GigCapital9(GIXXU) - Prospectus(update)

Table of Contents As filed with the U.S. Securities and Exchange Commission on January 21, 2026 Registration No. 333-291869 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT No. 1 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 GigCapital9 Corp. (Exact name of registrant as specified in its charter) Cayman Islands 6770 98-1894186 (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) (I.R.S. ...