As filed with the U.S. Securities and Exchange Commission on August 25, 2025 Registration No. 333-[●] UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 CALLAN JMB INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Nevada 7389 99-0931141 (I.R.S. Employer Identification Number) 244 Flightline Drive Spring Branch, Texas 78070 ...