AMENDMENT NO.1 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 FG Imperii Acquisition Corp. As filed with the U.S. Securities and Exchange Commission on December 30, 2025 Registration No. 333- 290873 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Copies to: Mitchell S. Nussbaum Giovanni Caruso Terry Bokosha Loeb & Loeb LLP 345 Park Avenue New York, New York 10154 Tel: (212) 407-4000 Brad L. Shiffman Blank Rome LLP 1271 Avenue of the Americas New York, New York 10 ...

Table of Contents As filed with the U.S. Securities and Exchange Commission on October 14, 2025 Registration No. 333-[ ] | | | (State or other jurisdiction of (Primary Standard Industrial (I.R.S. Employer incorporation or organization) Classification Code Number) Identification Number) 104 S. Walnut Street, Unit 1A Itasca, Illinois 60143 Tel: (847) 791-6817 (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) UNITED STATES SECURITIES AND EXCHA ...