Amendments to Bylaws (Form 8-K)

As further described under Item 5.07 of this Current Report on this Form 8-K, at the 2026 Annual Meeting of Stockholders (the "Annual Meeting"), and upon the recommendation of the Board of Directors (the "Board"), the stockholders of Century Therapeutics, Inc. (the "Company") approved a Certificate of Amendment to the Company's Second Amended and Restated Certificate of Incorporation, as amended, to increase the number of authorized shares of common stock, par value $0.0001 per share ("Common Stock", and such amendment, the "Authorized Shares Amendment"). The Authorized Shares Amendment was previously approved by the Board, subject to stockholder approval.

The Authorized Shares Amendment was filed with the Secretary of State of the State of Delaware on June 11, 2026. The Authorized Shares Amendment became effective on June 12, 2026.

The foregoing description of the Authorized Shares Amendment does not purport to be complete and is qualified in its entirety by reference to the full text of the Certificate of Amendment, a copy of which is filed as Exhibit 3.1 to this Form 8-K and incorporated herein by reference.