Management Change/Compensation (Form 8-K)

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On December 29, 2025, Robert Kadlec, MD, resigned from the Board of Directors of MiNK Therapeutics, Inc. (the "Company"), including all committees thereof, effective December 29, 2025, in connection with his acceptance of a senior public service role within the United States government as Assistant Secretary of War for Nuclear Deterrence and Chemical and Biological Defense Policy and Programs.

Dr. Kadlec joined the Company's Board in October 2024 and contributed valuable perspective informed by his extensive experience in medicine, public health preparedness, and national service. His resignation is associated with his acceptance of a senior public service role of significant responsibility and distinction, consistent with his long-standing commitment to service. The Company congratulates Dr. Kadlec on this appointment and expresses its sincere appreciation for his engagement, perspective, and counsel during his time on the Board.