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We recognize accruals for any legal action when we conclude that a loss is probable and reasonably estimable.
−Removed: We did not have any material accruals for any active legal action in our condensed consolidated balance sheet as of March 31, 2025, as we could not predict the ultimate outcome of these matters, or reasonably estimate the potential exposure.
+Added: We did not have any material accruals for any active legal action in our condensed consolidated balance sheet as of June 30, 2025, as we could not predict the ultimate outcome of these matters, or reasonably estimate the potential exposure.
See Note 10, Commitments and Contingencies , to the condensed consolidated financial statements for details.
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• We are substantially dependent on the success of our lead products roxadustat and FG-3246 (in conjunction with our positron emission tomography imaging agent FG-3180).
−Removed: • Drug development and obtainment of marketing authorization are very difficult endeavors, and we may ultimately be unable to obtain regulatory approval for our various product candidates in one or more jurisdictions and one or more indications.
+Added: • Drug development and obtaining marketing authorization are very difficult endeavors, and we may ultimately be unable to obtain regulatory approval for our various product candidates in one or more jurisdictions and one or more indications.*
• Preclinical, Phase 1, and Phase 2 clinical trial results may not be indicative of the results that may be obtained in larger clinical trials.
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Risks Related to Our Reliance on Third Parties
−Removed: • If our collaborations were terminated or if our partners were unwilling or unable to contribute or participate in these collaborations, our ability to successfully develop and commercialize the relevant product candidate would suffer.*
+Added: • If our collaborations were terminated or if our partners were unwilling or unable to contribute or participate in the collaborations, our ability to successfully develop and commercialize the relevant product candidate would suffer.*
• If our preclinical and clinical trial contractors do not properly perform their agreed-upon obligations, we may not be able to obtain or may be delayed in receiving regulatory approvals for our product candidates.
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Risks Related to Our International Operations
−Removed: • If we are unable to consummate the sale of FibroGen International to AstraZeneca Treasury Limited, the trading price of our common stock and our business may be harmed.*
+Added: • If we are unable to consummate the sale of FibroGen International to AstraZeneca Treasury Limited, our operations, business conditions, and the trading price of our common stock and our business may be harmed.*
• We have established operations in China and there are a number of risks associated with international operations could materially and adversely affect our business.
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If our efforts in these programs are unsuccessful, it may materially and adversely affect our business and financial condition.
−Removed: Drug development and obtaining marketing authorization is a very difficult endeavor and we may ultimately be unable to obtain regulatory approval for our various product candidates in one or more jurisdictions and in one or more indications.
+Added: Drug development and obtaining marketing authorization are very difficult endeavors, and we may ultimately be unable to obtain regulatory approval for our various product candidates in one or more jurisdictions and in one or more indications.*
The development, manufacturing, marketing, and selling of our products and product candidates are and will continue to be subject to extensive and rigorous review and regulation by numerous government authorities in the United States of America (“U.S.”) and in other countries where we intend to develop and, if approved, market any product candidates.
−Removed: Before obtaining regulatory approval for the commercial sale of any product candidate, we must demonstrate through extensive preclinical trials and clinical trials that the product candidate is safe and effective for use in each indication for which approval is sought.
+Added: Before obtaining regulatory approval for the commercial sale of any product candidate, we must demonstrate through extensive preclinical trials and clinical trials that the product candidate is effective and has an acceptable safety profile for use in each indication for which approval is sought.
The drug development and approval processes are expensive and require substantial resources and time, and in general, very few product candidates that enter development ultimately receive regulatory approval.
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Regulatory authorities may take actions or impose requirements that delay, limit or deny approval of our product candidates for many reasons, including, among others:
−Removed: • our failure to adequately demonstrate to the satisfaction of regulatory authorities or an independent advisory committee that our product candidate is safe and effective in a particular indication, or that such product candidate’s clinical and other benefits outweigh its safety risks;
+Added: • our failure to adequately demonstrate to the satisfaction of regulatory authorities or an independent advisory committee that our product candidate is effective and has an acceptable safety profile in a particular indication, or that such product candidate’s clinical and other benefits outweigh its safety risks;
• our failure of clinical trials to meet the level of statistical significance required for approval;
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We face competition from generics that could enter the market after expiry of our composition of matter patent.
−Removed: The China Health Authority has accepted abbreviated new drug applications (“NDAs”) for over 20 generic roxadustat applicants and approved eight for marketing in China.
+Added: The China Health Authority has accepted abbreviated new drug applications (“NDAs”) for over 20 generic roxadustat applicants and approved multiple for marketing in China.
