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 December, 2019

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

CEMEX, S.A.B. de C.V. (“CEMEX”) (NYSE: CX) announced today that, in compliance with the resolutions approved at CEMEX’s General Ordinary Shareholders’ Meeting held on March 28, 2019, it will proceed to make payment of the second, and final, installment (U.S.$75 million) of the cash dividend at the rate of $0.031517 Mexican pesos per share (equivalent to U.S.$0.001654 per share), against the delivery of coupon 150 (one hundred and fifty) adhered to the share certificates representing all of the outstanding shares that integrate the capital stock of CEMEX. CEMEX CPO holders will receive a cash dividend of $0.094551 Mexican pesos per CPO (equivalent to U.S.$0.004962 per CPO) and CEMEX ADS holders will receive a cash dividend of U.S.$0.049620 per ADS. The second, and final, installment of the cash dividend will be paid to CPO holders on or around December 17, 2019 in Mexican Pesos. ADS holders are expected to receive the second, and final, installment of the dividend on or around December 18, 2019.

The declared dividend comes from the Net Tax Profit Account (Cuenta de Utilidad Fiscal Neta or CUFIN) of CEMEX generated until December 31, 2013, therefore no withholding tax will be generated for the payment of this dividend. Furthermore, dividend payments to non-residents of Mexico will not be subject to withholding tax in Mexico.

The cash dividend to CPO holders to be paid on or around December 17, 2019 in Mexican Pesos was determined applying an exchange rate of $19.0455 Mexican pesos per U.S. dollar as determined by Banco de México on December 13, 2019.

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.