HELIX ENERGY SOLUTIONS GROUP INC 10-Q

Item 1. Financial Statements HELIX ENERGY SOLUTIONS GROUP, INC. AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ December 31, ​ 2024 2023 ​ ​ (Unaudited) ​ ​ ​ ASSETS ​ ​ Current assets: ​ ​ Cash and cash equivalents ​ $ 275,066 ​ $ 332,191 Accounts receivable, net of allowance for credit losses of $ 3,836 and $ 3,407 , respectively ​ 283,636 ​ 280,427 Other current assets ​ 65,213 ​ 85,223 Total current assets ​ 623,915 ​ 697,841 Property and equipment ​ 3,073,582 ​ 3,078,571 Less accumulated depreciation ​ ( 1,572,770 ) ​ ( 1,505,722 ) Property and equipment, net ​ 1,500,812 ​ 1,572,849 Operating lease right-of-use assets ​ 347,608 ​ 169,233 Deferred recertification and dry dock costs, net ​ ​ 78,044 ​ ​ 71,290 Other assets, net ​ 46,558 ​ 44,823 Total assets ​ $ 2,596,937 ​ $ 2,556,036 ​ ​ ​ ​ ​ ​ ​ LIABILITIES AND SHAREHOLDERS' EQUITY ​ ​ Current liabilities: ​ ​ Accounts payable ​ $ 144,830 ​ $ 134,552 Accrued liabilities ​ 88,662 ​ 203,112 Current maturities of long-term debt ​ 8,965 ​ 48,292 Current operating lease liabilities ​ 57,717 ​ 62,662 Total current liabilities ​ 300,174 ​ 448,618 Long-term debt ​ 309,664 ​ 313,430 Operating lease liabilities ​ 302,941 ​ 116,185 Deferred tax liabilities ​ 120,169 ​ 110,555 Other non-current liabilities ​ 67,201 ​ 66,248 Total liabilities ​ 1,100,149 ​ 1,055,036 Commitments and contingencies ​ ​ ​ ​ ​ ​ Shareholders’ equity: ​ ​ Common stock, no par, 240,000 shares authorized, 152,051 and 152,291 shares issued, respectively ​ 1,267,768 ​ 1,271,565 Retained earnings ​ 318,452 ​ 312,450 Accumulated other comprehensive loss ​ ( 89,432 ) ​ ( 83,015 ) Total shareholders’ equity ​ 1,496,788 ​ 1,501,000 Total liabilities and shareholders’ equity ​ $ 2,596,937 ​ $ 2,556,036 ​ The accompanying notes are an integral part of these condensed consolidated financial statements. ​ 3 Table of Contents HELIX ENERGY SOLUTIONS GROUP, INC. AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) (in thousands, except per share amounts) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ June 30, ​ June 30, ​ 2024 2023 2024 2023 Net revenues ​ $ 364,797 ​ $ 308,817 ​ $ 661,008 ​ $ 558,901 Cost of sales ​ 289,311 ​ 253,468 ​ 565,968 ​ 488,368 Gross profit ​ 75,486 ​ 55,349 ​ 95,040 ​ 70,533 Gain (loss) on disposition of assets, net ​ — ​ — ​ ( 150 ) ​ 367 Acquisition and integration costs ​ ​ — ​ ​ ( 309 ) ​ ​ — ​ ​ ( 540 ) Change in fair value of contingent consideration ​ ​ — ​ ​ ( 10,828 ) ​ ​ — ​ ​ ( 14,820 ) Selling, general and administrative expenses ​ ( 22,293 ) ​ ( 24,007 ) ​ ( 42,973 ) ​ ( 43,638 ) Income from operations ​ 53,193 ​ 20,205 ​ 51,917 ​ 11,902 Net interest expense ​ ( 5,891 ) ​ ( 4,228 ) ​ ( 11,368 ) ​ ( 8,415 ) Losses related to convertible senior notes ​ — ​ — ​ ( 20,922 ) ​ — Other expense, net ​ ( 382 ) ​ ( 5,740 ) ​ ( 2,598 ) ​ ( 2,296 ) Royalty income and other ​ 94 ​ 175 ​ 2,000 ​ 2,038 Income before income taxes ​ 47,014 ​ 10,412 ​ 19,029 ​ 3,229 Income tax provision ​ 14,725 ​ 3,312 ​ 13,027 ​ 1,294 Net income ​ $ 32,289 ​ $ 7,100 ​ $ 6,002 ​ $ 1,935 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Earnings per share of common stock: ​ ​ ​ ​ Basic ​ $ 0.21 ​ $ 0.05 ​ $ 0.04 ​ $ 0.01 Diluted ​ $ 0.21 ​ $ 0.05 ​ $ 0.04 ​ $ 0.01 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average common shares outstanding: ​ ​ ​ ​ Basic ​ 152,234 ​ 150,791 ​ 152,301 ​ 151,275 Diluted ​ 155,024 ​ 153,404 ​ 155,072 ​ 153,873 ​ The accompanying notes are an integral part of these condensed consolidated financial statements. ​ HELIX ENERGY SOLUTIONS GROUP, INC. AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ June 30, ​ June 30, ​ 2024 2023 ​ 2024 2023 Net income ​ $ 32,289 ​ $ 7,100 ​ $ 6,002 $ 1,935 Other comprehensive income (loss), net of tax: ​ ​ ​ ​ Foreign currency translation gain (loss) ​ 266 ​ 12,285 ​ ( 6,417 ) ​ 20,717 Other comprehensive income (loss), net of tax ​ 266 ​ 12,285 ​ ( 6,417 ) ​ 20,717 Comprehensive income (loss) ​ $ 32,555 ​ $ 19,385 ​ $ ( 415 ) $ 22,652 ​ The accompanying notes are an integral part of these condensed consolidated financial statements. ​ 4 Table of Contents HELIX ENERGY SOLUTIONS GROUP, INC. AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (UNAUDITED) (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ Total ​ ​ Common Stock ​ Retained ​ Comprehensive ​ Shareholders’ ​ Shares Amount Earnings Loss Equity Balance, March 31, 2024 152,450 ​ $ 1,270,357 ​ $ 286,163 ​ $ ( 89,698 ) ​ $ 1,466,822 Net income — ​ — ​ 32,289 ​ — ​ 32,289 Foreign currency translation adjustments — ​ — ​ — ​ 266 ​ 266 Repurchases of common stock ( 475 ) ​ ( 5,186 ) ​ — ​ — ​ ( 5,186 ) Activity in company stock plans, net and other 76 ​ 769 ​ — ​ — ​ 769 Share-based compensation — ​ 1,828 ​ — ​ — ​ 1,828 Balance, June 30, 2024 152,051 ​ $ 1,267,768 ​ $ 318,452 ​ $ ( 89,432 ) ​ $ 1,496,788 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, March 31, 2023 151,494 ​ $ 1,294,484 ​ $ 318,123 ​ $ ( 96,887 ) ​ $ 1,515,720 Net income — ​ — ​ 7,100 ​ — ​ 7,100 Foreign currency translation adjustments — ​ — ​ — ​ 12,285 ​ 12,285 Repurchases of common stock ​ ( 750 ) ​ ​ ( 5,123 ) ​ ​ — ​ ​ — ​ ​ ( 5,123 ) Activity in company stock plans, net and other 66 ​ 446 ​ — ​ — ​ 446 Share-based compensation — ​ 1,500 ​ — ​ — ​ 1,500 Balance, June 30, 2023 150,810 ​ $ 1,291,307 ​ $ 325,223 ​ $ ( 84,602 ) ​ $ 1,531,928 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Accumulated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ Total ​ ​ Common Stock ​ Retained ​ Comprehensive ​ Shareholders’ ​ Shares Amount Earnings Loss Equity Balance, December 31, 2023 152,291 ​ $ 1,271,565 ​ $ 312,450 ​ $ ( 83,015 ) ​ $ 1,501,000 Net income — ​ — ​ 6,002 ​ — ​ 6,002 Foreign currency translation adjustments — ​ — ​ — ​ ( 6,417 ) ​ ( 6,417 ) Settlement of convertible debt conversion — ​ ( 84 ) ​ — ​ — ​ ( 84 ) Repurchases of common stock ( 938 ) ​ ( 10,218 ) ​ — ​ — ​ ( 10,218 ) Termination of capped calls — ​ 4,381 ​ — ​ — ​ 4,381 Activity in company stock plans, net and other 698 ​ ( 1,302 ) ​ — ​ — ​ ( 1,302 ) Share-based compensation — ​ 3,426 ​ — ​ — ​ 3,426 Balance, June 30, 2024 152,051 ​ $ 1,267,768 ​ $ 318,452 ​ $ ( 89,432 ) ​ $ 1,496,788 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance, December 31, 2022 151,935 ​ $ 1,298,740 ​ $ 323,288 ​ $ ( 105,319 ) ​ $ 1,516,709 Net income — ​ — ​ 1,935 ​ — ​ 1,935 Foreign currency translation adjustments — ​ — ​ — ​ 20,717 ​ 20,717 Repurchases of common stock ​ ( 1,410 ) ​ ​ ( 10,129 ) ​ ​ — ​ ​ — ​ ​ ( 10,129 ) Activity in company stock plans, net and other 285 ​ ( 296 ) ​ — ​ — ​ ( 296 ) Share-based compensation — ​ 2,992 ​ — ​ — ​ 2,992 Balance, June 30, 2023 150,810 ​ $ 1,291,307 ​ $ 325,223 ​ $ ( 84,602 ) ​ $ 1,531,928 ​ The accompanying notes are an integral part of these condensed consolidated financial statements. ​ 5 Table of Contents HELIX ENERGY SOLUTIONS GROUP, INC. AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six Months Ended ​ ​ ​ June 30, ​ ​ 2024 2023 Cash flows from operating activities: ​ ​ ​ Net income ​ $ 6,002 ​ $ 1,935 ​ Adjustments to reconcile net income to net cash provided by operating activities: ​ ​ ​ ​ Depreciation and amortization ​ 89,824 ​ 76,764 ​ Amortization of debt discount ​ 107 ​ — ​ Amortization of debt issuance costs ​ 1,110 ​ 1,199 ​ Share-based compensation ​ 3,689 ​ 3,169 ​ Deferred income taxes ​ 9,613 ​ 981 ​ (Gain) loss on disposition of assets, net ​ 150 ​ ( 367 ) ​ Losses related to convertible senior notes ​ 20,922 ​ — ​ Unrealized foreign currency loss ​ 2,114 ​ 2,815 ​ Change in fair value of contingent consideration ​ ​ — ​ ​ 14,820 ​ Changes in operating assets and liabilities: ​ ​ ​ Accounts receivable, net ​ ( 5,621 ) ​ ( 36,651 ) ​ Other current assets ​ ​ 19,020 ​ ​ ( 12,189 ) ​ Income tax payable, net of income tax receivable ​ ( 2,164 ) ​ ( 3,930 ) ​ Accounts payable and accrued liabilities ​ ( 75,150 ) ​ 55,728 ​ Deferred recertification and dry dock costs, net ​ ​ ( 20,330 ) ​ ​ ( 41,335 ) ​ Other, net ​ 3,034 ​ ( 36,830 ) ​ Net cash provided by operating activities ​ 52,320 ​ 26,109 ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from investing activities: ​ ​ ​ Capital expenditures ​ ( 7,594 ) ​ ( 7,920 ) ​ Proceeds from sale of assets ​ ​ — ​ ​ 365 ​ Proceeds from insurance recoveries ​ 363 ​ — ​ Net cash used in investing activities ​ ( 7,231 ) ​ ( 7,555 ) ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from financing activities: ​ ​ ​ Payments related to convertible senior notes ​ ( 60,720 ) ​ — ​ Repayment of MARAD Debt ​ ( 4,322 ) ​ ( 4,116 ) ​ Proceeds from settlement of capped calls ​ 4,381 ​ — ​ Debt issuance costs ​ ( 1,091 ) ​ ( 100 ) ​ Repurchases of common stock ​ ​ ( 10,189 ) ​ ​ ( 10,059 ) ​ Payments related to tax withholding for share-based compensation ​ ( 4,003 ) ​ ( 1,385 ) ​ Proceeds from issuance of ESPP shares ​ 1,118 ​ 590 ​ Payment of earn-out consideration ​ ​ ( 26,700 ) ​ ​ — ​ Net cash used in financing activities ​ ( 101,526 ) ​ ( 15,070 ) ​ ​ ​ ​ ​ ​ ​ ​ ​ Effect of exchange rate changes on cash and cash equivalents ​ ( 688 ) ​ ( 9,944 ) ​ Net decrease in cash and cash equivalents ​ ( 57,125 ) ​ ( 6,460 ) ​ Cash and cash equivalents: ​ ​ ​ Balance, beginning of year ​ 332,191 ​ 189,111 ​ Balance, end of period ​ $ 275,066 ​ $ 182,651 ​ ​ The accompanying notes are an integral part of these condensed consolidated financial statements. ​ 6 Table of Contents HELIX ENERGY SOLUTIONS GROUP, INC. AND SUBSIDIARIES NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) ​ Note 1 — Basis of Presentation and New Accounting Standards The accompanying condensed consolidated financial statements include the accounts of Helix Energy Solutions Group, Inc. and its subsidiaries (collectively, “Helix”). Unless the context indicates otherwise, the terms “we,” “us” and “our” in this report refer collectively to Helix and its subsidiaries. All material intercompany accounts and transactions have been eliminated. These unaudited condensed consolidated financial statements in U.S. dollars have been prepared in accordance with instructions for the Quarterly Report on Form 10-Q required to be filed with the Securities and Exchange Commission (the “SEC”) and do not include all information and footnotes normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The preparation of these financial statements requires us to make estimates and judgments that affect the amounts reported in the financial statements and the related disclosures. Actual results may differ from our estimates. We have made all adjustments, which, unless otherwise disclosed, are of normal recurring nature, that we believe are necessary for a fair presentation of the condensed consolidated balance sheets, statements of operations, statements of comprehensive loss, statements of shareholders’ equity and statements of cash flows, as applicable. The operating results for the three- and six-month periods ended June 30, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024. Our balance sheet as of December 31, 2023 included herein has been derived from the audited balance sheet as of December 31, 2023 included in our 2023 Annual Report on Form 10-K (our “2023 Form 10-K”). These unaudited condensed consolidated financial statements should be read in conjunction with the audited annual consolidated financial statements and notes thereto included in our 2023 Form 10-K. Certain reclassifications were made to previously reported amounts in the consolidated financial statements and notes thereto to make them consistent with the current presentation format. New accounting standards In November 2023, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2023-07, “Improvements to Reportable Segment Disclosures,” which requires entities to disclose, on an annual and interim basis, significant segment expenses that are regularly provided to the chief operating decision maker (the “CODM”) and included within each reported measure of segment profit or loss as well as an amount for other segment items by reportable segment and a description of its composition. ASU No. 2023-07 requires all annual disclosures about a reportable segment’s profit or loss and assets to be provided in interim periods as well. Among other things, this ASU also requires that a public entity disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. ASU No. 2023-07 will be effective on a retrospective basis for annual periods beginning January 1, 2024 and for interim periods beginning January 1, 2025. This ASU is not expected to have a material impact on our consolidated financial statements other than increased disclosure requirements. In December 2023, the FASB issued ASU No. 2023-09, “Improvements to Income Tax Disclosures,” which requires entities to disclose, on an annual basis, specific categories in a tabular rate reconciliation using both percentages and reporting currency amounts and to provide additional information for reconciling items that meet a quantitative threshold. This ASU also requires that entities disclose on an annual basis: a) income taxes paid (net) disaggregated by federal, state and foreign taxes, b) income taxes paid (net) by individual jurisdiction, c) income (or loss) from continuing operations before income tax expense (or benefit) between domestic and foreign, and d) income tax expense (or benefit) from continuing operations by federal, state and foreign. Certain previous disclosure requirements on unrecognized tax benefits and cumulative amount of temporary differences are eliminated. ASU No. 2023-09 will be effective for us for annual periods beginning January 1, 2025. This ASU is not expected to have a material impact on our consolidated financial statements other than increased disclosure requirements. We do not expect other recently issued accounting standards to have a material impact on our financial position, results of operations or cash flows when they become effective. ​ 7 Table of Contents Note 2 — Company Overview We are an international offshore energy services company that provides specialty services to the offshore energy industry, with a focus on well intervention, robotics and decommissioning operations. Our services are key in supporting a global energy transition: ● Production maximization — our assets and methodologies are specifically designed to efficiently enhance and extend the lives of existing oil and gas reserves; we also offer an alternative to take over end-of-life reserves in preparation for their abandonment; ● Decommissioning — we are a full-field abandonment contractor and believe that regulatory push for plug and abandonment (“P&A”) and transition to renewable energy will facilitate the continued growth of the abandonment market; and ● Renewables — we are an established global leader in jet trenching and provide specialty support services to renewable energy developments such as offshore wind farms, including boulder removal and unexploded ordnance clearance. We provide a range of services to the oil and gas and renewable energy markets primarily in the Gulf of Mexico (deepwater and shelf), U.S. East Coast, Brazil, North Sea, Asia Pacific and West Africa regions. Our North Sea operations and our Gulf of Mexico shelf operations are usually subject to seasonal changes in demand, which generally peaks in the summer months and declines in the winter months. Our services are segregated into four reportable business segments: Well Intervention, Robotics, Shallow Water Abandonment and Production Facilities. Our Well Intervention segment provides services enabling our customers to safely access subsea offshore wells for the purpose of performing production enhancement or decommissioning operations, thereby mitigating the need to drill new wells by extending the useful lives of existing wells and preserving the environment by preventing uncontrolled releases of oil and natural gas. Our well intervention vessels include the Q4000 , the Q5000 , the Q7000 , the Seawell , the Well Enhancer , and two chartered monohull vessels, the Siem H elix 1 and the Siem Helix 2 . Our well intervention equipment includes intervention systems such as intervention riser systems (“IRSs”), subsea intervention lubricators (“SILs”) and the Riserless Open-water Abandonment Module, some of which we provide on a stand-alone basis. Our Robotics segment provides trenching, seabed clearance, offshore construction and inspection, repair and maintenance (“IRM”) services to both the oil and gas and the renewable energy markets globally, thereby assisting the delivery of renewable energy and supporting the responsible transition away from a carbon-based economy. Additionally, our robotics services are used in and complement our well intervention services. Our Robotics segment includes remotely operated vehicles (“ROVs”), trenchers, IROV boulder grabs and robotics support vessels under term charters as well as spot vessels as needed. We offer our ROVs, trenchers and IROV boulder grabs on a stand-alone basis or on an integrated basis with chartered robotics support vessels. Our Shallow Water Abandonment segment provides services in support of the upstream and midstream ‎industries predominantly in the Gulf of Mexico shelf, including offshore oilfield decommissioning and ‎reclamation, project management, engineered solutions, intervention, maintenance, repair, heavy lift and commercial