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 July, 2021

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

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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EXHIBIT INDEX

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Exhibit 1

Stock Listing Information Bolsa de Valores de Colombia S.A. (Colombian Stock Exchange) Ticker: CLH Investor Relations Pablo Gutierrez +57 (1) 603-9051 E-mail: pabloantonio.gutierrez@cemex.com

FORWARD LOOKING INFORMATION

This report contains forward-looking statements. In some cases, these statements can be identified by the use of forward-looking words such as “may,” “assume,” “might,” “should,” “could,” “continue,” “would,” “can,” “consider,” “anticipate,” “estimate,” “expect,” “envision,” “plan,” “believe,” “foresee,” “predict,” “potential” “target,” “strategy,” and “intend” or other similar words. These forward-looking statements reflect CEMEX Latam Holdings, S.A.’s (“CLH”) current expectations and projections about future events based on CLH’s knowledge of present facts and circumstances and assumptions about future events, as well as CLH’s current plants based on such facts and circumstances. These statements necessarily involve risks and uncertainties that could cause actual results to differ materially from CLH’s expectations. Some of the risks, uncertainties and other important factors that could cause results to differ, or that otherwise could have an impact on CLH or its subsidiaries (together, the “CLH Group”), include, but are not limited to, the cyclical activity of the construction sector; the CLH Group’s exposure to other sectors that impact the CLH Group’s business, such as, but not limited to, the energy sector; competition in the markets in which the CLH Group offers its products and services; availability of raw materials and related fluctuating prices; general political, social, economic, health and business conditions in the markets in which the CLH Group operates or that affect its operations and any significant economic, health, political or social developments in those markets, including any nationalization or privatization of any assets or operations; the regulatory environment, including environmental, tax, antitrust and acquisition-related rules and regulations; the CLH Group’s ability to satisfy its debt obligations and the ability of CEMEX, S.A.B. de C.V. (“CEMEX”), the ultimate parent company of the major shareholder of CLH, to satisfy CEMEX’s obligations under its material debt agreements, the indentures that govern CEMEX’s senior secured notes and CEMEX’s other debt instruments; the CLH Group’s and CEMEX’s ability to refinance their existing indebtedness; availability of short-term credit lines, which can assist the CLH Group in connection with market cycles; the impact of CEMEX’s below investment grade debt rating on the CLH Group’s and CEMEX’s cost of capital; loss of reputation of the CLH Group’s brands; the CLH Group’s and CEMEX’s ability to consummate asset sales and fully integrate newly acquired businesses; achieve cost-savings from the CLH Group’s cost-reduction initiatives and implement the CLH Group’s pricing initiatives for the CLH Group’s products; the increasing reliance on information technology infrastructure for the CLH Group’s operations, sales in general, sales invoicing, procurement, financial statements and other processes that can adversely affect operations in the event that the infrastructure does not work as intended, experiences technical difficulties or is subject to cyber-attacks; changes in the economy that affect demand for consumer goods, consequently affecting demand for the CLH Group’s products and services; the impact of pandemics, epidemics or outbreaks of infectious diseases and the response of governments and other third parties, including with respect to COVID-19, which have affected and may continue to adversely affect, among other matters, supply chains, international operations, availability of liquidity, investor confidence and consumer spending, as well as availability of, and demand for, the CLH Group’s products and services; weather conditions, including but not limited to, excessive rain and snow, and disasters such as earthquakes and floods; trade barriers, including tariffs or import taxes and changes in existing trade policies or changes to, or withdrawals from free trade agreements; terrorist and organized criminal activities as well as geopolitical events; declarations of insolvency or bankruptcy or becoming subject to similar proceedings; natural disasters and other unforeseen events (including global health hazards such as COVID-19); and the other risks and uncertainties described in CLH’s public filings. Readers are urged to read this document and carefully consider the risks, uncertainties and other factors that affect the CLH Group’s business. The information contained in this report is subject to change without notice, and CLH is not obligated to publicly update or revise forward-looking statements. Unless the context indicates otherwise, all references to pricing initiatives, price increases or decreases, refer to the CLH Group’s prices for the CLH Group’s products.

CEMEX Latam Holdings, S.A. and subsidiaries Copyright.

OPERATING AND FINANCIAL HIGHLIGHTS

Cement and aggregates volumes in thousands of metric tons. Ready-mix volumes in thousands of cubic meters.

