X0306 4 2022-08-09 0 0001850119 Century Therapeutics, Inc. IPSC 0001687880 Versant Venture Capital VI, L.P. ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 0001777654 Versant Ventures VI GP, L.P. ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 0001777652 Versant Ventures VI GP-GP, LLC ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 0001832235 Versant Vantage II, L.P. ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 0001839790 Versant Vantage II GP, L.P. ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 0001839789 Versant Vantage II GP-GP, LLC ONE SANSOME STREET SUITE 3630 SAN FRANCISCO CA 94104 0 0 1 0 Common Stock 2022-08-09 4 S 0 550000 13.0302 D 11816814 D Common Stock 2022-08-09 4 J 0 364800 0.00 D 11452014 D Common Stock 714095 I See Footnote The sale of these shares was effected pursuant to a Rule 10b5-1 trading plan adopted by Versant Venture Capital VI, L.P. ("Versant VI"). The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $13.03 to $13.26, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote (2) to this Form 4. The reportable securities are owned directly by Versant VI. Versant Ventures VI GP, L.P. ("Versant Ventures VI GP") is the general partner of Versant VI, and Versant Ventures VI GP-GP, LLC ("Versant Ventures VI GP-GP") is the general partner of Versant Ventures VI GP. Each of Versant Ventures VI GP and Versant Ventures VI GP-GP may be deemed to indirectly beneficially own the shares beneficially owned by Versant VI, but disclaim beneficial ownership except to the extent of their pecuniary interest therein. Represents a pro-rata distribution, and not a purchase or sale, without additional consideration by Versant VI to its limited partners pursuant to a Rule 10b5-1 trading plan. The reportable securities are owned by Versant Vantage II, L.P. ("Versant Vantage II''). Versant Vantage II GP, L.P. ("Versant Vantage II GP") is the general partner of Versant Vantage II, and Versant Vantage II GP-GP, LLC ("Versant Vantage II GP-GP") is the general partner of Versant Vantage II GP. Each of Versant Vantage II GP and Versant Vantage II GP-GP may be deemed to indirectly beneficially own the shares beneficially owned by Versant Vantage II, but disclaim beneficial ownership except to the extent of their pecuniary interest therein. By: /s/ Versant Venture Capital VI, L.P. By: Versant Ventures VI GP, L.P. Its: General Partner By: Versant Ventures VI GP-GP, LLC Its: General Partner By: Max Eisenberg Its: Chief Operating Officer 2022-08-11 By: /s/ Versant Ventures VI GP, L.P. By: Versant Ventures VI GP-GP, LLC Its: General Partner By: Max Eisenberg Its: Chief Operating Officer 2022-08-11 By: /s/ Versant Ventures VI GP-GP, LLC By: Max Eisenberg Its: Chief Operating Officer 2022-08-11 By: /s/ Versant Vantage II, L.P. By: Versant Vantage II GP, L.P. Its: General Partner By: Versant Vantage II GP-GP, LLC Its: General Partner By: Max Eisenberg Its: Chief Operating Officer 2022-08-11 By: /s/ Versant Vantage II GP, L.P. By: Versant Vantage II GP-GP, LLC Its: General Partner By: Max Eisenberg Its: Chief Operating Officer 2022-08-11 By: /s/ Versant Vantage II GP-GP, LLC By: Max Eisenberg Its: Chief Operating Officer 2022-08-11