diving services. Our Shallow Water Abandonment segment includes Helix Alliance that was acquired in July 2022, which offers a diversified fleet of marine assets including liftboats, offshore supply vessels (“OSVs”), dive support vessels (“DSVs”), a heavy lift derrick barge, a crew boat, P&A systems and coiled tubing (“CT”) systems. Our Production Facilities segment includes the Helix Producer I (the “ HP I ”), a ship-shaped dynamically positioned floating production vessel, the Helix Fast Response System (the “HFRS”), which combines the HP I , the Q4000 and the Q5000 with certain well control equipment that can be deployed to respond to a well control incident, and our ownership of mature oil and gas properties. All of our current Production Facilities activities are located in the Gulf of Mexico. ​ 8 Table of Contents Note 3 — Details of Certain Accounts Other current assets consist of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ December 31, ​ 2024 2023 Prepaids ​ $ 21,963 $ 28,352 Contract assets (Note 8) ​ ​ 10,031 ​ ​ 5,824 Deferred costs (Note 8) ​ 22,546 ​ 36,041 Other ​ 10,673 ​ 15,006 Total other current assets ​ $ 65,213 $ 85,223 ​ Other assets, net consist of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ December 31, ​ 2024 2023 Prepaid charter (1) ​ $ 12,544 $ 12,544 Deferred costs (Note 8) ​ ​ 1,584 ​ 587 Other receivable (2) ​ 26,864 ​ 25,623 Intangible assets with finite lives, net ​ 3,878 ​ 4,105 Other ​ 1,688 ​ 1,964 Total other assets, net ​ $ 46,558 $ 44,823 (1) Represents prepayments to the owner of the Siem Helix 1 and the Siem Helix 2 to offset certain payment obligations associated with the vessels at the end of their respective charter term. (2) Represents the present value of the agreed-upon amounts that we are entitled to receive from Marathon Oil Corporation (“Marathon Oil”) for remaining P&A work to be performed by us on Droshky oil and gas properties we acquired from Marathon Oil in 2019. ​ Accrued liabilities consist of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ December 31, ​ 2024 2023 Accrued payroll and related benefits ​ $ 36,134 $ 59,010 Accrued interest ​ ​ 10,379 ​ ​ 4,181 Income tax payable ​ 112 ​ 1,938 Deferred revenue (Note 8) ​ 17,087 ​ 32,763 Earn-out consideration (1) ​ — ​ 85,000 Other (2) ​ 24,950 ​ 20,220 Total accrued liabilities ​ $ 88,662 $ 203,112 (1) Represents the final amount of the earn-out consideration associated with the acquisition of the Alliance group of companies (collectively “Alliance”) on July 1, 2022, which was paid to the seller of Alliance in cash on April 3, 2024. (2) Amounts as of June 30, 2024 and December 31, 2023 included $ 11.6 million and $ 9.0 million, respectively, of credits towards future services that we granted for the purchase of five P&A systems and other assets . ​ Other non-current liabilities consist of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ December 31, ​ 2024 2023 Asset retirement obligations (Note 12) ​ $ 64,150 $ 61,356 Other (1) ​ 3,051 ​ 4,892 Total other non-current liabilities ​ $ 67,201 $ 66,248 (1) Amount as of December 31, 2023 included $ 2.6 million of credits offered by us in exchange for the purchase of P&A equipment (see above). ​ 9 Table of Contents ​ Note 4 — Leases We charter vessels and lease facilities and equipment under non-cancelable contracts that expire on various dates through 2034. The following table details the components of our lease cost (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ June 30, ​ June 30, ​ 2024 2023 2024 2023 Operating lease cost ​ $ 22,357 ​ $ 17,347 ​ $ 42,832 $ 34,353 Variable lease cost ​ 3,060 ​ 5,255 ​ 6,117 ​ 10,165 Short-term lease cost ​ 13,745 ​ 17,916 ​ 22,659 ​ 24,893 Sublease income ​ ( 22 ) ​ ( 206 ) ​ ( 44 ) ​ ( 537 ) Net lease cost ​ $ 39,140 ​ $ 40,312 ​ $ 71,564 $ 68,874 ​ Maturities of our operating lease liabilities as of June 30, 2024 are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Facilities and ​ ​ ​ Vessels Equipment Total Less than one year ​ $ 76,796 ​ $ 6,452 $ 83,248 One to two years ​ 74,553 ​ 2,279 ​ 76,832 Two to three years ​ 61,771 ​ 1,968 ​ 63,739 Three to four years ​ 60,482 ​ 1,885 ​ 62,367 Four to five years ​ 52,748 ​ 1,714 ​ 54,462 Over five years ​ 112,848 ​ 4,231 ​ 117,079 Total lease payments ​ $ 439,198 ​ $ 18,529 $ 457,727 Less: imputed interest ​ ( 93,830 ) ​ ( 3,239 ) ​ ( 97,069 ) Total operating lease liabilities ​ $ 345,368 ​ $ 15,290 $ 360,658 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current operating lease liabilities ​ $ 51,750 ​ $ 5,967 $ 57,717 Non-current operating lease liabilities ​ 293,618 ​ 9,323 ​ 302,941 Total operating lease liabilities ​ $ 345,368 ​ $ 15,290 $ 360,658 ​ Maturities of our operating lease liabilities as of December 31, 2023 are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Facilities and ​ ​ ​ Vessels Equipment Total Less than one year ​ $ 67,488 ​ $ 6,639 $ 74,127 One to two years ​ 55,453 ​ 3,508 ​ 58,961 Two to three years ​ 35,200 ​ 1,289 ​ 36,489 Three to four years ​ 26,245 ​ 1,272 ​ 27,517 Four to five years ​ 3,040 ​ 1,244 ​ 4,284 Over five years ​ — ​ 1,926 ​ 1,926 Total lease payments ​ $ 187,426 ​ $ 15,878 $ 203,304 Less: imputed interest ​ ( 22,419 ) ​ ( 2,038 ) ​ ( 24,457 ) Total operating lease liabilities ​ $ 165,007 ​ $ 13,840 $ 178,847 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current operating lease liabilities ​ $ 56,602 ​ $ 6,060 $ 62,662 Non-current operating lease liabilities ​ 108,405 ​ 7,780 ​ 116,185 Total operating lease liabilities ​ $ 165,007 ​ $ 13,840 $ 178,847 ​ 10 Table of Contents The following table presents the weighted average remaining lease term and discount rate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ December 31, ​ 2024 ​ 2023 Weighted average remaining lease term 6.1 years ​ 3.1 years Weighted average discount rate 7.93 % ​ 8.20 % ​ The following table presents other information related to our operating leases (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six Months Ended ​ ​ June 30, ​ 2024 2023 Cash paid for operating lease liabilities ​ $ 38,877 $ 32,964 Right-of-use assets obtained in exchange for new operating lease liabilities (1) ​ 207,511 ​ 6,234 (1) Our operating lease additions during the six-month period ended June 30, 2024 are primarily related to the charter extensions for the Siem Helix 1 , the Siem Helix 2 , the Grand Canyon II and the Shelia Bordelon (Note 13). Our operating lease additions during the six-month period ended June 30, 2023 are primarily related to the vessel charter for the Glomar Wave . ​ Note 5 — Long-Term Debt Scheduled maturities of our long-term debt outstanding as of June 30, 2024 are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ MARAD ​ 2029 ​ ​ ​ ​ Debt Notes Total Less than one year ​ $ 8,965 ​ $ — $ 8,965 One to two years ​ 9,412 ​ — ​ 9,412 Two to three years ​ 9,881 ​ — ​ 9,881 Three to four years ​ — ​ — ​ — Four to five years ​ — ​ — ​ — Over five years ​ — ​ 300,000 ​ 300,000 Gross debt ​ 28,258 ​ 300,000 ​ 328,258 Unamortized debt discount (1) ​ ​ — ​ ​ ( 1,297 ) ​ ​ ( 1,297 ) Unamortized debt issuance costs (1) ​ ( 1,342 ) ​ ( 6,990 ) ​ ( 8,332 ) Total debt ​ 26,916 ​ 291,713 ​ 318,629 Less current maturities ​ ( 8,965 ) ​ — ​ ( 8,965 ) Long-term debt ​ $ 17,951 ​ $ 291,713 $ 309,664 (1) Debt discount and debt issuance costs are amortized to interest expense over the term of the applicable debt agreement. ​ Below is a summary of our indebtedness: Credit Agreement On September 30, 2021 we entered into an asset-based credit agreement with Bank of America, N.A. (“Bank of America”), Wells Fargo Bank, N.A. and Zions Bancorporation and subsequently we entered into amendments to the credit agreement on July 1, 2022, June 23, 2023 and November 15, 2023 (collectively, the “Amended ABL Facility”). The Amended ABL Facility provides a $ 120 million asset-based revolving credit facility, which matures on September 30, 2026 , with a springing maturity 91 days prior to the maturity of any outstanding indebtedness with a principal amount in excess of $ 50 million. The Amended ABL Facility also permits us to request an increase of the facility by up to $ 30 million, subject to certain conditions. 