BVF II GP LLC

Row 1 · 2024-11-08 · Other · Disposed 3,062,000 · Balance 830,237

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On November 8, 2024, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 5,775,000 shares of common stock of the Issuer for a total of 5,775,000 Pre-Funded Warrants (the "Pre-Funded Warrants"). Pursuant to the Exchange Agreement, BVF exchanged 3,062,000 shares for 3,062,000 Pre-Funded Warrants, BVF2 exchanged 2,378,000 shares for 2,378,000 Pre-Funded Warrants and Trading Fund OS exchanged 240,000 shares for 240,000 Pre-Funded Warrants.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2024-11-08 · Other · Disposed 2,378,000 · Balance 662,970

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On November 8, 2024, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 5,775,000 shares of common stock of the Issuer for a total of 5,775,000 Pre-Funded Warrants (the "Pre-Funded Warrants"). Pursuant to the Exchange Agreement, BVF exchanged 3,062,000 shares for 3,062,000 Pre-Funded Warrants, BVF2 exchanged 2,378,000 shares for 2,378,000 Pre-Funded Warrants and Trading Fund OS exchanged 240,000 shares for 240,000 Pre-Funded Warrants.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2024-11-08 · Other · Disposed 240,000 · Balance 87,911

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On November 8, 2024, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 5,775,000 shares of common stock of the Issuer for a total of 5,775,000 Pre-Funded Warrants (the "Pre-Funded Warrants"). Pursuant to the Exchange Agreement, BVF exchanged 3,062,000 shares for 3,062,000 Pre-Funded Warrants, BVF2 exchanged 2,378,000 shares for 2,378,000 Pre-Funded Warrants and Trading Fund OS exchanged 240,000 shares for 240,000 Pre-Funded Warrants.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 4 · 2024-11-08 · Other · Acquired 3,062,000 · Balance 3,062,000

F2: On November 8, 2024, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 5,775,000 shares of common stock of the Issuer for a total of 5,775,000 Pre-Funded Warrants (the "Pre-Funded Warrants"). Pursuant to the Exchange Agreement, BVF exchanged 3,062,000 shares for 3,062,000 Pre-Funded Warrants, BVF2 exchanged 2,378,000 shares for 2,378,000 Pre-Funded Warrants and Trading Fund OS exchanged 240,000 shares for 240,000 Pre-Funded Warrants.

F6: Each Pre-Funded Warrant may be exercised for one share of common stock. The Pre-Funded Warrants are exercisable at any time and do not expire. A holder of Pre-Funded Warrants may not exercise such Pre-Funded Warrants if, after giving effect or immediately prior to to such exercise, such holder, its Attribution Parties (as defined in the Warrant To Purchase Shares of Common Stock) and any other persons whose beneficial ownership of shares of common stock would be aggregated with such holder's for purposes of Section 13(d) of the Exchange Act, would beneficially own (i) in excess of 9.99% of the total number of issued and outstanding shares of common stock, or (ii) securities representing voting power in excess of 9.99% of the combined voting power of all of the securities of the Issuer then outstanding, in each case, following such exercise.

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 5 · 2024-11-08 · Other · Acquired 2,378,000 · Balance 2,378,000

F2: On November 8, 2024, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 5,775,000 shares of common stock of the Issuer for a total of 5,775,000 Pre-Funded Warrants (the "Pre-Funded Warrants"). Pursuant to the Exchange Agreement, BVF exchanged 3,062,000 shares for 3,062,000 Pre-Funded Warrants, BVF2 exchanged 2,378,000 shares for 2,378,000 Pre-Funded Warrants and Trading Fund OS exchanged 240,000 shares for 240,000 Pre-Funded Warrants.

F6: Each Pre-Funded Warrant may be exercised for one share of common stock. The Pre-Funded Warrants are exercisable at any time and do not expire. A holder of Pre-Funded Warrants may not exercise such Pre-Funded Warrants if, after giving effect or immediately prior to to such exercise, such holder, its Attribution Parties (as defined in the Warrant To Purchase Shares of Common Stock) and any other persons whose beneficial ownership of shares of common stock would be aggregated with such holder's for purposes of Section 13(d) of the Exchange Act, would beneficially own (i) in excess of 9.99% of the total number of issued and outstanding shares of common stock, or (ii) securities representing voting power in excess of 9.99% of the combined voting power of all of the securities of the Issuer then outstanding, in each case, following such exercise.

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 6 · 2024-11-08 · Other · Acquired 240,000 · Balance 240,000

F2: On November 8, 2024, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 5,775,000 shares of common stock of the Issuer for a total of 5,775,000 Pre-Funded Warrants (the "Pre-Funded Warrants"). Pursuant to the Exchange Agreement, BVF exchanged 3,062,000 shares for 3,062,000 Pre-Funded Warrants, BVF2 exchanged 2,378,000 shares for 2,378,000 Pre-Funded Warrants and Trading Fund OS exchanged 240,000 shares for 240,000 Pre-Funded Warrants.

F6: Each Pre-Funded Warrant may be exercised for one share of common stock. The Pre-Funded Warrants are exercisable at any time and do not expire. A holder of Pre-Funded Warrants may not exercise such Pre-Funded Warrants if, after giving effect or immediately prior to to such exercise, such holder, its Attribution Parties (as defined in the Warrant To Purchase Shares of Common Stock) and any other persons whose beneficial ownership of shares of common stock would be aggregated with such holder's for purposes of Section 13(d) of the Exchange Act, would beneficially own (i) in excess of 9.99% of the total number of issued and outstanding shares of common stock, or (ii) securities representing voting power in excess of 9.99% of the combined voting power of all of the securities of the Issuer then outstanding, in each case, following such exercise.

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2025-05-15 · Disposition to issuer · Disposed 8,679,726 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Represents securities disposed of pursuant to the terms of that certain Agreement and Plan of Merger, dated April 1, 2025, by and among the Issuer, Concentra Biosciences, LLC and Concentra Merger Sub III, Inc. in exchange for $0.33 in cash per share of Common Stock.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2025-05-15 · Disposition to issuer · Disposed 6,777,935 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Represents securities disposed of pursuant to the terms of that certain Agreement and Plan of Merger, dated April 1, 2025, by and among the Issuer, Concentra Biosciences, LLC and Concentra Merger Sub III, Inc. in exchange for $0.33 in cash per share of Common Stock.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2025-05-15 · Disposition to issuer · Disposed 855,211 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Represents securities disposed of pursuant to the terms of that certain Agreement and Plan of Merger, dated April 1, 2025, by and among the Issuer, Concentra Biosciences, LLC and Concentra Merger Sub III, Inc. in exchange for $0.33 in cash per share of Common Stock.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2025-06-13 · Other · Acquired 657,308 · Balance 707,116

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F5: On June 13, 2025, the Issuer completed a reverse merger transaction (the "Merger") with Crescent Biopharma, Inc. pursuant to that certain Agreement and Plan of Merger and Reorganization, dated October 28, 2024, as amended by Amendment No. 1 to the Agreement and Plan of Merger and Reorganization, dated February 14, 2025. In connection with the Merger, the Reporting Persons acquired an aggregate of 1,292,422 shares of Common Stock and 597,928 pre-funded warrants to purchase shares of Common Stock (the "Pre-Funded Warrants"), in exchange for all of the former Crescent Biopharma, Inc. capital stock owned by the Reporting Persons.

F7: Represents the number of securities owned following the Issuer's 1-for-100 Reverse Stock Split effected immediately prior to the Merger.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2025-06-13 · Other · Acquired 556,617 · Balance 593,740

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F5: On June 13, 2025, the Issuer completed a reverse merger transaction (the "Merger") with Crescent Biopharma, Inc. pursuant to that certain Agreement and Plan of Merger and Reorganization, dated October 28, 2024, as amended by Amendment No. 1 to the Agreement and Plan of Merger and Reorganization, dated February 14, 2025. In connection with the Merger, the Reporting Persons acquired an aggregate of 1,292,422 shares of Common Stock and 597,928 pre-funded warrants to purchase shares of Common Stock (the "Pre-Funded Warrants"), in exchange for all of the former Crescent Biopharma, Inc. capital stock owned by the Reporting Persons.

