Smith R Sharon

SEC source: 0001628280-26-065275 · wk-form4_1791328854.xml · derivative · entry 4

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,240

Underlying: Common Stock · 52,894 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.

F5 · derivative.exercise_price: Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.

F6 · derivative.exercise_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F6 · derivative.expiration_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0001628280-26-065275 · wk-form4_1791328854.xml · derivative · entry 3

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,881

Underlying: Common Stock · 55,433 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: Represents the aggregate amount of RSUs that vested.

F4 · derivative.exercise_date: The RSUs vested pursuant to the first of three equal annual installments under the reporting person's 2025 Long Term Incentive Plan award, which vests in equal installments on October 3, 2026, July 9, 2027, and July 9, 2028.

F4 · derivative.expiration_date: The RSUs vested pursuant to the first of three equal annual installments under the reporting person's 2025 Long Term Incentive Plan award, which vests in equal installments on October 3, 2026, July 9, 2027, and July 9, 2028.

SEC source: 0001628280-26-065275 · wk-form4_1791328854.xml · nonDerivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 156,326

F2 · balance_after: Represents the amount of RSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0001628280-26-065275 · wk-form4_1791328854.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 158,865

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: The reporting person acquired shares of common stock Octave Specialty Group, Inc. (the "Company") upon the vesting and settlement of a portion of the reporting person's restricted stock unit ("RSU") awards as part of their 2025 Long Term Incentive Plan.

SEC source: 0001628280-26-048005 · wk-form4_1783973075.xml · derivative · entry 3

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 132,093

Underlying: Common Stock · 11,779 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 common stock of the Company's common stock.

F4 · derivative.exercise_date: The RSUs vested pursuant to the first of three equal annual installments under the reporting person's 2025 Long Term Incentive Plan award, which vests in equal installments on July 9, 2026, July 9, 2027, and July 9, 2028.

F4 · derivative.expiration_date: The RSUs vested pursuant to the first of three equal annual installments under the reporting person's 2025 Long Term Incentive Plan award, which vests in equal installments on July 9, 2026, July 9, 2027, and July 9, 2028.

SEC source: 0001628280-26-048005 · wk-form4_1783973075.xml · nonDerivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 156,326

F2 · balance_after: Represents the amount of RSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0001628280-26-048005 · wk-form4_1783973075.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 160,961

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: The reporting person acquired shares of common stock Octave Specialty Group, Inc. (the "Company") upon the vesting and settlement of a portion of the reporting person's restricted stock unit ("RSU") awards as part of their 2025 Long Term Incentive Plan.

SEC source: 0001628280-26-021059 · wk-form4_1774472067.xml · derivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 120,314

Underlying: Common Stock · 24,375 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Octave Specialty Group, Inc. (the "Company").

F2 · derivative.exercise_date: On March 23, 2026 the reporting person received a grant of 24,375 RSUs as part of her 2026 Long Term Incentive Plan award. The RSUs will vest in three equal annual installments commencing March 23, 2027, March 23, 2028, and March 23, 2029.

F2 · derivative.expiration_date: On March 23, 2026 the reporting person received a grant of 24,375 RSUs as part of her 2026 Long Term Incentive Plan award. The RSUs will vest in three equal annual installments commencing March 23, 2027, March 23, 2028, and March 23, 2029.

SEC source: 0001628280-26-015345 · wk-form4_1772748780.xml · derivative · entry 4

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,486

Underlying: Common Stock · 8,720 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.

F5 · derivative.exercise_price: Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.

F6 · derivative.exercise_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F6 · derivative.expiration_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0001628280-26-015345 · wk-form4_1772748780.xml · derivative · entry 3

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,939

Underlying: Common Stock · 10,261 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: Each RSU represents a contingent right to receive one share of the common stock of the Company.

F4 · derivative.exercise_date: Represents the aggregate amount of RSUs that vested.

F4 · derivative.expiration_date: Represents the aggregate amount of RSUs that vested.