11 Table of Contents Commitments under the Amended ABL Facility are comprised of separate U.S. and U.K. revolving credit facility commitments of $ 85 million and $ 35 million, respectively. The Amended ABL Facility provides funding based on a borrowing base calculation that includes eligible U.S. and U.K. customer accounts receivable and cash, and provides for a $ 20 million sub-limit for the issuance of letters of credit. As of June 30, 2024, we had no borrowings under the Amended ABL Facility, and our available borrowing capacity, based on the borrowing base, totaled $ 95.1 million, net of $ 3.3 million of letters of credit issued. We and certain of our U.S. and U.K. subsidiaries are the current borrowers under the Amended ABL Facility, whose obligations under the Amended ABL Facility are guaranteed by those borrowers and certain other U.S. and U.K. subsidiaries, excluding Cal Dive I – Title XI, Inc. (“CDI Title XI”), Helix Offshore Services Limited and certain other enumerated subsidiaries. Other subsidiaries may be added as guarantors of the facility in the future. The Amended ABL Facility is secured by all accounts receivable and designated deposit accounts of the U.S. borrowers and guarantors, and by substantially all of the assets of the U.K. borrowers and guarantors. U.S. borrowings under the Amended ABL Facility bear interest at the Term SOFR rate (also known as CME Term SOFR as administered by CME Group, Inc.) plus a margin of 1.50 % to 2.00 % or at a base rate plus a margin of 0.50 % to 1.00 %. U.K. borrowings under the Amended ABL Facility denominated in U.S. dollars bear interest at the Term SOFR rate with SOFR adjustment of 0.10 % and U.K. borrowings denominated in the British pound bear interest at the SONIA daily rate, each plus a margin of 1.50 % to 2.00 %. We also pay a commitment fee of 0.375 % to 0.50 % per annum on the unused portion of the facility. The Amended ABL Facility includes certain limitations on our ability to incur additional indebtedness, grant liens on assets, pay dividends and make distributions on equity interests, dispose of assets, make investments, repay certain indebtedness, engage in mergers, and other matters, in each case subject to certain exceptions. The Amended ABL Facility contains customary default provisions which, if triggered, could result in acceleration of all amounts then outstanding. The Amended ABL Facility requires us to satisfy and maintain a fixed charge coverage ratio of not less than 1.0 to 1.0 if availability is less than the greater of 10 % of the borrowing base or $ 12 million. The Amended ABL Facility also (i) limits the amount of permitted debt for the deferred purchase price of property not to exceed $ 50 million, and (ii) provides for potential ESG-related pricing adjustments based on specific metrics and performance targets determined by us and Bank of America, as agent with respect to the Amended ABL Facility. MARAD Debt In 2005, Helix’s subsidiary CDI – Title XI issued its U.S. Government Guaranteed Ship Financing Bonds, Q4000 Series, to refinance the construction financing originally granted in 2002 of the Q4000 vessel (the “MARAD Debt”). The MARAD Debt is guaranteed by the U.S. government pursuant to Title XI of the Merchant Marine Act of 1936, administered by the Maritime Administration (“MARAD”). The obligation of CDI Title XI to reimburse MARAD in the event CDI Title XI fails to repay the MARAD Debt is collateralized by the Q4000 and is guaranteed 50 % by us. In addition, we have agreed to bareboat charter the Q4000 from CDI Title XI for so long as the MARAD Debt remains outstanding. The MARAD Debt is payable in equal semi-annual installments through February 2027 and bears interest at a rate of 4.93 %. We believe the agreements relating to the bonds and the terms and conditions of our obligations to MARAD in respect of the MARAD Debt were typical for U.S. government-guaranteed ship financing transactions when they were entered into, including customary restrictions on incurring additional liens on the Q4000 and trading restrictions with respect to the vessel as well as working capital requirements. Senior Notes Due 2029 (“2029 Notes”) On December 1, 2023, we issued $ 300 million aggregate principal amount of the 2029 Notes. The net proceeds from the issuance of the 2029 Notes were approximately $ 291.1 million, after deducting the purchasers’ discount and debt issuance costs. We used cash proceeds from the offering to retire the Convertible Senior Notes due 2026 (the “2026 Notes”). See details regarding the 2026 Notes below. The 2029 Notes bear interest at a coupon interest rate of 9.75 % per annum payable semi-annually in arrears on March 1 and September 1 of each year, beginning on March 1, 2024. The 2029 Notes mature on March 1, 2029 unless earlier redeemed or repurchased by us. 12 Table of Contents Prior to March 1, 2026, we may, at our option, redeem the 2029 Notes, in whole or in part, at a price equal to 100 % of the aggregate principal amount of the notes to be redeemed, plus a make-whole premium and accrued and unpaid interest, if any, to, but excluding, the redemption date. On or after March 1, 2026, we may, at our option, redeem the 2029 Notes, in whole or in part, at the redemption prices (expressed as percentages of the principal amount of the notes to be redeemed) set forth below, plus accrued and unpaid interest, if any, to, but excluding, the redemption date. Prior to March 1, 2026, following certain equity offerings we may, at our option, on any one or more occasions, redeem up to 40 % of the 2029 Notes at a price equal to 109.750 % of the aggregate principal amount of the notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date, in an amount not exceeding the proceeds of such equity offerings. ​ ​ ​ ​ ​ ​ Redemption Year Price 2026 ​ 104.875 % 2027 ​ 102.438 % 2028 and thereafter ​ 100.000 % ​ Upon the occurrence of a Change of Control Triggering Event, as defined in the indenture governing the 2029 Notes, we may be required to make an offer to repurchase all of the notes then outstanding at a price equal to 101 % of the principal amount thereof, plus accrued and unpaid interest, if any, to, but not including, the repurchase date. The indenture governing the 2029 Notes contains customary terms and covenants, including limitations on additional indebtedness, restricted payments, liens, asset sales, transactions with affiliates, mergers and consolidations, designation of unrestricted subsidiaries, and dividend and other restrictions affecting restricted subsidiaries. The 2029 Notes are guaranteed on a senior unsecured basis by the subsidiaries that guarantee the Amended ABL Facility, as well as certain future subsidiaries that may guarantee certain of our indebtedness, including the Amended ABL Facility. The 2029 Notes are junior in right of payment to all our existing and future secured indebtedness and obligations and rank equally in right of payment with all our existing and future senior unsecured indebtedness. The 2029 Notes rank senior in right of payment to any of our future subordinated indebtedness and are fully and unconditionally guaranteed by the guarantors described above on a senior basis. 2026 Notes During December 2023 and the first quarter 2024, we retired the 2026 Notes through various transactions using proceeds from the 2029 Notes as well as the issuance of our common stock. In December 2023, we entered into privately negotiated agreements with certain holders of the 2026 Notes to repurchase $ 159.8 million aggregate principal amount of the 2026 Notes (the “2026 Notes Repurchases”) for 1.5 million shares of our common stock and aggregate cash payments of $ 229.7 million, plus accrued and unpaid cash interest of $ 3.8 million. We recognized pre-tax inducement charges of $ 37.4 million for the 2026 Notes Repurchases in the fourth quarter 2023, representing the total settlement value in excess of the total conversion value of the 2026 Notes Repurchases when the final negotiated offers were accepted. The conversion value paid in excess of the carrying amount of the 2026 Notes Repurchases is reflected in “Common stock” in the shareholders’ equity section of the accompanying condensed consolidated balance sheets. In December 2023, $ 0.2 million aggregate principal amount of the 2026 Notes was tendered for conversion. We settled the conversions for $ 0.3 million cash in March 2024. The conversion value paid in excess of the $ 0.2 million carrying amount of the 2026 Notes that were tentered for conversion is reflected in “Common stock” in the shareholders’ equity section of the accompanying condensed consolidated balance sheet. 