F7: Represents the number of securities owned following the Issuer's 1-for-100 Reverse Stock Split effected immediately prior to the Merger.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2025-06-13 · Other · Acquired 56,079 · Balance 62,383

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F5: On June 13, 2025, the Issuer completed a reverse merger transaction (the "Merger") with Crescent Biopharma, Inc. pursuant to that certain Agreement and Plan of Merger and Reorganization, dated October 28, 2024, as amended by Amendment No. 1 to the Agreement and Plan of Merger and Reorganization, dated February 14, 2025. In connection with the Merger, the Reporting Persons acquired an aggregate of 1,292,422 shares of Common Stock and 597,928 pre-funded warrants to purchase shares of Common Stock (the "Pre-Funded Warrants"), in exchange for all of the former Crescent Biopharma, Inc. capital stock owned by the Reporting Persons.

F7: Represents the number of securities owned following the Issuer's 1-for-100 Reverse Stock Split effected immediately prior to the Merger.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 4 · 2025-06-13 · Other · Acquired 304,098 · Balance 304,098

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F6: Each Pre-Funded Warrant may be exercised for one share of Common Stock. The Pre-Funded Warrants are exercisable immediately after the issue date and may be exercised at any time until all of the Pre-Funded Warrants are exercised in full. A holder of Pre-Funded Warrants (together with its attribution parties) may not exercise any portion of a Pre-Funded Warrant to the extent that immediately prior to or after giving effect to such exercise, the holder (together with its attribution parties) would own more than 9.99% of the shares of Common Stock outstanding immediately after such exercise. The exercise price of the Pre-Funded Warrants is equal to $0.001 divided by 0.1445.

F5: On June 13, 2025, the Issuer completed a reverse merger transaction (the "Merger") with Crescent Biopharma, Inc. pursuant to that certain Agreement and Plan of Merger and Reorganization, dated October 28, 2024, as amended by Amendment No. 1 to the Agreement and Plan of Merger and Reorganization, dated February 14, 2025. In connection with the Merger, the Reporting Persons acquired an aggregate of 1,292,422 shares of Common Stock and 597,928 pre-funded warrants to purchase shares of Common Stock (the "Pre-Funded Warrants"), in exchange for all of the former Crescent Biopharma, Inc. capital stock owned by the Reporting Persons.

F7: Represents the number of securities owned following the Issuer's 1-for-100 Reverse Stock Split effected immediately prior to the Merger.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 5 · 2025-06-13 · Other · Acquired 257,515 · Balance 257,515

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F6: Each Pre-Funded Warrant may be exercised for one share of Common Stock. The Pre-Funded Warrants are exercisable immediately after the issue date and may be exercised at any time until all of the Pre-Funded Warrants are exercised in full. A holder of Pre-Funded Warrants (together with its attribution parties) may not exercise any portion of a Pre-Funded Warrant to the extent that immediately prior to or after giving effect to such exercise, the holder (together with its attribution parties) would own more than 9.99% of the shares of Common Stock outstanding immediately after such exercise. The exercise price of the Pre-Funded Warrants is equal to $0.001 divided by 0.1445.

F5: On June 13, 2025, the Issuer completed a reverse merger transaction (the "Merger") with Crescent Biopharma, Inc. pursuant to that certain Agreement and Plan of Merger and Reorganization, dated October 28, 2024, as amended by Amendment No. 1 to the Agreement and Plan of Merger and Reorganization, dated February 14, 2025. In connection with the Merger, the Reporting Persons acquired an aggregate of 1,292,422 shares of Common Stock and 597,928 pre-funded warrants to purchase shares of Common Stock (the "Pre-Funded Warrants"), in exchange for all of the former Crescent Biopharma, Inc. capital stock owned by the Reporting Persons.

F7: Represents the number of securities owned following the Issuer's 1-for-100 Reverse Stock Split effected immediately prior to the Merger.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 6 · 2025-06-13 · Other · Acquired 25,944 · Balance 25,944

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F6: Each Pre-Funded Warrant may be exercised for one share of Common Stock. The Pre-Funded Warrants are exercisable immediately after the issue date and may be exercised at any time until all of the Pre-Funded Warrants are exercised in full. A holder of Pre-Funded Warrants (together with its attribution parties) may not exercise any portion of a Pre-Funded Warrant to the extent that immediately prior to or after giving effect to such exercise, the holder (together with its attribution parties) would own more than 9.99% of the shares of Common Stock outstanding immediately after such exercise. The exercise price of the Pre-Funded Warrants is equal to $0.001 divided by 0.1445.

F5: On June 13, 2025, the Issuer completed a reverse merger transaction (the "Merger") with Crescent Biopharma, Inc. pursuant to that certain Agreement and Plan of Merger and Reorganization, dated October 28, 2024, as amended by Amendment No. 1 to the Agreement and Plan of Merger and Reorganization, dated February 14, 2025. In connection with the Merger, the Reporting Persons acquired an aggregate of 1,292,422 shares of Common Stock and 597,928 pre-funded warrants to purchase shares of Common Stock (the "Pre-Funded Warrants"), in exchange for all of the former Crescent Biopharma, Inc. capital stock owned by the Reporting Persons.

F7: Represents the number of securities owned following the Issuer's 1-for-100 Reverse Stock Split effected immediately prior to the Merger.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2023-06-26 · Other · Disposed 3,989,130 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: Securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of May 10, 2023, by and among the Issuer, Swedish Orphan Biovitrum AB (PUBL) ("Parent"), and Cleopatra Acquisition Corp., an indirect wholly owned subsidiary of Parent ("Purchaser"), pursuant to which Purchaser completed a tender offer for the shares of Common Stock and thereafter merged with and into the Issuer (the "Merger") effective as of June 26, 2023 (the "Effective Time"). At the Effective Time, each issued and outstanding share of Common Stock was cancelled and converted into the right to receive $9.10 in cash (the "Offer Price") without interest and subject to applicable withholding taxes.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2023-06-26 · Other · Disposed 2,595,239 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: Securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of May 10, 2023, by and among the Issuer, Swedish Orphan Biovitrum AB (PUBL) ("Parent"), and Cleopatra Acquisition Corp., an indirect wholly owned subsidiary of Parent ("Purchaser"), pursuant to which Purchaser completed a tender offer for the shares of Common Stock and thereafter merged with and into the Issuer (the "Merger") effective as of June 26, 2023 (the "Effective Time"). At the Effective Time, each issued and outstanding share of Common Stock was cancelled and converted into the right to receive $9.10 in cash (the "Offer Price") without interest and subject to applicable withholding taxes.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2023-06-26 · Other · Disposed 702,505 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: Securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of May 10, 2023, by and among the Issuer, Swedish Orphan Biovitrum AB (PUBL) ("Parent"), and Cleopatra Acquisition Corp., an indirect wholly owned subsidiary of Parent ("Purchaser"), pursuant to which Purchaser completed a tender offer for the shares of Common Stock and thereafter merged with and into the Issuer (the "Merger") effective as of June 26, 2023 (the "Effective Time"). At the Effective Time, each issued and outstanding share of Common Stock was cancelled and converted into the right to receive $9.10 in cash (the "Offer Price") without interest and subject to applicable withholding taxes.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 4 · 2023-06-26 · Other · Disposed 1,526,147 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: Securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of May 10, 2023, by and among the Issuer, Swedish Orphan Biovitrum AB (PUBL) ("Parent"), and Cleopatra Acquisition Corp., an indirect wholly owned subsidiary of Parent ("Purchaser"), pursuant to which Purchaser completed a tender offer for the shares of Common Stock and thereafter merged with and into the Issuer (the "Merger") effective as of June 26, 2023 (the "Effective Time"). At the Effective Time, each issued and outstanding share of Common Stock was cancelled and converted into the right to receive $9.10 in cash (the "Offer Price") without interest and subject to applicable withholding taxes.

