As filed with the U.S. Securities and Exchange Commission on September 19, 2025 Registration No. 333- 289849 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 (Primary Standard Industrial Classification Code Number) Nevada 7389 99-0931141 (I.R.S. Employer Identification Number) 244 Flightline Drive Spring Branch, Texas 78070-6241 (830) 438-0395 CALLAN JMB INC. (Exact name of registrant as specified in i ...