In addition, we will likely face competition from other companies developing products in the same diseases or indications in which we are developing or commercializing products.
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Intellectual property protecting our roxadustat product is either being challenged or will expire at various times in the coming years, raising the possibility of generic competition.
−Removed: The China Health Authority has approved eight generic forms of our EVRENZO TM product (爱瑞卓 ® , roxadustat) for marketing in China.
+Added: The China Health Authority has approved multiple generic forms of our EVRENZO TM product (爱瑞卓 ® , roxadustat) for marketing in China.
The introduction of generic competition for a patented branded medicine typically results in a significant and rapid reduction in net sales and operating income for the branded product because generic manufacturers typically offer their unpatented versions at sharply lower prices.
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Although our agreements require employees to acknowledge ownership by us of inventions conceived as a result of employment from the point of conception and, to the extent necessary, perfect such ownership by assignment, and we require employees, consultants, advisors and third parties who have access to our trade secrets, proprietary know-how and other confidential information and technology to enter into appropriate confidentiality agreements, we cannot be certain that our trade secrets, proprietary know-how and other confidential information and technology will not be subject to unauthorized disclosure, use, or misappropriation or that our competitors will not otherwise gain access to or independently develop substantially equivalent trade secrets, proprietary know-how and other information and technology.
−Removed: Furthermore, the laws of some foreign countries, in particular China, where we have operations, pending the sale of FibroGen International (Hong Kong) Ltd.
−Removed: to AstraZeneca Treasury Limited, do not protect proprietary rights to the same extent or in the same manner as the laws of the U.S.
+Added: Furthermore, the laws of some foreign countries, in particular China, where we have operations, pending the sale of FibroGen International to AstraZeneca Treasury Limited, do not protect proprietary rights to the same extent or in the same manner as the laws of the U.S.
As a result, we may encounter significant problems in protecting and defending our intellectual property globally.
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3470397 (the “`397 Patent”), which claims formulations comprising the commercial crystalline form of roxadustat was upheld in opposition, the opponents have appealed the decision in this case.
−Removed: Our European Patent No.
−Removed: 3003284 (the “`284 Patent”), which claims photostable formulations of roxadustat, was recently revoked on appeal by the opponents, with no further right to appeal available to us.
In China, three roxadustat crystal form patents were revoked in first-round proceedings and the revocations were upheld on first appeal;
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13,709/2018), and China’s Personal Information Protection Law (“PIPL”) impose strict requirements for processing personal data, including health-related information.
−Removed: For example, under the EU GDPR, companies may face fines of up to 20 million Euros or 4% of annual global revenue, whichever is greater;
+Added: Specifically, under the EU GDPR, companies may face fines of up to 20 million Euros or 4% of annual global revenue, whichever is greater;
or private litigation related to processing of personal data brought by classes of data subjects or consumer protection organizations authorized at law to represent their interests.
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bans on processing personal data;
+Added: restrictions on use of AI tools which may involve personal data;
and orders to destroy or not use personal data.
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As a public company, we are required to comply with the Sarbanes-Oxley Act and other rules that govern public companies.
−Removed: If we experience material weaknesses or otherwise fail to maintain an effective system of internal control over financial reporting, the accuracy and timing of our financial reporting and subsequently our liquidity and our access to capital markets may be adversely affected, we may be unable to maintain or regain compliance with applicable securities laws and the Nasdaq Stock Market LLC listing requirements, we may be subject to regulatory investigations and penalties, investors may lose confidence in our financial reporting, and our stock price may decline.
+Added: If we experience material weaknesses or otherwise fail to maintain an effective system of internal control over financial reporting, the accuracy and timing of our financial reporting and subsequently our liquidity and our access to capital markets may be adversely affected, we may be unable to maintain compliance with applicable securities laws and the Nasdaq Stock Market LLC listing requirements, we may be subject to regulatory investigations and penalties, investors may lose confidence in our financial reporting, and our stock price may decline.
In addition, if our internal control over financial reporting is deemed ineffective, efforts required to remediate an ineffective system of control over financial reporting may place a significant burden on management and add increased pressure on our financial resources and processes.
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in the future may include changes to Prescription Drug User Fee Act (PDUFA) funding, or other actions that impact FDA programs or personnel funded by user fees.
−Removed: If user fees are cut or eliminated, or if personnel funded by user fees are terminated at FDA, the result could increase uncertainty on review timelines or extend FDA review timelines (e.g., NDAs, Biologics License Applications), which can result in delays for regulatory action and adversely impact drug development timelines.
