X0508 4 2025-11-20 0001850119 Century Therapeutics, Inc. IPSC 0002039294 Cowan Chad C/O CENTURY THERAPEUTICS, INC. 25 N 38TH STREET, 11TH FLOOR PHILADELPHIA PA 19104 false true false false Chief Scientific Officer 0 Common Stock 2025-11-20 4 S 0 5462 0.501 D 987027 D Common Stock 10697 I By Trust The sales reported on this Form 4 represent the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. Such sales were automatic and not at the discretion of the Reporting Person. Shares held by the Cowan Investment Nominee Trust. The Reporting Person disclaims beneficial ownership except to the extent of any pecuniary interest therein, and this report shall not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose. /s/ Douglas Carr, Attorney-in-Fact 2025-11-24