SEC source: 0001628280-26-015345 · wk-form4_1772748780.xml · nonDerivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,182

F2 · shares: Represents the amount of RSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0001628280-26-015345 · wk-form4_1772748780.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,723

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: The reporting person acquired shares of common stock of Octave Specialty Group, Inc. (the "Company") upon the vesting and settlement of a portion of the reporting person's 2023 and 2024 restrictive stock unit ("RSU") awards.

SEC source: 0001707461-25-000005 · wk-form4_1763155711.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,952

F1 · shares: Shares were purchased as gift to the reporting persons son.

SEC source: 0001628280-25-044138 · wk-form4a_1759525170.xml · derivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 106,200

Underlying: Common Stock · 55,433 shares

Expires not disclosed

F3 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of the Company.

F4 · derivative.exercise_date: On October 3, 2025 the reporting person received a special RSU grant that will vest and become non-forfeitable after one year (subject to limited exceptions), but will not settle until the earlier of the fifth (5) year anniversary of the grant date or the reporting person's termination date, provided such termination occurs after the one year vesting date.

F4 · derivative.expiration_date: On October 3, 2025 the reporting person received a special RSU grant that will vest and become non-forfeitable after one year (subject to limited exceptions), but will not settle until the earlier of the fifth (5) year anniversary of the grant date or the reporting person's termination date, provided such termination occurs after the one year vesting date.

SEC source: 0001628280-25-044138 · wk-form4a_1759525170.xml · derivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 284,125

Underlying: Common Stock · 284,125 shares

Expires 2035-10-03

F1 · derivative.exercise_date: The Performance Stock Option shall be eligible to vest beginning one year after the grant date based on Ambac Financial Group's (the "Company") achievement of the certain price hurdles related to the shares of Common Stock, during the five (5) year period following the grant date as follows: (i) 40 % shall vest on the date on which the sustained stock price first exceeds $18.00 per share; (ii) 20% shall vest on the date on which the sustained stock price first exceeds $21.50 per share; (iii) 20% shall vest on the date on which the sustained stock price first exceeds $25.00 per share; and (iv) 20% shall vest on the date on which the sustained stock price first exceeds $30.00 per share.

F2 · derivative.expiration_date: On October 3, 2025, the reporting person filed a Form 4 that inadvertently reported the expiration date of the performance stock option award as October 3, 2025. The correct expiration date is October 3, 2035.

SEC source: 0001628280-25-044067 · wk-form4_1759522834.xml · derivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 106,200

Underlying: Common Stock · 55,433 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of the Company.

F3 · derivative.exercise_date: On October 3, 2025 the reporting person received a special RSU grant that will vest and become non-forfeitable after one year (subject to limited exceptions), but will not settle until the earlier of the fifth (5) year anniversary of the grant date or the reporting person's termination date, provided such termination occurs after the one year vesting date.

F3 · derivative.expiration_date: On October 3, 2025 the reporting person received a special RSU grant that will vest and become non-forfeitable after one year (subject to limited exceptions), but will not settle until the earlier of the fifth (5) year anniversary of the grant date or the reporting person's termination date, provided such termination occurs after the one year vesting date.

SEC source: 0001628280-25-044067 · wk-form4_1759522834.xml · derivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 284,125

Underlying: Common Stock · 284,125 shares

Expires 2025-10-03

F1 · derivative.exercise_date: The Performance Stock Option shall be eligible to vest beginning one year after the grant date based on Ambac Financial Group's (the "Company") achievement of the certain price hurdles related to the shares of Common Stock, during the five (5) year period following the grant date as follows: (i) 40 % shall vest on the date on which the sustained stock price first exceeds $18.00 per share; (ii) 20% shall vest on the date on which the sustained stock price first exceeds $21.50 per share; (iii) 20% shall vest on the date on which the sustained stock price first exceeds $25.00 per share; and (iv) 20% shall vest on the date on which the sustained stock price first exceeds $30.00 per share.

SEC source: 0001707461-25-000003 · wk-form4_1759351875.xml · derivative · entry 6

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,627

Underlying: Common Stock · 76,627 shares

Expires not disclosed

F5 · derivative.exercise_price: Each DSU represents a contingent right to receive one share of common stock of the Company.

