SIGA

SEC source: 0001193125-26-266423 · ownership.xml · derivative · entry 4

Marshall Joseph W III · CIK 0001458584 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,169

Underlying: Common Stock, par value $.0001 per share · 34,169 shares

Expires not disclosed

F4 · derivative.exercise_price: RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors.

F5 · derivative.exercise_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

F5 · derivative.expiration_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

SEC source: 0001193125-26-266423 · ownership.xml · derivative · entry 3

Marshall Joseph W III · CIK 0001458584 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 24,116 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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

F3 · derivative.exercise_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

F3 · derivative.expiration_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

SEC source: 0001193125-26-266423 · ownership.xml · nonDerivative · entry 2

Marshall Joseph W III · CIK 0001458584 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 246,523

F2 · kind: Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs.

SEC source: 0001193125-26-266423 · ownership.xml · nonDerivative · entry 1

Marshall Joseph W III · CIK 0001458584 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 253,758

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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

SEC source: 0001193125-26-266418 · ownership.xml · derivative · entry 4

KEANE JOHN M · CIK 0001267719 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,169

Underlying: Common Stock, par value $.0001 per share · 34,169 shares

Expires not disclosed

F4 · derivative.exercise_price: RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors.

F5 · derivative.exercise_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

F5 · derivative.expiration_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

SEC source: 0001193125-26-266418 · ownership.xml · derivative · entry 3

KEANE JOHN M · CIK 0001267719 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 24,116 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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

F3 · derivative.exercise_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

F3 · derivative.expiration_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

SEC source: 0001193125-26-266418 · ownership.xml · nonDerivative · entry 2

KEANE JOHN M · CIK 0001267719 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,881

F2 · kind: Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs.

SEC source: 0001193125-26-266418 · ownership.xml · nonDerivative · entry 1

KEANE JOHN M · CIK 0001267719 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,116

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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

SEC source: 0001193125-26-266414 · ownership.xml · derivative · entry 4

Ford Harold Eugene Jr. · CIK 0001799464 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,169

Underlying: Common Stock, par value $.0001 per share · 34,169 shares

Expires not disclosed

F4 · derivative.exercise_price: RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors.

F5 · derivative.exercise_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

F5 · derivative.expiration_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

SEC source: 0001193125-26-266414 · ownership.xml · derivative · entry 3

Ford Harold Eugene Jr. · CIK 0001799464 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 24,116 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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

F3 · derivative.exercise_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

F3 · derivative.expiration_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

SEC source: 0001193125-26-266414 · ownership.xml · nonDerivative · entry 2

Ford Harold Eugene Jr. · CIK 0001799464 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,538

F2 · kind: Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs.

SEC source: 0001193125-26-266414 · ownership.xml · nonDerivative · entry 1

Ford Harold Eugene Jr. · CIK 0001799464 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,773

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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

SEC source: 0001193125-26-266410 · ownership.xml · derivative · entry 4

Phillips Holly L. · CIK 0001867723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,169

Underlying: Common Stock, par value $.0001 per share · 34,169 shares

Expires not disclosed

F4 · derivative.exercise_price: RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors.

F5 · derivative.exercise_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

F5 · derivative.expiration_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

SEC source: 0001193125-26-266410 · ownership.xml · derivative · entry 3

Phillips Holly L. · CIK 0001867723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 24,116 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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

F3 · derivative.exercise_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

F3 · derivative.expiration_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

SEC source: 0001193125-26-266410 · ownership.xml · nonDerivative · entry 2

Phillips Holly L. · CIK 0001867723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,754

F2 · kind: Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs.

SEC source: 0001193125-26-266410 · ownership.xml · nonDerivative · entry 1

Phillips Holly L. · CIK 0001867723 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,989

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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

SEC source: 0001193125-26-266406 · ownership.xml · derivative · entry 4

Nemirovsky Julian · CIK 0001835535 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,169

Underlying: Common Stock, par value $.0001 per share · 34,169 shares

Expires not disclosed

F4 · derivative.exercise_price: RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors.

F5 · derivative.exercise_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

F5 · derivative.expiration_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

SEC source: 0001193125-26-266406 · ownership.xml · derivative · entry 3

Nemirovsky Julian · CIK 0001835535 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 24,116 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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

F3 · derivative.exercise_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

F3 · derivative.expiration_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

SEC source: 0001193125-26-266406 · ownership.xml · nonDerivative · entry 2

Nemirovsky Julian · CIK 0001835535 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,754

F2 · kind: Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs.

