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SCHEDULE 13D/A 0001250975 XXXXXXXX LIVE 1 Class A Ordinary Shares, $0.0001 par value 10/06/2025 false 0002034268 G1828A108 Cantor Equity Partners III, Inc. 110 East 59th Street New York NY 10022 Brandon Lutnick 212-938-5000 Cantor EP Holdings III, LLC 110 East 59th Street New York NY 10022 0001250975 N LUTNICK HOWARD W AF N X1 0.00 0.00 0.00 0.00 0.00 N 0.0 IN Class A Ordinary Shares, $0.0001 par value Cantor Equity Partners III, Inc. 110 East 59th Street New York NY 10022 This Amendment No. 1B (this "Amendment") amends and supplements the Schedule 13D filed with the United States Securities and Exchange Commission (the "SEC") on July 1, 2025 (the "Original Schedule 13D") by Cantor EP Holdings III, LLC, a Delaware limited liability company (the "Sponsor"), Cantor Fitzgerald, L.P., a Delaware limited partnership ("Cantor"), CF Group Management, Inc., a New York corporation ("CFGM") and Howard W. Lutnick, and Amendment No. 1A to the Original Schedule 13D, dated October 6, 2025, filed by the Sponsor, Cantor, CFGM and Brandon G. Lutnick, relating to their beneficial ownership of Class A ordinary shares, par value $0.0001 per share, of the Issuer ("Class A Ordinary Shares") and Class B ordinary shares, par value $0.0001 per share, of the Issuer ("Class B Ordinary Shares" and, together with the Class A Ordinary Shares, the "Ordinary Shares"). Capitalized terms used but not defined in this Amendment have the respective meanings set forth in the Original Schedule 13D. This Amendment No. 1B is being filed solely by Howard W. Lutnick to indicate that he no longer has any voting or dispositive power of the securities of the Issuer and therefore shall cease to be a Reporting Person. Item 4 is hereby amended and supplemented with the following: Completion of Howard W. Lutnick Divestiture In accordance with the transactions described in the Original Schedule 13D, Mr. Howard W. Lutnick, the U.S. Secretary of Commerce, has completed his previously announced divestiture of his holdings in Cantor and CFGM in connection with his appointment as the U.S. Secretary of Commerce. The sale of such interests was completed on October 6, 2025, and as a result, Mr. Howard W. Lutnick no longer has any voting or dispositive power over any of the securities of the Issuer and is filing this Amendment as a final amendment to reflect his zero ownership. Item 5(a) is hereby amended and restated as follows: As of October 6, 2025, Mr. Howard Lutnick does not beneficially own any Ordinary Shares. Number of Ordinary Shares beneficially owned as to which Howard W. Lutnick has: (i) sole power to vote or direct the vote: 0 (ii) shared power to vote or direct the vote: 0 (iii) sole power to dispose or to direct the disposition: 0 (iv) shared power to dispose of or to direct the disposition: 0 See Item 4 of this Amendment, of the Original Schedule 13D and of Amendment No. 1A, which are each incorporated by reference herein. Not applicable. As of October 6, 2025, Mr. Howard W. Lutnick ceased to be a beneficial owner of more than 5% of the outstanding Ordinary Shares. LUTNICK HOWARD W /s/ Howard W. Lutnick Howard W. Lutnick 10/06/2025