F5: Securities held in certain Partners managed accounts (the "Partners Managed Accounts"). Partners, as the investment manager of the Partners Managed Accounts, may be deemed to beneficially own the securities held by the Partners Managed Accounts. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities held by the Partners Managed Accounts. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities held by the Partners Managed Accounts.

Row 5 · 2023-06-26 · Other · Disposed 43,139 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: Securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of May 10, 2023, by and among the Issuer, Swedish Orphan Biovitrum AB (PUBL) ("Parent"), and Cleopatra Acquisition Corp., an indirect wholly owned subsidiary of Parent ("Purchaser"), pursuant to which Purchaser completed a tender offer for the shares of Common Stock and thereafter merged with and into the Issuer (the "Merger") effective as of June 26, 2023 (the "Effective Time"). At the Effective Time, each issued and outstanding share of Common Stock was cancelled and converted into the right to receive $9.10 in cash (the "Offer Price") without interest and subject to applicable withholding taxes.

F6: Partners, BVF Inc. and Mr. Lampert may be deemed to have a pecuniary interest in these securities of the Issuer previously held by Matthew Perry, who served as a director of the Issuer and is a member of Partners, due to a certain agreement between Partners and Mr. Perry, pursuant to which Mr. Perry is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of options awarded to Mr. Perry in his capacity as a director to Partners. As such, Mr. Perry disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

Row 6 · 2023-06-26 · Other · Disposed 1,594 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: Pursuant to the Merger Agreement, each share of the Issuer's preferred stock that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive $91,000 per share, without interest and subject to any applicable withholding taxes.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 7 · 2023-06-26 · Other · Disposed 1,250 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: Pursuant to the Merger Agreement, each share of the Issuer's preferred stock that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive $91,000 per share, without interest and subject to any applicable withholding taxes.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 8 · 2023-06-26 · Other · Disposed 191 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: Pursuant to the Merger Agreement, each share of the Issuer's preferred stock that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive $91,000 per share, without interest and subject to any applicable withholding taxes.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 9 · 2023-06-26 · Other · Disposed 12 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: Pursuant to the Merger Agreement, each share of the Issuer's preferred stock that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive $91,000 per share, without interest and subject to any applicable withholding taxes.

F5: Securities held in certain Partners managed accounts (the "Partners Managed Accounts"). Partners, as the investment manager of the Partners Managed Accounts, may be deemed to beneficially own the securities held by the Partners Managed Accounts. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities held by the Partners Managed Accounts. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities held by the Partners Managed Accounts.

Row 10 · 2023-06-26 · Other · Disposed 344 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: Pursuant to the Merger Agreement, each share of the Issuer's preferred stock that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive $91,000 per share, without interest and subject to any applicable withholding taxes.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 11 · 2023-06-26 · Other · Disposed 239 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: Pursuant to the Merger Agreement, each share of the Issuer's preferred stock that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive $91,000 per share, without interest and subject to any applicable withholding taxes.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 12 · 2023-06-26 · Other · Disposed 17 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons was a member of a Section 13(d) group that previously collectively owned more than 10% of the Issuer's outstanding shares of Common Stock, par value $0.001 (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: Pursuant to the Merger Agreement, each share of the Issuer's preferred stock that was issued and outstanding immediately prior to the Effective Time was converted into the right to receive $91,000 per share, without interest and subject to any applicable withholding taxes.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 13 · 2023-06-26 · Disposition to issuer · Disposed 120,000 · Balance 0

F6: Partners, BVF Inc. and Mr. Lampert may be deemed to have a pecuniary interest in these securities of the Issuer previously held by Matthew Perry, who served as a director of the Issuer and is a member of Partners, due to a certain agreement between Partners and Mr. Perry, pursuant to which Mr. Perry is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of options awarded to Mr. Perry in his capacity as a director to Partners. As such, Mr. Perry disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

F9: Pursuant to the Merger Agreement, each option to purchase shares of Common Stock that was outstanding immediately prior to the Effective Time, whether or not vested, with an exercise price that was less than the Offer Price, terminated and was cancelled immediately prior to the Effective Time and converted into the right to receive a cash payment (without interest, and less any applicable withholding taxes) equal to (A) the excess of (x) the Offer Price over (y) the exercise price payable per share of Common Stock under such option, multiplied by (B) the total number of shares of Common Stock subject to such option.

Row 14 · 2023-06-26 · Disposition to issuer · Disposed 60,000 · Balance 0

F6: Partners, BVF Inc. and Mr. Lampert may be deemed to have a pecuniary interest in these securities of the Issuer previously held by Matthew Perry, who served as a director of the Issuer and is a member of Partners, due to a certain agreement between Partners and Mr. Perry, pursuant to which Mr. Perry is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of options awarded to Mr. Perry in his capacity as a director to Partners. As such, Mr. Perry disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

F9: Pursuant to the Merger Agreement, each option to purchase shares of Common Stock that was outstanding immediately prior to the Effective Time, whether or not vested, with an exercise price that was less than the Offer Price, terminated and was cancelled immediately prior to the Effective Time and converted into the right to receive a cash payment (without interest, and less any applicable withholding taxes) equal to (A) the excess of (x) the Offer Price over (y) the exercise price payable per share of Common Stock under such option, multiplied by (B) the total number of shares of Common Stock subject to such option.

Row 15 · 2023-06-26 · Disposition to issuer · Disposed 50,000 · Balance 0

F6: Partners, BVF Inc. and Mr. Lampert may be deemed to have a pecuniary interest in these securities of the Issuer previously held by Matthew Perry, who served as a director of the Issuer and is a member of Partners, due to a certain agreement between Partners and Mr. Perry, pursuant to which Mr. Perry is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of options awarded to Mr. Perry in his capacity as a director to Partners. As such, Mr. Perry disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

F9: Pursuant to the Merger Agreement, each option to purchase shares of Common Stock that was outstanding immediately prior to the Effective Time, whether or not vested, with an exercise price that was less than the Offer Price, terminated and was cancelled immediately prior to the Effective Time and converted into the right to receive a cash payment (without interest, and less any applicable withholding taxes) equal to (A) the excess of (x) the Offer Price over (y) the exercise price payable per share of Common Stock under such option, multiplied by (B) the total number of shares of Common Stock subject to such option.

Row 16 · 2023-06-26 · Disposition to issuer · Disposed 80,000 · Balance 0

F6: Partners, BVF Inc. and Mr. Lampert may be deemed to have a pecuniary interest in these securities of the Issuer previously held by Matthew Perry, who served as a director of the Issuer and is a member of Partners, due to a certain agreement between Partners and Mr. Perry, pursuant to which Mr. Perry is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of options awarded to Mr. Perry in his capacity as a director to Partners. As such, Mr. Perry disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

F9: Pursuant to the Merger Agreement, each option to purchase shares of Common Stock that was outstanding immediately prior to the Effective Time, whether or not vested, with an exercise price that was less than the Offer Price, terminated and was cancelled immediately prior to the Effective Time and converted into the right to receive a cash payment (without interest, and less any applicable withholding taxes) equal to (A) the excess of (x) the Offer Price over (y) the exercise price payable per share of Common Stock under such option, multiplied by (B) the total number of shares of Common Stock subject to such option.

Row 17 · 2023-06-26 · Disposition to issuer · Disposed 80,000 · Balance 0

F6: Partners, BVF Inc. and Mr. Lampert may be deemed to have a pecuniary interest in these securities of the Issuer previously held by Matthew Perry, who served as a director of the Issuer and is a member of Partners, due to a certain agreement between Partners and Mr. Perry, pursuant to which Mr. Perry is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of options awarded to Mr. Perry in his capacity as a director to Partners. As such, Mr. Perry disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

F9: Pursuant to the Merger Agreement, each option to purchase shares of Common Stock that was outstanding immediately prior to the Effective Time, whether or not vested, with an exercise price that was less than the Offer Price, terminated and was cancelled immediately prior to the Effective Time and converted into the right to receive a cash payment (without interest, and less any applicable withholding taxes) equal to (A) the excess of (x) the Offer Price over (y) the exercise price payable per share of Common Stock under such option, multiplied by (B) the total number of shares of Common Stock subject to such option.