13 Table of Contents In January 2024, we issued a notice for the redemption of the remaining $ 40.0 million aggregate principal amount of the 2026 Notes to be settled in March 2024 (the “2026 Notes Redemptions”). The redemption price consisted of the principal amount and the make-whole premium, plus accrued and unpaid interest. Our redemption notice enabled holders of $ 39.7 million aggregate principal amount of the 2026 Notes to tender their notes for conversion prior to the redemption date, with the remaining $ 0.3 million aggregate principal amount of the notes redeemed. We settled both the conversions and redemptions for an aggregate $ 60.2 million cash in March 2024 and recognized pre-tax losses of $ 20.9 million. These losses are reflected in “Losses related to convertible senior notes” in the accompanying condensed consolidated statement of operations. The 2026 Notes had a coupon interest rate of 6.75 % per annum and an effective interest rate of 7.6 %. For the six-month period ended June 30, 2024, total interest expense related to the 2026 Notes was $ 0.4 million with coupon interest expense of $ 0.3 million and the amortization of debt issuance costs of $ 0.1 million. For the three- and six-month periods ended June 30, 2023, total interest expense related to the 2026 Notes was $ 3.7 million and $ 7.4 million, respectively, with coupon interest expense of $ 3.4 million and $ 6.8 million, respectively, and the amortization of debt issuance costs of $ 0.3 million and $ 0.6 million, respectively. 2026 Capped Calls In connection with the 2026 Notes offering, we had entered into capped call transactions (the “2026 Capped Calls”) with three separate counterparties to hedge the dilution risk of the 2026 Notes. Concurrently with the 2026 Notes Repurchases in December 2023, we terminated a proportionate amount of the 2026 Capped Calls and received $ 15.6 million in cash, recognizing an increase to “Common stock” of $ 14.2 million and a $ 1.4 million gain. Concurrent with the settlement of the 2026 Notes Redemptions in March 2024, we terminated the remaining 2026 Capped Calls and received $ 4.4 million in cash, recognizing an increase to “Common stock” in the shareholders’ equity section of the accompanying condensed consolidated balance sheet. Other In accordance with the Amended ABL Facility, the MARAD Debt and the 2029 Notes, we are required to comply with certain covenants, including minimum liquidity and a springing fixed charge coverage ratio (applicable under certain conditions that are currently not applicable) with respect to the Amended ABL Facility and the maintenance of net worth, working capital and debt-to-equity requirements with respect to the MARAD Debt. As of June 30, 2024, we were in compliance with these covenants. The Convertible Senior Notes due 2023 (the “2023 Notes”) matured on September 15, 2023. Upon maturity of the 2023 Notes, we paid $ 29.6 million in cash to settle the conversion of $ 29.2 million aggregate principal amount of the notes, plus accrued and unpaid interest. We recorded the conversion value in excess of such principal amount converted to “Common stock” in the accompanying condensed consolidated balance sheets. Notes representing the remaining $ 0.8 million aggregate principal amount of the 2023 Notes were redeemed at par, plus accrued and unpaid interest. The 2023 Notes had a coupon interest rate of 4.125 % per annum and an effective interest rate of 4.8 %. For the three- and six-month periods ended June 30, 2023, total interest expense related to the 2023 Notes was $ 0.3 million and $ 0.7 million, respectively, primarily from coupon interest expense. The following table details the components of our net interest expense (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ June 30, ​ June 30, ​ 2024 2023 2024 2023 Interest expense ​ $ 8,402 ​ $ 4,857 ​ $ 17,180 $ 9,726 Interest income ​ ( 2,511 ) ​ ( 629 ) ​ ( 5,812 ) ​ ( 1,311 ) Net interest expense ​ $ 5,891 ​ $ 4,228 ​ $ 11,368 $ 8,415 ​ ​ 14 Table of Contents Note 6 — Income Taxes We operate in multiple jurisdictions with complex tax laws subject to interpretation and judgment. We believe that our application of such laws and the tax impact thereof are reasonable and fairly presented in our condensed consolidated financial statements. For the three- and six-month periods ended June 30, 2024, we recognized income tax provision of $ 14.7 million and $ 13.0 million, respectively, resulting in effective tax rates of 31.3 % and 68.5 %, respectively. The effective tax rate for the three-month period ended June 30, 2024 was higher than the U.S. statutory rate primarily due to certain non-deductible expenses and non-creditable foreign income taxes. The effective rate for the six-month period ended June 30, 2024 was higher than the U.S. statutory rate primarily due to the non-deductibility of certain losses associated with the 2026 Notes Redemptions, which was characterized as a discrete event and reported in the first quarter. For the three- and six-month periods ended June 30, 2023, we recognized income tax expense of $ 3.3 million and $ 1.3 million, respectively, resulting in effective tax rates of 31.8 % and 40.1 %, respectively. The effective tax rates for these periods were higher than the U.S. statutory rate primarily due to certain non-deductible expenses and non-creditable foreign income taxes. ​ ​ ​ ​ Note 7 — Share Repurchase Programs In February 2023, our Board of Directors (our “Board”) authorized a share repurchase program to repurchase issued and outstanding shares of our common stock up to $ 200 million (the “2023 Repurchase Program”). During the six-month period ended June 30, 2024, we repurchased a total of 937,585 shares of our common stock pursuant to the 2023 Repurchase Program for approximately $ 10.2 million or an average of $ 10.87 per share. The 2023 Repurchase Program has no set expiration date. Repurchases under the 2023 Repurchase Program have been made through open market purchases in compliance with Rule 10b-18 under the Exchange Act, but may also be made through privately negotiated transactions or plans, instructions or contracts established under Rule 10b5-1 under the Exchange Act. The manner, timing and amount of any purchase will be determined by management at its discretion based on an evaluation of market conditions, stock price, liquidity and other factors. The 2023 Repurchase Program does not obligate us to acquire any particular amount of common stock and may be modified or superseded at any time at our discretion. Any repurchased shares are cancelled. ​ 15 Table of Contents Note 8 — Revenue from Contracts with Customers Disaggregation of Revenue Our service contracts generally contain provisions for specific time, material and equipment charges that are billed in accordance with the terms of such contracts (dayrate contracts) but we occasionally contract on a lump sum basis (lump sum contracts). We record revenues net of taxes collected from customers and remitted to governmental authorities. Our revenues are primarily derived from short-term and long-term service contracts with customers. Contracts are classified as long-term if all or part of the contract is to be performed over a period extending beyond 12 months from the effective date of the contract. Long-term contracts may include multi-year agreements whereby the commitment for services in any one year may be short in duration. The following table provides information about disaggregated revenue by contract duration (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Well ​ ​ ​ Shallow Water ​ Production ​ Intercompany ​ Total ​ Intervention Robotics Abandonment Facilities Eliminations Revenue Three months ended June 30, 2024 ​ ​ ​ ​ ​ ​ ​ Short-term ​ $ 153,152 ​ $ 44,193 ​ $ 42,369 ​ $ — ​ $ ( 106 ) ​ $ 239,608 Long-term ​ 71,527 ​ 37,056 ​ 8,472 ​ 25,400 ​ ( 17,266 ) ​ 125,189 Total ​ $ 224,679 ​ $ 81,249 ​ $ 50,841 ​ $ 25,400 ​ $ ( 17,372 ) ​ $ 364,797 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ Short-term ​ $ 75,621 ​ $ 38,069 ​ $ 74,116 ​ $ — ​ $ ( 26 ) ​ $ 187,780 Long-term ​ 78,600 ​ 31,981 ​ 2,190 ​ 23,128 ​ ( 14,862 ) ​ 121,037 Total ​ $ 154,221 ​ $ 70,050 ​ $ 76,306 ​ $ 23,128 ​ $ ( 14,888 ) ​ $ 308,817 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024 ​ ​ ​ ​ ​ ​ ​ Short-term ​ $ 287,566 ​ $ 69,369 ​ $ 67,732 ​ $ — ​ $ ( 6,433 ) ​ $ 418,234 Long-term ​ 153,572 ​ 62,189 ​ 9,962 ​ 49,552 ​ ( 32,501 ) ​ 242,774 Total ​ $ 441,138 ​ $ 131,558 ​ $ 77,694 ​ $ 49,552 ​ $ ( 38,934 ) ​ $ 661,008 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ Short-term ​ $ 153,388 ​ $ 73,274 ​ $ 123,497 ​ $ — ​ $ ( 26 ) ​ $ 350,133 Long-term ​ 143,271 ​ 45,998 ​ 2,190 ​ 44,033 ​ ( 26,724 ) ​ 208,768 Total ​ $ 296,659 ​ $ 119,272 ​ $ 125,687 ​ $ 44,033 ​ $ ( 26,750 ) ​ $ 558,901 ​ 16 Table of Contents We provide services to our customers in the following markets that are key to our energy transition strategy: Production maximization, Decommissioning and Renewables. The following table provides information about disaggregated revenue by market strategy (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Well ​ ​ ​ Shallow Water ​ Production ​ Intercompany ​ Total ​ Intervention Robotics Abandonment Facilities Eliminations Revenue