtain regulatory approval for our product candidates. If we obtain regulatory approval for any of our product candidates and do not enter into a commercialization partnership, we expect to incur significant expenses related to developing our internal commercialization capability to support product sales, marketing, and distribution. Subsequent to the de-SPAC Transaction, we expect to incur additional costs associated with operating as a public company. In the future, we will need substantial additional funding to support our continuing operations and pursue our growth strategy. Until we can generate significant revenue from product sales, if ever, we expect to finance our operations through a combination of equity offerings, debt financings, collaborations, strategic alliances, and marketing, distribution, or licensing arrangements. If we do raise additional capital through public or private equity offerings, the ownership interest of our existing stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect our stockholders’ rights. If we raise additional capital through debt financing, we may be subject to covenants that limit or restrict our ability to take specific actions, such as incurring debt, making capital expenditures, or declaring dividends. Furthermore, we may be unable to raise additional funds or enter into other agreements or arrangements on favorable terms or at all when needed. If we fail to raise capital or enter into such agreements, as and when needed, we may have to significantly delay, scale back, or discontinue the development and commercialization of one or more of our product candidates. Due to the numerous risks and uncertainties associated with the research, development, and commercialization of pharmaceutical products, we are unable to accurately estimate the exact amount of our operating capital requirements. Our future funding requirements will depend on many factors, including, but not limited to: • The successful achievement of preclinical and clinical milestones; • Continuing our research and drug discovery and development efforts; • Conducting preclinical and clinical trials for our current product candidates and additional product candidates; • Establishing a sales, marketing, and distribution infrastructure to commercialize any product candidates for which we may obtain regulatory approval; 34 Table of Contents • Establishing and maintaining manufacturing and supply chain capacity sufficient to provide adequate supplies of our product candidates to support our ongoing and planned clinical trials and commercial quantities of any product candidates for which we may obtain marketing approval; • Maintaining, expanding, and protecting our intellectual property portfolio; • Acquiring or in-licensing other product candidates and technologies; • Continuing to discover and develop additional product candidates; • Hiring additional personnel to support our product candidate development efforts to obtain regulatory approval and securing additional facilities for operations; and • Operating as a public company following the de-SPAC Transaction. Due to the numerous risks and uncertainties associated with the development of our product candidates, we are unable to accurately predict the timing or amount of increased expenses, or when or if we will be able to achieve or maintain profitability. Even if we are able to generate product sales, we may not become profitable. If we fail to become profitable or are unable to sustain profitability on a continuing basis, then we may be unable to continue our operations at the planned levels and be forced to reduce or terminate our operations. In-Licensing and Co llaboration Agreements The Regents of the University of California License Agreements In September 2016, BBOT entered into a license agreement with UCSF and was granted certain worldwide exclusive licenses to use the licensed compounds (the “UCSF License”). The UCSF License was subsequently amended and was terminated in June 2021. Under the UCSF License, UCSF received the right, but not an obligation, to purchase up to 10% of the securities in any offering on the same terms as other investors, which survived the termination of the UCSF License (“Participation Right”). Because UCSF was not notified of the Legacy BBOT Series B Financing at the time it was completed in 2024, the Participation Right was extended through March 29, 2025. As a result, UCSF received the right to purchase up to 2,509,446 shares of Series B at the original issue price of $8.8554 per share. In April 2025, we settled the Participation Right in full by issuing of 2,509,446 Series B shares for cash proceeds of $22.2 million, and it was no longer outstanding as of December 31, 2025. Leidos Biomedical Research License and C ooperative Research and Development Agreements In March 2017, we entered into a cooperative research and development agreement (“Leidos CRADA”) with Leidos Biomedical Research, Inc. (“Leidos”). In December 2018, we entered into a license agreement (“Initial Leidos License”), under which BBOT was granted certain worldwide exclusive licenses to use the licensed compounds related to its drug discovery and development initiatives. The Initial Leidos License was terminated in 2021. BBOT and Leidos subsequently entered into three additional license agreements (“Additional Leidos Licenses”), including two related to KRAS G12C inhibitor and P13Ka breaker compounds that were executed in August 2022, and one related to the PanKRAS inhibitor executed in December 2023. The Leidos CRADA, the Initial Leidos License, and the Additional Leidos Licenses are referred to as the “Leidos Agreements.” In December 2025, we executed an amendment to extend the expiration date of the Leidos CRADA by nine months to September 2026. In December 2025, the Leidos Agreements were amended to introduce an additional $1.5 million in contribution funding payments. Under the Additional Leidos Licenses, BBOT incurred initial upfront fees of $1.8 million and we are required to pay Leidos certain annual license maintenance fees and royalties on net sales for such licensed compounds. As of March 31, 2026, we are obligated to make contingent milestone payments totaling up to $25.9 million upon the achievement of certain clinical and regulatory milestones. As of March 31, 2026 and December 31, 2025, we recorded a $0.5 million liability for milestones that had been achieved but remained unpaid, which is included in the accrued research and development liabilities in the condensed consolidated balance sheets. In connection with our arrangements with Leidos, we recognized research and development expenses of $0.7 million and $1.0 million for the three months ended March 31, 2026 and 2025, respectively. 35 Table of Contents Lawrence Livermore National Security Lic ense and Cooperative Research and Development Agreements In May 2018, BBOT entered into a cooperative research and development agreement (“LLNS CRADA”) with Lawrence Livermore National Security, LLC (“LLNS”) to bring new knowledge and therapeutic possibilities to KRAS drug discovery utilizing LLNS’ high-performance computing machines. BBOT and LLNS executed five subsequent amendments to the LLNS CRADA between December 2019 and November 2025 to clarify the scope and provide for term extensions. In July 2022, BBOT entered into an exclusive patent license agreement for KRAS G12C inhibitors and an exclusive patent license agreement for PI3Kα breaker compounds. In December 2024, BBOT entered into an exclusive license agreement with LLNS for research and development of Pan KRAS inhibitor for oncology indications. In July 2025, BBOT entered into an exclusive license agreement with LLNS for research and development of Pan KRAS inhibitor for non-oncology indications. These four agreements are collectively referred to as the LLNS Agreements. In November 2025, BBOT and LLNS executed three separate amendments to the existing agreements for Pan KRAS inhibitors, PI3Kα breakers, and KRAS G12C inhibitors. These amendments were made to include new patent applications within the scope of patent rights. In November 2025, BBOT and LLNS executed an amendment to extend the LLNS CRADA expiration date by six months to June 2026. In January 2026, the Company and LLNS executed an amendment to extend the LLNS CRADA expiration date another twelve months until June 2027 and included additional estimated funding contributions of $5.0 million to be paid by the Company over the remaining term. Upon execution of the LLNS Agreements, we paid an initial upfront cash fee of $0.2 million. In addition, under the terms of the LLNS Agreements, we are required to pay LLNS certain annual license maintenance fees and royalties to LLNS on net sales for such licensed compounds. As of March 31, 2026, we are required to make contingent milestone payments totaling up to $21.8 million upon the achievement of certain clinical, regulatory, and sales milestones. During the three months ended March 31, 2026, no milestones had been achieved and therefore no liabilities were recorded as of March 31, 2026 on the condensed consolidated balance sheets. BBOT recognized research and development expenses of $0.3 million for the three months ended March 31, 2025 in connection with the LLNS Agreements. As of March 31, 2026, we did not have any off-balance sheet arrangements that have a material current effect or that are reasonably likely to have a material future effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures, or capital resources. Critical Acc ounting Policies and Estimates Our management’s discussion and analysis of our financial condition and results of operations is based on our financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these condensed financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, and the disclosure of contingent assets and liabilities as of the date of the financial statements, as well as revenues, if any, and expenses incurred during the reporting periods. Our estimates are based on our historical experience and various other factors that we believe are reasonable under the circumstances, which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. There have been no significant changes in our critical accounting policies and estimates as compared to the critical accounting policies and estimates disclosed in the section titled “Management’s Discussion and Analysis of Financial Condition and Operations” included in our Annual Report on Form 10-K for the year ended December 31, 2025, as filed with the SEC, except for certain updates to our accounting policy as discussed in Note 2 of our condensed consolidated financial statements as of and for the three months ended March 31, 2026. Recent Accounti ng Pronouncements See Note 2, “Summary of significant accounting policies” to our condensed consolidated financial statements, which are included in this Quarterly Report, for more information. Ite m 3. Quantitative and Qualitative Disclosures About Market Risk. We are a smaller reporting company, as defined by Rule 12b-2 under the Securities and Exchange Act of 1934, as amended ( “ Exchange Act ” ), and are not required to provide the information under this item. 36 Table of Contents Ite m 4. Controls and Procedures. Management’s Evaluation of Disclosure Controls and Procedures We maintain disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) that are designed to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time period specified in the SEC’s rules and forms, and that such information is accumulated and communicated to management, including our Chief Executive Officer (who serves as our principal executive officer), and our Chief Operating Officer (who serves as our principal financial officer), as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating our disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints, and that management is required to apply judgment in evaluating the benefits of possible controls and procedures relative to their costs. Our management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of our disclosure controls and procedures as of March 31, 2026 and, based on this evaluation, concluded that our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) was effective as of March 31, 2026. Changes in Internal Control over Financial Reporting During the three months ended March 31, 2026, we completed the implementation of a new enterprise resource planning ("ERP") system and as a result, modified the design of certain existing internal controls, as well as implemented new controls and procedures impacted by the implementation of the new ERP system. Except for the implementation of the new ERP system, there were no other changes in the Company's internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) during the quarter ended March 31, 2026 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. 37 Table of Contents PART II—OTHE R INFORMATION Item 1. Legal Proceedings. Except as discussed below, as of the date of this Form 10-Q, we are not currently a party to any material legal proceedings. From time to time, in the ordinary course of business, we may become involved in legal proceedings. Regardless of the outcome, litigation could have a material adverse effect on us due to defense and settlement costs, diversion of management resources, negative publicity, reputational harm, and other factors, and there can be no assurances that favorable outcomes will be obtained. In September 2016, BBOT entered into the UCSF License Agreement with The Regents of the University of California, San Francisco for an exclusive license to certain compounds. Although the UCSF License Agreement was terminated in June 2021, certain of its terms survived, including one calling for a payment that would become due to UCSF upon the occurrence of a change of control or an initial public offering of BBOT, as those events are contractually defined in the UCSF License Agreement (the “Indexed Milestone Payment”). In April 2025, UCSF sent an email to BBOT, followed by a letter dated June 16, 2025, stating that, in the future, the Indexed Milestone Payment in an amount less than $5.0 million will become due on an unspecified date following the Closing Date of the Business Combination Agreement. BBOT disagrees with UCSF’s interpretation of the terminated UCSF License Agreement and believes that no such payment will be due now or in the future. Item 1A. Risk Factors. Investing in our common stock involves a high degree of risk. You should carefully read and consider all of the risks described below, as well as the other information in this Form 10-Q, including our financial statements and the related notes and the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and in other documents we file with the SEC when evaluating our business. The occurrence of any of the events or developments described below could harm our business, financial condition, results of operations and growth prospects. Unless otherwise indicated, references to our business being harmed in these risk factors will include harm to our business, reputation, financial condition, results of operations and future prospects. In such an event, the market price of our common stock could decline, and you may lose all or part of your investment. The risks described below are not intended to be exhaustive and are not the only risks that we face. Additional risks and uncertainties not presently known to us or that we currently deem immaterial also may impair our business operations and the market price of our common stock. Summary of Risk Factors • BBOT has a limited operating history, has not completed any clinical trials, has no products approved for commercial sale and has not generated any revenue, which may make it difficult for investors to evaluate BBOT’s current business and likelihood of success and viability. • BBOT’s ability to generate revenue and achieve profitability depends significantly on its ability to achieve its objectives relating to the discovery, development and commercialization of its product candidates. • BBOT may require additional capital to finance its operations. If BBOT is unable to raise such capital when needed, or on acceptable terms, BBOT may be forced to delay, reduce or eliminate one or more of its research and drug development programs, future commercialization efforts, product development or other operations. • BBOT’s preclinical studies and clinical trials may fail to adequately demonstrate the safety and efficacy of any of its product candidates, which would prevent or delay development, regulatory approval and commercialization. • Any delays in the commencement or completion, or any termination or suspension, of BBOT’s current, planned or future clinical trials could result in increased costs to BBOT, delay or limit BBOT’s ability to generate revenue and adversely affect BBOT’s commercial prospects. • The outcome of preclinical testing and early clinical trials may not be predictive of the success of later clinical trials, and the results of BBOT’s clinical trials may not satisfy the requirements of the FDA, EMA or other comparable foreign regulatory authorities. • The regulatory approval processes of the FDA, EMA and other comparable foreign regulatory authorities are lengthy, time consuming and inherently unpredictable. If BBOT is ultimately unable to obtain regulatory approval of its product candidates, BBOT will be unable to generate product revenue and its business will be substantially harmed. • BBOT’s product candidates may cause significant adverse events, toxicities or other undesirable adverse events when used alone or in combination with other approved products or investigational new drugs that may result in a safety profile that could prevent regulatory approval, prevent market acceptance, limit their commercial potential or result in significant negative consequences. • BBOT currently relies on third parties to supply and manufacture preclinical and clinical drug supplies, and BBOT intends to rely on third parties to produce commercial supplies of any approved product, which increases the risk that BBOT will not have sufficient quantities of these product candidates or products or such quantities at an acceptable cost, which could delay, prevent 38 Table of Contents or impair BBOT’s development or commercialization efforts. • BBOT faces substantial competition which may result in others discovering, developing or commercializing products before or more successfully than BBOT does. • Any product candidates BBOT develops may become subject to unfavorable third-party coverage and reimbursement practices, as well as pricing regulations. • BBOT’s business entails a significant risk of product liability and if BBOT is unable to obtain sufficient insurance coverage such inability could have an adverse effect on BBOT’s business and financial condition. • Obtaining and maintaining regulatory approval of BBOT’s product candidates in one jurisdiction does not mean that BBOT will be successful in obtaining regulatory approval of its product candidates in other jurisdictions. • BBOT may seek certain designations for its product candidates, including Breakthrough Therapy, Fast Track and Priority Review in the U.S., and PRIME (priority medicines) in the EU, but BBOT might not receive such designations, and even if BBOT does, such designations may not lead to a faster development or regulatory review or approval process. • BBOT is or may become subject to stringent privacy laws, information security laws, regulations, policies and contractual obligations related to data privacy and security and changes in such laws, regulations, policies, contractual obligations and failure to comply with such requirements could subject BBOT to significant fines and penalties, which may have a material adverse effect on BBOT’s business, financial condition or results of operations. • BBOT’s success is highly dependent on BBOT’s ability to attract, hire and retain highly skilled executive officers and employees, and BBOT may experience difficulties in managing the future growth of BBOT’s organization. • If BBOT is unable to obtain, maintain and enforce patent protection for its technology and product candidates, or if the scope of the patent protection obtained is not sufficiently broad, BBOT’s competitors could develop and commercialize technology and products similar or identical to BBOT’s, and BBOT’s ability to successfully develop and commercialize its technology and product candidates may be adversely affected. • Patent terms may not protect BBOT’s competitive position for an adequate amount of time. • BBOT may become involved in lawsuits to protect or enforce its patent or other intellectual property rights, which could be expensive, time-consuming and unsuccessful. • BBOT relies on third parties to conduct its preclinical studies and clinical trials, and those third parties may not perform satisfactorily, including failing to meet deadlines for the completion of such trials, research and studies. • There may not be an active trading market for our Common Stock, which may make it difficult to sell shares of our Common Stock. • Future sales, or the perception of future sales, by the Company or its stockholders in the public market could cause the market price for the Company’s securities to decline. • BBOT has in the past identified a material weakness in its internal controls over financial reporting. If BBOT identifies additional material weaknesses in the future or otherwise fails to maintain effective internal controls over financial reporting and disclosure controls and procedures, the accuracy and timeliness of its financial and operating reporting may be adversely affected, and confidence in its operations and disclosures may be lost. • BBOT has increased costs as a result of operating as a public company, and our management devotes substantial time to related compliance initiatives. • We are currently in a period of economic uncertainty and capital markets disruption, which has been significantly impacted by a new U.S. presidential administration and accompanying regulatory activities and economic policies and events related thereto, ongoing military conflicts and geopolitical instability and inflation and interest rates. 39 Table of Contents Risks Related to BBOT’s Financial Position and Need for Additional Capital BBOT has a limited operating history, has not completed any clinical trials, has no products approved for commercial sale and has not generated any revenue, which may make it difficult for investors to evaluate BBOT’s current business and likelihood of success and viability. BBOT is a biopharmaceutical company with a limited operating history upon which investors can evaluate its business and prospects. BBOT was incorporated in August 2016 and commenced significant operations as an independent entity starting in May 2024, has never completed a clinical trial, has no products approved for commercial sale and has never generated any revenue. Drug development is a highly uncertain undertaking and involves a substantial degree of risk. To date, BBOT has devoted substantially all of its resources to research and development activities, including with respect to BBO-8520, BBO-10203 and BBO-11818, and its discovery programs, business planning, establishing and maintaining its intellectual property portfolio, hiring personnel, raising capital and providing general and administrative support for these operations. BBOT has not yet demonstrated its ability to successfully complete clinical trials, obtain marketing approvals, manufacture a commercial-scale product or arrange for a third party to do so on its behalf, or conduct sales and marketing activities necessary for successful product commercialization. As a result, it may be more difficult for investors to evaluate BBOT’s likelihood of success and viability. In addition, BBOT may encounter unforeseen expenses, difficulties, complications, delays and other known and unknown factors and risks frequently experienced by biopharmaceutical companies at BBOT’s stage of development in rapidly evolving fields. BBOT also expects that, as BBOT advances its product candidates, BBOT will need to transition from a company with a research and development focus to a company capable of supporting commercial activities. BBOT has not yet demonstrated an ability to successfully overcome such risks and difficulties, or to make such a transition. If BBOT does not adequately address these risks and difficulties or successfully make such a transition, its business will suffer. BBOT has incurred significant net losses in each period since its inception, and expects to continue to incur significant net losses for the foreseeable future. BBOT incurred significant net losses in each reporting period since its inception, has not generated any revenue to date and has financed its operations principally through private placements of securities. BBOT’s net losses were $42.1 million and $22.1 million for the three months ended March 31, 2026 and 2025, respectively, and $134.0 million and $74.3 million for the years ended December 31, 2025 and 2024, respectively. As of March 31, 2026, BBOT had an accumulated deficit of $398.7 million. BBOT has not yet completed any clinical trials. As a result, BBOT expects that it will be several years, if ever, before BBOT generates revenue from product sales. Even if BBOT succeeds in receiving marketing approval for and commercializing one or more product candidates, BBOT expects that it will continue to incur substantial research and development and other expenses in order to discover, develop and market additional potential products. BBOT expects to continue to incur significant and increasing expenses and increasing operating losses for the foreseeable future. The net losses BBOT incurs may fluctuate significantly from quarter to quarter such that a period-to-period comparison of BBOT’s results of operations may not be a good indication of future performance. The size of future net losses will depend, in part, on the pace of development activities and the rate of future growth of expenses and BBOT’s ability to generate revenue. BBOT’s prior losses and expected future losses have had and will continue to have an adverse effect on working capital, BBOT’s ability to fund the development of its product candidates and its ability to achieve and maintain profitability and the performance of its stock. BBOT’s ability to generate revenue and achieve profitability depends significantly on its ability to achieve its objectives relating to the discovery, development and commercialization of its product candidates. BBOT relies on its team’s expertise in chemistry, structure-based drug design, oncology drug development, business development and patient-driven approach to develop its product candidates. BBOT’s business depends significantly on the success of its approach and the development and commercialization of the product candidates that BBOT discovers with this approach. BBOT has no products approved for commercial sale and does not anticipate generating any revenue from product sales for the next several years, if ever. BBOT’s ability to generate revenue and achieve profitability depends significantly on its ability to achieve several objectives, including: • successful and timely completion of preclinical and clinical development of BBO-8520, BBO-10203, BBO-11818 and any future product candidates from BBOT’s discovery program • maintaining current and establishing new relationships with contract research organizations (“CROs”) and clinical sites for the clinical development of BBO-8520, BBO-10203, BBO-11818 and any future product candidates from BBOT’s current or future discovery programs; 40 Table of Contents • timely receipt of marketing approvals from applicable regulatory authorities for any product candidates for which BBOT successfully completes clinical development; • developing an efficient and scalable manufacturing process for BBOT’s product candidates, including the production of finished products that are appropriately packaged for sale if BBOT’s product candidates obtain marketing approvals; • maintaining current and establishing new commercially viable supply and manufacturing relationships with third parties that can provide adequate, in both amount and quality, products and services to support clinical development and meet the market demand for BBOT’s product candidates, if approved; • successful commercial launch following any marketing approval, including the development of a commercial infrastructure, whether in-house or with one or more collaborators; • maintaining an acceptable safety profile following any marketing approval of BBOT’s product candidates; • commercial acceptance of BBOT’s product candidates by patients, the medical community and third- party payors, including the willingness of physicians to use BBOT’s product candidates, if approved, in lieu of (or in conjunction with) other approved therapies; • satisfying any required post-marketing approval commitments to applicable regulatory authorities; • identifying, assessing and developing new product candidates; • obtaining, maintaining and expanding patent protection, trade secret protection and regulatory exclusivity, both in the U.S. and internationally; • defending against third-party interference or infringement claims, if any, with respect to BBOT’s intellectual property rights; • entering into, on favorable terms, any collaboration, licensing or other arrangements that may be necessary or desirable to develop, manufacture or commercialize BBOT’s product candidates; • obtaining coverage and adequate reimbursement by third-party payors for BBOT’s product candidates, if approved; • addressing any competing therapies and technological and market developments; and • attracting, hiring and retaining qualified personnel. BBOT may never be successful in achieving its objectives and, even if it does, may never generate revenue that is significant or large enough to achieve profitability. If BBOT does achieve profitability, BBOT may not be able to sustain or increase profitability on a quarterly or annual basis. BBOT’s failure to become and remain profitable would decrease the value of the company and could impair BBOT’s ability to maintain or further its research and development efforts, raise additional necessary capital, grow its business and continue its operations. BBOT may require additional capital to finance its operations. If BBOT is unable to raise such capital when needed, or on acceptable terms, BBOT may be forced to delay, reduce or eliminate one or more of its research and drug development programs, future commercialization efforts, product development or other operations. Since inception, BBOT has used substantial amounts of cash to fund its operations, and its expenses will increase substantially in the foreseeable future in connection with its ongoing activities, particularly as BBOT continues the research and development of, initiates additional clinical trials of, and seeks marketing approval for, its product candidates. Developing pharmaceutical products, including conducting preclinical studies and clinical trials, is a very time-consuming, expensive and uncertain process that takes years to complete. Even if one or more of BBOT’s product candidates or any future product candidates that BBOT develops is approved for commercial sale, BBOT anticipates incurring significant costs associated with sales, marketing, manufacturing and distribution activities. BBOT’s expenses could increase beyond expectations if BBOT is required by the FDA, the EMA or other regulatory authorities to perform clinical trials or preclinical studies in addition to those that BBOT currently anticipates. Other unanticipated costs may also arise. Because the design and outcome of BBOT’s clinical trials, including its planned and anticipated clinical trials, are highly uncertain, BBOT cannot reasonably estimate the actual amount of resources and funding that will be necessary to successfully complete the development and commercialization of its product candidates or any future product candidates that it develops. BBOT is currently conducting Phase 1 clinical trials of BBO-8520, BBO-10203 and BBO-11818. BBOT is not permitted to market or promote any product candidate before it receives marketing approval from the FDA, EMA or any comparable foreign regulatory authorities. BBOT is also incurring additional costs associated with operating as a public company. Accordingly, BBOT may need to obtain additional funding in order to continue its operations. 