As filed with the Securities and Exchange Commission on May 13, 2024 Registration No. 333-277115 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 2 TO FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 AETERNA ZENTARIS INC. (Exact name of Registrant as specified in its charter) Not Applicable (Translation of Registrant's name into English) (Address, including zip code, and telephone number, including area code, of Registrant's principal executive offices) K ...

As filed with the Securities and Exchange Commission on April 29, 2024 Registration No. 333-277115 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 1 TO FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 AETERNA ZENTARIS INC. (Exact name of Registrant as specified in its charter) Not Applicable (Translation of Registrant's name into English) (State or other jurisdiction of incorporation or organization) Canada 2834 Not Applicable (Primary Standard Industria ...

FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 AETERNA ZENTARIS INC. As filed with the Securities and Exchange Commission on February 15, 2024 Registration No. 333-___________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Exact name of Registrant as specified in its charter) Not Applicable (Translation of Registrant's name into English) (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) Canada 2 ...