As filed with the U.S. Securities and Exchange Commission on April 18, 2025. No. 333-285974 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 Perimeter Acquisition Corp. I (Exact name of registrant as specified in its charter) Cayman Islands 6770 98-1843886 (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial (I.R.S. Employer Identification No.) 6060 N. Central Exp ...

As filed with the U.S. Securities and Exchange Commission on March 20, 2025. No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Perimeter Acquisition Corp. I (Exact name of registrant as specified in its charter) Cayman Islands 6770 98-1843886 (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Classification Code Number) Copies to: Daniel L. Forman Lowenstein Sandler LLP 12 ...