41 Table of Contents BBOT estimates that its existing cash, cash equivalents, short-term marketable securities, and long-term marketable securities as of the date of this report will be sufficient to enable it to fund its operating expenses and capital expenditure requirements into 2028. Advancing the development of BBO-8520, BBO-10203 and BBO-11818 and BBOT’s discovery programs will require a significant amount of capital. BBOT’s existing cash, cash equivalents and marketable securities will not be sufficient to fund all of BBOT’s product candidates through regulatory approval, and BBOT may need to raise additional capital to complete the development and commercialization of its product candidates. BBOT’s estimate as to how long it expects its existing cash, cash equivalents and marketable securities to fund its operations does not include potential product revenue and is based on assumptions that may prove to be wrong, and BBOT could use its available capital resources sooner than currently expected. Changing circumstances, some of which may be beyond BBOT’s control, could cause BBOT to consume capital significantly faster than currently anticipated, and BBOT may need to seek additional funds. BBOT may be required to obtain further funding through public or private equity financings, debt financings, collaborative agreements, licensing arrangements or other sources of financing, which may dilute BBOT’s stockholders or restrict its operating activities. BBOT does not have any committed external source of funds. Adequate additional financing may not be available to BBOT on acceptable terms, or at all. BBOT’s ability to raise additional funds may be adversely impacted by general economic conditions, both inside and outside the U.S., including disruptions to, and instability and volatility in, the credit and financial markets in the U.S. and worldwide, including heightened inflation, interest rate and currency rate fluctuations, and economic slowdown or recession as well as concerns related to public health emergencies, natural disasters or geopolitical events, including civil or political unrest or military conflicts. In addition, market instability and volatility, high levels of inflation and interest rate fluctuations may increase BBOT’s cost of financing or restrict BBOT’s access to potential sources of future liquidity. To the extent that BBOT raises additional capital through the sale of equity or convertible debt securities, each investor’s ownership interests will be diluted, and the terms may include liquidation or other preferences that adversely affect each investor’s rights as a stockholder. Debt financing may result in imposition of debt covenants, increased fixed payment obligations or other restrictions that may affect BBOT’s business. If BBOT raises additional funds through upfront payments or milestone payments pursuant to strategic collaborations with third parties, BBOT may have to relinquish valuable rights to its product candidates or grant licenses on terms that are not favorable to BBOT. In addition, BBOT may seek additional capital due to favorable market conditions or strategic considerations even if BBOT believes it has sufficient funds for its current or future operating plans. BBOT’s failure to raise capital as and when needed or on acceptable terms would have a negative impact on its financial condition and its ability to pursue its business strategy, and BBOT may have to delay, reduce the scope of, suspend or eliminate one or more of its research or drug development programs, clinical trials or future commercialization efforts. Risks Related to BBOT’s Product Development, Regulatory Approval and Commercialization BBOT’s future prospects are substantially dependent on the advancement of its product candidates. If BBOT is unable to advance its product candidates through development, obtain regulatory approval and ultimately commercialize such product candidates, or experience significant delays in doing so, BBOT’s business will be materially harmed. BBOT is currently conducting Phase 1 clinical trials of BBO-8520, BBO-10203 and BBO-11818. BBOT’s ability to generate product revenue, which BBOT does not expect will occur for many years, if ever, will depend heavily on the successful clinical development and eventual commercialization of one or more product candidates. BBOT is not permitted to market or promote any product candidate before BBOT receives marketing approval from the FDA, EMA or any comparable foreign regulatory authorities, and BBOT may never receive such marketing approvals. The success of BBOT’s product candidates will depend on several factors, including the following: • successful and timely completion of preclinical studies; • submission of INDs in the U.S. and CTAs and/or comparable applications outside the U.S. for regulatory authority review and agreement to proceed with BBOT’s clinical trials; • successful initiation and completion of clinical trials; • successful and timely patient selection and enrollment in and completion of clinical trials; • maintaining and establishing relationships with CROs and clinical sites for the clinical development of BBOT’s product candidates both in the U.S. and internationally; • maintaining and growing an organization of scientific, medical and other professionals who can develop and commercialize BBOT’s product candidates; 42 Table of Contents • the frequency and severity of adverse events in clinical trials; • obtaining positive data that support demonstration of efficacy, safety and tolerability profiles and durability of effect for BBOT’s product candidates that are satisfactory to the FDA, EMA or any comparable foreign regulatory authority for marketing approval; • the timely receipt of marketing approvals from applicable regulatory authorities; • the timely identification, development and approval of companion diagnostic tests, if required; • the extent of any required post-marketing approval commitments to applicable regulatory authorities; • the maintenance of existing or the establishment of new supply arrangements with third-party drug product suppliers and manufacturers for clinical development and, if approved, commercialization of BBOT’s product candidates; • obtaining and maintaining patent protection, trade secret protection and regulatory exclusivity, both in the U.S. and internationally; • the protection of BBOT’s rights in its intellectual property portfolio; • establishing sales, marketing and distribution capabilities and the successful launch of commercial sales of BBOT’s product candidates if and when approved for marketing, whether alone or in collaboration with others; • maintaining an acceptable safety profile following any marketing approval; • commercial acceptance by patients, the medical community and third-party payors, including the willingness of physicians to use BBOT’s product candidates, if approved, in lieu of (or in conjunction with) other approved therapies; • BBOT’s ability to compete with other therapies; and • BBOT’s ability to address any potential delays resulting from factors related to public health emergencies, natural disasters or geopolitical events. BBOT does not have complete control over many of these factors, including certain aspects of preclinical and clinical development and the regulatory submission process, potential threats to BBOT’s intellectual property rights and the manufacturing, marketing, distribution and sales efforts of any future collaborator. If BBOT is not successful with respect to one or more of these factors in a timely manner or at all, BBOT could experience significant delays or an inability to successfully commercialize any product candidates from its lead programs, which would materially harm its business. If BBOT does not receive marketing approvals for such product candidates, BBOT may not be able to continue its operations. BBOT’s preclinical studies and clinical trials may fail to adequately demonstrate the safety and efficacy of any of its product candidates, which would prevent or delay development, regulatory approval and commercialization. Before obtaining marketing approval from the FDA, EMA or other comparable foreign regulatory authorities for the sale of BBOT’s product candidates, BBOT must demonstrate through lengthy, complex and expensive preclinical studies and clinical trials that its product candidates are both safe and effective for use in each target indication. Preclinical and clinical testing is expensive, difficult to design and implement, can take many years to complete and the ultimate outcome is uncertain. Failure can occur at any time during the preclinical study and clinical trial processes, there is a high risk of failure, and BBOT may never succeed in developing marketable products. BBOT may experience numerous unforeseen events during, or as a result of, clinical trials that could delay or prevent receipt of marketing approval or BBOT’s ability to commercialize its product candidates, including: • failure of BBOT’s product candidates in preclinical studies or clinical trials to demonstrate safety and efficacy; • receipt of feedback from regulatory authorities that requires BBOT to modify the design of its clinical trials; • negative or inconclusive clinical trial results that may require BBOT to conduct additional clinical trials or abandon certain research, discovery and/or drug development programs; • the number of patients required for clinical trials being larger than anticipated, enrollment in these clinical trials being slower than anticipated, particularly if there are other trials enrolling the same or overlapping precisely targeted patient populations, or participants dropping out of these clinical trials at a higher rate than anticipated; • third-party contractors failing to comply with regulatory requirements or meet their contractual obligations to BBOT in a timely manner, or at all; 43 Table of Contents • the suspension or termination of BBOT’s clinical trials for various reasons, including non-compliance with regulatory requirements or a finding that BBOT’s product candidates have undesirable adverse events or other unexpected characteristics or risks; • the cost of clinical trials of BBOT’s product candidates being greater than anticipated; • the supply or quality of BBOT’s product candidates or other materials necessary to conduct clinical trials of BBOT’s product candidates being insufficient or inadequate; and • regulators revising the requirements for approving BBOT’s product candidates. If BBOT is required to conduct additional clinical trials or other testing of its product candidates beyond those that BBOT is currently contemplating, if BBOT is unable to successfully complete clinical trials of its product candidates or other testing in a timely manner, if the results of these trials or tests are not positive or are only modestly positive or if there are safety concerns, BBOT may incur unplanned costs, be delayed in seeking and obtaining marketing approval, if BBOT receives such approval at all, receive more limited or restrictive marketing approval, be subject to additional post-marketing testing requirements or have the drug removed from the market after obtaining marketing approval. BBOT’s discovery and development activities are focused on precision oncology to treat RAS-dependent cancers, which is a rapidly evolving area of science, and the approach BBOT is taking to discover and develop drugs may never lead to approved or marketable products. The discovery and development of precision oncology therapeutics for patients with RAS-dependent cancers is an emerging field, and the scientific discoveries that form the basis for BBOT’s efforts to discover and develop product candidates are evolving. The scientific evidence to support the feasibility of developing product candidates based on these discoveries is both preliminary and limited. Although BBOT believes, based on BBOT’s preclinical work and clinical trials to date, that BBOT’s product candidates can inhibit RAS, clinical results may not confirm this hypothesis or may only confirm it for certain tumor types. The patient populations for BBOT’s product candidates are limited to those with KRAS and PI3Ka mutations and HER2 amplification and may not be completely defined but are substantially smaller than the general treated cancer population, and BBOT will need to screen and identify these targeted patients. Successful identification of patients is dependent on several factors, including evaluation of patient biopsies and blood samples, which may require the use of companion diagnostic tests. Furthermore, even if BBOT is successful in identifying patients, BBOT cannot be certain that the resulting patient populations for each mutation will be large enough to allow BBOT to successfully obtain approval for each mutation type and commercialize BBOT’s product candidates and achieve profitability. BBOT does not know if its approach of focusing on treating patients with RAS-dependent cancers will be successful, and if its approach is unsuccessful, BBOT’s business will suffer. Any delays in the commencement or completion, or any termination or suspension, of BBOT’s current, planned or future clinical trials could result in increased costs to BBOT, delay or limit BBOT’s ability to generate revenue and adversely affect BBOT’s commercial prospects. Before BBOT can initiate clinical trials of any product candidate in any indication, BBOT must submit the results of preclinical studies to the FDA, EMA or other comparable foreign regulatory authorities along with other information, including information about the product candidate’s chemistry, manufacturing and controls and its proposed clinical trial protocol, as part of an IND or similar regulatory submission under which BBOT must receive authorization to proceed with clinical development. The FDA, EMA or other comparable foreign regulatory authorities may require BBOT to conduct additional preclinical studies for any product candidate before they allow BBOT to initiate clinical trials under any IND, CTA or comparable application which may lead to additional delays and increase the costs of BBOT’s preclinical development programs. Before obtaining marketing approval from the FDA of BBO-8520, BBO-10203, BBO-11818 or of any other future product candidate in any indication, BBOT must conduct extensive clinical studies to demonstrate safety and efficacy. Clinical testing is expensive, time consuming and uncertain as to outcome. In addition, BBOT expects to rely in part on preclinical, clinical and quality data generated by BBOT’s CROs and other third parties for regulatory submissions for BBOT’s product candidates. While BBOT has agreements governing these third parties’ services, BBOT has limited influence over their actual performance. If these third parties do not make data available to BBOT, or, if applicable, make regulatory submissions in a timely manner, in each case pursuant to BBOT’s agreements with them, BBOT’s development programs may be significantly delayed and BBOT may need to conduct additional studies or collect additional data independently. In either case, BBOT’s development costs would increase. BBOT is currently conducting Phase 1 clinical trials of BBO-8520, BBO-10203 and BBO-11818. An IND submission must become effective prior to initiating any clinical trials in the U.S. for any of BBOT’s future product candidates. 44 Table of Contents BBOT could also encounter delays if a clinical trial is suspended or terminated by BBOT, by the independent institutional review board (“IRB”) or independent ethics committee (“IEC”) of the institutions in which such trials are being conducted, by a data safety monitoring board for such trial or by the FDA or foreign regulatory authorities. Such authorities may impose such a suspension or termination due to a number of factors, including failure to conduct the clinical trial in accordance with regulatory requirements or BBOT’s clinical protocols, inspection of the clinical trial operations or trial site by the FDA or foreign regulatory authorities resulting in the imposition of a clinical hold, unforeseen safety issues or adverse events, failure to demonstrate a benefit from using a pharmaceutical, changes in governmental regulations or administrative actions or lack of adequate funding to continue the clinical trial. In addition, changes in regulatory requirements and policies may occur, and BBOT may need to amend clinical trial protocols to comply with these changes. Amendments may require BBOT to resubmit its clinical trial protocols to IRBs/IECs for reexamination, which may impact the costs, timing or successful completion of a clinical trial. Further, if BBOT is slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies governing clinical trials, BBOT’s development plans may be impacted. Certain of BBOT’s current or future scientific advisors or consultants who receive compensation from BBOT may become investigators for BBOT’s future clinical trials. Under certain circumstances, BBOT may be required to report some of these relationships to the FDA. Although BBOT expects any such relationships to be within the FDA’s guidelines, the FDA may conclude that a financial relationship between BBOT and a principal investigator has created a conflict of interest or otherwise affected interpretation of the study. The FDA may therefore question the integrity of the data generated at the applicable clinical trial site and the utility of the clinical trial itself may be jeopardized. This could result in a delay in approval, or rejection, of BBOT’s marketing applications by the FDA and may ultimately lead to the denial of marketing approval of BBOT’s product candidates. If BBOT experiences delays in the completion of, or any termination or suspension of, any clinical trial of any product candidate, the commercial prospects of such product candidate will be harmed, and BBOT’s ability to generate product revenue will be delayed. Moreover, any delays in completing BBOT’s clinical trials will increase BBOT’s costs, slow down BBOT’s development and approval process and jeopardize BBOT’s ability to commence product sales and generate revenue, which may harm BBOT’s business, financial condition, results of operations and prospects significantly. The outcome of preclinical testing and early clinical trials may not be predictive of the success of later clinical trials, and the results of BBOT’s clinical trials may not satisfy the requirements of the FDA, EMA or other comparable foreign regulatory authorities. BBOT will be required to demonstrate with substantial evidence through well-controlled clinical trials that BBOT’s product candidates are safe and effective for use in the target population before BBOT can seek marketing approvals for their commercial sale. Preclinical and clinical testing is expensive and can take many years to complete, and its outcome is inherently uncertain. Failure can occur at any time during the preclinical study and clinical trial processes; there is a high risk of failure and BBOT may never succeed in developing marketable products. The results of preclinical studies may not be predictive of the results of clinical trials of BBOT’s product candidates, and the results of early clinical trials may not be predictive of the results of later-stage clinical trials. Although product candidates may demonstrate promising results in preclinical studies and early clinical trials, they may not prove to be safe or effective in subsequent clinical trials. Favorable results from certain animal studies may not accurately predict the results of other animal studies or of human trials, due to the inherent biologic differences in species, the differences between testing conditions in animal studies and human trials, and the particular goals, purposes, and designs of the relevant studies and trials. Similarly, certain of BBOT’s hypotheses regarding the potential clinical and therapeutic benefits of its product candidates compared to other approved products and product candidates or molecules in development are based on observations from the preclinical studies and early clinical trials that BBOT has completed, and results from such preclinical studies and early clinical trials are not necessarily predictive of the results of later preclinical studies or clinical trials. There is typically an extremely high rate of attrition from the failure of product candidates proceeding through preclinical studies and clinical trials. Product candidates in later stages of clinical trials may fail to show the desired safety and efficacy profile despite having progressed through preclinical studies and initial clinical trials. Likewise, early, smaller-scale clinical trials may not be predictive of eventual safety or effectiveness in large-scale pivotal clinical trials. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and many companies that have believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain marketing approval of their drugs. A number of companies in the biopharmaceutical industry have suffered significant setbacks in advanced clinical trials due to lack of efficacy, insufficient durability of efficacy or unacceptable safety issues, notwithstanding promising results in earlier trials. Most product candidates that commence preclinical studies and clinical trials are never approved as products. The development of BBOT’s product candidates and its stock price may also be impacted by inferences, whether correct or not, that are drawn between the success or failure of preclinical studies or clinical trials of BBOT’s competitors or other companies in the biopharmaceutical industry, in addition to BBOT’s own preclinical studies and clinical trials. 45 Table of Contents In some instances, there can be significant variability in safety and efficacy results between different clinical trials of the same product candidate due to numerous factors, including changes in trial protocols, differences in size and type of the patient populations, differences in and adherence to the dose and dosing regimen and other trial protocols and the rate of dropout among clinical trial participants. Patients treated with BBOT’s product candidates may also be undergoing surgical, radiation and chemotherapy treatments and may be using other approved products or investigational new drugs, which can cause adverse events that are unrelated to BBOT’s product candidates. As a result, assessments of efficacy can vary widely for a particular patient, and from patient to patient and site to site within a clinical trial. This subjectivity can increase the uncertainty of, and adversely impact, BBOT’s clinical trial outcomes. Any preclinical studies or clinical trials that BBOT conducts may not demonstrate the safety and efficacy necessary to obtain regulatory approval to market BBOT’s product candidates. If the results of BBOT’s ongoing or future preclinical studies and clinical trials are inconclusive with respect to the safety and efficacy of BBOT’s product candidates, if BBOT does not meet the clinical endpoints with statistical and clinically meaningful significance, or if there are safety concerns associated with BBOT’s product candidates, BBOT may be prevented or delayed in obtaining marketing approval for such product candidates. BBOT does not know whether any clinical trials BBOT conducts will demonstrate consistent or adequate efficacy and safety sufficient to obtain approval to market any of BBOT’s product candidates. In addition to BBO-8520, BBO-10203 and BBO-11818, BBOT’s prospects depend in part upon discovering, developing and commercializing additional product candidates from BBOT’s discovery programs, which may fail in development or suffer delays that adversely affect their commercial viability. BBOT’s future operating results are dependent on its ability to successfully discover, develop, obtain regulatory approval for and commercialize BBO-8520, BBO-10203 and BBO-11818 and future product candidates from BBOT’s discovery programs. A research candidate can unexpectedly fail at any stage of development. The historical failure rate for research candidates is high due to risks relating to safety, efficacy, clinical execution, changing standards of medical care and other unpredictable variables. The results from preclinical testing or early clinical trials of a product candidate may not be predictive of the results that will be obtained in later stage clinical trials of the product candidate. The success of other research candidates that BBOT may develop will depend on many factors, including the following: • generating sufficient data to support the initiation or continuation of preclinical studies and clinical trials; • obtaining regulatory permission to initiate clinical trials; • contracting with the necessary parties to conduct clinical trials; • successful enrollment of patients in, and the completion of, clinical trials on a timely basis; • the timely manufacture of sufficient quantities of a product candidate for use in clinical trials; • adverse events in clinical trials; and • addressing any delays resulting from factors related to public health emergencies, natural disasters or geopolitical events. Even if BBOT successfully advances any research candidates into preclinical and clinical development, their success will be subject to all of the preclinical, clinical, regulatory and commercial risks described elsewhere in this “Risk Factors” section. Accordingly, there can be no assurance that BBOT will ever be able to discover, develop, obtain regulatory approval of, commercialize or generate significant revenue from any product candidates. BBOT’s approach to the discovery and development of product candidates is unproven, and BBOT may not be successful in its efforts to use and expand its approach to build a pipeline of product candidates with commercial value. A key element of BBOT’s strategy, which is unproven, is to use and expand BBOT’s expertise in chemistry, structure-based drug design and patient-driven approach to build a pipeline of product candidates and progress these product candidates through clinical development. Although BBOT’s research and development efforts to date have resulted in the discovery of and initiation of clinical development of BBO-8520, BBO-10203 and BBO-11818, such product candidates and any other product candidates BBOT may develop may not be determined to be safe or effective as cancer therapeutics, and BBOT may not be able to develop any other product candidates. For example, the potential product candidates that BBOT has identified or identifies in the future may not generate acceptable clinical data, including as a result of being shown to have unacceptable toxicity or other characteristics that indicate that they are unlikely to be product candidates that will receive marketing approval from the FDA, EMA or other regulatory authorities or achieve market acceptance. If BBOT does not successfully develop and commercialize product candidates, BBOT will not be able to generate product revenue in the future, which would result in significant harm to BBOT’s financial position and adversely affect its business. 