Row 18 · 2023-06-26 · Disposition to issuer · Disposed 80,000 · Balance 0

F6: Partners, BVF Inc. and Mr. Lampert may be deemed to have a pecuniary interest in these securities of the Issuer previously held by Matthew Perry, who served as a director of the Issuer and is a member of Partners, due to a certain agreement between Partners and Mr. Perry, pursuant to which Mr. Perry is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of options awarded to Mr. Perry in his capacity as a director to Partners. As such, Mr. Perry disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

F9: Pursuant to the Merger Agreement, each option to purchase shares of Common Stock that was outstanding immediately prior to the Effective Time, whether or not vested, with an exercise price that was less than the Offer Price, terminated and was cancelled immediately prior to the Effective Time and converted into the right to receive a cash payment (without interest, and less any applicable withholding taxes) equal to (A) the excess of (x) the Offer Price over (y) the exercise price payable per share of Common Stock under such option, multiplied by (B) the total number of shares of Common Stock subject to such option.

Row 1 · 2020-12-09 · Sale · Disposed 239,274 · Balance 3,811,271

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2020-12-09 · Sale · Disposed 166,194 · Balance 2,760,185

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2020-12-09 · Sale · Disposed 25,486 · Balance 463,244

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2023-01-19 · Other · Disposed 3,500,000 · Balance 558,854

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F5: Pursuant to a letter agreement with the Issuer, BVF, BVF2 and Trading Fund OS agreed to exchange an aggregate of 6,400,000 shares of Common Stock for a total of 640,000 shares of newly issued Series A Convertible Preferred Stock (the "Series A Preferred Stock") as set forth herein.

F6: The Series A Preferred Stock is convertible at any time at the option of the holder into a number of shares of Common Stock equal to the Conversion Ratio equal to a Stated Value of $109.20 per share divided by a Conversion Price of $10.92, or 10 shares of Common Stock for each share of Series A Preferred Stock, subject to adjustment as provided in the Certificate of Designations for the Series A Preferred Stock (the "COD"). Under the COD, the Series A Preferred Stock may not be converted if, after such conversion, the Reporting Persons would beneficially own, as determined in accordance with Section 13(d) of the Exchange Act, more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock pursuant to such conversion. The Series A Preferred Stock has no expiration date.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2023-01-19 · Other · Disposed 2,600,000 · Balance 392,808

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F5: Pursuant to a letter agreement with the Issuer, BVF, BVF2 and Trading Fund OS agreed to exchange an aggregate of 6,400,000 shares of Common Stock for a total of 640,000 shares of newly issued Series A Convertible Preferred Stock (the "Series A Preferred Stock") as set forth herein.

F6: The Series A Preferred Stock is convertible at any time at the option of the holder into a number of shares of Common Stock equal to the Conversion Ratio equal to a Stated Value of $109.20 per share divided by a Conversion Price of $10.92, or 10 shares of Common Stock for each share of Series A Preferred Stock, subject to adjustment as provided in the Certificate of Designations for the Series A Preferred Stock (the "COD"). Under the COD, the Series A Preferred Stock may not be converted if, after such conversion, the Reporting Persons would beneficially own, as determined in accordance with Section 13(d) of the Exchange Act, more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock pursuant to such conversion. The Series A Preferred Stock has no expiration date.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2023-01-19 · Other · Disposed 300,000 · Balance 64,161

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F5: Pursuant to a letter agreement with the Issuer, BVF, BVF2 and Trading Fund OS agreed to exchange an aggregate of 6,400,000 shares of Common Stock for a total of 640,000 shares of newly issued Series A Convertible Preferred Stock (the "Series A Preferred Stock") as set forth herein.

F6: The Series A Preferred Stock is convertible at any time at the option of the holder into a number of shares of Common Stock equal to the Conversion Ratio equal to a Stated Value of $109.20 per share divided by a Conversion Price of $10.92, or 10 shares of Common Stock for each share of Series A Preferred Stock, subject to adjustment as provided in the Certificate of Designations for the Series A Preferred Stock (the "COD"). Under the COD, the Series A Preferred Stock may not be converted if, after such conversion, the Reporting Persons would beneficially own, as determined in accordance with Section 13(d) of the Exchange Act, more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock pursuant to such conversion. The Series A Preferred Stock has no expiration date.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 4 · 2023-01-19 · Other · Acquired 350,000 · Balance 350,000

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F6: The Series A Preferred Stock is convertible at any time at the option of the holder into a number of shares of Common Stock equal to the Conversion Ratio equal to a Stated Value of $109.20 per share divided by a Conversion Price of $10.92, or 10 shares of Common Stock for each share of Series A Preferred Stock, subject to adjustment as provided in the Certificate of Designations for the Series A Preferred Stock (the "COD"). Under the COD, the Series A Preferred Stock may not be converted if, after such conversion, the Reporting Persons would beneficially own, as determined in accordance with Section 13(d) of the Exchange Act, more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock pursuant to such conversion. The Series A Preferred Stock has no expiration date.

F5: Pursuant to a letter agreement with the Issuer, BVF, BVF2 and Trading Fund OS agreed to exchange an aggregate of 6,400,000 shares of Common Stock for a total of 640,000 shares of newly issued Series A Convertible Preferred Stock (the "Series A Preferred Stock") as set forth herein.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 5 · 2023-01-19 · Other · Acquired 260,000 · Balance 260,000

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F6: The Series A Preferred Stock is convertible at any time at the option of the holder into a number of shares of Common Stock equal to the Conversion Ratio equal to a Stated Value of $109.20 per share divided by a Conversion Price of $10.92, or 10 shares of Common Stock for each share of Series A Preferred Stock, subject to adjustment as provided in the Certificate of Designations for the Series A Preferred Stock (the "COD"). Under the COD, the Series A Preferred Stock may not be converted if, after such conversion, the Reporting Persons would beneficially own, as determined in accordance with Section 13(d) of the Exchange Act, more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock pursuant to such conversion. The Series A Preferred Stock has no expiration date.

F5: Pursuant to a letter agreement with the Issuer, BVF, BVF2 and Trading Fund OS agreed to exchange an aggregate of 6,400,000 shares of Common Stock for a total of 640,000 shares of newly issued Series A Convertible Preferred Stock (the "Series A Preferred Stock") as set forth herein.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 6 · 2023-01-19 · Other · Acquired 30,000 · Balance 30,000

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F6: The Series A Preferred Stock is convertible at any time at the option of the holder into a number of shares of Common Stock equal to the Conversion Ratio equal to a Stated Value of $109.20 per share divided by a Conversion Price of $10.92, or 10 shares of Common Stock for each share of Series A Preferred Stock, subject to adjustment as provided in the Certificate of Designations for the Series A Preferred Stock (the "COD"). Under the COD, the Series A Preferred Stock may not be converted if, after such conversion, the Reporting Persons would beneficially own, as determined in accordance with Section 13(d) of the Exchange Act, more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock pursuant to such conversion. The Series A Preferred Stock has no expiration date.

F5: Pursuant to a letter agreement with the Issuer, BVF, BVF2 and Trading Fund OS agreed to exchange an aggregate of 6,400,000 shares of Common Stock for a total of 640,000 shares of newly issued Series A Convertible Preferred Stock (the "Series A Preferred Stock") as set forth herein.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · Balance 2,945,743

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · Balance 2,164,406

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · Balance 358,450

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2025-10-09 · Other · Disposed 6,194,145 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an arrangement under Section 288 of the Business Corporations Act (British Columbia) involving the Issuer, XenoTherapeutics, Inc. (the "Parent"), Xeno Acquisition Corp. (the "Purchaser"), a wholly-owned subsidiary of Parent, and XOMA Royalty Corporation pursuant to a business combination agreement dated July 13, 2025, and the plan of arrangement, pursuant to which, among other things, the Purchaser acquired all of the outstanding shares of common stock of the Issuer, effective October 9, 2025 (the "Merger").

