As filed with the U.S. Securities and Exchange Commission on February 23, 2024. Registration No. 333-276857 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 AMENDMENT NO.1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 BLACK HAWK ACQUISITION CORPORATION (Exact name of registrant as specified in its charter) Cayman Islands 6770 N/A (State or Other Jurisdiction of Incorporation or Organization) (Primary Standard Industrial (I.R.S. Employer Identification Number) 4125 B ...