As filed with the Securities and Exchange Commission on February 4, 2026 Registration No. 333-292822 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 2 to FORM S-1 REGISTRATION STATEMENT Table of Contents UNDER THE SECURITIES ACT OF 1933 Clear Street Group Inc. (Exact Name of Registrant as Specified in Its Charter) Delaware 6211 86-2376416 (State or Other Jurisdiction of Incorporation or Organization) (Primary Standard Industrial Classification Code Number) (I.R.S. Emplo ...

(State or Other Jurisdiction of Incorporation or Organization) 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) Delaware 6211 86-2376416 (Primary Standard Industrial Classification Code Number) 150 Greenwich Street, 45th Floo ...

Table of Contents As filed with the Securities and Exchange Commission on January 20, 2026 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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) (Primary Standard Industrial Classification Code Number) Delaware 6211 86-2376416 (I.R.S. Employer Identification Number) 150 Greenwich Street ...