F6: The Reporting Persons received the following in exchange for each share of the Issuer's common stock disposed of in connection with the Merger: $0.124231 in cash per share of common stock (excluding the approximately $1.69 of cash per share of common stock previously distributed to the Issuer's shareholders) and one contingent value right per share of common stock for potential cash payments of up to approximately $0.14 per share of common stock.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2025-10-09 · Other · Disposed 4,726,743 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an arrangement under Section 288 of the Business Corporations Act (British Columbia) involving the Issuer, XenoTherapeutics, Inc. (the "Parent"), Xeno Acquisition Corp. (the "Purchaser"), a wholly-owned subsidiary of Parent, and XOMA Royalty Corporation pursuant to a business combination agreement dated July 13, 2025, and the plan of arrangement, pursuant to which, among other things, the Purchaser acquired all of the outstanding shares of common stock of the Issuer, effective October 9, 2025 (the "Merger").

F6: The Reporting Persons received the following in exchange for each share of the Issuer's common stock disposed of in connection with the Merger: $0.124231 in cash per share of common stock (excluding the approximately $1.69 of cash per share of common stock previously distributed to the Issuer's shareholders) and one contingent value right per share of common stock for potential cash payments of up to approximately $0.14 per share of common stock.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2025-10-09 · Other · Disposed 560,797 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an arrangement under Section 288 of the Business Corporations Act (British Columbia) involving the Issuer, XenoTherapeutics, Inc. (the "Parent"), Xeno Acquisition Corp. (the "Purchaser"), a wholly-owned subsidiary of Parent, and XOMA Royalty Corporation pursuant to a business combination agreement dated July 13, 2025, and the plan of arrangement, pursuant to which, among other things, the Purchaser acquired all of the outstanding shares of common stock of the Issuer, effective October 9, 2025 (the "Merger").

F6: The Reporting Persons received the following in exchange for each share of the Issuer's common stock disposed of in connection with the Merger: $0.124231 in cash per share of common stock (excluding the approximately $1.69 of cash per share of common stock previously distributed to the Issuer's shareholders) and one contingent value right per share of common stock for potential cash payments of up to approximately $0.14 per share of common stock.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2021-02-02 · Sale · Disposed 25,234 · Balance 1,642,186

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2021-02-02 · Sale · Disposed 16,850 · Balance 1,188,131

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2021-02-02 · Sale · Disposed 4,325 · Balance 233,150

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · Balance 4,448,421

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the Offering (as defined in Remarks), for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · Balance 3,279,831

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the Offering (as defined in Remarks), for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · Balance 534,847

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the Offering (as defined in Remarks), for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2021-10-07 · Sale · Disposed 530,999 · Balance 2,165,675

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the Issuer's outstanding shares of Common Shares, (euro)0.09 nominal value per share of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2021-10-08 · Sale · Disposed 80,011 · Balance 2,085,664

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the Issuer's outstanding shares of Common Shares, (euro)0.09 nominal value per share of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 3 · 2021-10-07 · Sale · Disposed 384,914 · Balance 1,578,732

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the Issuer's outstanding shares of Common Shares, (euro)0.09 nominal value per share of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 4 · 2021-10-08 · Sale · Disposed 58,327 · Balance 1,520,405

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the Issuer's outstanding shares of Common Shares, (euro)0.09 nominal value per share of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 5 · 2021-10-07 · Sale · Disposed 69,534 · Balance 241,676

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the Issuer's outstanding shares of Common Shares, (euro)0.09 nominal value per share of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 6 · 2021-10-08 · Sale · Disposed 8,929 · Balance 232,747

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the Issuer's outstanding shares of Common Shares, (euro)0.09 nominal value per share of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2024-12-13 · Other · Acquired 234,323 · Balance 371,916

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On December 13, 2024, Palvella Therapeutics, Inc., formerly known as Pieris Pharmaceuticals, Inc. (the "Issuer"), completed a reverse merger transaction (the "Merger") with Palvella Therapeutics, Inc. ("Former Palvella") pursuant to that certain Agreement and Plan of Merger, dated as of July 23, 2024 (the "Merger Agreement"). In connection with the Merger, the Reporting Persons acquired an aggregate of 438,929 shares of Common Stock in exchange for all of the Former Palvella capital stock owned of record by the Reporting Persons.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2024-12-13 · Other · Acquired 174,958 · Balance 282,223

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On December 13, 2024, Palvella Therapeutics, Inc., formerly known as Pieris Pharmaceuticals, Inc. (the "Issuer"), completed a reverse merger transaction (the "Merger") with Palvella Therapeutics, Inc. ("Former Palvella") pursuant to that certain Agreement and Plan of Merger, dated as of July 23, 2024 (the "Merger Agreement"). In connection with the Merger, the Reporting Persons acquired an aggregate of 438,929 shares of Common Stock in exchange for all of the Former Palvella capital stock owned of record by the Reporting Persons.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2024-12-13 · Other · Acquired 29,648 · Balance 38,961

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On December 13, 2024, Palvella Therapeutics, Inc., formerly known as Pieris Pharmaceuticals, Inc. (the "Issuer"), completed a reverse merger transaction (the "Merger") with Palvella Therapeutics, Inc. ("Former Palvella") pursuant to that certain Agreement and Plan of Merger, dated as of July 23, 2024 (the "Merger Agreement"). In connection with the Merger, the Reporting Persons acquired an aggregate of 438,929 shares of Common Stock in exchange for all of the Former Palvella capital stock owned of record by the Reporting Persons.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 4 · Balance 85

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F6: The Reporting Persons hold an aggregate of 85 shares of Series A Convertible Preferred Stock (the "Series A Preferred Stock"), which are convertible into an aggregate of 1,133 shares of Common Stock. Each share of Series A Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series A Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own a number of shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series A Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 5 · Balance 2,083

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: The Reporting Persons hold an aggregate of 4,026 shares of Series B Convertible Preferred Stock (the "Series B Preferred Stock"), which are convertible into an aggregate of 53,706 shares of Common Stock. Each share of Series B Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series B Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series B Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 6 · Balance 1,659

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: The Reporting Persons hold an aggregate of 4,026 shares of Series B Convertible Preferred Stock (the "Series B Preferred Stock"), which are convertible into an aggregate of 53,706 shares of Common Stock. Each share of Series B Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series B Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series B Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 7 · Balance 284

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: The Reporting Persons hold an aggregate of 4,026 shares of Series B Convertible Preferred Stock (the "Series B Preferred Stock"), which are convertible into an aggregate of 53,706 shares of Common Stock. Each share of Series B Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series B Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series B Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 8 · Balance 1,796

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: The Reporting Persons hold an aggregate of 3,506 shares of Series C Convertible Preferred Stock (the "Series C Preferred Stock"), which are convertible into an aggregate of 46,770 shares of Common Stock. Each share of Series C Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series C Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series C Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 9 · Balance 1,445

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: The Reporting Persons hold an aggregate of 3,506 shares of Series C Convertible Preferred Stock (the "Series C Preferred Stock"), which are convertible into an aggregate of 46,770 shares of Common Stock. Each share of Series C Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series C Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series C Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 10 · Balance 265

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F8: The Reporting Persons hold an aggregate of 3,506 shares of Series C Convertible Preferred Stock (the "Series C Preferred Stock"), which are convertible into an aggregate of 46,770 shares of Common Stock. Each share of Series C Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series C Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series C Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 11 · Balance 1,759

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F9: The Reporting Persons hold an aggregate of 3,000 shares of Series D Convertible Preferred Stock (the "Series D Preferred Stock"), which are convertible into an aggregate of 40,020 shares of Common Stock. Each share of Series D Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series D Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series D Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 12 · Balance 1,078