F6 · derivative.exercise_date: Represents the aggregate amount of performance stock units ("PSUs") that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of PSU and restricted stock unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F6 · derivative.expiration_date: Represents the aggregate amount of performance stock units ("PSUs") that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of PSU and restricted stock unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0001707461-25-000003 · wk-form4_1759351875.xml · nonDerivative · entry 4

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,932

F4 · shares: Represents the aggregate amount of PSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0001707461-25-000003 · wk-form4_1759351875.xml · nonDerivative · entry 3

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 173,746

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 · shares: On September 30, 2025 the Compensation Committee of the Board of Directors of Ambac Financial Group approved the acceleration of the Reporting Person's 2023 and 2024 Performance Stock Unit awards in connection with the change of control referred to in footnote 1. The reporting person acquired shares of common stock of Ambac Financial Group, Inc. (the "Company") upon the simultaneous vesting and settlement of the reporting person's 2023 and 2024 Long Term Incentive Plan PSU awards.

SEC source: 0001707461-26-000002 · wk-form4a_1772574932.xml · derivative · entry 6

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,206

Underlying: Common Stock · 76,206 shares

Expires not disclosed

F5 · derivative.exercise_price: Each DSU represents a contingent right to receive one share of common stock of the Company.

F6 · derivative.exercise_date: Represents the aggregate amount of performance stock units ("PSUs") that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of PSU and restricted stock unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F6 · derivative.expiration_date: Represents the aggregate amount of performance stock units ("PSUs") that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of PSU and restricted stock unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0001707461-26-000002 · wk-form4a_1772574932.xml · nonDerivative · entry 4

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,162

F4 · shares: Represents the corrected aggregate amount of PSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0001707461-26-000002 · wk-form4a_1772574932.xml · nonDerivative · entry 3

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,397

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 · shares: On September 30, 2025 the Compensation Committee of the Board of Directors of Ambac Financial Group approved the acceleration of the Reporting Person's 2023 and 2024 Performance Stock Unit awards in connection with the change of control referred to in footnote 1. The reporting person acquired shares of common stock of Ambac Financial Group, Inc. (the "Company") upon the simultaneous vesting and settlement of the reporting person's 2023 and 2024 Long Term Incentive Plan PSU awards.

SEC source: 0001707461-25-000003 · wk-form4_1759351875.xml · derivative · entry 5

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 145,135 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.

F5 · derivative.exercise_price: Each DSU represents a contingent right to receive one share of common stock of the Company.

F1 · derivative.exercise_date: Upon the closing of the sale of Ambac Assurance Corporation by Ambac Financial Group to an entity owned by funds managed by Oaktree Capital Management, L.P., a change of control was triggered causing the Reporting Person's Deferred Share Units ("DSUs") to vest and settle.

F1 · derivative.expiration_date: Upon the closing of the sale of Ambac Assurance Corporation by Ambac Financial Group to an entity owned by funds managed by Oaktree Capital Management, L.P., a change of control was triggered causing the Reporting Person's Deferred Share Units ("DSUs") to vest and settle.

SEC source: 0001707461-25-000003 · wk-form4_1759351875.xml · nonDerivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,932

F2 · shares: Represents the amount of DSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0001707461-25-000003 · wk-form4_1759351875.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 219,842

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: Upon the closing of the sale of Ambac Assurance Corporation by Ambac Financial Group to an entity owned by funds managed by Oaktree Capital Management, L.P., a change of control was triggered causing the Reporting Person's Deferred Share Units ("DSUs") to vest and settle.

SEC source: 0001707461-26-000002 · wk-form4a_1772574932.xml · derivative · entry 5

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 145,135 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.

F5 · derivative.exercise_price: Each DSU represents a contingent right to receive one share of common stock of the Company.

F1 · derivative.exercise_date: Upon the closing of the sale of Ambac Assurance Corporation by Ambac Financial Group to an entity owned by funds managed by Oaktree Capital Management, L.P., a change of control was triggered causing the Reporting Person's Deferred Share Units ("DSUs") to vest and settle.

F1 · derivative.expiration_date: Upon the closing of the sale of Ambac Assurance Corporation by Ambac Financial Group to an entity owned by funds managed by Oaktree Capital Management, L.P., a change of control was triggered causing the Reporting Person's Deferred Share Units ("DSUs") to vest and settle.

