MacDonald Kelly

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · derivative · entry 12

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 28,283 shares

Expires not disclosed

F11 · derivative.exercise_price: The RSUs were granted on February 13, 2025, and were originally scheduled to vest over three years, with 1/3 vesting on each anniversary of February 13, 2025.

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F10 · price: Pursuant to the terms of the Merger Agreement, at the Effective Time, each RSU award that was outstanding as of immediately prior to the Effective Time, whether vested or unvested, was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares issuable in settlement of such RSU award immediately prior to the Effective Time without regard to vesting, multiplied by (ii) the Offer Price, except that in the case of any portion of an RSU award granted in calendar year 2025 that remained unvested as of immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F10 · derivative.exercise_date: Pursuant to the terms of the Merger Agreement, at the Effective Time, each RSU award that was outstanding as of immediately prior to the Effective Time, whether vested or unvested, was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares issuable in settlement of such RSU award immediately prior to the Effective Time without regard to vesting, multiplied by (ii) the Offer Price, except that in the case of any portion of an RSU award granted in calendar year 2025 that remained unvested as of immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F10 · derivative.expiration_date: Pursuant to the terms of the Merger Agreement, at the Effective Time, each RSU award that was outstanding as of immediately prior to the Effective Time, whether vested or unvested, was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares issuable in settlement of such RSU award immediately prior to the Effective Time without regard to vesting, multiplied by (ii) the Offer Price, except that in the case of any portion of an RSU award granted in calendar year 2025 that remained unvested as of immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · derivative · entry 11

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 15,476 shares

Expires not disclosed

F9 · derivative.exercise_price: The restricted stock units ("RSUs") were granted on February 15, 2024, and were originally scheduled to vest over three years, with 1/3 vesting on each anniversary of February 15, 2024.

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F10 · price: Pursuant to the terms of the Merger Agreement, at the Effective Time, each RSU award that was outstanding as of immediately prior to the Effective Time, whether vested or unvested, was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares issuable in settlement of such RSU award immediately prior to the Effective Time without regard to vesting, multiplied by (ii) the Offer Price, except that in the case of any portion of an RSU award granted in calendar year 2025 that remained unvested as of immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F10 · derivative.exercise_date: Pursuant to the terms of the Merger Agreement, at the Effective Time, each RSU award that was outstanding as of immediately prior to the Effective Time, whether vested or unvested, was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares issuable in settlement of such RSU award immediately prior to the Effective Time without regard to vesting, multiplied by (ii) the Offer Price, except that in the case of any portion of an RSU award granted in calendar year 2025 that remained unvested as of immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F10 · derivative.expiration_date: Pursuant to the terms of the Merger Agreement, at the Effective Time, each RSU award that was outstanding as of immediately prior to the Effective Time, whether vested or unvested, was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares issuable in settlement of such RSU award immediately prior to the Effective Time without regard to vesting, multiplied by (ii) the Offer Price, except that in the case of any portion of an RSU award granted in calendar year 2025 that remained unvested as of immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · derivative · entry 10

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 70,000 shares

Expires not disclosed

F8 · security: The stock option was granted to the Reporting Person in 2025.

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F7 · price: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.exercise_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.expiration_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · derivative · entry 9

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 65,000 shares

Expires not disclosed

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F7 · price: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.exercise_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.expiration_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · derivative · entry 8

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 100,000 shares

Expires not disclosed

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F7 · price: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.exercise_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.expiration_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · derivative · entry 7

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 90,500 shares

Expires not disclosed

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F7 · price: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.exercise_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.expiration_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · derivative · entry 6

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 350,000 shares

Expires not disclosed

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F7 · price: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.exercise_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

F7 · derivative.expiration_date: Pursuant to the terms of the Merger Agreement, (i) each stock option that was outstanding as of immediately prior to the Effective Time (other than a stock option granted in calendar year 2025 became fully vested immediately prior to the Effective Time, and (ii) at the Effective Time, each stock option that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares subject to such stock option immediately prior to the Effective Time, without regard to vesting, multiplied by (ii) the excess of the Offer Price over the exercise price per share of such stock option, except that in the case of any portion of a stock option granted in calendar year 2025 that remained unvested as of the immediately prior to the Effective Time, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · nonDerivative · entry 5

