Table of Contents As filed with the U.S. Securities and Exchange Commission on September 23, 2025. Registration No. 333-279379 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 4 to Form F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 (Translation of Registrant's name into English) United Mexican States (State or other jurisdiction of incorporation or organization) 4512 (Primary Standard Industrial Classification Code Number) Avenida Paseo de la Reforma 243, 2 ...