SEC source: 0001707461-26-000002 · wk-form4a_1772574932.xml · nonDerivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,162

F2 · shares: Represents the corrected amount of DSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0001707461-26-000002 · wk-form4a_1772574932.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Group COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 219,842

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: Upon the closing of the sale of Ambac Assurance Corporation by Ambac Financial Group to an entity owned by funds managed by Oaktree Capital Management, L.P., a change of control was triggered causing the Reporting Person's Deferred Share Units ("DSUs") to vest and settle.

SEC source: 0000874501-25-000125 · wk-form4_1752092582.xml · derivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,767

Underlying: Common Stock · 35,307 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").

F2 · derivative.exercise_date: On July 9, 2025 the reporting person received a grant of 35,307 restricted stock units ("RSUs") as part of their 2025 Long Term Incentive Plan award. The RSUs will vest in three equal annual installments commencing July 9, 2026, July 9, 2027, and July 9, 2028.

F2 · derivative.expiration_date: On July 9, 2025 the reporting person received a grant of 35,307 restricted stock units ("RSUs") as part of their 2025 Long Term Incentive Plan award. The RSUs will vest in three equal annual installments commencing July 9, 2026, July 9, 2027, and July 9, 2028.

SEC source: 0000874501-25-000058 · wk-form4_1741984822.xml · derivative · entry 5

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,135

Underlying: Common Stock · 4,961 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.

F6 · derivative.exercise_price: Each DSU represents a contingent right to receive one share of common stock of the Company.

F4 · derivative.exercise_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of deferred share units ("DSUs") pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F4 · derivative.expiration_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of deferred share units ("DSUs") pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0000874501-25-000058 · wk-form4_1741984822.xml · derivative · entry 4

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,460

Underlying: Common Stock · 238 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 common stock of the Company.

F5 · derivative.exercise_date: Represents the aggregate amount of RSUs that were converted into shares of common stock of the Company upon settlement of a portion of the reporting person's 2024 Long Term Incentive Plan award.

F5 · derivative.expiration_date: Represents the aggregate amount of RSUs that were converted into shares of common stock of the Company upon settlement of a portion of the reporting person's 2024 Long Term Incentive Plan award.

SEC source: 0000874501-25-000058 · wk-form4_1741984822.xml · derivative · entry 3

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,698

Underlying: Common Stock · 4,961 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 common stock of the Company.

F4 · derivative.exercise_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of deferred share units ("DSUs") pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F4 · derivative.expiration_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of deferred share units ("DSUs") pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0000874501-25-000058 · wk-form4_1741984822.xml · nonDerivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,707

F2 · shares: Represents the amount of RSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0000874501-25-000058 · wk-form4_1741984822.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,945

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: The reporting person acquired 238 shares of common stock of Ambac Financial Group, Inc. (the "Company") upon the vesting and settlement of a portion of the reporting person's 2024 Restrictive Stock Unit Long Term Incentive Plan ("2024 RSU LTIP") award.

SEC source: 0000874501-25-000034 · wk-form4_1741637697.xml · derivative · entry 3

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,174

Underlying: Common Stock · 59,408 shares

Expires not disclosed

F3 · security: Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.

F3 · derivative.exercise_price: Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.

F4 · shares: Represents the aggregate amount of performance stock units ("PSUs") that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of PSU and restricted stock unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F4 · derivative.exercise_date: Represents the aggregate amount of performance stock units ("PSUs") that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of PSU and restricted stock unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F4 · derivative.expiration_date: Represents the aggregate amount of performance stock units ("PSUs") that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of PSU and restricted stock unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0000874501-25-000034 · wk-form4_1741637697.xml · nonDerivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,707

F2 · shares: As part of the vesting and settlement of a portion of the 2022 LTIP award, 2,154 shares of common stock were withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0000874501-25-000034 · wk-form4_1741637697.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,861

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: The reporting person acquired 2,154 shares of common stock of Ambac Financial Group, Inc. (the "Company") upon the simultaneous vesting and settlement of a portion of the reporting person's 2022 Long Term Incentive Plan award, which had a three year performance period and vested on March 6, 2025.