46 Table of Contents The regulatory approval processes of the FDA, EMA and other comparable foreign regulatory authorities are lengthy, time consuming and inherently unpredictable. If BBOT is ultimately unable to obtain regulatory approval of its product candidates, BBOT will be unable to generate product revenue and its business will be substantially harmed. Obtaining approval by the FDA, EMA and other comparable foreign regulatory authorities is unpredictable, typically takes many years following the commencement of clinical trials and depends upon numerous factors, including the type, complexity and novelty of the product candidates involved. In addition, approval policies, regulations or the type and amount of clinical data necessary to gain approval may change during the course of a product candidate’s clinical development and may vary among jurisdictions, which may cause delays in the approval or the decision not to approve an application. Regulatory authorities have substantial discretion in the approval process and may refuse to accept any application or may decide that BBOT’s data are insufficient for approval and require additional preclinical, clinical or other data. In addition, the U.S. Supreme Court’s July 2024 decision to overturn prior established case law giving deference to regulatory agencies’ interpretations of ambiguous statutory language has introduced uncertainty regarding the extent to which FDA’s regulations, policies and decisions may become subject to increasing legal challenges, delays, and/or changes. Even if BBOT eventually completes clinical testing and receives approval for its product candidates, the FDA, EMA and other comparable foreign regulatory authorities may approve BBOT’s product candidates for a more limited indication or a narrower patient population than BBOT originally requested or may impose other prescribing limitations or warnings that limit the product candidate’s commercial potential. Even if approved, BBOT may be required to conduct additional studies to or obtained, regulatory approval for any product candidate, and it is possible that none of BBOT’s product candidates will ever obtain regulatory approval. Further, development of BBOT’s product candidates and/or regulatory approval may be delayed for reasons beyond its control. Applications for BBOT’s product candidates could fail to receive regulatory approval for many reasons, including the following: • the FDA, EMA or other comparable foreign regulatory authorities may disagree with the design, implementation or results of BBOT’s clinical trials; • the FDA, EMA or other comparable foreign regulatory authorities may determine that BBOT’s product candidates are not safe and effective, are only moderately effective or have undesirable or unintended adverse events, toxicities or other characteristics that preclude BBOT obtaining marketing approval or prevent or limit commercial use; • the population studied in the clinical trial may not be sufficiently broad or representative to assure efficacy and safety in the full population for which BBOT seeks approval; • the FDA, EMA or other comparable foreign regulatory authorities may disagree with BBOT’s interpretation of data from preclinical studies or clinical trials; • the clinical data of the clinical trial may fail to meet the level of statistical significance required to obtain approval of BBOT’s product candidates by the FDA, EMA or other comparable foreign regulatory authorities; • BBOT may be unable to demonstrate to the FDA, EMA or other comparable foreign regulatory authorities that BBOT’s product candidates’ risk-benefit ratios for their proposed indications are acceptable; • the FDA, EMA or other comparable foreign regulatory authorities may fail to approve the manufacturing processes, test procedures and specifications or facilities of third-party manufacturers with which BBOT contracts for clinical and commercial supplies; • the FDA, EMA or other comparable regulatory authorities may fail to approve companion diagnostic tests required for BBOT’s product candidates; • BBOT may not obtain or maintain adequate funding to complete its clinical trials in a manner that is satisfactory to the FDA, EMA or other comparable foreign regulatory authorities; and • the approval policies or regulations of the FDA, EMA or other comparable foreign regulatory authorities may significantly change in a manner rendering BBOT’s clinical data insufficient for approval. This lengthy approval process, as well as the unpredictability of the results of clinical trials, may result in BBOT failing to obtain regulatory approval to market any of its product candidates, which would significantly harm BBOT’s business, results of operations and prospects. 47 Table of Contents BBOT may not be able to submit INDs, CTAs or comparable applications to commence clinical trials on the timelines BBOT expects, and even if BBOT is able to, the FDA, EMA or any comparable foreign regulatory authority may not permit BBOT to proceed. BBOT’s research and development efforts to date have resulted in the initiation of clinical development of BBO-8520, BBO-10203 and BBO-11818. BBOT may not be able to submit INDs for any future product candidates it may identify on the timelines it expects, or such submissions may not take effect on the timeline that BBOT anticipates, or at all. For example, BBOT may experience manufacturing delays or other delays with IND-enabling studies. Moreover, BBOT cannot be sure that submission of an IND will result in the FDA allowing clinical trials to begin, or that, once begun, issues will not arise that could cause BBOT or regulatory authorities to suspend or terminate clinical trials. Additionally, even if the FDA agrees with the design and implementation of the clinical trials set forth in an IND, BBOT cannot guarantee that the FDA will not change its requirements in the future. These considerations also apply to new clinical trials BBOT may submit as amendments to existing INDs or to a new IND. Any failure to submit INDs, CTAs or comparable applications on the timelines BBOT expects or to obtain regulatory approvals for BBOT’s planned clinical trials may prevent BBOT from initiating or completing its clinical trials or commercializing its product candidates on a timely basis, if at all. BBOT’s product candidates may cause significant adverse events, toxicities or other undesirable adverse events when used alone or in combination with other approved products or investigational new drugs that may result in a safety profile that could prevent regulatory approval, prevent market acceptance, limit their commercial potential or result in significant negative consequences. If BBOT’s product candidates are associated with undesirable adverse events or have unexpected characteristics in preclinical studies or clinical trials when used alone or in combination with other approved products or investigational new drugs, BBOT may need to interrupt, delay or abandon their development or limit development to more narrow uses or subpopulations in which the undesirable adverse events or other characteristics are less prevalent, less severe or more acceptable from a risk-benefit perspective. Treatment-related adverse events could also affect patient recruitment or the ability of enrolled subjects to complete the trial or result in potential product liability claims. Any of these occurrences may prevent BBOT from achieving or maintaining market acceptance of the affected product candidate and may harm BBOT’s business, financial condition and prospects significantly. There have been, and it is likely that there will be additional, adverse events associated with the use of BBOT’s product candidates as is typically the case with oncology drugs. Results of BBOT’s studies or trials could reveal a high and unacceptable severity and prevalence of these or other adverse events. In such an event, BBOT’s trials could be suspended or terminated and the FDA, EMA or comparable foreign regulatory authorities could order BBOT to cease further development of or deny approval of BBOT’s product candidates for any or all targeted indications. Drug-related adverse events could also affect patient recruitment or the ability of enrolled patients to complete the trial or result in potential product liability claims. Any of these occurrences may harm BBOT’s business, financial condition and prospects significantly. In addition, BBOT’s product candidates may be used in populations for which safety concerns may be particularly scrutinized by regulatory authorities. BBOT’s product candidates may be studied in combination with other therapies, which may exacerbate adverse events associated with the therapy. Patients treated with BBOT’s product candidates may also be undergoing surgical, radiation and chemotherapy treatments, which can cause adverse events that are unrelated to BBOT’s product candidates but may still impact the success of BBOT’s clinical trials. The inclusion of critically ill patients in BBOT’s clinical trials may result in deaths or other adverse medical events due to other therapies or medications that such patients may be using or due to the gravity of such patients’ illnesses. If significant adverse events are observed in any of BBOT’s current or future clinical trials, BBOT may have difficulty recruiting patients to the clinical trials, patients may drop out of BBOT’s trials, or BBOT may be required to abandon the trials or its development efforts of that product candidate altogether. BBOT, the FDA, EMA, other comparable foreign regulatory authorities or an IRB may suspend clinical trials of a product candidate at any time for various reasons, including a belief that subjects in such trials are being exposed to unacceptable health risks or adverse events. Some potential therapeutics developed in the biotechnology industry that initially showed therapeutic promise in early-stage trials have later been found to cause adverse events that prevented their further development. Even if the adverse events do not preclude the product candidate from obtaining or maintaining marketing approval, undesirable adverse events may inhibit market acceptance due to its tolerability versus other therapies. Any of these developments could materially harm BBOT’s business, financial condition and prospects. Further, if any of BBOT’s product candidates obtain marketing approval, toxicities associated with such product candidates previously not seen during clinical testing may also develop after such approval and lead to a requirement to conduct additional clinical safety trials, additional contraindications, warnings and precautions being added to the drug label, significant restrictions on the use of the product or the withdrawal of the product from the market. BBOT cannot predict whether its product candidates will cause toxicities in humans that would preclude or lead to the revocation of regulatory approval based on preclinical studies or early-stage clinical trials. 48 Table of Contents Interim, preliminary and topline data from BBOT’s preclinical studies and clinical trials that BBOT announces or publishes from time to time may change as more data become available and are subject to audit and verification procedures that could result in material changes in the final data. BBOT has disclosed interim preliminary or topline data from its clinical trials and expects to continue to make such disclosures in the future. These interim updates are anticipated to be based on preliminary analyses of then-available data, and the results and related findings and conclusions may be subject to change following a more comprehensive review of the data related to the particular study or trial. For example, BBOT may report responses in certain patients that are unconfirmed at the time and which do not ultimately result in confirmed responses to treatment after follow-up evaluations. BBOT also makes assumptions, estimations, calculations and conclusions as part of its analyses of data, and BBOT may not have received or had the opportunity to fully and carefully evaluate all data. As a result, the interim, preliminary or topline results that BBOT reports may differ from future results of the same studies or trials, or different conclusions or considerations may qualify such results, once additional data have been received and fully evaluated. Interim, preliminary and topline data also remain subject to audit and verification procedures that may result in the final data being materially different from the interim, preliminary or topline data previously published. As a result, interim, preliminary and topline data should be viewed with caution until the final data are available. In addition, BBOT may report interim analyses of only certain endpoints rather than all endpoints. Interim, preliminary and topline data from clinical trials are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available. Adverse changes between interim, preliminary or topline data and final data could significantly harm BBOT’s business and prospects. Further, additional disclosure of interim, preliminary or topline data by BBOT or by its competitors in the future could result in volatility in the price of BBOT’s common stock. In addition, the information BBOT chooses to publicly disclose regarding a particular study or trial is typically selected from a more extensive amount of available information. Investors may not agree with what BBOT determines is the material or otherwise appropriate information to include in its public disclosures, and any information BBOT determines not to disclose may ultimately be deemed significant with respect to future decisions, conclusions, views, activities or otherwise regarding a particular product candidate or BBOT’s business. If the interim, preliminary or topline data that BBOT reports differs from late, final or actual results, or if others, including regulatory authorities, disagree with the conclusions reached, BBOT’s ability to obtain approval for, and commercialize, any of its product candidates may be harmed, which could harm BBOT’s business, financial condition, results of operations and prospects. If BBOT experiences delays or difficulties in the enrollment or maintenance of patients in clinical trials, BBOT’s regulatory submissions or receipt of necessary marketing approvals could be delayed or prevented. BBOT may not be able to initiate or continue clinical trials for its product candidates if BBOT is unable to locate and enroll a sufficient number of eligible patients to participate in these trials to such trial’s conclusion as required by the FDA, EMA or other comparable foreign regulatory authorities. Patient enrollment is a significant factor in the timing of clinical trials. BBOT’s ability to enroll eligible patients may be limited or may result in slower enrollment than anticipated. BBOT utilizes profiling of patients’ tumors to identify suitable patients for recruitment into its clinical trials. For these clinical trials, BBOT seeks patients who carry specific gene mutation or amplification that its product candidates are designed to precisely target. BBOT cannot be certain (i) how many patients will have the requisite mutation or amplification that qualify for inclusion in its clinical trials, (ii) that the number of patients enrolled in each program will suffice for regulatory approval or (iii) if regulatory approval is obtained, whether each specific mutation or amplification will be included in the approved drug label. Additionally, BBOT faces competition, including from large pharmaceutical companies with significantly more resources than BBOT, for enrollment of BBOT’s targeted patient populations, which may impact BBOT’s ability to successfully recruit patients for its clinical trials. If BBOT’s strategies for patient identification and enrollment prove unsuccessful, BBOT may have difficulty enrolling or maintaining patients appropriate for its product candidates. Patient enrollment may be affected if BBOT’s competitors have ongoing clinical trials for programs that are under development for the same indications as BBOT’s product candidates, and patients who would otherwise be eligible for BBOT’s clinical trials instead enroll in clinical trials of its competitors’ programs. Patient enrollment for BBOT’s current or future clinical trials may be affected by other factors, including: • size and nature of the patient population; • severity of the disease under investigation; • availability and efficacy of approved drugs for the disease under investigation; • patient eligibility criteria for the trial in question as defined in the protocol, including biomarker-driven identification and/or certain highly-specific criteria related to stage of disease progression, which may limit the patient populations eligible for BBOT’s clinical trials to a greater extent than competing clinical trials for the same indication that do not have a biomarker-driven patient eligibility criteria; 49 Table of Contents • perceived risks and benefits of the product candidate under study; • clinicians’ and patients’ perceptions as to the potential advantages of the product candidate being studied in relation to other available therapies, including any new products that may be approved or other product candidates being investigated for the indications BBOT is investigating; • clinicians’ willingness to screen their patients for biomarkers to indicate which patients may be eligible for enrollment in BBOT’s clinical trials; • patient referral practices of physicians; • the ability to monitor patients adequately during and after treatment; • proximity and availability of clinical trial sites for prospective patients; and • the risk that patients enrolled in clinical trials will drop out of the trials before completion or, because they may be late-stage cancer patients, will not survive the full terms of the clinical trials. BBOT’s inability to enroll a sufficient number of patients for its clinical trials would result in significant delays or may require BBOT to abandon one or more clinical trials altogether. Enrollment delays in BBOT’s clinical trials may result in increased development costs for its product candidates and jeopardize its ability to obtain marketing approval for the sale of its product candidates. Furthermore, even if BBOT is able to enroll a sufficient number of patients for its clinical trials, BBOT may have difficulty maintaining participation in its clinical trials through treatment and any follow-up periods. BBOT has limited resources and is currently focusing its efforts on the development of BBO-8520, BBO-10203 and BBO-11818 in particular indications and advancing its discovery programs. As a result, BBOT may fail to capitalize on other indications or product candidates that may ultimately have proven to be more profitable. BBOT is currently focusing its resources and efforts on its lead product candidates, BBO-8520 a KRAS inhibitor for KRASG12C NSCLC, BBO-10203 a PI3Kα:RAS breaker for PIK3CAmut BC, HER2amp BC, KRASmut NSCLC, KRASmut PDAC, and KRASmut CRC, and BBO-11818 a Pan-KRAS inhibitor for KRASG12X NSCLC, KRASG12X PDAC, KRASG12X CRC, and on advancing BBOT’s discovery programs. As a result, because BBOT has limited resources, BBOT may forgo or delay pursuit of opportunities for other indications or with other product candidates that may have greater commercial potential. BBOT’s resource allocation decisions may cause BBOT to fail to capitalize on viable commercial products or profitable market opportunities. BBOT’s spending on current and future research and development activities for BBO-8520, BBO-10203 and BBO-11818 and BBOT’s discovery programs may not yield any commercially viable products. If BBOT does not accurately evaluate the commercial potential or target markets for BBO-8520, BBO-10203 and BBO-11818 or any future product candidates identified through BBOT’s discovery programs, BBOT may enter into collaboration, licensing or other strategic arrangements with the effect of relinquishing valuable rights in cases in which it would have been more advantageous for BBOT to retain sole development and commercialization rights. In addition, given the similar approaches being utilized by BBOT’s lead product candidates, negative developments for one candidate in the pipeline may have negative implications for other candidates in the pipeline. BBOT currently relies on third parties to supply and manufacture preclinical and clinical drug supplies, and BBOT intends to rely on third parties to produce commercial supplies of any approved product, which increases the risk that BBOT will not have sufficient quantities of these product candidates or products or such quantities at an acceptable cost, which could delay, prevent or impair BBOT’s development or commercialization efforts. BBOT does not own or operate manufacturing facilities for the production of preclinical, clinical or commercial supplies of the product candidates that BBOT is developing or evaluating in its drug development programs. BBOT has limited personnel with experience in drug manufacturing and lacks the resources and the capabilities to manufacture any of BBOT’s product candidates on a preclinical, clinical or commercial scale. BBOT relies on third parties for supply of its preclinical and clinical drug supplies (including key active pharmaceutical ingredients, or API, drug product, and starting and intermediate materials), and BBOT’s strategy is to outsource to third parties all manufacturing of BBOT’s product candidates and products from preclinical development through clinical trials and commercialization, if any product candidates are approved. 50 Table of Contents In order to conduct clinical trials of product candidates, BBOT will need to have them manufactured in potentially large quantities, particularly for later-stage trials. BBOT’s third-party manufacturers may be unable to successfully increase the manufacturing capacity for any of its clinical drug supplies (including API, drug product, and key starting and intermediate materials) in a timely or cost-effective manner, or at all. In addition, quality issues may arise during scale-up activities and at any other time. If these third-party manufacturers are unable to successfully scale up the manufacture of BBOT’s product candidates in sufficient quality and quantity, the development, testing and clinical trials of that product candidate may be delayed or infeasible, and regulatory approval or commercial launch of that product candidate may be delayed or not obtained. In addition, some of BBOT’s third-party suppliers (including suppliers of key active pharmaceutical ingredients, or API, drug product, and starting and intermediate materials) are currently BBOT’s sole source of supplies and, as a result, an issue with one of these suppliers may more significantly impact or delay BBOT’s development or commercial plans, as discussed further under the risk factor titled, “Some of the third parties upon whom BBOT currently relies for the supply of the active pharmaceutical ingredients, drug product and starting materials used in BBOT’s product candidates are BBOT’s sole source of supply, and the loss of any of these suppliers could delay BBOT’s development efforts and harm BBOT’s business.” BBOT’s use of new third-party manufacturers or suppliers also increases the risk of delays in production or insufficient supplies of BBOT’s product candidates (and the key API, drug product, and starting and intermediate materials for such product candidates) as BBOT transfers its manufacturing technology to these manufacturers or suppliers and as they gain experience manufacturing or producing BBOT’s product candidates (and the key API, drug product, and starting and intermediate materials for these product candidates). Even after a third-party manufacturer has gained significant experience in manufacturing BBOT’s product candidates (or the key API, drug product, and starting and intermediate materials for such product candidates), or even if BBOT believes it has succeeded in optimizing the manufacturing process, there can be no assurance that such manufacturer will supply or produce sufficient quantities of BBOT’s product candidates (or the key API, drug product, and starting and intermediate materials for such product candidates) in a timely manner or continuously over time, or at all. BBOT may be delayed if BBOT needs to change the manufacturing process used by a third party. Further, if BBOT changes an approved manufacturing process, then BBOT may be delayed if the FDA or a comparable foreign authority needs to review the new manufacturing process before it may be used. Reliance on third-party manufacturers for preclinical, clinical and commercial supplies entails risks, including: • reliance on the third party for regulatory compliance and quality assurance; • the possible breach of the manufacturing or master services agreement by the third party; • the possible misappropriation of BBOT’s proprietary information, including trade secrets and know-how; and • the possible termination or non-renewal of the agreement by the third party at a time that is costly or inconvenient for BBOT. While BBOT has entered into master services agreements with its current suppliers under which work is performed on an as-needed basis pursuant to quotations or proposals, BBOT does not currently have any agreements with third-party manufacturers for long-term commercial supply. In the future, BBOT may be unable to enter into agreements with third-party manufacturers for commercial supplies of any of BBOT’s product candidates, or may be unable to do so on acceptable terms. Even if BBOT is able to establish and maintain arrangements with third-party manufacturers for commercial supply, reliance on third-party manufacturers entails risks, including those described above. Third-party manufacturers may not be able to comply with cGMP requirements or similar regulatory requirements outside the United States. BBOT’s failure, or the failure of its third-party manufacturers, to comply with applicable requirements could result in sanctions being imposed on BBOT, including fines, injunctions, civil penalties, delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of product candidates or products, operating restrictions and/or criminal prosecutions, any of which could significantly and adversely affect supplies of BBOT’s product candidates. BBOT’s future product candidates and any products that BBOT may develop may compete with other product candidates and products for access to manufacturing facilities. There are a limited number of manufacturers that operate under cGMP requirements particularly that use chromatography or purification technology necessary for the manufacture of BBO-10203, and that might be capable of manufacturing for BBOT. BBOT is also unable to predict how changing regulatory requirements, global economic conditions or ongoing geopolitical conflicts, trade policy, and related global economic sanctions, or potential global health concerns will affect BBOT’s third-party suppliers and manufacturers. Any negative impact of such matters on BBOT’s third-party suppliers and manufacturers may also have an adverse impact on BBOT’s results of operations or financial condition. For example, in 2024, there was Congressional activity related 51 Table of Contents to interactions with Chinese biopharmaceutical companies, including the introduction of the BIOSECURE Act. Although the BIOSECURE Act has not been passed by Congress, if this bill is re-introduced and is passed, or if similar laws are passed in the future, they would have the potential to restrict the ability of U.S. biopharmaceutical companies like BBOT to purchase services or products from, or otherwise collaborate with, certain Chinese biotechnology companies “of concern” without losing the ability to contract with, or otherwise receive funding from, the U.S. government. Some of BBOT’s sole source suppliers are companies in China, including some named in these bills, and it is possible some of BBOT’s contractual counterparties could be impacted by the legislation described above. If the third parties that BBOT engages to supply any materials or manufacture product for its preclinical tests and clinical trials should cease to continue to do so for any reason, BBOT likely would experience delays in advancing these tests and trials while BBOT identifies and qualifies replacement suppliers or manufacturers, and BBOT may be unable to obtain replacement supplies on terms that are favorable to BBOT or at all. In addition, if BBOT is not able to obtain adequate supplies of its product candidates or the substances used to manufacture them, it will be more difficult for BBOT to develop its product candidates and compete effectively. BBOT’s current and anticipated future dependence upon others for the manufacture of BBOT’s product candidates (or the key API, drug product, and starting and intermediate materials for such product candidates) may adversely affect BBOT’s future profit margins and ability to develop product candidates and commercialize any products that receive marketing approval on a timely and competitive basis. BBOT faces substantial competition which may result in others discovering, developing or commercializing products before or more successfully than BBOT does. The pharmaceutical and biotechnology industries are characterized by rapidly advancing technologies, intense competition and a strong emphasis on proprietary and novel products and product candidates. BBOT’s competitors have developed, are developing or may develop products, product candidates and processes competitive with BBOT’s product candidates. Any product candidates that BBOT successfully develops and commercializes will compete with existing therapies and new therapies that may become available in the future. BBOT believes that a significant number of product candidates are currently under development, and may become commercially available in the future, for the treatment of conditions for which BBOT is currently attempting and may in the future attempt to develop product candidates. In addition, BBOT’s product candidates may need to compete with drugs physicians use off-label to treat the indications for which BBOT seeks approval. This may make it difficult for BBOT to replace existing therapies with BBOT’s product candidates. In particular, there is intense competition in the field of oncology. BBOT has competitors both in the U.S. and internationally, including major multinational pharmaceutical companies, established biotechnology companies, specialty pharmaceutical companies, emerging and start-up companies, universities and other research institutions. BBOT also competes with these organizations to recruit and retain qualified scientific and management personnel, which could negatively affect BBOT’s level of expertise and BBOT’s ability to execute its business plan. BBOT will also face competition in establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, BBOT’s programs. For BBO-8520, there are currently two KRASG12C inhibitors approved by the FDA for use in KRASG12C mutant advanced or metastatic NSCLC. For BBO-10203, there is one PI3Kα inhibitor approved by the FDA for the treatment of HR+ / HER2- advanced or metastatic PIK3CAmut breast cancer. For BBO-11818, there are no pan-KRAS inhibitors approved by the FDA for the treatment of KRASG12X mutant lung, colorectal, or pancreatic cancers. 