Three months ended June 30, 2024 ​ ​ ​ ​ ​ ​ ​ Production maximization ​ $ 109,302 ​ $ 20,596 ​ $ 3,009 ​ $ 25,400 ​ $ ( 7,819 ) ​ $ 150,488 Decommissioning ​ 109,640 ​ 7,099 ​ 47,832 ​ — ​ ( 3,641 ) ​ 160,930 Renewables ​ 4,269 ​ 50,493 ​ — ​ — ​ ( 4,269 ) ​ 50,493 Other ​ 1,468 ​ 3,061 ​ — ​ — ​ ( 1,643 ) ​ 2,886 Total ​ $ 224,679 ​ $ 81,249 ​ $ 50,841 ​ $ 25,400 ​ $ ( 17,372 ) ​ $ 364,797 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ Production maximization ​ $ 52,882 ​ $ 21,309 ​ $ 3,562 ​ $ 23,128 ​ $ ( 4,608 ) ​ $ 96,273 Decommissioning ​ 96,176 ​ 11,873 ​ 72,744 ​ — ​ ( 4,943 ) ​ 175,850 Renewables ​ 3,384 ​ 35,885 ​ — ​ — ​ ( 3,384 ) ​ 35,885 Other ​ 1,779 ​ 983 ​ — ​ — ​ ( 1,953 ) ​ 809 Total ​ $ 154,221 ​ $ 70,050 ​ $ 76,306 ​ $ 23,128 ​ $ ( 14,888 ) ​ $ 308,817 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2024 ​ ​ ​ ​ ​ ​ ​ Production maximization ​ $ 179,751 ​ $ 39,032 ​ $ 6,251 ​ $ 49,552 ​ $ ( 19,211 ) ​ $ 255,375 Decommissioning ​ 252,325 ​ 12,511 ​ 71,443 ​ — ​ ( 10,569 ) ​ 325,710 Renewables ​ 6,773 ​ 74,665 ​ — ​ — ​ ( 6,773 ) ​ 74,665 Other ​ 2,289 ​ 5,350 ​ — ​ — ​ ( 2,381 ) ​ 5,258 Total ​ $ 441,138 ​ $ 131,558 ​ $ 77,694 ​ $ 49,552 ​ $ ( 38,934 ) ​ $ 661,008 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six months ended June 30, 2023 ​ ​ ​ ​ ​ ​ ​ Production maximization ​ $ 100,149 ​ $ 48,028 ​ $ 6,969 ​ $ 44,033 ​ $ ( 8,425 ) ​ $ 190,754 Decommissioning ​ 188,796 ​ 22,921 ​ 118,718 ​ — ​ ( 10,014 ) ​ 320,421 Renewables ​ 4,710 ​ 44,563 ​ — ​ — ​ ( 4,710 ) ​ 44,563 Other ​ 3,004 ​ 3,760 ​ — ​ — ​ ( 3,601 ) ​ 3,163 Total ​ $ 296,659 ​ $ 119,272 ​ $ 125,687 ​ $ 44,033 ​ $ ( 26,750 ) ​ $ 558,901 ​ Contract Balances Contract assets are rights to consideration in exchange for services that we have provided to a customer when those rights are conditioned on our future performance. Contract assets generally consist of (i) demobilization fees recognized ratably over the contract term but invoiced upon completion of the demobilization activities and (ii) revenue recognized in excess of the amount billed to the customer for lump sum contracts when the cost-to-cost method of revenue recognition is utilized. Contract assets are reflected in “Other current assets” in the accompanying condensed consolidated balance sheets (Note 3). Contract assets were $ 10.0 million as of June 30, 2024 and $ 5.8 million as of December 31, 2023. We had no credit losses on our contract assets for the three- and six-month periods ended June 30, 2024 and 2023. Contract liabilities are obligations to provide future services to a customer for which we have already received, or have the unconditional right to receive, the consideration for those services from the customer. Contract liabilities may consist of (i) advance payments received from customers, including upfront mobilization fees allocated to a single performance obligation and recognized ratably over the contract term and/or (ii) amounts billed to the customer in excess of revenue recognized for lump sum contracts when the cost-to-cost method of revenue recognition is utilized. Contract liabilities are reflected as “Deferred revenue,” a component of “Accrued liabilities” in the accompanying condensed consolidated balance sheets (Note 3). Contract liabilities totaled $ 17.1 million as of June 30, 2024 and $ 32.8 million as of December 31, 2023. Revenue recognized for the three- and six-month periods ended June 30, 2024 included $ 18.2 million and $ 31.0 million, respectively, that were included in the contract liability balance at the beginning of each period. Revenue recognized for the three- and six-month periods ended June 30, 2023 included $ 9.4 million and $ 8.0 million, respectively, that were included in the contract liability balance at the beginning of each period. 17 Table of Contents We report the net contract asset or contract liability position on a contract-by-contract basis at the end of each reporting period. Performance Obligations As of June 30, 2024, approximately $ 873.3 million related to unsatisfied performance obligations was expected to be recognized as revenue in the future, with $ 443.4 million, $ 403.8 million and $ 26.0 million in 2024 , 2025 and 2026 , respectively. These amounts include fixed consideration and estimated variable consideration for both wholly and partially unsatisfied performance obligations, including mobilization and demobilization fees. These amounts are derived from the specific terms of our contracts, and the expected timing for revenue recognition is based on the estimated start date and duration of each contract according to the information known at June 30, 2024. For the three- and six-month periods ended June 30, 2024 and 2023, revenues recognized from performance obligations satisfied (or partially satisfied) in previous periods were immaterial. Contract Fulfillment Costs Contract fulfillment costs consist of costs incurred in fulfilling a contract with a customer. Our contract fulfillment costs primarily relate to costs incurred for mobilization of personnel and equipment at the beginning of a contract and costs incurred for demobilization at the end of a contract. Mobilization costs are deferred and amortized ratably over the contract term (including anticipated contract extensions) based on the pattern of the provision of services to which the contract fulfillment costs relate. Demobilization costs are recognized when incurred at the end of the contract. Deferred contract costs are reflected as “Deferred costs,” a component of “Other current assets” and “Other assets, net” in the accompanying condensed consolidated balance sheets (Note 3). Our deferred contract costs totaled $ 24.1 million as of June 30, 2024 and $ 36.6 million as of December 31, 2023. For the three- and six-month periods ended June 30, 2024, we recorded $ 11.0 million and $ 31.3 million, respectively, related to amortization of these deferred contract costs. For the three- and six-month periods ended June 30, 2023, we recorded $ 14.4 million and $ 19.1 million, respectively, related to amortization of these deferred contract costs. There were no associated impairment losses for any period presented. For additional information regarding revenue recognition, see Notes 2 and 11 to our 2023 Form 10-K. ​ Note 9 — Earnings Per Share We have shares of restricted stock issued and outstanding that are currently unvested. Because holders of shares of unvested restricted stock are entitled to the same liquidation and dividend rights as the holders of our unrestricted common stock, we are required to compute earnings per share (“EPS”) under the two-class method in periods in which we have earnings. Under the two-class method, net income for each period is allocated based on the participation rights of both common shareholders and the holders of any participating securities as if earnings for the respective periods had been distributed. For periods in which we have a net loss we do not use the two-class method as holders of our restricted shares are not obligated to share in such losses. 18 Table of Contents Basic EPS is computed by dividing net income allocated to common shareholders or net loss by the weighted average shares of our common stock outstanding. Diluted EPS is computed in a similar manner after considering the potential dilutive effect of share-based awards and convertible senior notes and taking the more dilutive of the two-class method and the treasury stock method or if-converted method, as applicable. The dilutive effect of share-based awards is computed using the treasury stock method, as applicable, which includes the incremental shares that would be hypothetically vested in excess of the number of shares assumed to be hypothetically repurchased with the assumed proceeds. The effect of convertible senior notes is computed for the periods in which they are outstanding using the if-converted method, if dilutive, which assumes conversion of the convertible senior notes into shares of our common stock at the beginning of the period, giving income recognition for the add-back of related interest expense (net of tax). The computations of the numerator (earnings or loss) and denominator (shares) to derive the basic and diluted EPS amounts presented on the face of the accompanying condensed consolidated statements of operations are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Three Months Ended ​ ​ June 30, 2024 ​ June 30, 2023 ​ Income Shares Income Shares Basic: ​ ​ Net income ​ $ 32,289 ​ ​ $ 7,100 Less: Undistributed earnings allocated to participating securities ​ ( 33 ) ​ ​ ​ ( 12 ) Net income available to common shareholders, basic ​ $ 32,256 ​ 152,234 ​ $ 7,088 150,791 