SEC source: 0000874501-25-000027 · wk-form4_1741130865.xml · derivative · entry 8

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,766

Underlying: Common Stock · 4,529 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.

F4 · derivative.exercise_price: Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.

F4 · price: Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.

F5 · derivative.exercise_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F5 · derivative.expiration_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0000874501-25-000027 · wk-form4_1741130865.xml · derivative · entry 7

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,659

Underlying: Common Stock · 5,061 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 restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").

F1 · price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").

F6 · derivative.exercise_date: Represents the amount of RSUs that were converted into shares of common stock of the Company upon settlement of a portion of the reporting person's 2023 Long Term Incentive Plan award.

F6 · derivative.expiration_date: Represents the amount of RSUs that were converted into shares of common stock of the Company upon settlement of a portion of the reporting person's 2023 Long Term Incentive Plan award.

SEC source: 0000874501-25-000027 · wk-form4_1741130865.xml · nonDerivative · entry 4

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,707

SEC source: 0000874501-25-000027 · wk-form4_1741130865.xml · nonDerivative · entry 3

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,239

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 restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").

SEC source: 0000874501-25-000027 · wk-form4_1741130865.xml · derivative · entry 6

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,237

Underlying: Common Stock · 4,915 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.

F4 · derivative.exercise_price: Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.

F4 · price: Each deferred share unit ("DSU") represents a contingent right to receive one share of common stock of the Company.

F5 · derivative.exercise_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F5 · derivative.expiration_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0000874501-25-000027 · wk-form4_1741130865.xml · derivative · entry 5

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,720

Underlying: Common Stock · 5,556 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 restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").

F1 · price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").

F3 · derivative.exercise_date: Represents the amount of RSUs that vested upon settlement of a portion of the reporting person's 2022 Long Term Incentive Plan award.

F3 · derivative.expiration_date: Represents the amount of RSUs that vested upon settlement of a portion of the reporting person's 2022 Long Term Incentive Plan award.

SEC source: 0000874501-25-000027 · wk-form4_1741130865.xml · nonDerivative · entry 2

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,707

F2 · date: Represents the amount of RSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

SEC source: 0000874501-25-000027 · wk-form4_1741130865.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,348

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 · date: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").

F1 · price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").

SEC source: 0000874501-24-000193 · wk-form4_1723149845.xml · nonDerivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,707

SEC source: 0000874501-24-000097 · wk-form4_1710533412.xml · derivative · entry 1

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,276

Underlying: Common Stock · 15,597 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the common stock of Ambac Financial Group, Inc. (the "Company").

F2 · derivative.exercise_date: On March 13, 2024 the reporting person received a grant of 15,597 RSUs as part of their 2024 Long Term Incentive Plan award. The RSUs will vest in three equal annual installments commencing March 13, 2025, March 3, 2026, and March 3, 2027.

F2 · derivative.expiration_date: On March 13, 2024 the reporting person received a grant of 15,597 RSUs as part of their 2024 Long Term Incentive Plan award. The RSUs will vest in three equal annual installments commencing March 13, 2025, March 3, 2026, and March 3, 2027.

SEC source: 0000874501-24-000079 · wk-form4_1710188081.xml · derivative · entry 5

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,322

Underlying: Common Stock · 6,356 shares

Expires not disclosed

F6 · derivative.exercise_price: Each DSU represents a contingent right to receive one share of common stock of the Company.

F5 · derivative.exercise_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of deferred share units ("DSUs") pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F5 · derivative.expiration_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of deferred share units ("DSUs") pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

SEC source: 0000874501-24-000079 · wk-form4_1710188081.xml · derivative · entry 4

Smith R Sharon · CIK 0001707461 · Exec VP & Chief Strategy Offr

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,679

Underlying: Common Stock · 6,356 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 restricted stock unit ("RSUs") represents a contingent right to receive one share of the common stock of the Company.

F5 · derivative.exercise_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of deferred share units ("DSUs") pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

F5 · derivative.expiration_date: Represents the aggregate amount of RSUs that were converted into an equivalent number of deferred share units ("DSUs") pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.