SEC source: 0001193125-26-266406 · ownership.xml · nonDerivative · entry 1

Nemirovsky Julian · CIK 0001835535 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,989

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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

SEC source: 0001193125-26-266399 · ownership.xml · derivative · entry 4

DURNAN JAYMIE A · CIK 0001187313 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,169

Underlying: Common Stock, par value $.0001 per share · 34,169 shares

Expires not disclosed

F4 · derivative.exercise_price: RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors.

F5 · derivative.exercise_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

F5 · derivative.expiration_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

SEC source: 0001193125-26-266399 · ownership.xml · derivative · entry 3

DURNAN JAYMIE A · CIK 0001187313 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 24,116 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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

F3 · derivative.exercise_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

F3 · derivative.expiration_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

SEC source: 0001193125-26-266399 · ownership.xml · nonDerivative · entry 2

DURNAN JAYMIE A · CIK 0001187313 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,754

F2 · kind: Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs.

SEC source: 0001193125-26-266399 · ownership.xml · nonDerivative · entry 1

DURNAN JAYMIE A · CIK 0001187313 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,989

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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

SEC source: 0001193125-26-266390 · ownership.xml · derivative · entry 4

Nabel Gary J. · CIK 0001867450 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,169

Underlying: Common Stock, par value $.0001 per share · 34,169 shares

Expires not disclosed

F4 · derivative.exercise_price: RSUs represent contingent rights to receive common stock of the Company on a one-for-one basis, of which up to 10,251 RSUs are expected to settle in cash value thereof but may be settled in shares at the discretion of the Board of Directors.

F5 · derivative.exercise_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

F5 · derivative.expiration_date: The RSUs fully vest on the date of the Company's 2027 annual meeting of stockholders.

SEC source: 0001193125-26-266390 · ownership.xml · derivative · entry 3

Nabel Gary J. · CIK 0001867450 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $.0001 per share · 24,116 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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

F3 · derivative.exercise_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

F3 · derivative.expiration_date: The RSUs were granted on June 10, 2025, and fully vested on the date of the Company's 2026 annual meeting of stockholders.

SEC source: 0001193125-26-266390 · ownership.xml · nonDerivative · entry 2

Nabel Gary J. · CIK 0001867450 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,754

F2 · kind: Reflects RSUs that were cash-settled, per the terms of the compensation program for Board Directors and as noted on the Form 4 filed on June 11, 2025. Partial cash-settlement of RSUs under the Board compensation program is designed to address tax obligations in connection with the vesting of RSUs.

SEC source: 0001193125-26-266390 · ownership.xml · nonDerivative · entry 1

Nabel Gary J. · CIK 0001867450 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,989

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: Restricted stock units ("RSUs") represent contingent rights to receive common stock of SIGA Technologies, Inc. (the "Company") on a one-for-one basis.

SEC source: 0001193125-26-126758 · ownership.xml · derivative · entry 3

Miller Larry R. · CIK 0002016490 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,921

Underlying: Common Stock, par value $.0001 per share · 6,920 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: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-126758 · ownership.xml · nonDerivative · entry 2

Miller Larry R. · CIK 0002016490 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,912

F2 · shares: Represents the withholding by the Issuer of shares of Common Stock (based on $4.99 per share, the closing stock price on March 25, 2026) to satisfy tax withholding obligations associated with the vesting of RSUs and the consequent issuance of Common Stock.

SEC source: 0001193125-26-126758 · ownership.xml · nonDerivative · entry 1

Miller Larry R. · CIK 0002016490 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,438

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: Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on March 25, 2024.

SEC source: 0001193125-26-110801 · ownership.xml · derivative · entry 4

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,228

Underlying: Common Stock, par value $.0001 per share · 55,228 shares

Expires not disclosed

F3 · derivative.exercise_price: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110801 · ownership.xml · derivative · entry 3

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,008

Underlying: Common Stock, par value $.0001 per share · 11,503 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: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110801 · ownership.xml · nonDerivative · entry 2

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 280,493

F2 · shares: Represents the withholding by the Issuer of shares of Common Stock (based on $5.26 per share, the closing stock price on March 13, 2026) to satisfy tax withholding obligations associated with the vesting of RSUs and the consequent issuance of Common Stock.

