CX 6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 or 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the monthof March 2025

Commission File Number: 001-14946

Cemex, S.A.B. de C.V.

(Translation of Registrant’s name into English)

AvenidaRicardo Margáin Zozaya #325, Colonia Valle del Campestre,

San Pedro Garza García, Nuevo León 66265,México

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒   Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Contents

On March 25, 2025, Cemex, S.A.B. de C.V. (NYSE: CX) (“Cemex” or the “Company”) informed the Mexican Stock Exchange (Bolsa Mexicanade Valores) that, at Cemex’s Ordinary General Shareholders’ Meeting held on March 25, 2025, members of Cemex’s Board of Directors, as well as members of Cemex’s Board of Directors’ Audit, Corporate Practices and Finance, and Sustainability, Climate Action, Social Impact, and Diversity Committees, were elected as follows:

BOARD OF DIRECTORS

Rogelio Zambrano Lozano, Roger Saldaña Madero, and Guillermo Francisco Hernández Morales were elected, respectively, as Executive Chairman, Secretary, and Alternate Secretary of Cemex’s Board of Directors, the latter two not being members of Cemex’s Board of Directors.

AUDIT COMITTEE

CORPORATE PRACTICES AND FINANCE COMMITTEE

SUSTAINABILITY, CLIMATE ACTION, SOCIAL IMPACT, AND DIVERSITY COMMITTEE

Ramiro Gerardo Villarreal Morales, Francisco Javier Fernández Carbajal, and Armando J. García Segovia were appointed as Presidents of the Audit Committee, Corporate Practices and Finance Committee, and Sustainability, Climate Action, Social Impact, and Diversity Committee of Cemex’s Board of Directors, respectively. The Secretary and Alternate Secretary of Cemex’s Board of Directors will act as Secretary and Alternate Secretary of the Audit Committee, Corporate Practices and Finance Committee, and Sustainability, Climate Action, Social Impact, and Diversity Committee of Cemex’s Board of Directors, without forming part of the aforementioned Committees.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, Cemex, S.A.B. de C.V. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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