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F5 · price: Pursuant to the terms of the Merger Agreement, at the Effective Time, each PSU award that was outstanding as of immediately prior to the Effective Time, whether vested or unvested, was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares issuable in settlement of such PSU award immediately prior to the Effective Time based on attainment of the performance goal at 150% of the target level, without regard to vesting, multiplied by (ii) the Offer Price, except that in the case of any PSU award that was granted in calendar year 2025, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · nonDerivative · entry 4

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,424

F6 · price: Represents PSUs previously granted to the Reporting Person in 2025, which vest based on rTSR over a performance period ending on December 31, 2027.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · nonDerivative · entry 3

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F5 · price: Pursuant to the terms of the Merger Agreement, at the Effective Time, each PSU award that was outstanding as of immediately prior to the Effective Time, whether vested or unvested, was cancelled and converted into the right to receive cash in an amount equal to (i) the number of shares issuable in settlement of such PSU award immediately prior to the Effective Time based on attainment of the performance goal at 150% of the target level, without regard to vesting, multiplied by (ii) the Offer Price, except that in the case of any PSU award that was granted in calendar year 2025, 50% of such cash amount is subject to vesting requirements and scheduled to vest 6 months after the Effective Time, as described in the Merger Agreement.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,430

F4 · price: Represents performance-based restricted stock units ("PSUs") previously granted to the Reporting Person in 2024, which vest based on how the Issuer's total stockholder return compares to the total stockholder return of an indexed group of companies ("rTSR") over a performance period ending on December 31, 2026.

SEC source: 0001781117-26-000002 · form4-02102026_040217.xml · nonDerivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · kind: This Form 4 reports securities transacted pursuant to the Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent ("Purchaser").

F2 · kind: Pursuant to the Merger Agreement, Purchaser completed a tender offer to acquire all of the issued and outstanding shares of common stock of the Issuer, par value $0.001 per share (the "Common Stock"), for $15.50 per share (the "Offer Price"), in cash, without interest and subject to any applicable withholding of taxes. On February 10, 2026, Purchaser merged with and into the Issuer, with the Issuer surviving as an indirect wholly owned subsidiary of Parent (the effective time of such merger, the "Effective Time").

F3 · price: Pursuant to the terms of the Merger Agreement, at the Effective Time, each share of Common Stock held by the Reporting Person was tendered in exchange for the Offer Price.

SEC source: 0001628280-25-058992 · wk-form4_1767042911.xml · nonDerivative · entry 4

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,204

F4 · shares: Shares withheld by the Issuer to satisfy tax withholding requirements on vesting of PSUs and RSUs.

SEC source: 0001628280-25-058992 · wk-form4_1767042911.xml · derivative · entry 6

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,282

Underlying: Common Stock · 14,141 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of the Issuer's common stock.

F1 · kind: On December 23, 2025 (the "Effective Date"), in connection with the execution of an Agreement and Plan of Merger dated as of the Effective Date (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent, the Board of Directors of the Issuer approved acceleration of vesting of certain performance-based restricted stock units ("PSUs") and restricted stock units ("RSUs") previously granted to the Reporting Person, effective as of the Effective Date.

F3 · price: Each RSU represents a contingent right to receive one share of the Issuer's common stock.

F6 · derivative.exercise_date: The RSUs were granted on February 13, 2025, and were originally scheduled to vest over three years, with 1/3 vesting on each anniversary of February 13, 2025.

F6 · derivative.expiration_date: The RSUs were granted on February 13, 2025, and were originally scheduled to vest over three years, with 1/3 vesting on each anniversary of February 13, 2025.

SEC source: 0001628280-25-058992 · wk-form4_1767042911.xml · derivative · entry 5

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,477

Underlying: Common Stock · 15,477 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of the Issuer's common stock.