52 Table of Contents Many of BBOT’s competitors, either alone or with their collaborators, have significantly greater financial resources, established presence in the market, and expertise in research and development, manufacturing, preclinical and clinical testing, obtaining regulatory approvals and reimbursement and marketing approved products than BBOT. Large pharmaceutical and biotechnology companies, in particular, have extensive experience in clinical testing, obtaining regulatory approvals, recruiting patients and manufacturing biotechnology product candidates. These companies also have significantly greater research and marketing capabilities than BBOT and may also have product candidates that have been approved or are in late stages of development, and collaborative arrangements in BBOT’s target markets with leading companies and research institutions. Established pharmaceutical and biotechnology companies may also invest heavily to accelerate discovery and development of novel compounds or to in-license novel compounds that could make the product candidates that BBOT develops obsolete. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies, as well as in acquiring technologies complementary to, or necessary for, BBOT’s programs. As a result of all of these factors, BBOT’s competitors may succeed in obtaining approval from the FDA, EMA or other comparable foreign regulatory authorities or in discovering, developing and commercializing product candidates in BBOT’s field before BBOT does. BBOT’s potential commercial opportunity could be reduced or eliminated if competitors develop and commercialize products that are safer, more effective, have fewer or less severe adverse events, are more convenient, have a broader label, are marketed more effectively, are more widely reimbursed or are less expensive than any products that BBOT may develop. Physicians may be more willing to prescribe competitors’ products for various reasons, and may rely on guidelines related to treatment of patients issued by medical societies, industry groups or other organizations, which may not include, and may never include, BBOT’s products. BBOT’s competitors also may obtain marketing approval from the FDA, EMA or other comparable foreign regulatory authorities for their products more rapidly than BBOT may obtain approval for its product candidates, which could result in competitors establishing a strong market position before BBOT is able to enter the market, or make BBOT’s development and marketing more complicated. Even if the product candidates BBOT develops achieve marketing approval, they may be priced at a significant premium over competitive products if any have been approved by then, resulting in reduced competitiveness. Technological advances or products developed by BBOT’s competitors may render BBOT’s technologies or product candidates obsolete, less competitive or not economical. If BBOT is unable to compete effectively, BBOT’s opportunity to generate revenue from the sale of products BBOT may develop, if approved, could be adversely affected. BBOT’s product candidates may not achieve adequate market acceptance among physicians, patients, healthcare payors and others in the medical community necessary for commercial success. Even if BBOT’s product candidates receive regulatory approval, they may not gain adequate market acceptance among physicians, patients, third-party payors and others in the medical community. The degree of market acceptance of any of BBOT’s approved product candidates will depend on a number of factors, including: • the efficacy and safety profile as demonstrated in clinical trials compared to alternative treatments; • the timing of market introduction of the product candidate as well as competitive products; • the clinical indications for which a product candidate is approved; • restrictions on the use of product candidates in the labeling approved by regulatory authorities, such as boxed warnings or contraindications in labeling, or a Risk Evaluation and Mitigation Strategy (“REMS”), if any, which may not be required of alternative treatments and competitor products; • the potential and perceived advantages of BBOT’s product candidates over alternative treatments; • the cost of treatment in relation to alternative treatments; • the availability of coverage and adequate reimbursement by third-party payors, including government authorities; • willingness of physicians to use BBOT’s product candidates, if approved, in lieu of (or in conjunction with) other approved therapies; • the availability of an approved product candidate for use as a combination therapy; • relative convenience and ease of administration; • the willingness of the target patient population to try new therapies and undergo required diagnostic screening to determine treatment eligibility and of physicians to prescribe these therapies and diagnostic tests; • the effectiveness of sales and marketing efforts; • unfavorable publicity relating to BBOT’s product candidates; and 53 Table of Contents • the approval of other new therapies for the same indications. If any of BBOT’s product candidates are approved but do not achieve an adequate level of acceptance by physicians, hospitals, healthcare payors and patients, BBOT may not generate or derive sufficient revenue from that product candidate and BBOT’s financial results could be negatively impacted. The market opportunities for any product candidates BBOT develops, if approved, may be limited to certain smaller patient subsets and may be smaller than BBOT estimates them to be. When cancer is detected early (referred to as localized disease), conventional treatments, which include chemotherapy, hormone therapy, surgery and radiation therapy and/or selected targeted therapies, may be adequate to cure the patient in many cases. However, once cancer has spread to other areas (advanced or metastatic disease), cancer treatments may not be sufficient to provide a cure but often can significantly prolong life without curing the cancer. First-line therapies designate treatments that are initially administered to patients with advanced or metastatic disease, while second and third-line therapies are administered to patients when the prior therapies lose their effectiveness. The FDA, EMA and other regulatory bodies often approve cancer therapies for a particular line of treatment. Typically, drug approvals are initially granted for use in later lines of treatment, but with additional evidence of significant efficacy from clinical trials, biopharmaceutical companies can successfully seek and gain approval for use in earlier lines of treatment. In most instances, BBOT plans to initially seek approval of BBO-8520, BBO-10203 and BBO-11818 and any other future product candidates for previously treated patients with advanced or metastatic cancer where at least one prior therapy has limited clinical benefit or where tumors have developed resistance to such therapy. For those product candidates that prove to be sufficiently safe and effective, if any, BBOT would potentially expect to seek approval ultimately as a first line therapy. There is no guarantee that BBOT’s product candidates, even if approved for previously treated patients, would be approved for an earlier line of therapy, and prior to any such approvals BBOT may have to conduct additional clinical trials that may be costly, time-consuming and subject to risk. BBOT’s projections of both the number of people who have the cancers BBOT is targeting, as well as the subset of people with these cancers in a position to receive a particular line of therapy and who have the potential to benefit from treatment with BBOT’s product candidates, are based on BBOT’s beliefs and estimates. These estimates have been derived from a variety of sources, including scientific literature, surveys of clinics, patient foundations or market research, and may prove to be incorrect. Further, new data and studies may change the estimated incidence or prevalence of the cancers that BBOT is targeting, especially if new therapies that are approved while BBOT advances its product candidates affect the treatment paradigm and/or the size of the target population. The potentially addressable patient population for BBOT’s product candidates may be limited or may not be amenable to treatment with BBOT’s product candidates. Consequently, even if BBOT’s product candidates are approved, the number of patients that may be eligible for treatment with BBOT’s product candidates may turn out to be much lower than expected. In addition, BBOT has not yet conducted market research to determine how treating physicians would expect to prescribe a product that is approved for multiple tumor types if there are different lines of approved therapies for each such tumor type. Even if BBOT obtains significant market share for its products, if approved, if the potential target populations are small, BBOT may never achieve profitability without obtaining regulatory approval for additional indications. Any product candidates BBOT develops may become subject to unfavorable third-party coverage and reimbursement practices, as well as pricing regulations. Patients rely on insurance coverage by third-party payors (third-party payors include Medicare and Medicaid (government payors) and commercial insurance companies such as Blue Cross Blue Shield, Humana, Cigna, etc.), to pay for products. The availability and extent of coverage and adequate reimbursement by third-party payors, including government health administration authorities, private health coverage insurers, managed care organizations and other third-party payors is essential for most patients to be able to afford expensive treatments. Sales of any of BBOT’s product candidates that receive marketing approval will depend substantially, both in the U.S. and internationally, on the extent to which the costs of such product candidates will be covered and reimbursed by third-party payors. No uniform policy exists for coverage and reimbursement in the U.S. If reimbursement is not available, or is available only to limited levels, BBOT may not be able to successfully commercialize its product candidates. Even if coverage is provided, the approved reimbursement amount may not be high enough to allow BBOT to establish or maintain pricing sufficient to realize an adequate return on BBOT’s investment. Further, it is possible that a third-party payor may consider BBOT’s product candidates as substitutable with competitor products and offer to reimburse patients only for the less expensive competitor product. Coverage and reimbursement may impact the demand for, or the price of, any product candidate for which BBOT obtains marketing approval. If coverage and reimbursement are not available or reimbursement is available only to limited levels, BBOT may not successfully commercialize any product candidate for which BBOT obtains marketing approval. 54 Table of Contents There is significant uncertainty related to third-party payor coverage and reimbursement of newly approved products. In the U.S., for example, principal decisions about reimbursement for new products are typically made by the Center for Medicare & Medicaid Services (“CMS”), an agency within the U.S. Department of Health and Human Services (“HHS”). CMS decides whether and to what extent a new product will be covered and reimbursed under Medicare, and private third-party payors often follow CMS’s decisions regarding coverage and reimbursement to a substantial degree. However, one third-party payor’s determination to provide coverage for a product candidate does not assure that other payors will also provide coverage for the product candidate. As a result, the coverage determination process is often time-consuming and costly. Factors payors consider in determining reimbursement are based on whether the product is: (i) a covered benefit under its health plan; (ii) safe, effective and medically necessary; (iii) appropriate for the specific patient; (iv) cost-effective; and (v) neither experimental nor investigational. This process will require BBOT to provide scientific and clinical support for the use of BBOT’s products to each third-party payor separately, with no assurance that coverage and adequate reimbursement will be applied consistently or obtained in the first instance. As federal and state governments implement additional health care cost containment measures, including measures to lower prescription drug pricing, BBOT cannot be sure that its products, if approved, will be covered by private or public payors, and if covered, whether the reimbursement will be adequate or competitive with other marketed products. Such other actions by federal and state governments and health plans may put additional downward pressure on pharmaceutical pricing and health care costs, which could negatively impact coverage and reimbursement for BBOT’s products if approved, BBOT’s revenue, and its ability to compete with other marketed products and to recoup the costs of its research and development. For further discussion, see “- Current and future legislation may increase the difficulty and cost for BBOT to obtain reimbursement for its product candidates;” and “- The prices of prescription pharmaceuticals in the U.S. and foreign jurisdictions are the subject of considerable legislative and executive actions and could impact the prices BBOT obtains for its products, if and when licensed for marketing.” Increasingly, third-party payors are requiring that drug companies provide them with predetermined discounts from list prices and are challenging the prices charged for medical products. Further, such payors are increasingly challenging the price, examining the medical necessity and reviewing the cost effectiveness of medical product candidates. There may be especially significant delays in obtaining coverage and reimbursement for newly approved drugs. Third-party payors may limit coverage to specific product candidates on an approved list, known as a formulary, which might not include all FDA-approved drugs for a particular indication. BBOT may need to conduct expensive pharmaco-economic studies to demonstrate the medical necessity and cost effectiveness of its products. Nonetheless, BBOT’s product candidates may not be considered medically necessary or cost effective. BBOT cannot be sure that coverage and reimbursement will be available for any product that BBOT commercializes and, if reimbursement is available, what the level of reimbursement will be. In addition, companion diagnostic tests require coverage and reimbursement separate and apart from the coverage and reimbursement for their companion pharmaceutical or products. Similar challenges to obtaining coverage and reimbursement, applicable to pharmaceutical or products, will apply to companion diagnostics. Additionally, if any companion diagnostic provider is unable to obtain reimbursement or is inadequately reimbursed, that may limit the availability of such companion diagnostic, which would negatively impact prescriptions for BBOT’s product candidates, if approved. Outside the U.S., the commercialization of therapeutics is generally subject to extensive governmental price controls and other market regulations, and BBOT believes the increasing emphasis on cost containment initiatives in Europe, Canada and other countries has and will continue to put pressure on the pricing and usage of therapeutics such as BBOT’s product candidates. In many countries, particularly the countries of the EU, medical product prices are subject to varying price control mechanisms as part of national health systems. In these countries, pricing negotiations with governmental authorities can take considerable time after a product receives marketing approval. To obtain reimbursement or pricing approval in some countries, BBOT may be required to conduct a clinical trial that compares the cost-effectiveness of BBOT’s product candidate to other available therapies. In general, product prices under such systems are substantially lower than in the U.S. Other countries allow companies to fix their own prices for products but monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the amount that BBOT is able to charge for its product candidates. Accordingly, in markets outside the U.S., the reimbursement for BBOT’s products may be reduced compared with the U.S. and may be insufficient to generate commercially reasonable revenue and profits. If BBOT is unable to establish or sustain coverage and adequate reimbursement for any product candidates from third-party payors, the adoption of those products and sales revenue will be adversely affected, which, in turn, could adversely affect the ability to market or sell those product candidates, if approved. Coverage policies and third-party payor reimbursement rates may change at any time. Even if favorable coverage and reimbursement status is attained for one or more products for which BBOT receives regulatory approval, less favorable coverage policies and reimbursement rates may be implemented in the future. BBOT’s business entails a significant risk of product liability and if BBOT is unable to obtain sufficient insurance coverage such inability could have an adverse effect on BBOT’s business and financial condition. 55 Table of Contents BBOT’s business exposes BBOT to significant product liability and other risks inherent in the development, testing, manufacturing and marketing of therapeutic treatments. Product liability and other claims or incidents, such as cyber incidents and breaches, could delay or prevent completion of BBOT’s development programs. If BBOT succeeds in marketing products, such claims could result in an FDA, EMA or other regulatory authority investigation of the safety and effectiveness of BBOT’s products, manufacturing processes and facilities or BBOT’s marketing programs. FDA, EMA or other regulatory authority investigations could potentially lead to a recall of BBOT’s products or more serious enforcement action, limitations on the approved indications for which they may be used or suspension or withdrawal of approvals. Regardless of the merits or eventual outcome, liability claims may also result in decreased demand for BBOT’s products, injury to BBOT’s reputation, costs to defend the related litigation, a diversion of management’s time and BBOT’s resources and substantial monetary awards to trial participants or patients. BBOT currently has product liability and other insurance that BBOT believes is appropriate for its stage of development and may need to obtain higher levels prior to advancing BBOT’s product candidates into later stages of development or marketing any of BBOT’s product candidates, if approved. Any insurance BBOT has or may obtain may not provide sufficient coverage against potential liabilities. Furthermore, clinical trial, product liability, and other types of insurance (such as cyber insurance) are becoming increasingly expensive and difficult to obtain. As a result, BBOT may be unable to obtain sufficient insurance at a reasonable cost to protect BBOT against losses caused by product liability or other claims or incidents, including data breach and incidents, that could have an adverse effect on BBOT’s business and financial condition. Certain of BBOT’s product candidates are novel, complex and difficult to manufacture. BBOT could experience manufacturing problems that result in delays in BBOT’s development or commercialization or otherwise harm BBOT’s business. The manufacturing processes BBOT’s third-party contract manufacturing organizations (“CMOs”) use to produce its product candidates are complex, novel and have not been validated for commercial use. Several factors have caused and may cause future production interruptions, including restrictions on certain manufacturing operations and shortages in on-site personnel at BBOT’s CMOs’ manufacturing facilities, equipment malfunctions, facility contamination, raw material shortages or contamination, natural disasters, disruption in utility services, human error or disruptions in the operations of BBOT’s suppliers, including historical disruptions, which could reoccur in connection with any future global pandemic or health emergency. Several of BBOT’s small molecule product candidates are particularly complex and difficult to manufacture, in some cases due to the number of steps required, the process complexity and the toxicity of end or intermediate-stage products. BBOT’s product candidates require processing steps that are more complex than those required for most small molecule drugs. As a result, assays of the finished product may not be sufficient to ensure that the product is consistent from lot-to-lot or will perform in the intended manner. Accordingly, BBOT’s CMOs must employ multiple steps to control the manufacturing process to assure that the process is reproducible and the product candidate is made strictly and consistently in compliance with the process. Problems with the manufacturing process, even minor deviations from the normal process, could result in product defects or manufacturing failures that result in lot failures, product recalls, product liability claims or insufficient inventory to conduct clinical trials or supply commercial markets. BBOT may encounter problems achieving adequate quantities and quality of clinical-grade materials that meet the FDA, the EMA or other applicable standards or specifications with consistent and acceptable production yields and costs. In addition, the FDA, the EMA and other foreign regulatory authorities may require BBOT to submit samples of any lot of any approved product together with the protocols showing the results of applicable tests at any time. Under some circumstances, the FDA, the EMA or other foreign regulatory authorities may require that BBOT not distribute a lot until the agency authorizes its release. Slight deviations in the manufacturing process, including those affecting quality attributes and stability, may result in unacceptable changes in the product that could result in lot failures or product recalls. Lot failures or product recalls could cause BBOT to delay clinical trials, which could be costly to BBOT and otherwise harm BBOT’s business, financial condition, results of operations and prospects. BBOT’s CMOs also may encounter problems hiring and retaining the experienced scientific, quality assurance, quality-control and manufacturing personnel needed to operate BBOT’s manufacturing processes, which could result in delays in production or difficulties in maintaining compliance with applicable regulatory requirements. Any problems in BBOT’s CMOs’ manufacturing process or facilities could result in delays in planned clinical trials and increased costs, and could make BBOT a less attractive collaborator for potential partners, including larger biotechnology companies and academic research institutions, which could limit access to additional attractive development programs. Problems in BBOT’s manufacturing process could also restrict BBOT’s ability to meet potential future market demand for any products that may be approved. Certain of BBOT’s product candidates are under development for the treatment of patient populations with significant comorbidities that may result in deaths or serious adverse or unacceptable side effects and require BBOT to abandon or limit its clinical development activities. 56 Table of Contents Patients in certain of BBOT’s ongoing and planned clinical trials of product candidates in genetically driven cancers, as well as patients who may undergo treatment with other product candidates that BBOT may develop, may also receive chemotherapy, radiation, and/or other high dose or myeloablative treatments in the course of treatment of their disease, and may therefore experience side effects or AEs, including death, that are unrelated to BBOT’s product candidates. While these side effects or AEs may be unrelated to BBOT’s product candidates, they may still affect the success of BBOT’s clinical trials. The inclusion of critically ill patients in BBOT’s clinical trials may also result in deaths or other adverse medical events due to underlying disease or to other therapies or medications that such patients may receive. Any of these events could prevent BBOT from advancing its product candidates through clinical development, and from obtaining regulatory approval, and would impair BBOT’s ability to commercialize its product candidates. Any inability to advance BBOT’s product candidates through clinical development may harm BBOT’s business, financial condition, results of operations and prospects. Risks Related to Regulatory Approval and Other Legal Compliance Matters BBOT may be unable to obtain U.S. or foreign regulatory approval and, as a result, may be unable to commercialize its product candidates. BBOT’s product candidates are and will continue to be subject to extensive governmental regulations relating to, among other things, research, testing, development, manufacturing, safety, efficacy, approval, recordkeeping, reporting, labeling, storage, packaging, advertising and promotion, pricing, marketing and distribution of drugs. Rigorous preclinical testing and clinical trials and an extensive regulatory approval process must be successfully completed in the U.S. and in many foreign jurisdictions before a new drug can be approved for marketing. Satisfaction of these and other regulatory requirements is costly, time consuming, uncertain and subject to unanticipated delays. BBOT cannot provide any assurance that any product candidate BBOT may develop will progress through required clinical testing and obtain the regulatory approvals necessary for BBOT to begin selling them. BBOT does not have experience conducting, managing or completing large-scale or pivotal clinical trials nor managing the regulatory approval process with the FDA, EMA or any other regulatory authority. The time required to obtain approvals from the FDA, EMA and other regulatory authorities is unpredictable and requires successful completion of extensive clinical trials which typically takes many years, depending upon the type, complexity and novelty of the product candidate. The standards that the FDA and its foreign counterparts use when evaluating clinical trial data can change during drug development, which makes it difficult to predict with any certainty how such standards will be applied. BBOT may also encounter unexpected delays or increased costs due to new government regulations, including future legislation or administrative action, changes in applicable FDA, EMA or other regulatory policy during the period of drug development, clinical trials and regulatory review, or significant changes to FDA personnel during the regulatory review. Applications for BBOT’s product candidates could fail to receive regulatory approval for many reasons, including the following: • the FDA, EMA or other comparable foreign regulatory authorities may disagree with the design, implementation or results of BBOT’s clinical trials; • the FDA, EMA or other comparable foreign regulatory authorities may determine that BBOT’s product candidates are not safe and effective or have undesirable or unintended adverse events, toxicities or other characteristics that preclude BBOT obtaining marketing approval or prevent or limit commercial use; • the population studied in the clinical trial may not be sufficiently broad or representative to assure efficacy and safety in the full population for which BBOT seeks approval; • the FDA, EMA or other comparable foreign regulatory authorities may disagree with BBOT’s interpretation of data from preclinical studies or clinical trials; • BBOT may be unable to demonstrate to the FDA, EMA or other comparable foreign regulatory authorities that BBOT’s product candidates’ risk-benefit ratios for their proposed indications are acceptable; • the FDA, EMA or other comparable foreign regulatory authorities may fail to approve the manufacturing processes, test procedures and specifications or facilities of third-party manufacturers with which BBOT contracts for clinical and commercial supplies; and • the approval policies or regulations of the FDA, EMA or other comparable foreign regulatory authorities may significantly change in a manner rendering BBOT’s clinical data insufficient for approval. 