+Added: If user fees are cut or eliminated, or if personnel funded by user fees are terminated at FDA, the result could increase uncertainty on review timelines or extend FDA review timelines (e.g., new drug applications, Biologics License Applications), which can result in delays for regulatory action and adversely impact drug development timelines.
Further, in the U.S.
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Risks Related to Our International Operations
−Removed: If we are unable to consummate the sale of FibroGen International to AstraZeneca Treasury Limited, the trading price of our common stock and our business may be harmed.*
−Removed: The consummation of the sale of FibroGen International is subject to the satisfaction or waiver of various customary closing conditions, including the receipt of regulatory approval from the China State Administration for Market Regulation.
+Added: If we are unable to consummate the sale of FibroGen International to AstraZeneca Treasury Limited, our operations, business conditions, and the trading price of our common stock and our business may be harmed.*
+Added: The consummation of the sale of FibroGen International is subject to the satisfaction or waiver of various customary closing conditions, including the receipt of regulatory approval from the China State Administration for Market Regulation (“SAMR”).
We cannot guarantee that the closing conditions set forth in the Share Purchase Agreement will be satisfied and if we are unable to satisfy the closing conditions, AstraZeneca Treasury Limited will not be obligated to purchase FibroGen International.
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for twelve months from the date of this Quarterly Report and will not be able to comply with our debt covenant under our senior secured term loan facilities that requires a minimum of $18.75 million of unrestricted cash and cash equivalents to be held in accounts in the U.S.
−Removed: In addition, if the sale of FibroGen International to AstraZeneca Treasury Limited is not completed, our Board of Directors, may evaluate other strategic alternatives with respect to FibroGen International, if any are available, which alternatives may not be as favorable to our stockholders as the proposed sale to AstraZeneca Treasury Limited, and may not result in any definitive transaction or enhance stockholder value.
+Added: If the sale is not completed within eight months of entering into the Share Purchase Agreement, both parties have a right to terminate the transaction.
+Added: If the sale of FibroGen International is delayed past the third quarter of 2025, we may need to delay initiation of our planned Phase 2 monotherapy dose optimization study of FG-3246 for the treatment of mCRPC, currently expected in the third quarter of 2025.
+Added: If the sale of FibroGen International to AstraZeneca Treasury Limited is not completed, our Board of Directors, may evaluate other strategic alternatives with respect to FibroGen International, if any are available, which alternatives may not be as favorable to our stockholders as the proposed sale to AstraZeneca Treasury Limited, and may not result in any definitive transaction or enhance stockholder value.
We have established operations in China and there are a number of risks associated with international operations could materially and adversely affect our business.
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Such reimbursement pricing for China is effective for a standard two-year period (between January 1, 2024, and December 31, 2025).
−Removed: The China Health Authority has since accepted abbreviated NDAs for over 20 generics roxadustat applicants and approved eight for marketing in China.
−Removed: Given that the requisite number (four or more) generics have been approved in China, there is a substantial risk of roxadustat being subject to the country’s volume-based purchasing (“VBP”) program whereby a national tender could be called.
+Added: The China Health Authority has since accepted abbreviated NDAs for over 20 generics roxadustat applicants and approved multiple for marketing in China.
+Added: In the third quarter, roxadustat was announced as being included in the 11 th round of the country’s volume-based purchasing program whereby a national tender has been called.
We expect this to occur in the second half of 2025.
−Removed: If a tender is called for roxadustat, our access to the China market as the originator drug would be significantly impacted and our price would be further reduced, resulting in significant reductions in the topline revenue for roxadustat.
+Added: As a result, we expect our access to the China market as the originator drug will be significantly impacted and our price would be further reduced, resulting in significant reductions in the topline revenue for roxadustat.
Sales of roxadustat in China may also be limited due to the complex nature of the healthcare system, low average personal income, pricing controls, still developing infrastructure, and potentially rapid competition from other products.
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In addition, if FibroGen Beijing incurs debt on its own behalf in the future, the agreements governing such debt may restrict its ability to pay dividends or make other distributions to us.
−Removed: As of March 31, 2025, approximately $72.6 million of our cash and cash equivalents is held in China, and was included in the held for sale assets in the condensed consolidated balance sheet, the entirety of which we will have access to upon the close of the sale of FibroGen International to AstraZeneca Treasury Limited.
+Added: As of June 30, 2025, approximately $96.5 million of our cash and cash equivalents is held in China, and was included in the held for sale assets on the condensed consolidated balance sheet, the entirety of which we will have access to upon the close of the sale of FibroGen International to AstraZeneca Treasury Limited.