F1 · kind: On December 23, 2025 (the "Effective Date"), in connection with the execution of an Agreement and Plan of Merger dated as of the Effective Date (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent, the Board of Directors of the Issuer approved acceleration of vesting of certain performance-based restricted stock units ("PSUs") and restricted stock units ("RSUs") previously granted to the Reporting Person, effective as of the Effective Date.

F3 · price: Each RSU represents a contingent right to receive one share of the Issuer's common stock.

F5 · derivative.exercise_date: The RSUs were granted on February 15, 2024, and were originally scheduled to vest over three years, with 1/3 vesting on each anniversary of February 15, 2024.

F5 · derivative.expiration_date: The RSUs were granted on February 15, 2024, and were originally scheduled to vest over three years, with 1/3 vesting on each anniversary of February 15, 2024.

SEC source: 0001628280-25-058992 · wk-form4_1767042911.xml · nonDerivative · entry 3

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,345

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: On December 23, 2025 (the "Effective Date"), in connection with the execution of an Agreement and Plan of Merger dated as of the Effective Date (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent, the Board of Directors of the Issuer approved acceleration of vesting of certain performance-based restricted stock units ("PSUs") and restricted stock units ("RSUs") previously granted to the Reporting Person, effective as of the Effective Date.

F3 · price: Each RSU represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001628280-25-058992 · wk-form4_1767042911.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,204

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: On December 23, 2025 (the "Effective Date"), in connection with the execution of an Agreement and Plan of Merger dated as of the Effective Date (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent, the Board of Directors of the Issuer approved acceleration of vesting of certain performance-based restricted stock units ("PSUs") and restricted stock units ("RSUs") previously granted to the Reporting Person, effective as of the Effective Date.

F3 · price: Each RSU represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001628280-25-058992 · wk-form4_1767042911.xml · nonDerivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,727

F1 · kind: On December 23, 2025 (the "Effective Date"), in connection with the execution of an Agreement and Plan of Merger dated as of the Effective Date (the "Merger Agreement") by and among the Issuer, SANOFI, a French societe anonyme ("Parent"), and Samba Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent, the Board of Directors of the Issuer approved acceleration of vesting of certain performance-based restricted stock units ("PSUs") and restricted stock units ("RSUs") previously granted to the Reporting Person, effective as of the Effective Date.

F2 · price: Represents PSUs previously granted to the Reporting Person that vest based on how the Issuer's total stockholder return compares to the total stockholder return of an indexed group of companies ("rTSR") over a performance period ending on December 31, 2025. Each PSU represents a contingent right to receive one share of common stock. On the Effective Date, the Board of Directors of the Issuer determined that these PSUs (which represent 125% of the target number of PSUs) were earned according to achievement of the rTSR performance condition over a shortened performance period, with the Issuer's total stockholder return determined based on the amount payable for a share of the Issuer's common stock pursuant to the Merger Agreement ($15.50), and approved such acceleration of vesting of the earned PSUs.

SEC source: 0001029142-25-000055 · wk-form4_1740097777.xml · derivative · entry 3

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,953

Underlying: Common Stock · 15,477 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

F1 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

F1 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

F1 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

SEC source: 0001029142-25-000055 · wk-form4_1740097777.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,227

F2 · shares: Shares withheld by Dynavax Technologies Corporation to satisfy tax withholding requirements on vesting of restricted stock units.

SEC source: 0001029142-25-000055 · wk-form4_1740097777.xml · nonDerivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,202

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

F1 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

SEC source: 0001029142-25-000035 · wk-form4_1739916608.xml · derivative · entry 6

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,424

Underlying: Common Stock · 42,424 shares

Expires not disclosed

F5 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 13, 2025.

F5 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 13, 2025.

F5 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 13, 2025.

F5 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 13, 2025.