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F9: The Reporting Persons hold an aggregate of 3,000 shares of Series D Convertible Preferred Stock (the "Series D Preferred Stock"), which are convertible into an aggregate of 40,020 shares of Common Stock. Each share of Series D Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series D Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series D Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 13 · Balance 163

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F9: The Reporting Persons hold an aggregate of 3,000 shares of Series D Convertible Preferred Stock (the "Series D Preferred Stock"), which are convertible into an aggregate of 40,020 shares of Common Stock. Each share of Series D Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series D Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series D Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 14 · Balance 2,670

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F10: The Reporting Persons hold an aggregate of 4,698 shares of Series E Convertible Preferred Stock (the "Series E Preferred Stock"), which are convertible into an aggregate of 62,671 shares of Common Stock. Each share of Series E Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series E Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series E Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 15 · Balance 1,867

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F10: The Reporting Persons hold an aggregate of 4,698 shares of Series E Convertible Preferred Stock (the "Series E Preferred Stock"), which are convertible into an aggregate of 62,671 shares of Common Stock. Each share of Series E Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series E Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series E Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 16 · Balance 161

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that previously collectively beneficially owned over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F10: The Reporting Persons hold an aggregate of 4,698 shares of Series E Convertible Preferred Stock (the "Series E Preferred Stock"), which are convertible into an aggregate of 62,671 shares of Common Stock. Each share of Series E Preferred Stock is convertible at any time, at the holder's option, into 13.34 shares of Common Stock, except that the Series E Preferred Stock may not be converted if, after such conversion, the holder thereof (together with such holder's affiliates, and any other person whose beneficial ownership of Common Stock would be aggregated with the holder's ownership for purposes of Section 13(d) of the Exchange Act and the applicable regulations of the SEC, including any "group" of which the holder is a member) would beneficially own shares of Common Stock in excess of 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of the Common Stock. The Series E Preferred Stock has no expiration date.

F11: Reflects an eighty-for-one reverse stock split of the Issuer's issued and outstanding Common Stock, effective as of April 18, 2024.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2023-12-18 · Sale · Disposed 8,974,245 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons").

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2023-12-18 · Sale · Disposed 7,290,667 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons").

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2023-12-18 · Sale · Disposed 896,366 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons").

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2024-01-25 · Other · Disposed 1,734,960 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons").

F2: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of December 13, 2023, by and among the Issuer, Pathos AI, Inc., a Delaware corporation ("Parent"), and WK Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), pursuant to which Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share"). After completion of the tender offer, Merger Sub merged with and into the Issuer (the "Merger"), effective as of January 26, 2024 (the "Effective Time"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent.

F6: The Reporting Persons received the following in exchange for each Share tendered in connection with the Merger: $1.16 in cash per Share and one contingent value right for potential cash payments of up to approximately $0.17 per Share.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 3 · 2024-01-25 · Other · Disposed 1,367,838 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons").

F2: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of December 13, 2023, by and among the Issuer, Pathos AI, Inc., a Delaware corporation ("Parent"), and WK Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), pursuant to which Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share"). After completion of the tender offer, Merger Sub merged with and into the Issuer (the "Merger"), effective as of January 26, 2024 (the "Effective Time"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent.

F6: The Reporting Persons received the following in exchange for each Share tendered in connection with the Merger: $1.16 in cash per Share and one contingent value right for potential cash payments of up to approximately $0.17 per Share.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 5 · 2024-01-25 · Other · Disposed 185,388 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons").

F2: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of December 13, 2023, by and among the Issuer, Pathos AI, Inc., a Delaware corporation ("Parent"), and WK Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), pursuant to which Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share"). After completion of the tender offer, Merger Sub merged with and into the Issuer (the "Merger"), effective as of January 26, 2024 (the "Effective Time"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent.

F6: The Reporting Persons received the following in exchange for each Share tendered in connection with the Merger: $1.16 in cash per Share and one contingent value right for potential cash payments of up to approximately $0.17 per Share.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 2 · 2024-01-25 · Other · Disposed 2,870,985 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons").

F2: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of December 13, 2023, by and among the Issuer, Pathos AI, Inc., a Delaware corporation ("Parent"), and WK Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), pursuant to which Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share"). After completion of the tender offer, Merger Sub merged with and into the Issuer (the "Merger"), effective as of January 26, 2024 (the "Effective Time"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent.

F6: The Reporting Persons received the following in exchange for each Share tendered in connection with the Merger: $1.16 in cash per Share and one contingent value right for potential cash payments of up to approximately $0.17 per Share.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 4 · 2024-01-25 · Other · Disposed 2,076,085 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons").

F2: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of December 13, 2023, by and among the Issuer, Pathos AI, Inc., a Delaware corporation ("Parent"), and WK Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), pursuant to which Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share"). After completion of the tender offer, Merger Sub merged with and into the Issuer (the "Merger"), effective as of January 26, 2024 (the "Effective Time"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent.

F6: The Reporting Persons received the following in exchange for each Share tendered in connection with the Merger: $1.16 in cash per Share and one contingent value right for potential cash payments of up to approximately $0.17 per Share.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 6 · 2024-01-25 · Other · Disposed 341,547 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons").

F2: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of December 13, 2023, by and among the Issuer, Pathos AI, Inc., a Delaware corporation ("Parent"), and WK Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), pursuant to which Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share"). After completion of the tender offer, Merger Sub merged with and into the Issuer (the "Merger"), effective as of January 26, 2024 (the "Effective Time"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent.

F6: The Reporting Persons received the following in exchange for each Share tendered in connection with the Merger: $1.16 in cash per Share and one contingent value right for potential cash payments of up to approximately $0.17 per Share.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 7 · 2024-01-26 · Disposition to issuer · Disposed 35,000 · Balance 0

F2: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of December 13, 2023, by and among the Issuer, Pathos AI, Inc., a Delaware corporation ("Parent"), and WK Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), pursuant to which Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share"). After completion of the tender offer, Merger Sub merged with and into the Issuer (the "Merger"), effective as of January 26, 2024 (the "Effective Time"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent.

F8: Pursuant to the terms of the Merger Agreement, at the Effective Time, each option to purchase Shares granted under the Issuer's Amended and Restated 2018 Stock Option/Stock Issuance Plan or the Issuer's 2021 Equity Incentive Plan, pursuant to any inducement award or otherwise that was outstanding immediately prior to the Effective Time was cancelled for no consideration.

F7: Partners, BVF Inc. and Mr. Lampert may have been deemed to have a pecuniary interest in these options due to a certain agreement between Partners and Gorjan Hrustanovic, who served on the Issuer's board of directors and as a member of Partners, pursuant to which Mr. Hrustanovic was obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of these options to Partners. As such, Mr. Hrustanovic disclaims beneficial ownership of these securities.

Row 8 · 2024-01-26 · Disposition to issuer · Disposed 20,000 · Balance 0

F2: This Form 4 reports securities disposed of pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of December 13, 2023, by and among the Issuer, Pathos AI, Inc., a Delaware corporation ("Parent"), and WK Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), pursuant to which Merger Sub completed a tender offer for shares of common stock of the Issuer (each, a "Share"). After completion of the tender offer, Merger Sub merged with and into the Issuer (the "Merger"), effective as of January 26, 2024 (the "Effective Time"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent.

F8: Pursuant to the terms of the Merger Agreement, at the Effective Time, each option to purchase Shares granted under the Issuer's Amended and Restated 2018 Stock Option/Stock Issuance Plan or the Issuer's 2021 Equity Incentive Plan, pursuant to any inducement award or otherwise that was outstanding immediately prior to the Effective Time was cancelled for no consideration.

F7: Partners, BVF Inc. and Mr. Lampert may have been deemed to have a pecuniary interest in these options due to a certain agreement between Partners and Gorjan Hrustanovic, who served on the Issuer's board of directors and as a member of Partners, pursuant to which Mr. Hrustanovic was obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of these options to Partners. As such, Mr. Hrustanovic disclaims beneficial ownership of these securities.