57 Table of Contents Any delay or failure in seeking or obtaining required approvals would have a material and adverse effect on BBOT’s ability to generate revenue from any particular product candidates BBOT is developing and for which BBOT is seeking approval. Furthermore, any regulatory approval to market a drug may be subject to significant limitations on the approved uses or indications for which BBOT may market, promote and advertise the drug or the labeling or other restrictions. In addition, the FDA has the authority to require a REMS plan as part of approving a New Drug Application (“NDA”), or after approval, which may impose further requirements or restrictions on the distribution or use of an approved drug. These requirements or restrictions might include limiting prescribing to certain physicians or medical centers that have undergone specialized training, limiting treatment to patients who meet certain safe-use criteria, distribution through controlled distribution channels, and requiring treated patients to enroll in a registry. These limitations and restrictions may significantly limit the size of the market for the drug and affect reimbursement by third-party payors. BBOT is also subject to numerous foreign regulatory requirements governing, among other things, the conduct of clinical trials, manufacturing and marketing authorization, pricing and third-party reimbursement. The foreign regulatory approval process varies among countries, and generally includes all of the risks associated with FDA approval described above as well as risks attributable to the satisfaction of local regulations in foreign jurisdictions. Moreover, the time required to obtain approval may differ from that required to obtain FDA approval. BBOT plans to develop certain of its current product candidates and potentially future product candidates in combination with other therapies, which would expose BBOT to additional risks. BBOT plans to develop certain of its current product candidates in combination with one or more currently approved cancer therapies or therapies in development and may pursue a similar strategy for future product candidates. For example, the ongoing Phase 1 trial of BBO-8520 is evaluating BBO-8520 both as a monotherapy and in combination with pembrolizumab. On January 7, 2026, BBOT reported positive preliminary safety and antitumor data across its three orally bioavailable, differentiated small molecule RAS and PI3Ka programs. The data updates included BBO-8520, a direct inhibitor targeting both the ON and OFF states of KRASG12C; BBO-11818, a panKRAS inhibitor targeting mutant KRAS in both the ON and OFF states, and BBO-10203, a RAS-PI3Ka breaker with a novel mechanism of action designed to inhibit the physical interaction between RAS and PI3Ka. Even if any of BBOT’s current or future product candidates were to receive marketing approval or be commercialized for use in combination with other existing therapies, BBOT would continue to be subject to the risks that the FDA, EMA or other comparable foreign regulatory authorities could revoke approval of the therapy used in combination with any of BBOT’s product candidates, or safety, efficacy, manufacturing or supply issues could arise with these existing therapies. In addition, it is possible that existing therapies with which BBOT’s product candidates are approved for use could themselves fall out of favor or be relegated to later lines of treatment. This could result in the need to identify other combination therapies for BBOT’s product candidates or BBOT’s own products being removed from the market or being less successful commercially. BBOT may also evaluate its current or future product candidates in combination with one or more other cancer therapies that have not yet been approved for marketing by the FDA, EMA or comparable foreign regulatory authorities. For example, none of BBOT’s product candidates have obtained approval for marketing from any regulatory authority, and BBOT plans to evaluate certain of its product candidates in combination with each other. BBOT will not be able to market and sell any product candidate in combination with any such unapproved cancer therapies that do not ultimately obtain marketing approval. If the FDA, EMA or other comparable foreign regulatory authorities do not approve or withdraw their approval of these other therapies, or if safety, efficacy, commercial adoption, manufacturing or supply issues arise with the therapies BBOT chooses to evaluate in combination with any of its current or future product candidates, BBOT may be unable to obtain approval of or successfully market any one or all of the current or future product candidates BBOT develops. Additionally, if the third-party providers of therapies or therapies in development used in combination with BBOT’s current or future product candidates are unable to produce sufficient quantities for clinical trials or for commercialization of BBOT’s current or future product candidates, or if the cost of combination therapies are prohibitive, BBOT’s development and commercialization efforts would be impaired, which would have an adverse effect on BBOT’s business, financial condition, results of operations and growth prospects. BBOT has conducted and intends to continue conducting certain of its clinical trials globally. However, the FDA and other foreign equivalents may not accept data from such trials, in which case BBOT’s development plans may be delayed, which could materially harm BBOT’s business. BBOT has conducted and intends to continue conducting certain of its clinical trials globally. The acceptance by the FDA or other regulatory authorities of study data from clinical trials conducted outside of their respective jurisdictions may be subject to certain conditions or may not be accepted at all. In cases where data from foreign clinical trials are intended to serve as the sole basis for marketing approval in the U.S., the FDA will generally not approve the application on the basis of foreign data alone unless (i) the data are applicable to the U.S. population and U.S. medical practice; (ii) the trials were performed by clinical investigators of recognized competence and pursuant to good clinical practice (" GCP ") regulations; and (iii) the data may be considered valid without the need for 58 Table of Contents an on-site inspection by the FDA, or if the FDA considers such inspection to be necessary, the FDA is able to validate the data through an on-site inspection or other appropriate means. In addition, even where the foreign study data are not intended to serve as the sole basis for approval, the FDA will not accept the data as support for an application for marketing approval unless the study is well-designed and well-conducted in accordance with GCP requirements, and the FDA is able to validate the data from the study through an onsite inspection if deemed necessary. Many foreign regulatory authorities have similar approval requirements. In addition, such foreign trials would be subject to the applicable local laws of the foreign jurisdictions where the trials are conducted. There can be no assurance that the FDA or any comparable foreign regulatory authority will accept data from trials conducted outside of the U.S. or the applicable jurisdiction and FDA has discussed proposals to increase user fees for marketing applications containing certain foreign clinical data. If the FDA or any comparable foreign regulatory authority does not accept such data, it would result in the need for additional trials, which would be costly and time-consuming and delay aspects of BBOT’s business plan, and which may result in BBOT’s product candidates not receiving approval or clearance for commercialization in the applicable jurisdiction. Conducting clinical trials outside the U.S. also exposes BBOT to additional risks, including risks associated with: • additional foreign regulatory requirements; • foreign exchange fluctuations; • compliance with foreign manufacturing, customs, shipment and storage requirements; • cultural differences in medical practice and clinical research; • diminished protection of intellectual property in some countries; and • interruptions or delays in BBOT’s trials resulting from geopolitical events, including civil or political unrest or military conflicts. Obtaining and maintaining regulatory approval of BBOT’s product candidates in one jurisdiction does not mean that BBOT will be successful in obtaining regulatory approval of its product candidates in other jurisdictions. Obtaining and maintaining regulatory approval of BBOT’s product candidates in one jurisdiction does not guarantee that BBOT will be able to obtain or maintain regulatory approval in any other jurisdiction. For example, even if the FDA grants marketing approval of a product candidate, comparable regulatory authorities in foreign jurisdictions must also approve the marketing of the product candidate in those countries. However, a failure or delay in obtaining regulatory approval in one jurisdiction may have a negative effect on the regulatory approval process in others. Approval procedures vary among jurisdictions and can involve requirements and administrative review periods different from those in the U.S., including additional preclinical studies or clinical trials as clinical trials conducted in one jurisdiction may not be accepted by regulatory authorities in other jurisdictions. In many jurisdictions outside the U.S., a product candidate must obtain pricing and/or reimbursement determinations before it can achieve broad commercial access. In some cases, the price that BBOT intends to charge for its products is also subject to approval. Obtaining foreign regulatory approvals and establishing and maintaining compliance with foreign regulatory requirements could result in significant delays, difficulties and costs for BBOT and could delay or prevent the introduction of BBOT’s products in certain countries. If BBOT or any future collaborator fails to comply with the regulatory requirements in international markets or fails to receive applicable marketing approvals, BBOT’s target market will be reduced and BBOT’s ability to realize the full market potential of BBOT’s product candidates will be harmed. Further, BBOT could face heightened risks with respect to obtaining marketing authorization in the United Kingdom (“ U.K. ”) as a result of the withdrawal of the U.K. from the EU, commonly referred to as Brexit. Following the end of the Brexit transition period on January 1, 2021 and the implementation of the Windsor Framework on January 1, 2025, the U.K. is not generally subject to EU laws in respect of medicines. The EU laws that have been transposed into U.K. law through secondary legislation remain applicable in the U.K., however, new legislation such as the EU Clinical Trials Regulation is not applicable in the U.K. As of January 1, 2021, the Medicines and Healthcare products Regulatory Agency, (“ MHRA ”), is the UK's standalone medicines and medical devices regulator. Since January 1, 2025, under the Windsor Framework, the MHRA regulates medicines through UK-wide marketing authorizations, including for Northern Ireland. As a result, BBOT will be required to obtain separate authorizations in order to market its product candidates in the U.K. and EU. 59 Table of Contents In addition, foreign regulatory authorities may change their approval policies and new regulations may be enacted. For instance, the EU pharmaceutical legislation is currently undergoing a complete review and reform process, in the context of the Pharmaceutical Strategy for Europe initiative, launched by the European Commission in November 2020. The European Commission’s proposal for the revision of several legislative instruments related to medicinal products (potentially reducing the duration of regulatory data protection, revising the eligibility for expedited pathways, etc.) was published on April 26, 2023. In April 2024, the European Parliament adopted its position on the legislative proposals and, in June 2025, the Council of the European Union adopted its position. A provisional political agreement on the reform was reached and a common position on the text was agreed upon on December 11, 2025, in the context of subsequent inter-institutional trilogue negotiations. The revised legislation must still be formally adopted by the European Parliament and the Council of the European Union and the final text may be further refined before formal adoption and publication. The proposed revisions are not expected to become applicable before 2028. The revisions may however have a significant impact on the pharmaceutical industry and BBOT’s business in the long term. Any delay in obtaining, or an inability to obtain, any marketing approvals, as a result of Brexit or otherwise, may force BBOT to restrict or delay efforts to seek regulatory approval in the U.K. for its product candidates, which could significantly and materially harm BBOT’s business. Further, clinical trials conducted in one country may not be accepted by regulatory authorities in other countries. Also, regulatory approval for BBOT’s product candidates may be withdrawn. If BBOT fails to comply with the applicable regulatory requirements, BBOT’s target market will be reduced, BBOT’s ability to realize the full market potential of its product candidates will be harmed, and BBOT’s business, financial condition, results of operations and prospects could be harmed. Even if BBOT’s product candidates receive regulatory approval, they will be subject to significant post-marketing regulatory requirements and oversight. Any regulatory approvals that BBOT may receive for its product candidates will require the submission of reports to regulatory authorities and ongoing surveillance to monitor the safety and efficacy of the product candidate, may contain significant limitations related to use restrictions for specified age groups, warnings, precautions or contraindications, and may include burdensome post-approval study or risk management requirements and regulatory inspection. For example, the FDA may require a REMS in order to approve BBOT’s product candidates, which could entail requirements for a medication guide, physician training and communication plans or additional elements to ensure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. In addition, if the FDA, EMA or foreign regulatory authorities approve BBOT’s product candidates, the manufacturing processes, labeling, packaging, distribution, adverse event reporting, storage, advertising, promotion, import, export and recordkeeping for BBOT’s product candidates will be subject to extensive and ongoing regulatory requirements. These requirements include submissions of safety and other post-marketing information and reports, registration, as well as ongoing compliance with current good manufacturing practices ("cGMP") and GCP for any clinical trials that BBOT conducts post-approval. In addition, manufacturers of drug products and their facilities are subject to continual review and periodic, unannounced inspections by the FDA, competent authorities of the EU Member States and other regulatory authorities for compliance with cGMP regulations and standards. If BBOT or a regulatory authority discover previously unknown problems with a product, such as adverse events of unanticipated severity or frequency, or problems with the facilities where the product is manufactured, a regulatory authority may impose restrictions on that product, the manufacturing facility or BBOT, including requiring recall or withdrawal of the product from the market or suspension of manufacturing. In addition, failure to comply with FDA, EMA and other comparable foreign regulatory requirements may subject BBOT to administrative or judicially imposed sanctions, including: • delays in or the rejection of product approvals; • restrictions on BBOT’s ability to conduct clinical trials, including full or partial clinical holds on ongoing or planned trials; • restrictions on the products, manufacturers or manufacturing process; • warning or untitled letters; • civil and criminal penalties; • injunctions; • suspension or withdrawal of regulatory approvals; • product seizures, detentions or import bans; • voluntary or mandatory product recalls and publicity requirements; • total or partial suspension of production; • imposition of restrictions on operations, including costly new manufacturing requirements; 60 Table of Contents • revisions to the labeling, including limitation on approved uses or the addition of additional warnings, contraindications or other safety information, including boxed warnings; • imposition of a REMS, which may include distribution or use restrictions; and • requirements to conduct additional post-market clinical trials to assess the safety of the product. The FDA, EMA and other regulatory authorities’ policies may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of BBOT’s product candidates. BBOT cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative action, either in the U.S. or abroad. If BBOT is slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if BBOT is not able to maintain regulatory compliance, BBOT may lose any marketing approval that BBOT may have obtained and BBOT may not achieve or sustain profitability. The FDA, competent authorities of the EU Member States and other regulatory authorities actively enforce the laws and regulations prohibiting the promotion of off-label uses. If any of BBOT’s product candidates are approved and BBOT is found to have improperly promoted off-label uses of those products, BBOT may become subject to significant liability. The FDA, competent authorities of the EU Member States and other regulatory authorities strictly regulate the promotional claims that may be made about prescription products, such as BBOT’s product candidates, if approved. In particular, a product may not be promoted in the U.S. for uses that are not approved by the FDA as reflected in the product’s approved labeling, or in other jurisdictions for uses that differ from the labeling or uses approved by the applicable regulatory authorities. While physicians may prescribe products for off-label uses, the FDA, competent authorities of the EU Member States and other regulatory authorities actively enforce laws and regulations that prohibit the promotion of off-label uses by companies, including promotional communications made by companies’ sales forces with respect to off-label uses that are not consistent with the approved labeling, and a company that is found to have improperly promoted off-label uses may be subject to significant civil, criminal and administrative penalties. If BBOT is found to have promoted such off-label uses, BBOT may become subject to significant liability. The U.S. federal government has levied large civil and criminal fines against companies for alleged improper promotion of off-label use and has enjoined several companies from engaging in off-label promotion. The FDA has also requested that companies enter into consent decrees or permanent injunctions under which specified promotional conduct is changed or curtailed. If BBOT cannot successfully manage the promotion of its product candidates, if approved, BBOT could become subject to significant liability, which would materially adversely affect BBOT’s business and financial condition. If BBOT is required by the FDA, EMA or comparable regulatory authority to obtain clearance or approval of a companion diagnostic test in connection with approval of any of BBOT’s product candidates or a group of therapeutic products, and BBOT does not obtain or BBOT faces delays in obtaining clearance or approval of a diagnostic test, BBOT may not be able to commercialize the product candidate and BBOT’s ability to generate revenue may be materially impaired. If BBOT is required by the FDA, EMA or a comparable regulatory authority to obtain clearance or approval of a companion diagnostic test in connection with approval of any of BBOT’s product candidates, such companion diagnostic test would be used during BBOT’s more advanced phase clinical trials as well as in connection with the commercialization of BBOT’s product candidates. To be successful in developing and commercializing product candidates in combination with these companion diagnostics, BBOT or its collaborators will need to address a number of scientific, technical, regulatory and logistical challenges. According to FDA guidance, if the FDA determines that a companion diagnostic device is essential to ensuring the safe and effective use of a novel therapeutic product or new indication, the FDA generally will not approve the therapeutic product or new therapeutic product indication if the companion diagnostic is not also approved or cleared. In certain circumstances (for example, when a therapeutic product is intended to treat a serious or life-threatening condition for which no satisfactory available therapy exists or when the labeling of an approved product needs to be revised to address a serious safety issue), however, the FDA may approve a therapeutic product without the prior or contemporaneous marketing authorization of a companion diagnostic. In this case, approval of a companion diagnostic may be a post-marketing requirement or commitment. Co-development of companion diagnostics and therapeutic products is critical to the advancement of precision medicine. Whether initiated at the outset of development or at a later point, co-development should generally be conducted in a way that will facilitate obtaining contemporaneous marketing authorizations for the therapeutic product and the associated companion diagnostic. If a companion diagnostic is required to identify patients who are most likely to benefit from receiving the product, to be at increased risk for serious adverse events as a result of treatment with a particular therapeutic product, or to monitor response to treatment with a particular therapeutic product for the purpose of adjusting treatment to achieve improved safety or effectiveness, then the FDA has required marketing approval of all companion diagnostic tests essential for the safe and effective use of a therapeutic product for cancer therapies. Various foreign regulatory authorities also regulate in vitro companion diagnostics as medical devices and, under those regulatory frameworks, will likely require the conduct of clinical trials to demonstrate the safety and effectiveness of any future 61 Table of Contents diagnostics BBOT may develop, which BBOT expects will require separate regulatory clearance or approval prior to commercialization in those countries. The approval of a companion diagnostic as part of the therapeutic product’s labeling limits the use of the therapeutic product to only those patients who express the specific genomic alteration or mutation alteration that the companion diagnostic was developed to detect. If the FDA, EMA or a comparable regulatory authority requires clearance or approval of a companion diagnostic for any of BBOT’s product candidates, whether before, concurrently with approval, or post-approval of the product candidate, BBOT and/or future collaborators, may encounter difficulties in developing and obtaining clearance or approval for these companion diagnostics. The process of obtaining or creating such diagnostic is time consuming and costly. The FDA previously has required in vitro companion diagnostics intended to select the patients who will respond to a product candidate to obtain pre-market approval (“PMA”), simultaneously with approval of the therapeutic candidate. The PMA process, including the gathering of preclinical and clinical data and the submission and review by the FDA, can take several years or longer. It involves a rigorous pre-market review during which the sponsor must prepare and provide FDA with reasonable assurance of the device’s safety and effectiveness and information about the device and its components regarding, among other things, device design, manufacturing, and labeling. After a device is placed on the market, it remains subject to significant regulatory requirements, including requirements governing development, testing, manufacturing, distribution, marketing, promotion, labeling, import, export, record-keeping, and adverse event reporting. Any delay or failure by BBOT or third-party collaborators to develop or obtain regulatory clearance or approval of a companion diagnostic could delay or prevent approval or continued marketing of BBOT’s related product candidates. Changes in policy or approach to regulation by the FDA, EMA and other regulatory authorities may impact BBOT’s development of a companion diagnostic for BBOT’s product candidates and could result in delays in regulatory clearance or approval or a change in the determination for whether or not a companion diagnostic is still required for BBOT’s product candidates. BBOT may be required to conduct additional studies to support a broader claim or more narrowed claim for a subset population. Also, to the extent other approved diagnostics are able to broaden their labeling claims to include any of BBOT’s future approved product candidates’ covered indications, BBOT may no longer need to continue its companion diagnostic development plans or BBOT needs to alter those companion diagnostic development strategies, which could adversely impact BBOT’s ability to generate revenue from the sale of BBOT’s companion diagnostic test. Additionally, BBOT may rely on third parties for the design, development and manufacture of companion diagnostic tests for BBOT’s product candidates. If BBOT enters into such collaborative agreements, BBOT will be dependent on the sustained cooperation and effort of its future collaborators in developing and obtaining clearance or approval for these companion diagnostics. It may be necessary to resolve issues such as selectivity/ specificity, analytical validation, reproducibility, or clinical validation of companion diagnostics during the development and regulatory clearance or approval processes. Moreover, even if data from preclinical studies and early clinical trials appear to support development of a companion diagnostic for a product candidate, data generated in later clinical trials may fail to support the analytical and clinical validation of the companion diagnostic. BBOT and its future collaborators may encounter difficulties in developing, obtaining regulatory clearance or approval for, manufacturing and commercializing companion diagnostics similar to those BBOT faces with respect to its product candidates themselves, including issues with achieving regulatory clearance or approval, production of sufficient quantities at commercial scale and with appropriate quality standards, and in gaining market acceptance. If BBOT is unable to successfully develop companion diagnostics for its product candidates, or experiences delays in doing so, the development of BBOT’s product candidates may be adversely affected, BBOT’s product candidates may not obtain marketing approval, and BBOT may not realize the full commercial potential of any of its product candidates that obtain marketing approval. As a result, BBOT’s business, results of operations and financial condition could be materially harmed. In addition, a diagnostic company with whom BBOT contracts may decide to discontinue selling or manufacturing the companion diagnostic test that BBOT anticipates using in connection with development and commercialization of product candidates or BBOT’s relationship with such diagnostic company may otherwise terminate. BBOT may not be able to enter into arrangements with another diagnostic company to obtain supplies of an alternative diagnostic test for use in connection with the development and commercialization of BBOT’s product candidates or do so on commercially reasonable terms, which could adversely affect and/or delay the co-development or commercialization of BBOT’s companion diagnostic and therapeutic product candidates. Where appropriate, BBOT plans to pursue approval from the FDA, EMA or comparable foreign regulatory authorities through the use of accelerated approval pathways. If BBOT is unable to obtain such approval, BBOT may be required to conduct additional preclinical studies or clinical trials beyond those that BBOT contemplates, which could increase the expense of obtaining, and delay the receipt of, necessary marketing approvals. Even if BBOT receives accelerated approval from the FDA, EMA or comparable regulatory authorities, if BBOT’s confirmatory trials do not verify clinical benefit, or if BBOT does not comply with rigorous post-marketing requirements, the FDA, EMA or such other regulatory authorities may seek to withdraw accelerated approval. 