SEC source: 0001029142-25-000035 · wk-form4_1739916608.xml · derivative · entry 5

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,000

Underlying: Common Stock · 70,000 shares

Expires 2032-02-13

F4 · price: This option grant will vest over three (3) years with one third (1/3) of the shares subject to the option vesting twelve months after the grant date of February 13, 2025, and one thirty-sixth (1/36) of the shares subject to the option vesting each month thereafter.

F3 · derivative.exercise_date: This option grant will vest over three (3) years with one third (1/3) of the shares subject to the option vesting twelve months after the grant date of February 13, 2025, and one thirty-sixth (1/36) of the shares subject to the option vesting each month thereafter.

SEC source: 0001029142-25-000035 · wk-form4_1739916608.xml · derivative · entry 4

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 16,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock. These RSUs vested upon the Issuer's achievement of a certain performance condition.

F1 · price: Each RSU represents a contingent right to receive one share of common stock. These RSUs vested upon the Issuer's achievement of a certain performance condition.

F1 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of common stock. These RSUs vested upon the Issuer's achievement of a certain performance condition.

F1 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of common stock. These RSUs vested upon the Issuer's achievement of a certain performance condition.

SEC source: 0001029142-25-000035 · wk-form4_1739916608.xml · derivative · entry 3

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,000

Underlying: Common Stock · 16,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock. These RSUs vested upon the Issuer's achievement of a certain performance condition.

F1 · price: Each RSU represents a contingent right to receive one share of common stock. These RSUs vested upon the Issuer's achievement of a certain performance condition.

F1 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of common stock. These RSUs vested upon the Issuer's achievement of a certain performance condition.

F1 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of common stock. These RSUs vested upon the Issuer's achievement of a certain performance condition.

SEC source: 0001029142-25-000035 · wk-form4_1739916608.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,725

F2 · shares: Shares withheld by Dynavax Technologies Corporation to satisfy tax withholding requirements on vesting of restricted stock units.

SEC source: 0001029142-25-000035 · wk-form4_1739916608.xml · nonDerivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,043

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each RSU represents a contingent right to receive one share of common stock. These RSUs vested upon the Issuer's achievement of a certain performance condition.

SEC source: 0001029142-25-000022 · wk-form4_1739397585.xml · derivative · entry 3

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F1 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F1 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F1 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

SEC source: 0001029142-25-000022 · wk-form4_1739397585.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,043

F2 · shares: Shares withheld by Dynavax Technologies Corporation to satisfy tax withholding requirements on vesting of restricted stock units.

SEC source: 0001029142-25-000022 · wk-form4_1739397585.xml · nonDerivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,040

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

SEC source: 0001209191-24-003548 · doc4.xml · derivative · entry 2

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,430

Underlying: Common Stock · 46,430 shares

Expires not disclosed

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

F1 · kind: Code A: Grant, award or other acquisition

F3 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

F3 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

F3 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 15, 2024.

SEC source: 0001209191-24-003548 · doc4.xml · derivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,000

Underlying: Common Stock · 65,000 shares

Expires 2031-02-15

F1 · kind: Code A: Grant, award or other acquisition

F2 · derivative.exercise_date: This option grant will vest over three (3) years with one third (1/3) of the shares subject to the option vesting twelve months after the grant date of February 15, 2024, and one thirty-sixth (1/36) of the shares subject to the option vesting each month thereafter.

SEC source: 0001209191-24-003196 · doc4.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,707

F3 · kind: Code F: Payment of exercise price or tax liability by delivering or withholding securities

F4 · shares: Shares withheld by Dynavax Technologies Corporation to satisfy tax withholding requirements on vesting of restricted stock units.

SEC source: 0001209191-24-003196 · doc4.xml · derivative · entry 3

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,333

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F1 · kind: Code M: Exercise or conversion of derivative security

F2 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F2 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F2 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

SEC source: 0001209191-24-003196 · doc4.xml · nonDerivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,692

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Code M: Exercise or conversion of derivative security

F2 · shares: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F2 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

SEC source: 0001209191-23-014170 · doc4.xml · derivative · entry 3

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,666

Underlying: Common Stock · 5,334 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F1 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F1 · derivative.exercise_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F1 · derivative.expiration_date: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

SEC source: 0001209191-23-014170 · doc4.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,359

F2 · shares: The reporting person is reporting the withholding by Dynavax Technologies Corporation of 2,975 shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the delivery of common stock to the reporting person on February 27, 2023.