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted: ​ ​ ​ Net income available to common shareholders, basic ​ $ 32,256 ​ 152,234 ​ $ 7,088 150,791 Effect of dilutive securities: ​ ​ ​ Share-based awards other than participating securities ​ — ​ 2,790 ​ — 2,613 Undistributed earnings reallocated to participating securities ​ 1 ​ — ​ — — Net income available to common shareholders, diluted ​ $ 32,257 ​ 155,024 ​ $ 7,088 ​ 153,404 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Earnings per share, basic and diluted ​ $ 0.21 ​ ​ ​ $ 0.05 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six Months Ended ​ Six Months Ended ​ ​ June 30, 2024 ​ June 30, 2023 ​ Income Shares Income Shares Basic: ​ ​ Net income ​ $ 6,002 ​ ​ $ 1,935 Less: Undistributed earnings allocated to participating securities ​ ( 6 ) ​ ​ ​ ( 3 ) Net income available to common shareholders, basic ​ $ 5,996 ​ 152,301 ​ $ 1,932 151,275 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Diluted: ​ ​ ​ Net income available to common shareholders, basic ​ $ 5,996 ​ 152,301 ​ $ 1,932 151,275 Effect of dilutive securities: ​ ​ ​ Share-based awards other than participating securities ​ — ​ 2,771 ​ — 2,598 Net income available to common shareholders, diluted ​ $ 5,996 ​ 155,072 ​ $ 1,932 153,873 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Earnings per share, basic and diluted ​ $ 0.04 ​ ​ ​ $ 0.01 ​ ​ ​ The following potentially dilutive shares related to the 2023 Notes and the 2026 Notes were excluded from the diluted EPS calculation as they were anti-dilutive (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ June 30, ​ June 30, ​ 2024 2023 2024 2023 2023 Notes — 3,168 — 3,168 2026 Notes — 28,676 2,594 28,676 ​ 19 Table of Contents We have outstanding restricted stock units (“RSUs”) (Note 10) that can be settled in either cash or shares of our common stock or a combination thereof, which are not included in the computation of diluted EPS as cash settlement is assumed. ​ Note 10 — Employee Benefit Plans Long-Term Incentive Plan We currently have one active long-term incentive plan: the 2005 Long-Term Incentive Plan, as amended and restated (the “2005 Incentive Plan”). On May 15, 2024, our shareholders approved an amendment to and restatement of the 2005 Incentive Plan, which, among other things, authorizes 7.0 million additional shares for issuance pursuant to our equity incentive compensation strategy. As of June 30, 2024, there were approximately 9.5 million shares of our common stock available for issuance under the 2005 Incentive Plan. During the six-month period ended June 30, 2024, the following grants of share-based awards were made under the 2005 Incentive Plan: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Grant Date ​ ​ ​ ​ ​ ​ ​ ​ Fair Value ​ ​ Date of Grant Award Type Shares/Units Per Share/Unit Vesting Period/Vesting Date January 1, 2024 (1) RSU 375,730 ​ $ 10.28 33 % per year over three years January 1, 2024 (1) PSU 351,410 ​ $ 12.30 100 % on December 31, 2026 January 1, 2024 (2) Restricted stock 5,776 ​ $ 10.28 100 % on January 1, 2026 April 1, 2024 (2) Restricted stock 2,595 ​ $ 10.84 100 % on January 1, 2026 (1) Reflects grants to our executive officers. (2) Reflects grants to certain independent members of our Board who have elected to take their quarterly fees in stock in lieu of cash. ​ Restricted stock awards are based solely on service conditions and are accounted for as equity awards. Compensation cost for restricted stock is the product of the grant date fair value of each share and the number of shares granted and is recognized over the applicable vesting period on a straight-line basis. Forfeitures are recognized as they occur. No restricted stock awards have been granted to our executive officers or other employees since 2020. For each of the three- and six-month periods ended June 30, 2024 and 2023, we recognized $ 0.3 million and $ 0.6 million, respectively, as share-based compensation related to restricted stock. Our performance share units (“PSUs”) granted beginning in January 2021 may be settled in either cash or shares of our common stock upon vesting at the discretion of the Compensation Committee of our Board and have been accounted for as equity awards. Those PSUs consist of two components: (i) 50 % based on the performance of our common stock against peer group companies, which component contains a service and a market condition, and (ii) 50 % based on cumulative total Free Cash Flow, which component contains a service and a performance condition. Free Cash Flow is calculated as cash flows from operating activities less capital expenditures, net of proceeds from sale of assets. Our PSUs cliff vest at the end of a three-year period with the maximum amount of the award being 200 % of the original PSU awards and the minimum amount being zero . For PSUs with a service and a market condition that are accounted for as equity awards, compensation cost is measured based on the grant date estimated fair value determined using a Monte Carlo simulation model and subsequently recognized over the vesting period on a straight-line basis. For PSUs with a service and a performance condition that are accounted for as equity awards, compensation cost is initially measured based on the grant date fair value. Cumulative compensation cost is subsequently adjusted at the end of each reporting period to reflect the current estimation of achieving the performance condition. For the three- and six-month periods ended June 30, 2024, $ 1.5 million and $ 2.8 million, respectively, were recognized as share-based compensation related to PSUs. For the three- and six-month periods ended June 30, 2023, $ 1.2 million and $ 2.4 million, respectively, were recognized as share-based compensation related to PSUs. In the first quarter 2024, based on the performance of our common stock price as compared to our performance peer group and our cumulative total Free Cash Flow, in each case over a three-year performance period, 452,381 PSUs granted in 2021 vested at 181 %, representing 818,812 shares of our common stock with a total market value of $ 8.4 million. 20 Table of Contents Our currently outstanding RSUs may be settled in either cash or shares of our common stock upon vesting at the discretion of the Compensation Committee and have been accounted for as liability awards. Liability RSUs are measured at their estimated fair value based on the closing share price of our common stock as of each balance sheet date, and subsequent changes in the fair value of the awards are recognized in earnings for the portion of the award for which the requisite service period has elapsed. Cumulative compensation cost for vested liability RSUs equals the actual payout value upon vesting. For the three- and six-month periods ended June 30, 2024, $ 2.1 million and $ 3.7 million, respectively, were recognized as compensation cost. For the three- and six-month periods ended June 30, 2023, $ 1.2 million and $ 2.4 million, respectively, were recognized as compensation cost. In 2024 and 2023, we granted fixed-value cash awards of $ 6.1 million and $ 6.0 million, respectively, to select management employees under the 2005 Incentive Plan. The value of these cash awards is recognized on a straight-line basis over a vesting period of three years . For the three- and six-month periods ended June 30, 2024, $ 1.3 million and $ 2.7 million, respectively, were recognized as compensation cost. For the three- and six-month periods ended June 30, 2023, $ 1.2 million and $ 2.4 million, respectively, were recognized as compensation cost. Defined Contribution Plans We sponsor a defined contribution 401(k) retirement plan (the “401(k) Plan”) in the U.S. We also contribute to various other defined contribution plans globally. For the three- and six-month periods ended June 30, 2024, we made contributions to our defined contribution plans totaling $ 1.4 million and $ 2.8 million, respectively. For the three- and six-month periods ended June 30, 2023, we made contributions to our defined contribution plans totaling $ 1.0 million and $ 2.1 million, respectively. Employee Stock Purchase Plan (“ESPP”) As of June 30, 2024, 1.0 million shares were available for issuance under the ESPP. The ESPP currently has a purchase limit of 260 shares per employee per purchase period. For more information regarding our employee benefit plans, including the 2005 Incentive Plan, the defined contribution plans and the ESPP, see Note 13 to our 2023 Form 10-K. ​ 21 Table of Contents Note 11 — Business Segment Information We have four reportable business segments: Well Intervention, Robotics, Shallow Water Abandonment and Production Facilities. Our U.S., U.K. and