62 Table of Contents Where appropriate, BBOT plans to pursue accelerated development strategies in areas of medical need. BBOT may seek an accelerated approval pathway for one or more of its product candidates from the FDA, EMA or comparable foreign regulatory authorities. Under the accelerated approval provisions in the Federal Food, Drug, and Cosmetic Act, and the FDA’s implementing regulations, the FDA may grant accelerated approval to a product candidate designed to treat a serious or life-threatening condition that provides meaningful therapeutic benefit over available therapies upon a determination that the product candidate has an effect on a surrogate endpoint or intermediate clinical endpoint that is reasonably likely to predict clinical benefit. The FDA considers a clinical benefit to be a positive therapeutic effect that is clinically meaningful in the context of a given disease, such as irreversible morbidity or mortality. For the purposes of accelerated approval, a surrogate endpoint is a marker, such as a laboratory measurement, radiographic image, physical sign, or other measure that is thought to predict clinical benefit, but is not itself a measure of clinical benefit. An intermediate clinical endpoint is a clinical endpoint that can be measured earlier than an effect on irreversible morbidity or mortality that is reasonably likely to predict an effect on irreversible morbidity or mortality or other clinical benefit. The accelerated approval pathway may be used in cases in which the advantage of a new drug over available therapy may not be a direct therapeutic advantage, but is a clinically important improvement from a patient and public health perspective. As a condition of approval, the FDA may require that a sponsor of a product receiving accelerated approval perform adequate and well-controlled post-marketing confirmatory clinical trials. These confirmatory trials must be completed with due diligence. Under FDORA, the FDA is permitted to require, as appropriate, that a post-approval confirmatory trial or trials be underway prior to approval or within a specified time period after the date accelerated approval was granted. FDORA also requires sponsors to send updates to the FDA every 180 days on the status of such studies, including progress toward enrollment targets, and the FDA must promptly post this information publicly. Furthermore, under FDORA, the FDA is empowered to take action, such as issuing fines, against companies that fail to conduct with due diligence any post-approval confirmatory trial or submit timely reports to the agency on their progress. In the Consolidated Appropriations Act, Congress provided FDA with additional authorities to help prevent such delays, including that FDA may, when appropriate, require a confirmatory study or studies to be underway prior to approval. In addition, for products under consideration for accelerated approval, the FDA currently requires, unless otherwise requested by the agency, pre-approval of promotional materials prior to dissemination or publication, which could adversely impact the timing of the commercial launch of the product. In the EU, a “conditional” marketing authorization may be granted in cases where all the required safety and efficacy data are not yet available but where the medicinal product meets certain other criteria, including that the medicine fulfils an unmet medical need and the benefit of the medicine's immediate availability to patients is greater than the risk inherent in the fact that additional data are still required. A conditional marketing authorization is subject to conditions to be fulfilled for generating missing data or ensuring increased safety measures. A conditional marketing authorization is valid for one year and has to be renewed annually until fulfillment of all relevant conditions. Once the applicable pending studies are provided, a conditional marketing authorization can become a “standard” marketing authorization. However, if the conditions are not fulfilled within the timeframe set by the EMA, the marketing authorization will cease to be renewed. Prior to seeking accelerated approval, BBOT will seek feedback from the FDA, EMA or comparable foreign regulatory authorities and will otherwise evaluate BBOT’s ability to seek and receive such accelerated approval. There can be no assurance that after BBOT’s evaluation of the feedback and other factors BBOT will decide to pursue or submit an NDA for accelerated approval or any other form of expedited development, review or approval. Similarly, there can be no assurance that after subsequent feedback from the FDA, EMA or comparable foreign regulatory authorities, BBOT will continue to pursue or apply for accelerated approval or any other form of expedited development, review or approval, even if BBOT initially decides to do so. Furthermore, if BBOT decides to submit an application for accelerated approval or any other form of expedited development, review or approval, there can be no assurance that such submission or application will be accepted or that any expedited development, review or approval will be granted on a timely basis, or at all. The FDA, EMA or other comparable foreign regulatory authorities could also require BBOT to conduct further studies prior to considering BBOT’s application or granting approval of any type. A failure to obtain accelerated approval or any other form of expedited development, review or approval for BBOT’s product candidate would result in a longer time period to commercialization of such product candidate, could increase the cost of development of such product candidate and could harm BBOT’s competitive position in the marketplace. BBOT may seek certain designations for its product candidates, including Breakthrough Therapy, Fast Track and Priority Review in the U.S., and PRIME (priority medicines) in the EU, but BBOT might not receive such designations, and even if BBOT does, such designations may not lead to a faster development or regulatory review or approval process. BBOT may seek certain designations for BBO-8520, BBO-10203 and BBO-11818 or future product candidates that could expedite review and approval by the FDA, such as Breakthrough Therapy or Fast Track designation for its product candidates, or priority review for its marketing applications for its candidates. A Breakthrough Therapy product is defined as a product that is intended, alone or in combination with one or more other products, to treat a serious condition, and preliminary clinical evidence indicates that the product may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For products that have been designated as Breakthrough Therapies, early and frequent interaction and communication between the FDA and the sponsor of the trial can help to identify the most efficient path for 63 Table of Contents clinical development. Sponsors may also have greater interactions with the FDA and the FDA may initiate review of sections of the NDA of a product candidate with Breakthrough Therapy designation before the application is complete. This rolling review may be available if the FDA determines, after preliminary evaluation of data submitted by the sponsor, that a product with Breakthrough Therapy designation may be effective. BBOT may also seek Fast Track designation for one or more of its product candidates. The FDA may designate a product for Fast Track review if it is intended, whether alone or in combination with one or more other products, for the treatment of a serious or life-threatening disease or condition, and it demonstrates the potential to address unmet medical needs for such a disease or condition. Like with Breakthrough Therapy designation, sponsors with Fast Track products may have greater FDA interactions and the FDA may initiate review of sections of a Fast Track product’s NDA before the application is complete if it determines, after its preliminary data evaluation, that the product may be effective. BBOT may also seek a priority review designation for one or more of its product candidates. If the FDA determines that a product candidate intended to treat a serious condition and, if approved, offers a significant improvement in safety or effectiveness, the FDA may designate the product candidate for priority review. A priority review designation shortens the goal for the FDA to review an application within six months, rather than the standard review period of ten months. These designations require a sponsor to submit an application for review and approval by the FDA. Accordingly, even if BBOT believes that one of its product candidates meets the criteria for these designations, the FDA may disagree and instead determine not to make such designation. Further, even if BBOT receives a designation, such as the Fast Track designation BBOT has received for BBO-8520 for the treatment of adult patients with previously treated, KRASG12C-mutated metastatic non-small cell lung cancer, the receipt of such designation for a product candidate may not result in a faster development or regulatory review or approval process compared to products considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, even if BBOT’s product candidates qualify for these designations, the FDA may later decide that the product candidates no longer meet the conditions for qualification or decide that the time period for FDA review or approval will not be shortened. In the EU, BBOT may seek support under the EMA's PRIME scheme for some of its product candidates in the future. PRIME is a voluntary program launched by the EMA that is aimed at enhancing the scientific and regulatory support for the development and accelerated assessment of new product candidates that target an unmet medical need. PRIME aims to offer early and proactive support to sponsors to optimize the generation of robust data on the product’s benefits and risks and enable accelerated regulatory assessment of new marketing authorization applications. To be eligible for PRIME, a product candidate must meet the eligibility criteria with respect to its potential to offer a major therapeutic advantage over existing treatments, or benefit patients who do not have any treatment options. The benefits of PRIME include the appointment of a rapporteur from CHMP to provide continued support and help to build knowledge ahead of a marketing authorization application, early dialogue and scientific advice at key development milestones, and the potential to qualify products for accelerated review, meaning reduction in the review time for an opinion on approvability to be issued earlier in the application process. PRIME enables an applicant to request parallel EMA scientific advice and health technology assessment advice to facilitate timely market access. BBOT may apply for support under the PRIME scheme for some of its product candidates and it may not be granted. Even if BBOT receives PRIME designation for any of its product candidates, the designation may not result in a materially faster development process, review or approval compared to conventional EMA procedures. Further, obtaining PRIME designation does not assure or increase the likelihood of EMA’s grant of a marketing authorization. BBOT may not be able to obtain orphan drug designation or obtain or maintain orphan drug exclusivity for its product candidates and, even if BBOT does, that exclusivity may not prevent the FDA, EMA or other comparable foreign regulatory authorities, from approving competing products. Regulatory authorities in some jurisdictions, including the U.S. and the EU, may designate drugs for relatively small patient populations as orphan drugs. Under the Orphan Drug Act, the FDA may designate a product candidate as an orphan drug if it is a drug intended to treat a rare disease or condition, which is generally defined as a patient population of fewer than 200,000 individuals annually in the U.S., or a patient population greater than 200,000 in the U.S. where there is no reasonable expectation that the cost of researching and developing the drug will be recovered from sales in the U.S. BBOT’s target indications may include diseases with large patient populations or may include orphan indications. There can be no assurances that BBOT will be able to obtain orphan designation for its current product candidates or candidates BBOT may discover and develop in the future. In the U.S., orphan drug designation entitles a party to financial incentives such as opportunities for grant funding towards clinical trial costs, tax advantages and user-fee waivers. In addition, if a product candidate that has orphan drug designation subsequently receives the first FDA approval for the disease for which it has such designation, the product candidate is entitled to orphan drug exclusivity. Orphan drug exclusivity in the U.S. provides that the FDA may not approve any other applications, including a full NDA, to market the same drug for the same indication for seven years, except in limited circumstances. The applicable exclusivity period is 10 years in the 64 Table of Contents EU. The EU exclusivity period can be reduced to six years if, at the end of the fifth year, it is determined that a drug no longer meets the criteria for orphan drug designation or if the drug is sufficiently profitable so that market exclusivity is no longer justified. Even if BBOT obtains orphan drug designation for a product candidate, BBOT may not be able to obtain or maintain orphan drug exclusivity for that product candidate. BBOT may not be the first to obtain marketing approval of any product candidate for which BBOT has obtained orphan drug designation, if applicable, for the orphan-designated indication due to the uncertainties associated with developing pharmaceutical products. In addition, exclusive marketing rights in the U.S. may be limited if BBOT seeks approval for an indication broader than the orphan-designated indication or may be lost if the FDA later determines that the request for designation was materially defective or if BBOT is unable to ensure that BBOT will be able to manufacture sufficient quantities of the product to meet the needs of patients with the rare disease or condition. Further, even if BBOT obtains orphan drug exclusivity for a product, that exclusivity may not effectively protect the product from competition because different drugs with different active moieties may be approved for the same condition. Even after an orphan drug is approved, the FDA can subsequently approve the same drug with the same active moiety for the same condition if the FDA concludes that the later drug is clinically superior in that it is shown to be safer, more effective or makes a major contribution to patient care or the manufacturer of the product with orphan exclusivity is unable to maintain sufficient product quantity. Orphan drug designation neither shortens the development time or regulatory review time of a drug nor gives the product candidate any advantage in the regulatory review or approval process or entitles the product candidate to Priority Review. In February 2026, the Consolidated Appropriations Act of 2026 codified the FDA’s longstanding interpretation of the scope of orphan drug exclusivity to apply to “the same drug for the same approved use or indication within such designated rare disease or condition.” This change, which applies retroactively, authorizes the FDA to approve multiple versions of the same orphan drug for different sub-indications and subpopulations, such as adult and pediatric patients or multiple variations of the same disease that are caused by different genetic variants, and ties orphan exclusivity to the indication for which the orphan drug was ultimately approved. The FDA and Congress may further reevaluate the Orphan Drug Act and its regulations and policies. Current and future legislative and regulatory reform measures and cost containment initiatives may increase the difficulty and cost for BBOT to obtain adequate reimbursement for its product candidates and may adversely affect the prices we may set. Current and future legislation and regulations may increase the difficulty and cost for us to commercialize our drugs, if approved, and affect the prices we may obtain, including changes in coverage and reimbursement policies in certain market segments for our product candidates, which could make it difficult for us to sell our product candidates, if approved, profitably. If any such changes were to be imposed, they could adversely affect the operation of our business. Moreover, payment methodologies may be subject to changes in healthcare legislation and regulatory initiatives. For example, CMS may develop new payment and delivery models, including most-favored nations (“MFN”) proposals such as GLOBE, GUARD, and GENEROUS, bundled payment models, or other drug pricing reforms. The current administration has published significant tariffs on certain pharmaceutical products and ingredients, effective in mid-2026, that have not negotiated with the administration to adopt pricing policies such as MFN pricing, which would tie the price for drugs in the United States to the lowest price in a group of other countries. In addition, recently there has been heightened governmental scrutiny over the manner in which manufacturers set prices for their commercial products, which has resulted in several Congressional inquiries and proposed and enacted state and federal legislation designed to, among other things, bring more transparency to product pricing, review the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for pharmaceutical products. Congress has indicated that it will continue to seek new legislative measures to control drug costs. In the U.S. and some foreign jurisdictions, there have been and continue to be a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could, among other things, prevent or delay marketing approval of BBOT’s product candidates, restrict or regulate post-approval activities and affect BBOT’s ability to profitably sell any products for which BBOT obtains marketing approval. BBOT expects that current laws, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional downward pressure on the price that BBOT may receive for any approved products. If reimbursement of BBOT’s products is unavailable or limited in scope, BBOT’s business could be materially harmed. These laws and other healthcare reform measures may result in additional reductions in Medicare and other healthcare funding and otherwise affect the reimbursement BBOT may obtain for any of its product candidates for which BBOT may obtain regulatory approval or the frequency with which any such product is prescribed or used. BBOT expects that the PPACA, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in coverage and payments from private payors. Accordingly, the implementation of cost containment measures or other healthcare reforms may prevent BBOT from being able to generate revenue, attain profitability or commercialize its product candidates. 65 Table of Contents At the U.S. state level, individual states are increasingly aggressive in passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. In addition, regional health care authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription product and other health care programs. These measures could reduce the ultimate demand for BBOT’s products, once approved, or put pressure on product pricing. In addition, in some countries, including member states of the EU, the pricing of prescription pharmaceuticals is subject to governmental control. In these countries, pricing negotiations with governmental authorities can take a significant amount of time after the receipt of marketing approval for a product. In addition, there can be considerable pressure by governments and other stakeholders on prices and reimbursement levels, including as part of cost containment measures. Political, economic and regulatory developments may further complicate pricing negotiations, and pricing negotiations may continue after reimbursement has been obtained. Reference pricing used by various EU member states and parallel distribution, or arbitrage between low-priced and high-priced member states, can further reduce prices, and in certain instances render commercialization in certain markets infeasible or disadvantageous from a financial perspective. In some countries, BBOT or its collaborators may be required to conduct a clinical trial or other studies that compare the cost-effectiveness of BBOT’s products to other available products in order to obtain or maintain reimbursement or pricing approval. Publication of discounts by third party payors or government authorities may lead to further pressure on the prices or reimbursement levels. If reimbursement of BBOT’s products is unavailable or limited in scope or amount, or if pricing is set at unsatisfactory levels, the commercial launch of BBOT’s products could be delayed, possibly for lengthy periods of time, BBOT or its collaborators may not launch at all in a particular country, BBOT may not be able to recoup its investment in one or more products, and there could be a material adverse effect on BBOT’s business. BBOT is or may become subject to stringent privacy laws, information security laws, regulations, policies and contractual obligations related to data privacy and security and changes in such laws, regulations, policies, contractual obligations and failure to comply with such requirements could subject BBOT to significant fines and penalties, which may have a material adverse effect on BBOT’s business, financial condition or results of operations. There are multiple privacy and data security laws that may impact BBOT’s business activities in the U.S. and in other countries where BBOT conducts trials or where BBOT may do business in the future. These laws are evolving and may increase both BBOT’s obligations and its regulatory risks in the future. In the health care industry generally, for example, under the Health Insurance Portability and Accountability Act of 1996 (HIPAA), HHS has issued regulations to protect the privacy and security of protected health information (PHI) used or disclosed by specific covered entities including certain healthcare providers, health plans and healthcare clearinghouses. BBOT is not currently classified as a covered entity or business associate under HIPAA. Thus, BBOT is not directly subject to HIPAA’s requirements or penalties. The healthcare providers, including certain research institutions from which BBOT may obtain patient or subject health information, may be subject to privacy, security, and breach notification requirements under HIPAA. Additionally, any person may be prosecuted under HIPAA’s criminal provisions either directly or under aiding-and-abetting or conspiracy principles. Consequently, depending on the facts and circumstances, BBOT could face criminal penalties if BBOT knowingly receives individually identifiable health information from a HIPAA covered entity, business associate or subcontractor that has not satisfied HIPAA’s requirements for disclosure of individually identifiable health information. In addition, BBOT may maintain sensitive personally identifiable information, including health and genetic information, that BBOT receives throughout the clinical trial process, in the course of BBOT’s research collaborations, and directly from individuals (or their healthcare providers) who may enroll in patient assistance programs if BBOT chooses to implement such programs. As such, in addition to risks and obligations related to HIPAA, BBOT also may be subject to various state and federal laws regulating the use or disclosure of this information or requiring notification of affected individuals and state regulators in the event of a breach of personal information, which is a broader class of information than the health information protected by HIPAA. Refer to “Other U.S. Regulatory Matters” for more information on these state and federal laws. Data breach notification laws, consumer protection laws and genetic information laws may also apply directly to BBOT’s operations and/or those of BBOT’s collaborators and may impose restrictions on BBOT’s collection, use and dissemination of individuals’ health information. Individuals from whom BBOT or its collaborators may obtain health information, as well as the healthcare providers who may share this information with BBOT, may have statutory or contractual rights that limit the ability to use and disclose the information. BBOT may be required to expend significant capital and other resources to ensure ongoing compliance with applicable privacy and data security laws. Claims that BBOT has violated individuals’ privacy rights or breached its contractual obligations, even if BBOT is not found liable, could be expensive and time-consuming to defend and could result in adverse publicity that could harm BBOT’s business. Additionally, the collection, use, disclosure, transfer or other processing of personal data regarding individuals in the European Economic Area or EEA and the UK, including data concerning health, is subject to the EU General Data Protection Regulation, or EU GDPR, with respect to the EEA, and the UK General Data Protection Regulation, or UK GDPR, with respect to the UK, and collectively with the EU GDPR referred to as the “GDPR” in this report unless specified otherwise. The GDPR applies to companies established in 66 Table of Contents the EEA/UK, as well as to any company established outside the EEA/UK, if they collect and use personal data in connection with the offering of goods or services to individuals in the EEA/UK or the monitoring of their behavior in the EEA/ Switzerland/UK. The GDPR is wide-ranging in scope and imposes numerous requirements on companies that process personal data, including requirements relating to processing health and other sensitive data, obtaining consent of the individuals to whom the personal data relates, having legal bases and/or conditions for processing personal data, providing details to those individuals regarding the processing of their personal data, implementing safeguards to protect the security and confidentiality of personal data, having data processing agreements with third parties who process personal data, responding to individuals’ requests to exercise their rights in respect of their personal data, ensuring appropriate technical and organisational measures are in place and reporting security breaches involving personal data to the competent national data protection authority and affected individuals, appointing data protection officers, conducting data protection impact assessments, ensuring certain accountability measures are in place and record keeping. The GDPR also imposes strict rules on the transfer of personal data to countries outside the EEA, including the United States, and permits data protection authorities to impose large penalties for violations of the GDPR, including potential fines of up to €20 million (£17.5 million under the UK GDPR) or 4% of annual global revenues, whichever is greater. The GDPR also confers a private right of action on data subjects and consumer associations to lodge complaints with supervisory authorities, seek judicial remedies, and obtain compensation for damages resulting from violations of the GDPR. Brexit may adversely impact BBOT’s ability to obtain regulatory approvals for its product candidates in the EU, result in restrictions or imposition of taxes and duties for importing BBOT’s product candidates into the EU, and may require BBOT to incur additional expenses in order to develop, manufacture and commercialize BBOT’s product candidates in the EU. Disruptions at the FDA, the SEC and other government agencies or comparable regulatory authorities caused by funding shortages or global health concerns, in addition to continued uncertainty regarding the U.S. presidential administration’s initiatives and staffing cuts and how these might impact the FDA, its implementation of laws, regulations, policies and guidance, and its personnel, could hinder government agencies’ ability to hire and retain key leadership and other personnel, or otherwise prevent new products and services from being developed or commercialized in a timely manner, or otherwise prevent those agencies from performing normal business functions on which BBOT’s business operations rely, including timely reviews, which could negatively impact BBOT’s business. The ability of the FDA or comparable foreign regulatory authorities to review and approve new products can be affected by a variety of factors, including government budget and funding levels, ability to hire and retain key personnel and accept the payment of user fees, and statutory, regulatory, and policy changes that may otherwise affect the FDA’s or comparable foreign regulatory authorities’ ability to perform routine functions. In addition, government funding of the SEC and other government agencies or comparable foreign regulatory authorities on which BBOT’s operations may rely, including those that fund research and development activities, is subject to the political process, which is inherently fluid and unpredictable. Disruptions at the FDA and other agencies, including substantial leadership departures, personnel cuts, and policy changes, may also slow the time necessary for new drugs to be reviewed and/or approved by necessary government agencies, which would harm BBOT’s business. Changes and cuts in FDA staffing could result in delays in the FDA’s responsiveness or in its ability to review IND submissions or applications, issue regulations or guidance, or implement or enforce regulatory requirements in a timely fashion or at all. Similar consequences would also result in the event of another significant shutdown of the federal government. For example, over the last several years, the U.S. federal government has shut down several times and certain regulatory agencies, such as the FDA, have had to furlough critical FDA employees and stop critical activities. If a prolonged government shutdown occurs, or if geopolitical or global health concerns prevent the FDA or other regulatory authorities from conducting their regular inspections, reviews, or other regulatory activities, it could significantly impact the ability of the FDA to timely review and process BBOT’s regulatory submissions, which could materially adversely affect BBOT’s business, financial condition, results of operations and prospects. Such changes could significantly impact the ability of the FDA to timely review and take action on BBOT’s regulatory submissions, which could have a material adverse effect on BBOT’s business, including INDs placed on clinical holds or delayed new drug approvals. Further, in BBOT’s operations as a public company, future government shutdowns or substantial leadership, personnel, and policy changes could impact BBOT’s ability to access the public markets and obtain necessary capital in order to properly capitalize and continue BBOT’s operations. If the FDA is constrained in its ability to engage in oversight and implementation activities in the normal course, BBOT’s business may be negatively impacted. With the change in the U.S. presidential administration in 2025, there continues to be substantial uncertainty as to whether and how the administration will seek to modify or revise the requirements and policies of the FDA and other regulatory agencies with jurisdiction over BBOT’s product candidates and any products for which BBOT obtains approval. This uncertainty could present new challenges and/or opportunities as BBOT navigates development and approval of BBOT’s product candidates. Some of these efforts have manifested to date in the form of personnel cuts and measures that could impact the FDA’s ability to hire and retain key personnel, which could result in delays or limitations on BBOT’s ability to obtain guidance from the FDA on BBOT’s product candidates in 67 Table of Contents development and obtain the requisite regulatory approvals in the future. There remains general uncertainty regarding future activities. The current administration could issue or promulgate executive orders, regulations, policies or guidance that adversely affect BBOT or create a more challenging or costly environment to pursue the development of new therapeutic products. Alternatively, state governments may attempt to address or react to changes at the federal level with changes to their own regulatory frameworks in a manner that is adverse to BBOT’s operations. If BBOT becomes negatively impacted by future governmental orders, regulations, policies or guidance as a result of the new administration, there could be a material adverse effect on BBOT and its business. If BBOT’s product candidates are licensed for marketing and receive federal healthcare reimbursement, any relationships BBOT may have with healthcare providers will be subject to applicable healthcare fraud and abuse laws and regulations, which could expose BBOT to criminal and civil penalties and exclusion from participation in government healthcare programs. Healthcare providers, physicians and third-party payors will play a primary role in the recommendation and prescription of any products for which BBOT is able to obtain marketing approval. Any arrangements BBOT has with healthcare providers, third-party payors and customers will subject BBOT to broadly