Any capital contributions from us to FibroGen Beijing must be approved by the Ministry of Commerce in China, and failure to obtain such approval may materially and adversely affect the liquidity position of FibroGen Beijing.
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We are incorporated in the state of Delaware.
−Removed: To operate our general business activities currently conducted in China, each of our Chinese subsidiaries (and our joint venture with AstraZeneca, Falikang) is required to and does obtain a business license from the local counterpart of the State Administration for Market Regulation.
+Added: To operate our general business activities currently conducted in China, each of our Chinese subsidiaries (and our joint venture with AstraZeneca, Falikang) is required to and does obtain a business license from the local counterpart of the SAMR.
Such business licenses list the business activities we are authorized to carry out and we would be noncompliant if we act outside of the scope of business activities set forth under the relevant business license.
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Our net loss for the years ended December 31, 2024 and 2023 were $47.6 million and $284.2 million, respectively.
−Removed: As of March 31, 2025, we had an accumulated deficit of $1.9 billion.
−Removed: As of March 31, 2025, we had capital resources from cash and cash equivalents of $33.6 million for our continuing operations.
−Removed: In addition, as of March 31, 2025, we had $72.6 million of cash and cash equivalents and $22.0 million of accounts receivable in China, which were included in the held for sale assets in the condensed consolidated balance sheet.
+Added: As of June 30, 2025, we had an accumulated deficit of $1.9 billion.
+Added: As of June 30, 2025, we had capital resources from cash and cash equivalents of $23.4 million for our continuing operations.
+Added: In addition, as of June 30, 2025, we had $96.5 million of cash and cash equivalents and $22.1 million of accounts receivable in China, which were included in the held for sale assets on the condensed consolidated balance sheet.
We will have access to the entirety of the cash, cash equivalents, and accounts receivable balances in China upon the close of the sales of FibroGen International to AstraZeneca Treasury Limited.
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If we are unable to continue to attract and retain personnel with the quality and experience necessary to advance the development of our product candidates, our ability to pursue our strategy will be limited and our business and operations would be adversely affected.
−Removed: Recruiting and retaining qualified commercial, development, scientific, clinical, and manufacturing personnel are and will continue to be critical to our success.
−Removed: Furthermore, replacing executive officers and key employees may be difficult and may take an extended period of time because of the limited number of individuals in our industry with the breadth of skills and experience required to successfully develop, gain regulatory approval of and commercialize product candidates.
+Added: Retaining and recruiting qualified commercial, development, scientific, clinical, and manufacturing personnel are and will continue to be critical to our success.
+Added: Furthermore, replacing executive officers and key employees may be difficult and may take an extended period of time.
We may be unable to hire, train, retain or motivate these key personnel on acceptable terms given the intense competition among numerous biopharmaceutical companies for similar personnel.
−Removed: There is also significant competition, in particular in the San Francisco Bay Area, for the hiring of experienced and qualified personnel, which increases the importance of retention of our existing personnel.
We are exposed to the risks associated with litigation, investigations, regulatory proceedings, and other legal matters, any of which could have a material adverse effect on us.*
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Our third party service providers may be exposed to natural disasters and other catastrophes.*
−Removed: Our third party service providers, who we rely on for critical support functions, may be exposed to significant risks from natural disasters and other catastrophic events, including earthquakes, power outages, and unforeseen disruptions.
+Added: Our third party service, cloud and software-as-a-services (SaaS) platform providers, who we rely on for critical support functions, may be exposed to significant risks from natural disasters and other catastrophic events, including earthquakes, power outages, and unforeseen disruptions.
Many of these providers are in regions prone to earthquakes and fires, such as the San Francisco Bay Area.
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The market price of our common stock has at times experienced price volatility and may continue to be volatile.
−Removed: For example, during the 12-month period ended March 31, 2025, the closing price of our common stock on the Nasdaq Global Select Market has ranged from $0.30 per share to $2.36 per share.
+Added: For example, during the 12-month period ended June 30, 2025, the closing price of our common stock on the Nasdaq Global Select Market has ranged from $5.16 per share to $31.50 per share.
In general, pharmaceutical, biotechnology and other life sciences company stocks have been highly volatile in the current market.
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• changes in legislation or other regulatory developments affecting our product candidates or our industry;
−Removed: • the potential effect of a reverse stock split;
• fluctuations in the valuation of the biotechnology industry and particular companies perceived by investors to be comparable to us;
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For a description of our pending litigation and SEC investigation, see Note 10, Commitments and Contingencies , to the condensed consolidated financial statements.
