As filed with the Securities and Exchange Commission on January 26, 2026 Registration No. 333-292822 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 Clear Street Group Inc. (Exact Name of Registrant as Specified in Its Charter) (State or Other Jurisdiction of Incorporation or Organization) Delaware 6211 86-2376416 (Primary Standard Industrial Classification Code Number) 150 Greenwich Street, 45th Floo ...