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 month of March 2026

Commission File Number: 001-14946

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

(Translation of Registrant’s name into English)

Avenida Ricardo 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 26, 2026, Cemex, S.A.B. de C.V. (NYSE: CX) (“Cemex” or the “Company”) informed the Mexican Stock Exchange (Bolsa Mexicana de Valores) and the Mexican National Banking and Securities Commission (Comisión Nacional Bancaria y de Valores) that, at Cemex’s Ordinary General Shareholders’ Meeting held on March 26, 2026 (the “Shareholders’ Meeting”), among other matters, the following was resolved by majority:

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

RAMIRO GERARDO VILLARREAL MORALES

GABRIEL JARAMILLO SANINT

MARÍA DE LOURDES MELGAR PALACIOS

CORPORATE PRACTICES AND FINANCE COMMITTEE

ISAURO ALFARO ALVAREZ

FRANCISCO JAVIER FERNÁNDEZ CARBAJAL

EVERARDO ELIZONDO ALMAGUER

SUSTAINABILITY, CLIMATE ACTION, SOCIAL IMPACT, AND DIVERSITY COMMITTEE

ISABEL MARÍA AGUILERA NAVARRO

ARMANDO J. GARCÍA SEGOVIA

MARCELO ZAMBRANO LOZANO

JULISSA REYNOSO PANTALEÓN

Ramiro Gerardo Villareal Morales, Isauro Alfaro Alvarez and Isabel María Aguilera Navarro, were appointed as Chairs 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.

(amounts in constant millions of Mexican pesos as of December 31, 2025)

The allocation of profits includes the declaration of a cash dividend of USD $180,000,000.00 (one hundred eighty million dollars 00/100), payable in USD to the holders of American Depositary Shares (“ADS”) and in Mexican pesos at the exchange rate determined by Mexico’s central bank (Banco de México) two business days prior to each payment date to holders of Series A and Series B shares and Ordinary Participation Certificates (“CPO”) of Cemex. The dividend will be paid in four equal installments in USD for all outstanding shares on each payment date. The first installment should be paid starting on June 18, 2026 for coupon 159; the second installment should be paid starting on September 17, 2026 for coupon 160; the third installment should be paid starting on December 16, 2026 for coupon 161; and the fourth and last installment should be paid starting on March 3, 2027 for coupon 162.

Cemex’s Board of Directors is authorized to (i) set the basis on which the purchase and, where appropriate, the sale of said shares or securities representing them would be instructed; (ii) designate the persons authorized to make the decision to acquire or sell them; and (iii) designate those responsible for carrying out the transactions and giving the corresponding notices to the authorities. Cemex’s Board of Directors and/or the representatives or delegates designated from time to time, or the persons responsible for said transactions, will determine in each case whether the purchase is made using stockholders’ equity as long as the shares or securities representing them are owned by Cemex, or, using the share capital, in case it is decided to convert them into unsubscribed shares to be kept in treasury.

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.