−Removed: There is a risk that our common stock would be delisted due to not meeting the Nasdaq price requirement.*
−Removed: As previously disclosed, on September 12, 2024, FibroGen received a letter from the Nasdaq Listing Qualifications Staff of the Nasdaq Stock Market notifying FibroGen that for 30 consecutive business days the bid price of FibroGen’s common stock had closed below $1.00 per share, the minimum closing bid price required by the continued listing requirements of Nasdaq listing rule 5450(a)(1) (the “Rule”).
−Removed: Therefore, in accordance with the Nasdaq listing rules, FibroGen was provided 180 calendar days, or until March 11, 2025 to regain compliance with the minimum bid price rule.
−Removed: On March 12, 2025, FibroGen received written notice from Nasdaq notifying FibroGen that it did not regain compliance with the Rule and, unless the Company requested an appeal of this determination, is subject to delisting from the Nasdaq Global Select Market at the opening of business on March 21, 2025.
−Removed: On March 14, 2025, FibroGen appealed this determination and therefore such delisting has been stayed.
−Removed: On April 11, 2025, the Nasdaq Hearings Panel granted FibroGen a temporary exception to regain compliance with the Rule, contingent on obtaining stockholder approval on June 4, 2025, and thereafter effecting a reverse stock split by June 24, 2025.
−Removed: Our common stock will remain listed on the Nasdaq pending the reverse stock split.
−Removed: We believe we will be successful in our appeal at the Nasdaq Hearings Panel and therefore be eligible for an additional 180-day period to regain compliance with the minimum bid price.
−Removed: We also believe we will be able to regain compliance with the Rule and cure the minimum bid price deficiency, including by effecting a reverse stock split, if necessary.
−Removed: However, there can be no assurance that our appeal to the Hearings Panel will be successful or that we will regain compliance with the minimum bid price rule or maintain compliance with the other listing requirements within the above timelines, or if it is necessary for us to effect a reverse stock split in order for us to regain compliance with the minimum bid price rule we may fail to do so, in which case our common stock may be delisted.
−Removed: Delisting from the Nasdaq Global Select Market or any Nasdaq market could make trading our common stock more difficult for investors, potentially leading to declines in our share price and liquidity.
−Removed: In addition, without a Nasdaq market listing, stockholders may have a difficult time getting a quote for the sale or purchase of our common stock, the sale or purchase of our common stock would likely be made more difficult and the trading volume and liquidity of our common stock could decline.
−Removed: Delisting from Nasdaq could also result in negative publicity and could also make it more difficult for us to raise additional capital.
−Removed: The absence of such a listing may adversely affect the value accorded by other parties.
−Removed: Further, if we are delisted, we would also incur additional costs under state blue sky laws in connection with any sales of our securities.
−Removed: These requirements could severely limit the market liquidity of our common stock and the ability of our stockholders to sell our common stock in the secondary market.
−Removed: If our common stock is delisted by Nasdaq, our common stock may be eligible to trade on an over-the-counter quotation system, such as the OTCQB market, where an investor may find it more difficult to sell our common stock or obtain accurate quotations as to the market value of our common stock.
−Removed: We cannot assure you that our common stock, if delisted from Nasdaq, will be listed on another national securities exchange or quoted on an over-the counter quotation system.
−Removed: If our common stock is delisted, it may come within the definition of “penny stock” as defined in the Exchange Act, and would be covered by Rule 15g-9 of the Exchange Act.
−Removed: That rule imposes additional sales practice requirements on broker-dealers who sell securities to persons other than established customers and accredited investors.
−Removed: For transactions covered by Rule 15g-9, the broker-dealer must make a special suitability determination for the purchaser and receive the purchaser’s written agreement to the transaction prior to the sale.
−Removed: Consequently, Rule 15g-9, if it were to become applicable, would affect the ability or willingness of broker-dealers to sell our securities, and accordingly would affect the ability of stockholders to sell their securities in the public market.
−Removed: These additional procedures could also limit our ability to raise additional capital in the future.
We are a smaller reporting company, and the reduced disclosure requirements applicable to us may make our common stock less attractive to investors.
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Changes in tax regulations could have an adverse effect on our results of operations and financial condition.
+Added: On July 4, 2025, the One Big Beautiful Bill Act was signed into law in the U.S.
+Added: which contains a broad range of tax reform provisions affecting businesses.
+Added: We are still in the process of evaluating the legislation and an estimate of the financial impact cannot be made at this time.
Federal and state tax laws impose substantial restrictions on the utilization of net operating loss and credit carryforwards in the event of an “ownership change” for tax purposes, as defined in IRC Section 382.
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Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.