As filed with the U.S. Securities and Exchange Commission on December 22, 2025 Registration No. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ____________________________ ESTRELLA IMMUNOPHARMA, INC. (Exact Name of Registrant as Specified in its Charter) ____________________________ (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) Delaware 6770 86-1 ...

As filed with the U.S. Securities and Exchange Commission on December 22, 2025 Registration No. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ____________________________ ESTRELLA IMMUNOPHARMA, INC. (Exact Name of Registrant as Specified in its Charter) ____________________________ (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) Delaware 6770 86-1 ...

As filed with the U.S. Securities and Exchange Commission on December 15, 2023 Registration No. 333-274931 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 2 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ––––––––––––––––––––––––––––– ESTRELLA IMMUNOPHARMA, INC. (Exact Name of Registrant as Specified in its Charter) _____________________________ | Delaware | 6770 | 86-1314502 | | --- | --- | --- | | (State or other jurisdiction of | (Primary Standard ...