SEC source: 0001209191-23-014170 · doc4.xml · nonDerivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,334

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F1 · price: Each RSU represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

SEC source: 0001209191-23-011297 · doc4.xml · derivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Stock · 100,000 shares

Expires 2030-02-15

F1 · price: This option grant will vest over three (3) years with one third (1/3) of the shares subject to the option vesting twelve months after the grant date of February 16, 2023, and one thirty-sixth (1/36) of the shares subject to the option vesting each month thereafter.

F1 · derivative.exercise_date: This option grant will vest over three (3) years with one third (1/3) of the shares subject to the option vesting twelve months after the grant date of February 16, 2023, and one thirty-sixth (1/36) of the shares subject to the option vesting each month thereafter.

SEC source: 0001209191-22-009592 · doc4.xml · derivative · entry 2

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,000

Underlying: Common Stock · 16,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F2 · price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F2 · derivative.exercise_date: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

F2 · derivative.expiration_date: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of common stock. The RSUs vest over three years with 1/3 vesting on each annual anniversary of February 10, 2022

SEC source: 0001209191-22-009592 · doc4.xml · derivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,500

Underlying: Common Stock · 90,500 shares

Expires 2029-02-09

F1 · derivative.exercise_date: This option grant will vest over three (3) years with one third (1/3) of the shares subject to the option vesting twelve months after the grant date of February 10, 2022, and one thirty-sixth (1/36) of the shares subject to the option vesting each month thereafter.

SEC source: 0001209191-21-016520 · doc4.xml · derivative · entry 1

MacDonald Kelly · CIK 0001781117 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 350,000

Underlying: Common Stock · 350,000 shares

Expires 2028-02-29

F1 · price: This option grant will vest over three (3) years with one third (1/3) of the shares subject to the option vesting twelve months after the grant date of March 1, 2021, and one thirty-sixth (1/36) of the shares subject to the option vesting each month thereafter.

F1 · derivative.exercise_date: This option grant will vest over three (3) years with one third (1/3) of the shares subject to the option vesting twelve months after the grant date of March 1, 2021, and one thirty-sixth (1/36) of the shares subject to the option vesting each month thereafter.

SEC source: 0001209191-20-062229 · doc4.xml · derivative · entry 3

MacDonald Kelly · CIK 0001781117 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 5,639 shares

Expires 2026-03-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: This option, granted as an annual performance award, is presently exercisable in full.

SEC source: 0001209191-20-062229 · doc4.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,041

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001209191-20-062229 · doc4.xml · nonDerivative · entry 1

MacDonald Kelly · CIK 0001781117 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 98,680

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-20-058270 · doc4.xml · derivative · entry 3

MacDonald Kelly · CIK 0001781117 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 3,561 shares

Expires 2025-10-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: This option, granted as a promotion award, is presently exercisable in full.

SEC source: 0001209191-20-058270 · doc4.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,041

F1 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001209191-20-058270 · doc4.xml · nonDerivative · entry 1

MacDonald Kelly · CIK 0001781117 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,602

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-20-057611 · doc4.xml · nonDerivative · entry 3

MacDonald Kelly · CIK 0001781117 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,041

F3 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. This sale was made to cover tax withholding obligations in connection with vesting and settlement of approximately 25% of the reporting person's restricted stock units granted on December 15, 2017.

SEC source: 0001209191-20-057611 · doc4.xml · nonDerivative · entry 2

MacDonald Kelly · CIK 0001781117 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,141

F2 · kind: This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. This sale was made to cover tax withholding obligations in connection with vesting and settlement of approximately 25% of the reporting person's restricted stock units granted on December 16, 2016.