AMBAC Financial Group Inc. Restricted Stock Units Grant to Chief Accounting Officer

On March 10, 2025, Cristina E. Ahn, the Chief Accounting Officer of AMBAC Financial Group Inc., received a grant of 2,486 restricted stock units (RSUs) as part of the 2025 Long Term Incentive Plan award. The RSUs will vest in three equal annual installments commencing on March 10, 2026, March 3, 2027, and March 3, 2028. The RSUs are tied to the company's common stock and have a conversion or exercise price of $0. This filing, submitted on September 30, 2025, provides details of the grant and the vesting schedule.