In millions of US dollars, except volumes, percentages, employees, and per-share amounts.

Shares outstanding are presented in millions.

OPERATING RESULTS

Colombia

In millions of US dollars, except percentages.

Year-over-year percentage variation.

In Colombia, the growth momentum observed in industry cement volumes year-to-date April was interrupted by the social protests, mainly during May. We estimate industry activity returned to first quarter levels in June, as the road blockades and protests gradually eased. The housing and infrastructure sectors continued driving demand in the country.

We believe the outlook for cement volumes remains favorable, supported by the resilience of the self-construction sector, record home sales, the execution of the existing 4G highway projects, as well as the rollout of new infrastructure programs.

Panama

In millions of US dollars, except percentages.

Year-over-year percentage variation.

In Panama, our cement, ready-mix and aggregates volumes showed strong growth during the quarter due to an easy base of comparison in the same period of 2020, which was impacted by COVID-19 restrictions. However, industry cement volumes during the quarter remained weak, below those of 2019.

During the quarter, we continued selling domestic clinker and exporting cement and clinker, improving our capacity utilization in the country and balancing shortages in nearby markets. Please note that domestic clinker sales and exports are not included in the table above which refers to volume and price variations of “Domestic gray cement”.

OPERATING RESULTS

Costa Rica

In millions of US dollars, except percentages.

Year-over-year percentage variation.

In Costa Rica, our cement volumes during the second quarter increased by 16% on a year-over-year basis. The positive volume trend in the industry continued during the quarter, mainly driven by the infrastructure and housing sectors. Our quarterly cement prices improved by 4% year-over-year and by 2% sequentially, in local currency terms.

During the quarter, we continued selling domestic clinker and exporting cement, improving our capacity utilization in Costa Rica and balancing shortages in nearby markets. Please note that domestic clinker sales and exports are not included in the table above which refers to volume and price variations of “Domestic gray cement”.

Rest of CLH

In millions of US dollars, except percentages.

Year-over-year percentage variation.

In the Rest of CLH region, our cement volumes during the quarter improved by 25% year-over-year and 9% sequentially, reaching record levels. Cement volumes during the quarter increased year-over-year in Nicaragua, Guatemala, and El Salvador. Increased remittances supported cement consumption across the region.

In Guatemala, our cement volumes were driven mainly by strong activity in the self-construction sector—segment where we have a higher relative presence—and by a gradual recovery in the formal sector. Our cement prices improved by 2% year- over-year and 1% sequentially, in local-currency terms.

In Nicaragua, our cement volumes were driven mainly by the self-construction sector and by government-sponsored projects. Going forward, socio-political risk in the country could increase due to the presidential elections scheduled for this November.

OPERATING EBITDA, FREE CASH FLOW AND DEBT RELATED INFORMATION

Operating EBITDA and free cash flow

In millions of US dollars, except percentages.

Our free cash flow reached US$38 million year-to-date June, 39% higher on a year-over-year basis. The improvement was mainly driven by higher EBITDA, as well as lower financial expense and working capital investment. Our financial expense declined by US$5.2 million year-to-date June on a year-over-year basis.

During 2Q20, the taxes-paid line benefited from tax refunds in Colombia for US$16 million.

Information on Debt

In millions of US dollars, except percentages.

Reduced Net Debt by US$94 million from June 2020 to June 2021. Net-debt-to-EBITDA ratio improved to 3.0x in June 2021, from 4.1x in June 2020, due to higher EBITDA and lower debt.

GUIDANCE 2021

Guidance Full Year 2021¹

In millions of US dollars, except percentages.

We are guiding to a Strategic CAPEX of US$40 million for 2021. US$28 million is related to the development of our overall Maceo cement plant project in Colombia.

OPERATING RESULTS

Income statement & balance sheet

CEMEX Latam Holdings, S.A. and Subsidiaries

in thousands of U.S. Dollars, except per share amounts

OPERATING RESULTS

Income statement & balance sheet

CEMEX Latam Holdings, S.A. and Subsidiaries

in millions of Colombian Pesos in nominal terms, except per share amounts

OPERATING RESULTS

Operating Summary per Country

in thousands of U.S. dollars

Operating EBITDA margin as a percentage of net sales