Brazil Well Intervention operating segments are aggregated into the Well Intervention segment for financial reporting purposes. All material intercompany transactions between the segments have been eliminated. See Note 2 for more information on our business segments. We evaluate our performance based on operating income of each reportable segment. Certain financial data by reportable segment are summarized as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ June 30, ​ June 30, ​ 2024 2023 ​ 2024 2023 Net revenues — ​ ​ ​ ​ ​ Well Intervention ​ $ 224,679 ​ $ 154,221 ​ $ 441,138 ​ $ 296,659 Robotics ​ 81,249 ​ 70,050 ​ 131,558 ​ 119,272 Shallow Water Abandonment ​ ​ 50,841 ​ ​ 76,306 ​ ​ 77,694 ​ ​ 125,687 Production Facilities ​ 25,400 ​ 23,128 ​ 49,552 ​ 44,033 Intercompany eliminations ​ ( 17,372 ) ​ ( 14,888 ) ​ ( 38,934 ) ​ ( 26,750 ) Total ​ $ 364,797 ​ $ 308,817 ​ $ 661,008 ​ $ 558,901 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Income (loss) from operations — ​ ​ ​ ​ ​ Well Intervention ​ $ 29,299 ​ $ 3,380 ​ $ 47,978 ​ $ ( 4,763 ) Robotics ​ 28,400 ​ 17,467 ​ 33,850 ​ 22,561 Shallow Water Abandonment ​ ​ ( 281 ) ​ ​ 19,762 ​ ​ ( 12,709 ) ​ ​ 26,584 Production Facilities ​ 9,097 ​ 7,774 ​ 7,554 ​ 12,931 Segment operating income ​ 66,515 ​ 48,383 ​ 76,673 ​ 57,313 Change in fair value of contingent consideration ​ ​ — ​ ​ ( 10,828 ) ​ ​ — ​ ​ ( 14,820 ) Corporate, eliminations and other ​ ( 13,322 ) ​ ( 17,350 ) ​ ( 24,756 ) ​ ( 30,591 ) Total ​ $ 53,193 ​ $ 20,205 ​ $ 51,917 ​ $ 11,902 Net interest expense ​ ​ ( 5,891 ) ​ ​ ( 4,228 ) ​ ​ ( 11,368 ) ​ ​ ( 8,415 ) Losses related to convertible senior notes ​ ​ — ​ ​ — ​ ​ ( 20,922 ) ​ ​ — Other non-operating expense, net ​ ​ ( 288 ) ​ ​ ( 5,565 ) ​ ​ ( 598 ) ​ ​ ( 258 ) Income before income taxes ​ $ 47,014 ​ $ 10,412 ​ $ 19,029 ​ $ 3,229 ​ Intercompany segment amounts are derived primarily from equipment and services provided to other business segments. Intercompany segment revenues are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ June 30, ​ June 30, ​ 2024 2023 2024 2023 Well Intervention ​ $ 6,918 ​ $ 6,873 ​ $ 18,170 ​ $ 11,342 Robotics ​ 10,348 ​ 7,989 ​ 20,576 ​ 15,382 Shallow Water Abandonment ​ 106 ​ 26 ​ 188 ​ 26 Total ​ $ 17,372 ​ $ 14,888 ​ $ 38,934 ​ $ 26,750 ​ 22 Table of Contents Segment assets are comprised of all assets attributable to each reportable segment. Corporate and other includes all assets not directly identifiable with our business segments, most notably the majority of our cash and cash equivalents. The following table reflects total assets by reportable segment (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, ​ December 31, ​ 2024 2023 Well Intervention ​ $ 1,907,375 ​ $ 1,790,971 Robotics ​ 228,763 ​ 177,801 Shallow Water Abandonment ​ ​ 183,924 ​ ​ 256,356 Production Facilities ​ 115,050 ​ 120,234 Corporate and other ​ 161,825 ​ 210,674 Total ​ $ 2,596,937 ​ $ 2,556,036 ​ ​ Note 12 — Asset Retirement Obligations Our asset retirement obligations (“AROs”) relate to mature offshore oil and gas properties (Droshky and Thunder Hawk Field) that we acquired with the intention to perform decommissioning work at the end of their life cycles. AROs are recorded initially at fair value and consist of estimated costs for subsea infrastructure decommissioning and P&A activities associated with our oil and gas properties. The estimated costs are discounted to present value using a credit-adjusted risk-free discount rate. After its initial recognition, an ARO liability is increased for the passage of time as accretion expense, which is a component of our depreciation and amortization expense. An ARO liability may also change based on revisions in estimated costs and/or timing to settle the obligations. The following table describes the changes in our AROs (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 AROs at January 1, ​ $ 61,356 ​ $ 51,956 Accretion expense ​ 2,794 ​ 2,364 AROs at June 30, ​ $ 64,150 ​ $ 54,320 ​ ​ Note 13 — Commitments and Contingencies and Other Matters Commitments Our Well Intervention segment has long-term charter agreements with Siem Offshore AS for the Siem Helix 1 and Siem Helix 2 vessels, whose terms expire in December 2030 and December 2031, respectively. Our Robotics segment has vessel charters for the Grand Canyon II , the Grand Canyon III , the Shelia Bordelon , the North Sea Enabler and the Glomar Wave . Our time charter agreement for the Grand Canyon II expires in December 2030. Our time charter agreement for the Grand Canyon III expires in May 2028. Our time charter agreement for the Shelia Bordelon in the Gulf of Mexico expires in June 2026. Our time charter agreement for the North Sea Enabler expires in December 2025. We have a three-year charter agreement for the Glomar Wave in the North Sea that expires in 2025. Contingencies and Claims From time to time, we may incur losses related to our contracts for matters such as costs in excess of contract consideration or claims related to disputes with customers and any obligations thereunder. While we believe we maintain appropriate accruals for such matters, the actual cost to us may be more or less than the amounts reserved. We are involved in various legal proceedings in the normal couse of business, including claims under the General Maritime Laws of the United States and the Merchant Marine Act of 1920 (commonly referred to as the Jones Act), contract-related disputes, employee-related disputes and subsequently identified legacy issues related to Alliance. We recognize losses for lawsuits when the probability of an unfavorable outcome is probable and we can reasonably estimate the amount of the loss. For insured claims, we recognize such losses to the extent they exceed applicable insurance coverage. Although we can give no assurance about the outcome of litigation, claims or other proceedings, we do not currently believe that any loss resulting from litigation, claims or other proceedings, to the extent not otherwise covered by insurance, will have a material adverse impact on our consolidated financial statements. ​ 23 Table of Contents Note 14 — Statement of Cash Flow Information We define cash and cash equivalents as cash and all highly liquid financial instruments with original maturities of three months or less. The following table provides supplemental cash flow information (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six Months Ended ​ ​ June 30, ​ 2024 2023 Interest paid ​ $ 9,762 ​ $ 8,616 Income taxes paid (1) ​ 5,714 ​ 4,243 (1) Exclusive of any income tax refunds. ​ Our capital additions include the acquisition of property and equipment for which payment has not been made. These non-cash capital additions were $ 0.2 million at June 30, 2024 and $ 1.1 million at December 31, 2023. ​ Note 15 — Allowance for Credit Losses We estimate current expected credit losses on our accounts receivable at each reporting date based on our credit loss history, adjusted for current factors including global economic and business conditions, offshore energy industry and market conditions, customer mix, contract payment terms and past due accounts receivable. The following table sets forth the activity in our allowance for credit losses (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 2023 Balance at January 1, ​ $ 3,407 ​ $ 2,277 Additions (1) ​ 429 ​ 689 Balance at June 30, ​ $ 3,836 ​ $ 2,966 (1) Additions reflect reserves for expected credit losses during the respective periods. ​ Note 16 — Fair Value Measurements Our financial instruments include cash and cash equivalents, receivables, accounts payable and long-term debt. The carrying amount of cash and cash equivalents, trade and other current receivables as well as accounts payable approximates fair value due to the short-term nature of these instruments. The principal amount and estimated fair value of our long-term debt are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2024 ​ December 31, 2023 ​ ​ Principal ​ Fair ​ Principal ​ Fair ​ Amount (1) Value (2) Amount (1) Value (2) 2026 Notes (fully redeemed March 2024) ​ $ — ​ $ — ​ $ 40,199 ​ $ 64,117 MARAD Debt (matures February 2027) ​ ​ 28,258 ​ ​ 28,020 ​ ​ 32,580 ​ ​ 32,348 2029 Notes (mature March 2029) ​ ​ 300,000 ​ ​ 319,500 ​ ​ 300,000 ​ ​ 315,987 Total debt ​ $ 328,258 ​ $ 347,520 ​ $ 372,779 ​ $ 412,452 (1) Principal amount includes current maturities and excludes any related unamortized debt discount and debt issuance costs. See Note 5 for additional disclosures on our long-term debt. (2) The estimated fair value was determined using Level 2 fair value inputs under the market approach, which was determined using quotes in inactive markets. ​ ​ 24 Table of Contents