Row 1 · 2026-01-28 · Other · Disposed 5,309,432 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an Arrangement Agreement, dated as of November 14, 2025, under the Business Corporations Act (Quebec), by and among the Issuer, XenoTherapeutics, Inc. ("Parent"), Xeno Acquisition Corp. ("Purchaser"), a wholly-owned subsidiary of Parent, and solely for limited purposes, XOMA Royalty Corporation, pursuant to to which Purchaser acquired all of the issued and outstanding Common Shares of the Issuer, effective January 28, 2026 (the "Merger").

F6: The Reporting Persons received the following in exchange for each Common Share of the Issuer disposed of in connection with the Merger: $2.20 in cash per Common Share and one contingent value right per Common Share for potential cash payments.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2026-01-28 · Other · Disposed 4,308,573 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an Arrangement Agreement, dated as of November 14, 2025, under the Business Corporations Act (Quebec), by and among the Issuer, XenoTherapeutics, Inc. ("Parent"), Xeno Acquisition Corp. ("Purchaser"), a wholly-owned subsidiary of Parent, and solely for limited purposes, XOMA Royalty Corporation, pursuant to to which Purchaser acquired all of the issued and outstanding Common Shares of the Issuer, effective January 28, 2026 (the "Merger").

F6: The Reporting Persons received the following in exchange for each Common Share of the Issuer disposed of in connection with the Merger: $2.20 in cash per Common Share and one contingent value right per Common Share for potential cash payments.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2026-01-28 · Other · Disposed 548,938 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an Arrangement Agreement, dated as of November 14, 2025, under the Business Corporations Act (Quebec), by and among the Issuer, XenoTherapeutics, Inc. ("Parent"), Xeno Acquisition Corp. ("Purchaser"), a wholly-owned subsidiary of Parent, and solely for limited purposes, XOMA Royalty Corporation, pursuant to to which Purchaser acquired all of the issued and outstanding Common Shares of the Issuer, effective January 28, 2026 (the "Merger").

F6: The Reporting Persons received the following in exchange for each Common Share of the Issuer disposed of in connection with the Merger: $2.20 in cash per Common Share and one contingent value right per Common Share for potential cash payments.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2023-05-10 · Other · Disposed 4,018,253 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On May 10, 2023, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 7,410,518 Ordinary Shares of the Issuer for a total of 7,410,518 newly designated Non-Voting Ordinary Shares of the Issuer (the "Non-Voting Ordinary Shares"). Pursuant to the Exchange Agreement, BVF exchanged 4,018,253 Ordinary Shares for 4,018,253 Non-Voting Ordinary Shares, BVF2 exchanged 2,929,660 Ordinary Shares for 2,929,660 Non-Voting Ordinary Shares and Trading Fund OS exchanged 462,605 Ordinary Shares for 462,605 Non-Voting Ordinary Shares.

F3: Each holder of Non-Voting Ordinary Shares has the right to convert each Non-Voting Ordinary Share held by such holder into one Ordinary Share at such holder's election; provided, however, that such Non-Voting Ordinary Shares may only be converted into Ordinary Shares during such time or times such conversion would not result in the holder(s) thereof beneficially owning (for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")), when aggregated with affiliates with whom such holder is required to aggregate beneficial ownership for purposes of Section 13(d) of the Exchange Act, in excess of 9.99% of the Ordinary Shares (the "Beneficial Ownership Limitation"). The Non-Voting Ordinary Shares have no expiration date.

F4: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2023-05-10 · Other · Disposed 2,929,660 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On May 10, 2023, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 7,410,518 Ordinary Shares of the Issuer for a total of 7,410,518 newly designated Non-Voting Ordinary Shares of the Issuer (the "Non-Voting Ordinary Shares"). Pursuant to the Exchange Agreement, BVF exchanged 4,018,253 Ordinary Shares for 4,018,253 Non-Voting Ordinary Shares, BVF2 exchanged 2,929,660 Ordinary Shares for 2,929,660 Non-Voting Ordinary Shares and Trading Fund OS exchanged 462,605 Ordinary Shares for 462,605 Non-Voting Ordinary Shares.

F3: Each holder of Non-Voting Ordinary Shares has the right to convert each Non-Voting Ordinary Share held by such holder into one Ordinary Share at such holder's election; provided, however, that such Non-Voting Ordinary Shares may only be converted into Ordinary Shares during such time or times such conversion would not result in the holder(s) thereof beneficially owning (for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")), when aggregated with affiliates with whom such holder is required to aggregate beneficial ownership for purposes of Section 13(d) of the Exchange Act, in excess of 9.99% of the Ordinary Shares (the "Beneficial Ownership Limitation"). The Non-Voting Ordinary Shares have no expiration date.

F5: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2023-05-10 · Other · Disposed 462,605 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On May 10, 2023, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 7,410,518 Ordinary Shares of the Issuer for a total of 7,410,518 newly designated Non-Voting Ordinary Shares of the Issuer (the "Non-Voting Ordinary Shares"). Pursuant to the Exchange Agreement, BVF exchanged 4,018,253 Ordinary Shares for 4,018,253 Non-Voting Ordinary Shares, BVF2 exchanged 2,929,660 Ordinary Shares for 2,929,660 Non-Voting Ordinary Shares and Trading Fund OS exchanged 462,605 Ordinary Shares for 462,605 Non-Voting Ordinary Shares.

F3: Each holder of Non-Voting Ordinary Shares has the right to convert each Non-Voting Ordinary Share held by such holder into one Ordinary Share at such holder's election; provided, however, that such Non-Voting Ordinary Shares may only be converted into Ordinary Shares during such time or times such conversion would not result in the holder(s) thereof beneficially owning (for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")), when aggregated with affiliates with whom such holder is required to aggregate beneficial ownership for purposes of Section 13(d) of the Exchange Act, in excess of 9.99% of the Ordinary Shares (the "Beneficial Ownership Limitation"). The Non-Voting Ordinary Shares have no expiration date.

F6: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 4 · Balance 2,801,529

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: Represents Ordinary Shares of the Issuer underlying American Depositary Shares ("ADS") of the Issuer directly owned by the Reporting Persons. Each ADS represents three Ordinary Shares.

F4: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 5 · Balance 2,130,657

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: Represents Ordinary Shares of the Issuer underlying American Depositary Shares ("ADS") of the Issuer directly owned by the Reporting Persons. Each ADS represents three Ordinary Shares.

F5: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 6 · Balance 241,755

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F7: Represents Ordinary Shares of the Issuer underlying American Depositary Shares ("ADS") of the Issuer directly owned by the Reporting Persons. Each ADS represents three Ordinary Shares.

F6: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 7 · 2023-05-10 · Other · Acquired 4,018,253 · Balance 4,018,253

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On May 10, 2023, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 7,410,518 Ordinary Shares of the Issuer for a total of 7,410,518 newly designated Non-Voting Ordinary Shares of the Issuer (the "Non-Voting Ordinary Shares"). Pursuant to the Exchange Agreement, BVF exchanged 4,018,253 Ordinary Shares for 4,018,253 Non-Voting Ordinary Shares, BVF2 exchanged 2,929,660 Ordinary Shares for 2,929,660 Non-Voting Ordinary Shares and Trading Fund OS exchanged 462,605 Ordinary Shares for 462,605 Non-Voting Ordinary Shares.

F3: Each holder of Non-Voting Ordinary Shares has the right to convert each Non-Voting Ordinary Share held by such holder into one Ordinary Share at such holder's election; provided, however, that such Non-Voting Ordinary Shares may only be converted into Ordinary Shares during such time or times such conversion would not result in the holder(s) thereof beneficially owning (for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")), when aggregated with affiliates with whom such holder is required to aggregate beneficial ownership for purposes of Section 13(d) of the Exchange Act, in excess of 9.99% of the Ordinary Shares (the "Beneficial Ownership Limitation"). The Non-Voting Ordinary Shares have no expiration date.