applicable fraud and abuse and other healthcare laws and regulations. The laws and regulations may constrain the business or financial arrangements and relationships through which BBOT conducts clinical research, markets, sells and distributes any products for which BBOT obtains marketing approval. These include the following: • the federal Anti-Kickback Statute prohibits, among other things, persons and entities from knowingly and willfully soliciting, receiving, offering, or paying any remuneration (including any kickback, bribe or rebate), directly or indirectly, overtly or covertly, in cash or in kind, to induce or reward or in return for, either the referral of an individual for or the purchase, lease or order of a good, facility, item or service for which payment may be made under a federal healthcare program such as Medicare and Medicaid. A person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation. Violations are subject to civil and criminal fines and penalties for each violation, plus up to three times the remuneration involved, imprisonment, and exclusion from government healthcare programs. In addition, the government may assert that a claim including items or services resulting from a violation of the U.S. federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the civil False Claims Act. • federal civil and criminal false claims laws, including the FCA and civil monetary penalty laws, which impose criminal and civil penalties against individuals or entities for, among other things, knowingly presenting, or causing to be presented, claims for payment or approval from Medicare, Medicaid or other federal healthcare programs that are false or fraudulent; knowingly making or causing a false statement material to a false or fraudulent claim or an obligation to pay money to the federal government; or knowingly concealing or knowingly and improperly avoiding or decreasing such an obligation. Manufacturers can be held liable under the FCA even when they do not submit claims directly to government payors if they are deemed to “cause” the submission of false or fraudulent claims. The FCA also permits a private individual acting as a “whistleblower” to bring actions on behalf of the federal government alleging violations of the FCA and to share in any monetary recovery; • the federal Health Insurance Portability and Accountability Act of 1996 (HIPAA) imposes criminal and civil liability for, among other things, executing, or attempting to execute, a scheme or making materially false statements in connection with the delivery of or payment for health care benefits regardless of the payor (e.g., public or private), items or services. Similar to the federal Anti-Kickback Statute, a person or entity can be found guilty of violating these statutes without actual knowledge of the statutes or specific intent to violate them in order to have committed a violation; • the federal Physician Payments Sunshine Act requires certain manufacturers of drugs, devices, biologics and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program, with specific exceptions, to report annually to CMS information related to payments or transfers of value made to physicians, other healthcare providers and teaching hospitals, as well as information regarding ownership and investment interests held by physicians and their immediate family members. • U.S. federal and state laws government price reporting laws, which require manufacturers to calculate and report complex pricing metrics in an accurate and timely manner to government programs; and • analogous state and foreign laws and regulations, such as state and foreign anti-kickback, false claims, consumer protection and unfair competition laws which may apply to pharmaceutical business practices, including but not limited to, research, distribution, sales, and marketing arrangements as well as submitting claims involving healthcare items or services reimbursed by any third-party payor, including commercial insurers; state laws that require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government that otherwise restricts payments that may be made to healthcare providers and other potential referral sources; state laws that require drug manufacturers to file reports with states regarding pricing and marketing information, such as the tracking and reporting of gifts, compensations and other remuneration and items of value provided to healthcare professionals and entities; and state and local laws requiring the registration of pharmaceutical sales representatives 68 Table of Contents The provision of benefits or advantages to physicians to induce or encourage the prescription, recommendation, endorsement, purchase, supply, order or use of medicinal products is also prohibited in the EU. Infringement of these laws could result in substantial fines and imprisonment. Payments made to physicians in certain EU Member States must be publicly disclosed. Moreover, agreements with physicians often must be the subject of prior notification and approval by the physician’s employer, his or her competent professional organization and/or the regulatory authorities of the individual EU Member States. These requirements are provided in the national laws, industry codes or professional codes of conduct applicable in the EU Member States. BBOT’s failure to comply with these requirements could result in reputational risk, public reprimands, administrative penalties, fines or imprisonment. Efforts to ensure that any business arrangements BBOT has with third parties and BBOT’s business generally will comply with applicable healthcare laws and regulations will involve substantial costs. It is possible that governmental authorities will conclude that BBOT’s business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If BBOT’s operations are found to be in violation of any of these laws or any other governmental regulations that may apply to BBOT, BBOT may be subject to significant civil, criminal and administrative penalties, damages, fines, individual imprisonment, additional reporting requirements and oversight if BBOT becomes subject to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, exclusion of products from government funded healthcare programs, such as Medicare and Medicaid, disgorgement, contractual damages, reputational harm, diminished profits and future earnings, and the curtailment or restructuring of BBOT’s operations. Defending against any such actions in connection with these laws can be costly and time-consuming and may require significant financial and personnel resources. Therefore, even if we are successful in defending against any such actions that may be brought against us, our business may be impaired. Further, if any of the physicians or other healthcare providers or entities with whom we expect to do business are found not to be in compliance with applicable laws or regulations, they may be subject to significant criminal, civil, or administrative sanctions, including exclusions from government-funded healthcare programs. If any of the above occur, our ability to operate our business and our results of operations could be adversely affected. BBOT’s employees, independent contractors, consultants, commercial collaborators, principal investigators, CROs, suppliers and vendors may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements. BBOT is exposed to the risk that its employees, independent contractors, consultants, commercial collaborators, principal investigators, CROs, suppliers and vendors may engage or may have engaged in fraud, misconduct or other improper activities. Misconduct by these parties could include failures to comply with FDA, EMA or comparable foreign regulatory authority regulations, provide accurate information to the FDA, EMA or comparable foreign regulatory authorities, comply with federal and state health care fraud and abuse laws and regulations, accurately report financial information or data or disclose unauthorized activities to BBOT. In particular, research, sales, marketing and business arrangements in the health care industry are subject to extensive laws and regulations intended to prevent fraud, misconduct, kickbacks, self-dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements. Misconduct by these parties could also involve the improper use of information obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm to BBOT’s reputation. BBOT has adopted a code of conduct and engages contractors that agree to undertake certain measures with respect to their employees, but it is not always possible to identify and deter misconduct by these parties, and the precautions BBOT takes to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting BBOT from governmental investigations or other actions or lawsuits stemming from a failure to comply with these laws or regulations. If any such actions are instituted against BBOT, and BBOT is not successful in defending itself or asserting its rights, those actions could have a significant impact on BBOT’s business, including the imposition of significant penalties, including civil, criminal and administrative penalties, damages, fines, disgorgement, imprisonment, exclusion from participation in government funded healthcare programs, such as Medicare and Medicaid, integrity oversight and reporting obligations, contractual damages, reputational harm, diminished profits and future earnings and the curtailment or restructuring of BBOT’s operations. BBOT’s business activities may be subject to the U.S. Foreign Corrupt Practices Act (“FCPA”) and similar anti- bribery and anti-corruption laws of other countries in which BBOT operates, as well as U.S. and certain foreign export controls, economic sanctions, import, and trade and national security laws and regulations. Compliance with these legal requirements could limit BBOT’s ability to compete in foreign markets and subject BBOT to liability if BBOT violates them. 69 Table of Contents BBOT’s business activities may be subject to the FCPA and similar anti-bribery or anti-corruption laws, regulations or rules of other countries in which BBOT operates. The FCPA generally prohibits companies and their employees and third-party intermediaries from offering, promising, giving or authorizing others to give anything of value, either directly or indirectly, to a non-U.S. government official in order to influence official action or otherwise obtain or retain business. The FCPA also requires public companies to make and keep books and records that accurately and fairly reflect the transactions of the corporation and to devise and maintain an adequate system of internal accounting controls. BBOT’s business is heavily regulated and therefore involves significant interaction with public officials, including officials of non-U.S. governments. Additionally, in many other countries, hospitals are owned and operated by the government, and doctors and other hospital employees would be considered foreign officials under the FCPA. The biotechnology and pharmaceutical industries have historically presented a heightened risk profile for FCPA enforcement. There is no certainty that all of BBOT’s employees, agents or contractors, or those of BBOT’s affiliates, will comply with all applicable laws and regulations, particularly given the high level of complexity of these laws. Violations of these laws and regulations could result in fines, criminal sanctions against BBOT, its officers or employees, disgorgement, and other sanctions and remedial measures, and prohibitions on the conduct of BBOT’s business. Any such violations could include prohibitions on BBOT’s ability to offer its products in one or more countries and could materially damage BBOT’s reputation, brand, international activities, ability to attract and retain employees and business, prospects, operating results and financial condition. In addition, BBOT’s business activities (including conduct of clinical trials) and products may be subject to U.S. and foreign export controls, economic sanctions, import and trade and national security laws and regulations. Governmental regulation of the import or export of BBOT’s products, or BBOT’s failure to obtain any required import or export authorization for its products, when applicable, could harm BBOT’s international or domestic sales and adversely affect revenue. Compliance with applicable regulatory requirements regarding the conduct of clinical trials and export of BBOT’s products may create delays in the introduction of BBOT’s products in international markets or, in some cases, prevent the export of BBOT’s products to some countries altogether. Furthermore, U.S. export control laws and economic sanctions prohibit certain transactions and the shipment of certain products and services to countries, governments, and persons targeted by U.S. sanctions. If BBOT fails to comply with export and import regulations and such economic sanctions, penalties could be imposed, including fines and/or denial of certain export privileges and reputational harm. Moreover, any new export controls, import restrictions, economic sanctions, national security policy, new legislation or shifting approaches in the enforcement or scope of existing regulations, or in the countries, persons, or products targeted by such regulations, could result in decreased use of BBOT’s products by, or in BBOT’s decreased ability to export its products to, existing or potential customers with international operations, in addition to adversely affecting cross-border operations and transactions. Any decreased use of BBOT’s products or limitation on BBOT’s ability to export or sell its products, or import materials for its products, would likely adversely affect BBOT’s business. For instance, the U.S. Department of Justice’s Bulk Data Rule, which went into effect April 8, 2025 prohibits certain covered data transactions (including for human ‘omic and personal health data) and establishing data security requirements for restricted transactions involving China, Russia, and other countries of concern on national security grounds. The regulations also restrict certain investment agreements, employment agreements and vendor agreements involving such data and countries of concern, absent specified cybersecurity controls. Actual or alleged violations of these regulations may be punishable by criminal and/or civil sanctions, and may result in exclusion from participation in federal and state programs. More recently, tariffs have been proposed on products from Canada, China, Mexico and potentially other countries, which could have the effect of disrupting, and increasing costs associated with, BBOT’s supply chain of materials and other imports needed for its operations and business in the United States. The course of trade relations between the United States and other countries is difficult to predict, including how operations, transactions, products, and services may be impacted by the respective trade policies of the United States and other countries (including those in retaliation). If BBOT is unable to conduct transactions, obtain or use services, or export or sell products or services to third parties, including vendors, customers, and partners in other countries, BBOT’s business, liquidity, financial condition, or operations would be materially and adversely affected. If BBOT fails to comply with applicable environmental, health and safety laws and regulations, BBOT could become subject to fines or penalties or incur costs that could have a material adverse effect on the success of BBOT’s business. BBOT is subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures, and the handling, use, storage, treatment and disposal of hazardous materials and wastes. BBOT’s operations involve the use of hazardous and flammable materials, including chemicals and biological and radioactive materials. BBOT’s operations also produce hazardous waste products. BBOT generally contracts with third parties for the disposal of these materials and wastes. BBOT cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury resulting from BBOT’s use of hazardous materials, BBOT could be held liable for any resulting damages, and any liability could exceed BBOT’s resources. BBOT also could incur significant costs associated with civil or criminal fines and penalties. 70 Table of Contents Although BBOT maintains workers’ compensation insurance to cover BBOT for costs and expenses BBOT may incur due to injuries to its employees resulting from the use of hazardous materials, this insurance may not provide adequate coverage against potential liabilities. BBOT does not maintain insurance for environmental liability or toxic tort claims that may be asserted against BBOT in connection with BBOT’s storage or disposal of biological, hazardous or radioactive materials. Compliance with applicable environmental, health and safety laws and regulations is expensive, and current or future environmental regulations may impair BBOT’s business, prospects, financial condition or results of operations. Risks Related to BBOT’s Business BBOT’s success is highly dependent on BBOT’s ability to attract, hire and retain highly skilled executive officers and employees, and BBOT may experience difficulties in managing the future growth of BBOT’s organization. BBOT currently has a small team focused on research and development of RAS-pathway targeted small molecules. To succeed, BBOT must recruit, hire, retain, manage and motivate qualified clinical, scientific, technical, financial and management personnel, and BBOT faces significant competition for experienced personnel. Personnel with the required skills and experience may be scarce or may not be available at all. In addition, competition for these skilled personnel is intense and recruiting and retaining skilled employees is difficult, particularly for a development-stage company such as BBOT. Even if BBOT is successful in identifying, attracting, hiring and retaining qualified employees, recent market changes, including labor shortages, and rising inflation have increased employee-related costs substantially, which may negatively affect BBOT’s operating results. BBOT is highly dependent on the principal members of its management and scientific and medical staff. If BBOT does not succeed in attracting and retaining qualified personnel in these positions, it could adversely affect BBOT’s ability to execute its business plan and harm its operating results. In particular, the loss of one or more of BBOT’s executive officers could be detrimental if BBOT cannot recruit suitable replacements in a timely manner. In April 2026, BBOT announced certain changes to its management team, including the appointment of Pedro J. Beltran, who succeeded Eli Wallace as BBOT’s President and Chief Executive Officer and the appointment of Idan Elmelech as BBOT’s Chief Operating Officer, effective April 20, 2026. Neil Kumar was also appointed as the Executive Chairman of BBOT’s board of directors, effective April 20, 2026. And, on April 21, 2026, Uneek Mehra, BBOT’s Chief Financial Officer departed from his roles as principal financial officer and principal accounting officer of BBOT, and his last day with BBOT was on April 30, 2026. Effective April 21, 2026, BBOT appointed Mr. Elmelech as its principal financial officer and Marc Cobo, who is BBOT’s Vice President of Finance and Controller, as its principal accounting officer. Many of the other biotechnology companies that BBOT competes against for qualified personnel have greater financial and other resources, different risk profiles and a longer history in the industry than BBOT does. They also may provide higher compensation, more diverse opportunities and better prospects for career advancement. Some of these characteristics may be more appealing to high-quality candidates than what BBOT has to offer. If BBOT is unable to continue to attract and retain high-quality personnel, the rate and success at which BBOT can discover, develop and commercialize its product candidates will be limited and the potential for successfully growing BBOT’s business will be harmed. Additionally, BBOT relies on its clinical advisory board and other scientific and clinical advisors and consultants to assist BBOT in formulating its research, development and clinical strategies. Most of these advisors and consultants are not BBOT’s employees and may have commitments to, or consulting or advisory contracts with, other entities that may limit their availability. In addition, these advisors and consultants typically will not enter into non-compete agreements with BBOT. If a conflict of interest arises between their work for BBOT and their work for another entity, BBOT may lose their services. Furthermore, BBOT’s advisors may have arrangements with other companies to assist those companies in developing products or technologies that may compete with BBOT’s. In particular, if BBOT is unable to maintain consulting or employment relationships with other scientific and clinical advisors, or if they provide services to BBOT’s competitors, BBOT’s development and commercialization efforts will be impaired and BBOT’s business will be significantly harmed. For example, if BBOT is no longer able to access its network of physician-scientists, BBOT’s ability to define and characterize patients’ needs for future product candidate development may be negatively affected. In order to successfully implement BBOT’s development and commercialization plans and strategies, and as BBOT grows as a public company, BBOT expects to need significant additional managerial, operational, financial, sales, marketing and other personnel. Future growth will impose significant added responsibilities on members of management, including: • identifying, recruiting, integrating, maintaining, retaining and motivating BBOT’s current and additional employees; • managing BBOT’s internal development efforts effectively, including the preclinical, clinical, FDA, EMA and other comparable foreign regulatory authorities’ review process for BBO-8520, BBO-10203 and BBO-11818 and BBOT’s discovery programs, while complying with any contractual obligations to contractors and other third parties; 71 Table of Contents • managing increasing operational and managerial complexity; and • improving BBOT’s operational, financial and management controls, reporting systems and procedures. BBOT currently relies, and for the foreseeable future will continue to rely, in substantial part on certain independent organizations, advisors and consultants to provide certain services, including key aspects of research, clinical development and manufacturing. There can be no assurance that the services of independent organizations, advisors and consultants will continue to be available to BBOT on a timely basis when needed, or that BBOT can find qualified replacements. In addition, if BBOT is unable to effectively manage its outsourced activities or if the quality or accuracy of the services provided by third-party service providers is compromised for any reason, BBOT’s preclinical studies and clinical trials may be extended, delayed or terminated, and BBOT may not be able to obtain marketing approval for any of its product candidates or otherwise advance its business. There can be no assurance that BBOT will be able to manage its existing third-party service providers or find other competent outside contractors and consultants on economically reasonable terms, or at all. If BBOT is not able to effectively expand its organization by hiring new employees and/or engaging additional third-party service providers, BBOT may not be able to successfully implement the tasks necessary to further develop and commercialize BBO-8520, BBO-10203 and BBO-11818 or any future product candidate from BBOT’s discovery programs and, accordingly, may not achieve its research, development and commercialization goals. BBOT’s reliance on a limited number of employees who provide various administrative, research and development, and other services across BBOT’s organization presents operational challenges that may adversely affect BBOT’s business. As of March 31, 2026, BBOT had 106 full-time employees, upon whom BBOT relies for various administrative, research and development, and other services. The small size of BBOT’s team may limit BBOT’s ability to devote adequate personnel, time, and resources to support BBOT’s operations or research and development activities, and the management of financial, accounting, and reporting matters. If BBOT’s team fails to provide adequate administrative, research and development, or other services across BBOT’s organization, its business, financial condition, and results of operations could be harmed. BBOT’s internal computer systems, or those of any of BBOT’s CROs, manufacturers, other contractors or consultants or potential future collaborators, may fail or suffer actual or suspected security incidents, data breaches or other unauthorized or improper access to, use of, or destruction of BBOT’s proprietary or confidential data, employee data, or personal data. Such security incidents, data breaches, and other unauthorized activities could result in additional costs, loss of revenue, significant liabilities, harm to BBOT’s brand, material disruption of BBOT’s operations, and potentially significant delays in BBOT’s delivery to market. Despite the implementation of security measures, BBOT’s systems and the systems of BBOT’s third-party CROs, other contractors (including sites performing BBOT’s clinical trials) and consultants may be vulnerable to breakdown or other damage or interruption from service interruptions, system malfunction, natural disasters, terrorism, war and telecommunication and electrical failures, as well as security incidents or data breaches. BBOT and the third parties upon which BBOT relies face a variety of evolving threats, including from inadvertent or intentional actions by BBOT’s employees, contractors, consultants, business partners, and/or other third parties as well as from cyber-attacks by malicious third parties (including the deployment of harmful malware, ransomware, denial-of-service attacks, social engineering (including phishing attacks) and other means to affect service reliability and threaten the confidentiality, integrity and availability of information). Security incidents, data breaches and other adverse activity may compromise BBOT’s system infrastructure or lead to the loss, destruction, alteration or dissemination of, or damage to, BBOT’s data. These attacks and activity are also being facilitated or enhanced by evolving technologies, including artificial intelligence. The risk of a security incident, data breach or other disruption through cyber-attacks has generally increased as the number, intensity and sophistication of attempted attacks from around the world have increased. Attempts to disrupt or gain unauthorized access to BBOT’s and BBOT’s third-party vendors’ information systems from malicious third parties or insider threats may incorporate widely varying and frequently changing tactics, which may be enhanced or facilitated by artificial intelligence. Also, many of BBOT’s employees are working remotely. As a result, BBOT may have increased cybersecurity and data security risks, due to increased use of home wi-fi networks and virtual private networks, as well as increased disbursement of physical machines. While BBOT implements IT controls to reduce the risk of a security incident or data breach, there is no guarantee that these measures will be adequate to safeguard all systems. Like other companies in the industry, BBOT, and BBOT’s third party vendors, have experienced threats and security incidents relating to their information technology systems and infrastructure. To the extent that any disruption, security incident, or data breach were to result in a loss, destruction, unavailability, alteration or dissemination of, or damage to, BBOT’s data (including confidential information and personal data) or applications, or for it to be believed or reported that any of these occurred, BBOT could incur liability and reputational damage. Further, in such an event, the development and commercialization of BBOT’s product candidates could be delayed. There can be no assurance that BBOT’s data protection efforts, or the efforts or investments of CROs, consultants or other third parties, will prevent significant breakdowns, data breaches or other security incidents that cause loss, destruction, unavailability, 72 Table of Contents alteration or dissemination of, or damage to, BBOT’s data. Such events could have a material adverse effect upon BBOT’s reputation, business, operations or financial condition. For example, if such an event were to occur and cause interruptions in BBOT’s operations, it could result in a material disruption of BBOT’s programs and the development of BBOT’s product candidates could be delayed. In addition, the loss of clinical trial data for BBOT’s product candidates could result in delays in BBOT’s marketing approval efforts and significantly increase BBOT’s costs to recover or reproduce the data, as well as claims or investigations from regulators or other third parties. Furthermore, significant disruptions of BBOT’s internal information technology systems, security incidents or data breaches could result in the loss, misappropriation, and/or unauthorized access, use, or disclosure of, or the prevention of access to, data (including trade secrets or other confidential information, intellectual property, proprietary business information, and personal data), which could result in financial, legal, business, and reputational harm to BBOT. Such harm may include significant expenses, remediation costs, litigation, disputes, claims by third parties and regulatory actions or investigations. For example, any such event that leads to unauthorized access, use, or disclosure of personal data, including personal data regarding BBOT’s clinical trial subjects or employees, could harm BBOT’s reputation directly, compel BBOT to comply with federal and/or state breach notification laws and foreign law equivalents, subject BBOT to financial exposure related to the investigation of the security incident or data breach (including cost of forensic examinations), subject BBOT to mandatory corrective action, and otherwise subject BBOT to liability under laws and regulations that protect the privacy and security of data, which could result in significant legal and financial exposure and reputational damages that could potentially have a material adverse effect on BBOT’s business. Notifications, follow-up actions, claims and investigations related to a security incident or data breach could impact BBOT’s reputation and cause BBOT to incur significant costs, including legal expenses and remediation costs. For example, the loss of clinical trial data from completed or future clinical trials could result in delays in BBOT’s regulatory approval efforts and significantly increase BBOT’s costs to recover or reproduce the lost data. BBOT expects to incur significant costs in an effort to detect and prevent security incidents and data breaches, and BBOT may face increased costs and requirements to expend substantial resources in the event of an actual or perceived security incident or data breach. BBOT also relies on third parties to manufacture its product candidates, and similar events relating to their computer systems could also have a material adverse effect on BBOT’s business. To the extent that any disruption, data breach or security incident were to result in a loss, destruction or alteration of, or damage to, BBOT’s data (including personal data), or inappropriate disclosure of confidential or proprietary information, BBOT could be exposed to litigation and governmental investigations. Moreover, the further development and commercialization of BBOT’s product candidates could be delayed, and BBOT could be subject to significant fines or penalties for any noncompliance with state, federal and/or international privacy and security laws. BBOT’s contracts may not contain limitations of liability, and even where they do, there can be no assurance that limitations of liability in those contracts are sufficient to protect BBOT from liabilities, damages, or claims related to its privacy and data security obligations. BBOT’s insurance policies may not be adequate to compensate BBOT for the potential losses arising from any such disruption in, or failure, security incident, or data breach of, BBOT’s systems or third-party systems where information important to BBOT’s business operations or commercial development is stored. In addition, such insurance may not be available to BBOT in the future on economically reasonable terms, or at all. Further, BBOT’s insurance may not cover all claims made against BBOT and could have high deductibles in any event, and defending a suit, regardless of its merit, could be costly and divert management attention. BBOT's updating of its business systems could result in implementation issues and business disruptions We have, and will continue to, update and consolidate systems and automate processes across many parts of its business, using a variety of systems, including the implementation of new enterprise resource planning (“ERP”) software. Specifically, BBOT has implemented a new ERP system as of January 1, 2026. The expansion and ongoing implementation of operational systems may occur at a future date based on value to the business. In general, the process of planning and preparing for these types of integrated, wide-scale implementations is highly complex and success requires addressing a number of challenges, including information security assessment and remediation, data conversion, network and system cutover, user training, and integration with existing processes or systems. Incongruities in any of these areas could cause operational problems during implementation including inconsistent practices, delayed reporting, billing errors, and accounting errors. BBOT’s use of new and evolving technologies, such as artificial intelligence, may present risks and challenges that can impact BBOT’s business, including by posing cybersecurity and other risks to BBOT’s confidential and/or proprietary information, including personal information, and as a result BBOT may be exposed to reputational harm and liability. BBOT may use and integrate artificial intelligence into BBOT’s business processes, and this innovation presents risks and challenges that could affect its adoption, and therefore BBOT’s business. Use of this technology could pose cybersecurity, data privacy, IT, intellectual property, regulatory, legal, operational, competitive, reputational and other risks and challenges that could affect BBOT’s business. 