SEC source: 0001193125-26-110801 · ownership.xml · nonDerivative · entry 1

Luckshire Daniel J · CIK 0001512677 · Executive VP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 286,567

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: Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on March 13, 2025.

SEC source: 0001193125-26-110790 · ownership.xml · derivative · entry 4

Hruby Dennis E · CIK 0001301548 · EVP & Chief Scientific Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,942

Underlying: Common Stock, par value $.0001 per share · 54,942 shares

Expires not disclosed

F3 · derivative.exercise_price: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110790 · ownership.xml · derivative · entry 3

Hruby Dennis E · CIK 0001301548 · EVP & Chief Scientific Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,891

Underlying: Common Stock, par value $.0001 per share · 11,445 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: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110790 · ownership.xml · nonDerivative · entry 2

Hruby Dennis E · CIK 0001301548 · EVP & Chief Scientific Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 198,537

F2 · shares: Represents the withholding by the Issuer of shares of Common Stock (based on $5.26 per share, the closing stock price on March 13, 2026) to satisfy tax withholding obligations associated with the vesting of RSUs and the consequent issuance of Common Stock.

SEC source: 0001193125-26-110790 · ownership.xml · nonDerivative · entry 1

Hruby Dennis E · CIK 0001301548 · EVP & Chief Scientific Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 202,492

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: Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on March 13, 2025.

SEC source: 0001193125-26-110770 · ownership.xml · derivative · entry 4

Miller Larry R. · CIK 0002016490 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,060

Underlying: Common Stock, par value $.0001 per share · 68,060 shares

Expires not disclosed

F3 · derivative.exercise_price: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110770 · ownership.xml · derivative · entry 3

Miller Larry R. · CIK 0002016490 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,523

Underlying: Common Stock, par value $.0001 per share · 21,261 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: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110770 · ownership.xml · nonDerivative · entry 2

Miller Larry R. · CIK 0002016490 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,518

F2 · shares: Represents the withholding by the Issuer of shares of Common Stock (based on $5.26 per share, the closing stock price on March 13, 2026) to satisfy tax withholding obligations associated with the vesting of RSUs and the consequent issuance of Common Stock.

SEC source: 0001193125-26-110770 · ownership.xml · nonDerivative · entry 1

Miller Larry R. · CIK 0002016490 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,705

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: Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on March 13, 2025.

SEC source: 0001193125-26-110759 · ownership.xml · derivative · entry 4

Nguyen Diem · CIK 0001814338 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 272,243

Underlying: Common Stock, par value $.0001 per share · 272,243 shares

Expires not disclosed

F3 · derivative.exercise_price: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110759 · ownership.xml · derivative · entry 3

Nguyen Diem · CIK 0001814338 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,092

Underlying: Common Stock, par value $.0001 per share · 85,045 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: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-110759 · ownership.xml · nonDerivative · entry 2

Nguyen Diem · CIK 0001814338 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,767

F2 · shares: Represents the withholding by the Issuer of shares of Common Stock (based on $5.26 per share, the closing stock price on March 13, 2026) to satisfy tax withholding obligations associated with the vesting of RSUs and the consequent issuance of Common Stock.

SEC source: 0001193125-26-110759 · ownership.xml · nonDerivative · entry 1

Nguyen Diem · CIK 0001814338 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 185,796

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: Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on March 13, 2025.

SEC source: 0001193125-26-027202 · ownership.xml · derivative · entry 3

Nguyen Diem · CIK 0001814338 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,903

Underlying: Common Stock, par value $.0001 per share · 55,902 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: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.exercise_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

F3 · derivative.expiration_date: RSUs represent contingent rights to receive Common Stock on a one-for-one basis. The RSUs vest over three years, one-third on each of the first three anniversaries of the date of grant.

SEC source: 0001193125-26-027202 · ownership.xml · nonDerivative · entry 2

Nguyen Diem · CIK 0001814338 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,751

F2 · shares: Represents the withholding by the Issuer of shares of Common Stock (based on $6.82 per share, the closing stock price on January 27, 2026) to satisfy tax withholding obligations associated with the vesting of RSUs and the consequent issuance of Common Stock.

SEC source: 0001193125-26-027202 · ownership.xml · nonDerivative · entry 1

Nguyen Diem · CIK 0001814338 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,555

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: Represents the acquisition of Common Stock from the vesting of one-third of the restricted stock units ("RSUs") granted on January 27, 2024.