F8: Represents Non-Voting Ordinary Shares of the Issuer. Each Non-Voting Ordinary Share is convertible into one Ordinary Share, subject to the Beneficial Ownership Limitation.

F4: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 8 · 2023-05-10 · Other · Acquired 2,929,660 · Balance 2,929,660

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On May 10, 2023, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 7,410,518 Ordinary Shares of the Issuer for a total of 7,410,518 newly designated Non-Voting Ordinary Shares of the Issuer (the "Non-Voting Ordinary Shares"). Pursuant to the Exchange Agreement, BVF exchanged 4,018,253 Ordinary Shares for 4,018,253 Non-Voting Ordinary Shares, BVF2 exchanged 2,929,660 Ordinary Shares for 2,929,660 Non-Voting Ordinary Shares and Trading Fund OS exchanged 462,605 Ordinary Shares for 462,605 Non-Voting Ordinary Shares.

F3: Each holder of Non-Voting Ordinary Shares has the right to convert each Non-Voting Ordinary Share held by such holder into one Ordinary Share at such holder's election; provided, however, that such Non-Voting Ordinary Shares may only be converted into Ordinary Shares during such time or times such conversion would not result in the holder(s) thereof beneficially owning (for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")), when aggregated with affiliates with whom such holder is required to aggregate beneficial ownership for purposes of Section 13(d) of the Exchange Act, in excess of 9.99% of the Ordinary Shares (the "Beneficial Ownership Limitation"). The Non-Voting Ordinary Shares have no expiration date.

F8: Represents Non-Voting Ordinary Shares of the Issuer. Each Non-Voting Ordinary Share is convertible into one Ordinary Share, subject to the Beneficial Ownership Limitation.

F5: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 9 · 2023-05-10 · Other · Acquired 462,605 · Balance 462,605

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that previously beneficially owned over 10% of the Issuer's outstanding shares. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: On May 10, 2023, certain of the Reporting Persons entered into an Exchange Agreement with the Issuer (the "Exchange Agreement"), pursuant to which such Reporting Persons agreed to exchange an aggregate of 7,410,518 Ordinary Shares of the Issuer for a total of 7,410,518 newly designated Non-Voting Ordinary Shares of the Issuer (the "Non-Voting Ordinary Shares"). Pursuant to the Exchange Agreement, BVF exchanged 4,018,253 Ordinary Shares for 4,018,253 Non-Voting Ordinary Shares, BVF2 exchanged 2,929,660 Ordinary Shares for 2,929,660 Non-Voting Ordinary Shares and Trading Fund OS exchanged 462,605 Ordinary Shares for 462,605 Non-Voting Ordinary Shares.

F3: Each holder of Non-Voting Ordinary Shares has the right to convert each Non-Voting Ordinary Share held by such holder into one Ordinary Share at such holder's election; provided, however, that such Non-Voting Ordinary Shares may only be converted into Ordinary Shares during such time or times such conversion would not result in the holder(s) thereof beneficially owning (for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")), when aggregated with affiliates with whom such holder is required to aggregate beneficial ownership for purposes of Section 13(d) of the Exchange Act, in excess of 9.99% of the Ordinary Shares (the "Beneficial Ownership Limitation"). The Non-Voting Ordinary Shares have no expiration date.

F8: Represents Non-Voting Ordinary Shares of the Issuer. Each Non-Voting Ordinary Share is convertible into one Ordinary Share, subject to the Beneficial Ownership Limitation.

F6: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2024-10-29 · Sale · Disposed 538,420 · Balance 1,794,218

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially the own securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2024-10-29 · Sale · Disposed 396,963 · Balance 1,367,257

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F3: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2024-10-29 · Sale · Disposed 64,617 · Balance 176,692

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Following the transactions reported herein, for the purposes of Section 16, the Reporting Persons ceased to beneficially own 10% or more of the outstanding shares of Common Stock of the Issuer. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F4: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 1 · 2026-07-14 · Other · Disposed 3,635,758 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that collectively owns more than 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an Agreement and Plan of Merger, dated April 27, 2026, as amended by Amendment No. 1 to the Agreement and Plan of Merger on May 16, 2026 (as amended, the "Merger Agreement"), by and among the Issuer, Ligand Pharmaceuticals Incorporated ("Parent"), Flex Merger Sub, Inc., a wholly owned subsidiary of Parent ("Merger Sub"), and XOMA Royalty Holdings Corporation ("HoldCo"), pursuant to which, among other things, the Parent acquired all of the outstanding shares of the common stock of the Issuer, effective July 14, 2026 (the "Merger").

F7: The Reporting Persons received the following in exchange for each share of the Issuer's common stock disposed of in connection with the Merger: $39.00 in cash per share of common stock and an amount of contingent value rights per share of common stock for potential cash payments.

F3: Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Row 2 · 2026-07-14 · Other · Disposed 2,773,545 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that collectively owns more than 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an Agreement and Plan of Merger, dated April 27, 2026, as amended by Amendment No. 1 to the Agreement and Plan of Merger on May 16, 2026 (as amended, the "Merger Agreement"), by and among the Issuer, Ligand Pharmaceuticals Incorporated ("Parent"), Flex Merger Sub, Inc., a wholly owned subsidiary of Parent ("Merger Sub"), and XOMA Royalty Holdings Corporation ("HoldCo"), pursuant to which, among other things, the Parent acquired all of the outstanding shares of the common stock of the Issuer, effective July 14, 2026 (the "Merger").

F7: The Reporting Persons received the following in exchange for each share of the Issuer's common stock disposed of in connection with the Merger: $39.00 in cash per share of common stock and an amount of contingent value rights per share of common stock for potential cash payments.

F4: Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Row 3 · 2026-07-14 · Other · Disposed 412,000 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that collectively owns more than 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an Agreement and Plan of Merger, dated April 27, 2026, as amended by Amendment No. 1 to the Agreement and Plan of Merger on May 16, 2026 (as amended, the "Merger Agreement"), by and among the Issuer, Ligand Pharmaceuticals Incorporated ("Parent"), Flex Merger Sub, Inc., a wholly owned subsidiary of Parent ("Merger Sub"), and XOMA Royalty Holdings Corporation ("HoldCo"), pursuant to which, among other things, the Parent acquired all of the outstanding shares of the common stock of the Issuer, effective July 14, 2026 (the "Merger").

F7: The Reporting Persons received the following in exchange for each share of the Issuer's common stock disposed of in connection with the Merger: $39.00 in cash per share of common stock and an amount of contingent value rights per share of common stock for potential cash payments.

F5: Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Row 4 · 2026-07-14 · Other · Disposed 772,000 · Balance 0

F1: This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that collectively owns more than 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

F2: This Form 4 reports securities disposed of pursuant to an Agreement and Plan of Merger, dated April 27, 2026, as amended by Amendment No. 1 to the Agreement and Plan of Merger on May 16, 2026 (as amended, the "Merger Agreement"), by and among the Issuer, Ligand Pharmaceuticals Incorporated ("Parent"), Flex Merger Sub, Inc., a wholly owned subsidiary of Parent ("Merger Sub"), and XOMA Royalty Holdings Corporation ("HoldCo"), pursuant to which, among other things, the Parent acquired all of the outstanding shares of the common stock of the Issuer, effective July 14, 2026 (the "Merger").

F7: The Reporting Persons received the following in exchange for each share of the Issuer's common stock disposed of in connection with the Merger: $39.00 in cash per share of common stock and an amount of contingent value rights per share of common stock for potential cash payments.

F6: Securities held in certain Partners managed accounts (the "Partners Managed Accounts"). Partners, as the investment manager of the Partners Managed Accounts, may be deemed to beneficially own the securities held by the Partners Managed Accounts. As the investment adviser and general partner of Partners, BVF Inc. may be deemed to beneficially own the securities held by the Partners Managed Accounts. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities held by the Partners Managed Accounts.