73 Table of Contents The rapid evolution of artificial intelligence will require the application of significant resources to design, develop, test and maintain BBOT products and services to help ensure that artificial intelligence is implemented in accordance with applicable law and regulation and in a socially responsible manner and to minimize any real or perceived unintended harmful impacts. The development of artificial intelligence models requires resources for design, development, testing and maintenance. If BBOT enables or uses models that contain actual or perceived biases, or otherwise draws controversy due to perceived or actual negative societal impact, BBOT may experience brand or reputational harm, competitive harm or legal liability. In addition, the use of artificial intelligence technologies can give rise to intellectual property risks, including the disclosure or compromise of BBOT’s confidential information or other proprietary intellectual property through the use of generative AI tools, or the ability to assert or defend ownership rights in intellectual property created with the use of generative artificial intelligence tools. Further, BBOT expects to see increasing government and supranational regulation related to artificial intelligence use and ethics, which may also significantly increase the burden and cost of research, development and compliance in this area. For example, the EU’s Artificial Intelligence Act (“ AI Act ”) originally entered into force on August 1, 2024, and is expected to undergo amendments as introduced in the EU’s November 2025 Digital Omnibus on AI. As enacted, the AI Act imposes significant obligations on providers and deployers of high-risk artificial intelligence systems, and encourages providers and deployers of artificial intelligence systems to account for EU ethical principles in their development and use of these systems. The scope of requirements depends on judicial interpretations and forthcoming legislative amendments, and non-compliance can lead to significant fines. Likewise, in the U.S., the regulatory environment is complex and uncertain. President Trump's Executive Order "Ensuring a National Policy Framework for Artificial Intelligence," effective December 11, 2025, directed federal agency reviews of state AI laws and coordination between White House advisors and Congress to reach a legislative proposal for a uniform federal AI policy framework. At the same time, several states, including Colorado and California, passed laws that regulate various facets of AI, some of which have taken effect and will continue to take effect through 2026 and beyond. These laws address a wide range of AI-related topics, including consequential decisions, transparency, training data, among others, and it remains unclear which requirements, if any, will be superseded by the Executive Order. So far, these efforts have not been successful in curtailing state action on AI regulation, contributing to a complicated legislative patchwork, which may be litigated in state and federal courts. Various federal and state regulators have also issued guidance and focused enforcement efforts on the use of AI in regulated sectors. The FDA, for example, issued draft guidance on the use of artificial intelligence in regulatory decision-making for drug and biological products that centers on the context of use while establishing a credibility assessment framework for establishing and evaluating AI model outputs intended to support regulatory decision-making. If BBOT develops or uses AI systems that are governed by the these laws or regulations, including as informed by regulatory guidance, BBOT will need to meet higher standards of data quality, transparency, and human oversight, and BBOT would need to adhere to specific and potentially burdensome and costly ethical, accountability, and administrative requirements. BBOT may also be subject to significant enforcement or litigation in the event of any perceived non-compliance. BBOT’s vendors may in turn incorporate AI tools into their offerings, and the providers of these AI tools may not meet existing or rapidly evolving regulatory or industry standards, including with respect to privacy and data security. Further, bad actors around the world use increasingly sophisticated methods, including the use of artificial intelligence, to engage in illegal activities involving the theft and misuse of personal information, confidential information and intellectual property. In addition, the use of generative AI models in BBOT’s internal or third-party systems may create new attack surfaces or methods for adversaries, which could impact BBOT and its vendors. The integration of AI systems, by BBOT or by its vendors, may increase cybersecurity risk. Any of these effects could damage BBOT’s reputation, result in the loss of valuable property and information, cause BBOT to breach applicable laws and regulations, and adversely impact BBOT’s business. BBOT’s operations are vulnerable to interruption by flood, fire, earthquakes, power loss, telecommunications failure, terrorist activity, pandemics and other events beyond BBOT’s control, which could harm BBOT’s business. BBOT’s corporate headquarters are located in South San Francisco, California. BBOT has not undertaken a systematic analysis of the potential consequences to its business and financial results from a major flood, fire, earthquake, power loss, telecommunications failure, terrorist activity, pandemic or other disasters and BBOT does not have a recovery plan for such disasters. In addition, BBOT does not carry sufficient insurance to compensate for actual losses from interruption of BBOT’s business that may occur, and any losses or damages incurred by BBOT could harm BBOT’s operations and financial condition and increase costs and expenses. BBOT has never commercialized a product candidate as a company before. If BBOT is unable to establish sales or marketing capabilities or enter into agreements with third parties to sell or market BBOT’s product candidates, BBOT may not be able to successfully sell or market its product candidates that obtain regulatory approval. BBOT has never commercialized a product and currently does not have and has never had a significant marketing or sales team. In order to commercialize any product candidates, if approved, BBOT must build marketing, sales, distribution, managerial and other 74 Table of Contents non-technical capabilities or make arrangements with third parties to perform these services for each of the territories in which BBOT may have approval to sell or market its product candidates. BBOT may not be successful in accomplishing these required tasks. Establishing an internal sales or marketing team with technical expertise and supporting distribution capabilities to commercialize BBOT’s product candidates will be expensive and time-consuming and will require significant attention of BBOT’s executive officers to manage. Any failure or delay in the development of BBOT’s internal sales, marketing and distribution capabilities could adversely impact the commercialization of any of BBOT’s product candidates that BBOT obtains approval to market if BBOT does not have arrangements in place with third parties to provide such services on its behalf. Alternatively, if BBOT chooses to collaborate, either globally or on a territory-by-territory basis, with third parties that have direct sales forces and established distribution systems, either to augment BBOT’s own sales force and distribution systems or in lieu of BBOT’s own sales force and distribution systems, BBOT will be required to negotiate and enter into arrangements with such third parties relating to the proposed collaboration and such arrangements may prove to be less profitable than commercializing the product on BBOT’s own. If BBOT is unable to enter into such arrangements when needed, on acceptable terms or at all, BBOT may not be able to successfully commercialize any of its product candidates that receive regulatory approval, or any such commercialization may experience delays or limitations. If BBOT is unable to successfully commercialize its approved product candidates, either on its own or through collaborations with one or more third parties, BBOT’s future product revenue will suffer, and BBOT may incur significant additional losses. A variety of risks associated with marketing BBOT’s product candidates internationally could materially adversely affect BBOT’s business. BBOT may seek regulatory approval of its product candidates outside of the U.S. and, accordingly, BBOT expects that it will be subject to additional risks related to operating in foreign countries if BBOT obtains the necessary approvals, including: • differing regulatory requirements and reimbursement regimes in foreign countries, such as the lack of pathways for accelerated drug approval, may result in foreign regulatory approvals taking longer and being more costly than obtaining approval in the U.S.; • foreign regulatory authorities may disagree with the design, implementation or results of BBOT’s clinical trials or BBOT’s interpretation of data from preclinical studies or clinical trials; • approval policies or regulations of foreign regulatory authorities may significantly change in a manner rendering BBOT’s clinical data insufficient for approval; • the impact of pandemics or other public health emergencies, natural disasters and geopolitical events on BBOT’s ability to produce its product candidates and conduct clinical trials in foreign countries; • unexpected changes in tariffs, trade barriers, price and exchange controls and other regulatory requirements; • economic weakness, including inflation, or political instability in particular foreign economies and markets; • compliance with legal requirements applicable to privacy, data protection, information security and other matters; • compliance with tax, employment, immigration and labor laws for employees living or traveling abroad; • foreign taxes, including withholding of payroll taxes; • foreign currency fluctuations, which could result in increased operating expenses and reduced revenue, and other obligations incident to doing business in another country; • difficulties staffing and managing foreign operations; • complexities associated with managing multiple payor reimbursement regimes and government payors in foreign countries; • workforce uncertainty in countries where labor unrest is more common than in the U.S.; • potential liability under the FCPA or comparable foreign regulations; • challenges enforcing BBOT’s contractual and intellectual property rights, especially in those foreign countries that do not respect and protect intellectual property rights to the same extent as the U.S.; • production shortages resulting from any events affecting raw material supply or manufacturing capabilities abroad; and • business interruptions resulting from geopolitical events, including war and terrorism, trade policies, treaties and tariffs. These and other risks associated with international operations may materially adversely affect BBOT’s ability to attain or maintain profitable operations. 75 Table of Contents Changes in tax law could adversely affect BBOT’s business and financial condition. The rules dealing with U.S. federal, state, and local income taxation are constantly under review by persons involved in the legislative process and by the Internal Revenue Service, the U.S. Treasury Department and other applicable tax authorities. Changes to tax laws (which changes may have retroactive application) could adversely affect BBOT or holders of BBOT common stock. In recent years, many such changes have been made and changes are likely to continue to occur in the future. Future changes in tax laws could have a material adverse effect on BBOT’s business, cash flow, financial condition or results of operations. BBOT’s ability to utilize its net operating loss carryforwards and certain other tax attributes to offset future taxable income may be limited. BBOT’s federal net operating loss (“NOL”) carryforwards may be unavailable to offset future taxable income because of restrictions under U.S. tax law. Under the Tax Cut and Jobs Act, as amended by the Coronavirus Aid, Relief, and Economic Security Act, BBOT’s federal NOLs may be carried forward indefinitely, but for taxable years beginning after December 31, 2020, the deductibility of federal NOL carryforwards generated in tax years beginning after December 31, 2017 is limited to 80% of BBOT’s current year taxable income. As of December 31, 2025, BBOT had available federal NOL carryforwards of approximately $148.8 million and available state NOL carryforwards of approximately $129.8 million. In addition, under Section 382 of the Internal Revenue Code of 1986, as amended, if a corporation undergoes an “ownership change” (generally defined as a cumulative change in the corporation’s ownership by “5-percent shareholders” that exceeds 50 percentage points (by value) over a rolling three-year period), the corporation’s ability to use its pre-change NOL carryforwards and certain other pre-change tax attributes to offset its post-change taxable income may be limited. Similar rules may apply under state tax laws. BBOT may have experienced such ownership changes in the past, and BBOT may experience ownership changes in the future as a result of shifts in BBOT’s stock ownership, some of which are outside BBOT’s control. There is also a risk that due to regulatory changes, such as suspensions on the use of NOL carryforwards, or other unforeseen reasons, BBOT’s existing NOL carryforwards could expire or otherwise be unavailable to offset future income tax liabilities. BBOT’s ability to utilize BBOT’s NOL carryforwards could have a material adverse effect on BBOT’s cash flows and results of operations. If BBOT engages in future acquisitions or strategic partnerships, this may increase BBOT’s capital requirements, dilute BBOT’s stockholders, cause BBOT to incur debt or assume contingent liabilities, and subject BBOT to other risks. From time to time, BBOT evaluates various acquisition opportunities and strategic partnerships, including licensing or acquiring complementary products, product candidates, intellectual property rights, technologies or businesses. Any potential acquisition or strategic partnership may entail numerous risks, including: • increased operating expenses and cash requirements; • the assumption of additional indebtedness or contingent liabilities; • the issuance of BBOT’s equity securities; • assimilation of operations, intellectual property, products and product candidates of an acquired company, including difficulties associated with integrating new personnel; • the diversion of BBOT’s management’s attention from its existing programs and initiatives in pursuing such a strategic merger or acquisition; • retention of key employees, the loss of key personnel and uncertainties in BBOT’s ability to maintain key business relationships; • risks and uncertainties associated with the other party to such a transaction, including the prospects of that party and their existing products, product candidates and marketing approvals; and • BBOT’s inability to generate revenue from acquired technology and/or products sufficient to meet BBOT’s objectives in undertaking the acquisition or even to offset the associated acquisition and maintenance costs. In addition, if BBOT undertakes acquisitions or pursues partnerships in the future, BBOT may issue dilutive securities, assume or incur debt obligations, incur large one-time expenses and acquire intangible assets that could result in significant future amortization expense. Adverse events in the field of oncology or the biopharmaceutical industry could damage public perception of BBOT’s current or future product candidates and negatively affect BBOT’s business. 76 Table of Contents The commercial success of BBOT’s products, if approved, will depend in part on public acceptance of the use of targeted cancer therapies. While a number of targeted cancer therapies have received regulatory approval and are being commercialized, BBOT’s approach to targeting cancer cells carrying tumor causing mutations, including oncogenic RAS pathway mutations, is novel and unproven. Adverse events in clinical trials of BBOT’s product candidates, or post-marketing activities, or in clinical trials of others developing similar products or that are related to approved targeted therapies, particularly those targeting oncogenic RAS pathway mutations, including sotorasib and adagrasib and the resulting publicity, as well as any other adverse events in the field of oncology that may occur in the future, could result in a decrease in demand for any product that BBOT may develop. If public perception is influenced by claims that the use of cancer therapies is unsafe, whether related to BBOT therapies or those of BBOT’s competitors, BBOT’s product candidates or products, if approved, may not be accepted by the general public or the medical community. Future adverse events in oncology or the biopharmaceutical industry could also result in greater government regulation, stricter labeling requirements and potential regulatory delays in the testing or approvals of BBOT’s products. Any increased scrutiny could delay or increase the costs of obtaining marketing approval for BBOT’s current or future product candidates. Risks Related to BBOT’s Intellectual Property Derivation proceedings may be necessary to determine priority of inventions, and an unfavorable outcome may require BBOT to cease using the related technology or to attempt to license rights from the prevailing party. Derivation proceedings provoked by third parties or brought by BBOT or declared by the U.S. Patent and Trademark Office (“USPTO”) may be necessary to determine the priority of inventions with respect to one or more of BBOT’s patents or patent applications or those of BBOT’s future licensors. An unfavorable outcome may require BBOT to cease using the related technology or to attempt to license rights to it from the prevailing party. BBOT’s business could be adversely affected if the prevailing party does not offer BBOT a license on commercially reasonable terms. BBOT’s defense of derivation proceedings may fail and, even if successful, may result in substantial costs and distract BBOT’s management and other employees. In addition, the uncertainties associated with such proceedings could have a material adverse effect on BBOT’s ability to raise the funds necessary to continue BBOT’s clinical trials and development programs, license necessary technology from third parties or enter into development or manufacturing partnerships that would help BBOT bring its product candidates to market. If BBOT is unable to obtain, maintain and enforce patent protection for its technology and product candidates, or if the scope of the patent protection obtained is not sufficiently broad, BBOT’s competitors could develop and commercialize technology and products similar or identical to BBOT’s, and BBOT’s ability to successfully develop and commercialize its technology and product candidates may be adversely affected. BBOT’s success depends in large part on its ability to obtain and maintain protection of the intellectual property rights BBOT owns (either solely and jointly with others), or may in the future license from third parties (in particular, worldwide patents relating to any proprietary technology and product candidates BBOT develops). BBOT seeks to protect its proprietary position by filing patent applications in the U.S. and select other countries related to its technologies and product candidates that are important to its business and by in-licensing intellectual property related to such technologies and product candidates. BBOT does not yet have issued patents for all of its most advanced product candidates in all markets in which BBOT may commercialize them, but BBOT continues to actively pursue patent protection for its technology and product candidates in certain jurisdictions around the world. However, BBOT cannot guarantee that patents will be granted with respect to any of its pending patent applications or with respect to any patent applications BBOT may file in the future, nor can BBOT be sure that any patents that may be granted to BBOT in the future will be commercially useful in protecting BBOT’s products, or the methods of use or manufacture of those products. If BBOT is unable to obtain and maintain meaningful patent protection in jurisdictions important to BBOT’s business for its product candidates, their respective components, formulations, combination therapies, methods used to manufacture them and methods of treatment, or other proprietary technologies, BBOT’s business, financial condition, results of operations and prospects could be adversely affected. The patent prosecution process is expensive, time-consuming and complex, and BBOT may not be able to file, prosecute, maintain or defend all necessary or desirable patent applications at a reasonable cost or in a timely manner. It is also possible that BBOT will fail to identify patentable aspects of its research and development output before it is too late to obtain patent protection. Moreover, in some circumstances involving technology that BBOT may license from third parties, BBOT may not have the sole right to control the preparation, filing and prosecution of patent applications or to maintain, enforce and defend the in-licensed patents. Therefore, any in-licensed patents and applications may not be prepared, filed, prosecuted, maintained, defended and enforced in a manner consistent with the best interests of BBOT’s business. The patent rights of pharmaceutical and biotechnology companies, like BBOT, generally are highly uncertain, involve complex legal and factual questions and have been the subject of much litigation in recent years. No consistent policy regarding the breadth of claims allowed in biotechnology and pharmaceutical patents, particularly those related to oncology, has emerged in the U.S. The relevant patent laws and their interpretation outside of the U.S. are also uncertain. Various courts, including the U.S. Supreme Court, have 77 Table of Contents rendered decisions that affect the scope of patent eligibility of certain inventions or discoveries relating to biotechnology. These decisions conclude, among other things, that abstract ideas, natural phenomena and laws of nature are not themselves patent eligible subject matter. Precisely what constitutes a law of nature or abstract idea is uncertain, and certain aspects of BBOT’s technology could be considered ineligible for patenting under applicable law. In addition, the scope of patent protection outside the U.S. is uncertain, and laws of foreign countries may not protect BBOT’s rights to the same extent as the laws of the U.S. or vice versa. For example, European patent law precludes the patentability of methods of treatment of the human body by surgery or therapy. BBOT cannot predict whether the patent applications BBOT is currently pursuing will issue as patents that protect BBOT’s technology and product candidates, in whole or in part, in any particular jurisdiction or whether the claims of any issued patents will provide sufficient protection from competitors. Changes in either the patent laws or interpretation of the patent laws in the U.S. or other countries may diminish the value of BBOT’s patents and its ability to obtain, protect, maintain, defend and enforce BBOT’s patent rights, narrow the scope of BBOT’s patent protection and, more generally, affect the value or narrow the scope of BBOT’s patent rights. Further, third parties may have intellectual property rights relating to BBOT’s product candidates of which BBOT is unaware. For example, third parties may have blocking patents that could be used to prevent BBOT from commercializing its product candidates and practicing its proprietary technology. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the U.S. and other jurisdictions are typically not published until 18 months after filing, or in some cases are not published at all. Therefore, neither BBOT nor its future licensors can know with certainty whether either BBOT or its future licensors were the first to make the inventions claimed in the patent applications BBOT owns or any patents or patent applications BBOT may own or in-license in the future, or that either BBOT or any of its future licensors were the first to file for patent protection of such inventions. As a result, the issuance, scope, validity, enforceability and commercial value of BBOT’s owned and future in-licensed patent rights are uncertain. For example, currently unpublished patent applications may later publish and limit BBOT’s ability to obtain valid and enforceable patents. Moreover, any issued patents BBOT does obtain or in-license may be challenged, invalidated, or circumvented. BBOT or its future licensors may be subject to a third-party pre-issuance submission of prior art to the USPTO, or to a foreign patent office, or become involved in opposition, derivation, revocation, reexamination, inter partes review, post-grant review or interference proceedings challenging BBOT’s patent rights or the patent rights of others. An adverse determination in any such submission, proceeding or litigation could reduce the scope of, or invalidate, BBOT’s patent rights, allow third parties to commercialize BBOT’s technology or product candidates and compete directly with BBOT, without payment to BBOT, or result in BBOT’s inability to manufacture or commercialize its products without infringing third-party patent rights. If the breadth or strength of protection provided by any patents BBOT obtains and patent applications is threatened, regardless of the outcome, it could d