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6-K

Gerdau S.A. (GGB)

6-K 2023-03-17 For: 2023-03-16
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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 March 16, 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 Material Fact, March 15,<br>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:  March 16, 2023

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

Exhibit 99.1

GERDAUS.A.

Tax ID (CNPJ/ME) 33.611.500/0001-19

Registry (NIRE): 35300520696

materialfact

Gerdau S.A. (B3: GGBR / NYSE: GGB), ("Company") in addition to the Material Fact disclosed on November 25, 2022, hereby informs its shareholders and the market in general that the transaction between its subsidiary Gerdau Next S.A. (“Gerdau Next”) and Fundo Newave Energia I Advisory Fundo de Investimento em Participações Multiestratégia (“NW Capital”), as investors, with Newave Energia S.A. (“Newave”) was concluded on March 15, 2023, after observance of the respective precedent conditions, aiming at (i) the subscription of equity interest in the capital stock of Newave by Gerdau Next and NW Capital, in the proportions of 33.33% and 66.67%, respectively; and (ii) the long-term acquisition of energy, by the Company and its subsidiaries, of 30% (thirty percent) of the energy generated by the energy generation projects directly or indirectly held by Newave and its subsidiaries, on a self-production basis (“Transaction”).

In this first phase of the Transaction, Gerdau Next subscribed R$ 500,000,000.00 (five hundred million reais), which must be paid in up to 18 (eighteen) months, according to capital calls and provided that the conditions related to the capital contributions agreed with Newave.

The operation aims to generate greater cost competitiveness in the steel business and provide the Company with a clean energy supply and strives to achieve the carbon emission reduction targets set by the Company.

São Paulo, March 15, 2023

Rafael Dorneles Japur

Executive Vice-President

Investor Relations Officer