Gerdau S.A. (NYSE: GGB) furnishes 3Q25 results, dividends notice in Form 6-K

Rhea-AI Filing Summary

Gerdau S.A. submitted a foreign issuer report that makes several October communications available to investors. The filing bundles a material fact dated October 30, a notice to shareholders about dividend payment, the company’s 3Q25 results presentation, and a 3Q25 earnings release.

This report does not introduce new terms itself but formally furnishes these four documents to the market under U.S. disclosure rules.

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Form 6-K: How Foreign Companies Report to the SEC →

U.S. 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

Dated October 31, 2025

Commission File Number 1-14878

GERDAU S.A.

(Translation of Registrant’s Name into English)

Av. Dra. Ruth Cardoso, 8,501 – 8° andar

São Paulo, São Paulo - Brazil CEP 05425-070

(Address of principal executive offices)

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

Form 20-F x          Form 40-F ¨

Exhibit Index

Exhibit	Description of Exhibit
99.1	Material Fact, October 30, 2025
99.2	Notice to Shareholders—Payment of Dividends, October 30, 2025
99.3	3Q25 Results Gerdau S.A.,October 30, 2025
99.4	3Q25 Earnings Release, October 31, 2025

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: October 31, 2025

	GERDAU S.A.
	By:	/s/ Rafael Dorneles Japur
	Name:	Rafael Dorneles Japur
	Title:	Executive Vice President Investor Relations Director

FAQ

What does Gerdau S.A. (GGB) report in this Form 6-K?

Gerdau S.A. uses this Form 6-K to furnish four documents: a material fact, a notice to shareholders about dividend payment, its 3Q25 results, and a 3Q25 earnings release, all dated around October 30–31, 2025.

Does the GGB Form 6-K include information about dividends?

Yes. One of the attached exhibits is a notice to shareholders regarding payment of dividends dated October 30, 2025. The main body of the report only lists this notice, while detailed dividend terms appear in the accompanying exhibit.

Which financial period is covered by Gerdau S.A.’s attached results?

The report lists Gerdau S.A.’s 3Q25 results as an exhibit titled “3Q25 Results Gerdau S.A.” dated October 30, 2025. It also includes a separate 3Q25 earnings release, giving additional narrative and metrics for the same quarter.

What is the purpose of the material fact attached to GGB’s Form 6-K?

The Form 6-K identifies a “Material Fact” dated October 30, 2025 as Exhibit 99.1. While details are within that exhibit, its inclusion signals company information considered important enough to be formally furnished to investors.

Who signed the Gerdau S.A. Form 6-K filed with the SEC?

The report is signed on behalf of Gerdau S.A. by Rafael Dorneles Japur, who is identified as Executive Vice President and Investor Relations Director, confirming the company’s authorization of the submitted information.

Does the GGB Form 6-K specify whether Gerdau files on Form 20-F or 40-F?

Yes. The report indicates that Gerdau S.A. files its annual reports under cover of Form 20-F, confirming its ongoing reporting framework as a foreign private issuer with the U.S. Securities and Exchange Commission.