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6-K

Gerdau S.A. (GGB)

6-K 2023-01-27 For: 2023-01-27
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Added on April 11, 2026

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

SECURITIESEXCHANGE ACT OF 1934

Dated January 27, 2023

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 Form 20-F or Form 40-F.

Form 20-F    x        Form 40-F    ¨

Exhibit Index

Exhibit Description of Exhibit
99.1 Minutes of the Meeting of the Board of Directors held on January 27, 2023

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:  January 27, 2023

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

Exhibit 99.1

GERDAU S.A.

Corporate Taxpayer ID (CNPJ): 33.611.500/0001-19

Company Registry (NIRE): 35300520696

Publicly Held Company

MINUTES OF THE BOARD OF DIRECTORS MEETINGHELD AT THE REGISTERED OFFICE LOCATED AT AVENIDA DOUTORA RUTH CARDOSO, 8.501, 8º ANDAR, CONJUNTO 2, PINHEIROS, IN THE CITYAND STATE OF SÃO PAULO, ON JANUARY 17, 2023, AT 10:00 A.M.

1.            All directors participated in the meeting, in accordance with the Charter, which was presided over by Guilherme Chagas Gerdau Johannpeter, with Fábio Eduardo de Pieri Spina acting as secretary.

2.            The Board of Directors unanimously approved the removal of Executive Vice-President Fernando Pessanha Santos, effective immediately. The Board of Directors thanks Fernando Pessanha Santos for his important contributions to the Company.

3.            No other matters were discussed.

Signatures: Guilherme Chagas Gerdau Johannpeter (Chairman). André Bier Gerdau Johannpeter and Claudio Johannpeter (Vice-Chairmen). Gustavo Werneck da Cunha, Claudia Sender Ramirez, Augusto Braúna Pinheiro and Alberto Fernandes (Directors). Fábio Eduardo de Pieri Spina (Secretary).

I hereby certify that this is a faithful copy of the original instrument drawn up in the Company's records.

São Paulo, January 17, 2023

Fábio Eduardo de Pieri Spina

Secretary

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