Gerdau closes R$150m DFESA stake acquisition

Q: How much did Gerdau (GGB) pay for the DFESA equity stake?

The DFESA stake was acquired for a total value of R$150 million. Including a proportional consolidated cash balance of R$719,205.75, Gerdau's total cash disbursement reached R$150,719,205.75, fully paid in cash.

Q: What percentage of DFESA did Gerdau (GGB) acquire from COPEL?

Gerdau acquired 23.03% of the share capital of Dona Francisca Energética S.A. from COPEL. This stake represents the entire equity interest previously held by COPEL in DFESA and is now fully owned by Gerdau.

Q: How did Gerdau (GGB) finance the DFESA acquisition?

Gerdau financed the DFESA acquisition entirely with its own available resources. The company made a total cash disbursement of R$150,719,205.75, fully paid in cash, without reference to external funding in the disclosure.

Q: How does the DFESA acquisition fit Gerdau (GGB)'s strategy?

Gerdau states the acquisition supports its capital allocation discipline and enhances competitiveness in its cost structure. It expands renewable energy self-production, aligning with the company’s previously disclosed decarbonization strategy and long-term focus on cleaner energy sources.

Gerdau S.A. has completed the acquisition of the entire equity stake in Dona Francisca Energética S.A. held by Companhia Paranaense de Energia, corresponding to 23.03% of DFESA's share capital, for a total value of R$150 million.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

6-K

Rhea-AI Filing Summary

Gerdau S.A. has completed the acquisition of the entire equity stake in Dona Francisca Energética S.A. held by Companhia Paranaense de Energia, corresponding to 23.03% of DFESA's share capital, for a total value of R$150 million.

The transaction closed after satisfaction of conditions precedent, including approval by the Brazilian antitrust authority. Including the proportional consolidated cash balance of R$719,205.75, Gerdau made a total cash disbursement of R$150,719,205.75, fully paid with its own resources. The company states that this investment supports its renewable energy self-production and aligns with its decarbonization strategy and capital allocation discipline.

Key Figures

Equity stake acquired: 23.03% of DFESA share capital Acquisition value: R$150 million Proportional consolidated cash balance: R$719,205.75 +1 more

4 metrics

Equity stake acquired 23.03% of DFESA share capital Entire equity stake in DFESA previously held by COPEL

Acquisition value R$150 million Total value of the acquisition of DFESA stake

Proportional consolidated cash balance R$719,205.75 Cash balance included in calculating total cash disbursement

Total cash disbursement R$150,719,205.75 Amount paid in cash using Gerdau's own available resources

Key Terms

conditions precedent, antitrust authority, renewable energy self-production, decarbonization strategy

4 terms

conditions precedent regulatory

"The transaction closed following the satisfaction of the applicable conditions precedent"

Conditions precedent are the specific tasks, approvals, or facts that must be satisfied before a contract or transaction becomes effective or a payment is made. Think of them as a checklist you must complete before turning the key on a new machine; if items are missing the deal can be delayed, renegotiated, or canceled. Investors watch these conditions because they determine timing, completion risk, and whether expected benefits will actually occur.

antitrust authority regulatory

"including approval by the Brazilian antitrust authority"

A government agency or regulatory body that enforces competition (antitrust) laws by investigating and stopping unfair business practices such as price-fixing, monopolistic conduct, and anti-competitive mergers. Like a referee in a game, it can block or require changes to deals, order companies to change behavior, or impose fines, and those actions can change a company’s legal risks, future profits, and the value of its shares.

renewable energy self-production technical

"through the expansion of renewable energy self-production"

decarbonization strategy technical

"in line with the Company’s previously disclosed decarbonization strategy"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What acquisition did Gerdau (GGB) complete on August 6, 2026?

Gerdau completed the acquisition of the entire equity stake in Dona Francisca Energética S.A. held by COPEL, equal to 23.03% of DFESA's share capital. The deal was finalized on August 6, 2026 after all conditions precedent were satisfied.

How much did Gerdau (GGB) pay for the DFESA equity stake?

The DFESA stake was acquired for a total value of R$150 million. Including a proportional consolidated cash balance of R$719,205.75, Gerdau's total cash disbursement reached R$150,719,205.75, fully paid in cash.

What percentage of DFESA did Gerdau (GGB) acquire from COPEL?

Gerdau acquired 23.03% of the share capital of Dona Francisca Energética S.A. from COPEL. This stake represents the entire equity interest previously held by COPEL in DFESA and is now fully owned by Gerdau.

How did Gerdau (GGB) finance the DFESA acquisition?

Gerdau financed the DFESA acquisition entirely with its own available resources. The company made a total cash disbursement of R$150,719,205.75, fully paid in cash, without reference to external funding in the disclosure.

How does the DFESA acquisition fit Gerdau (GGB)'s strategy?

Gerdau states the acquisition supports its capital allocation discipline and enhances competitiveness in its cost structure. It expands renewable energy self-production, aligning with the company’s previously disclosed decarbonization strategy and long-term focus on cleaner energy sources.

What regulatory approval was needed for Gerdau (GGB)'s DFESA deal?

The transaction was completed after satisfaction of conditions precedent, including approval by the Brazilian antitrust authority. This clearance was required before closing and is specifically cited as one of the key conditions for the acquisition to be finalized.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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

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Available on EDGAR 08/06/2026 - 05:14 PM Accepted by SEC EDGAR 08/06/2026 - 05:13 PM

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 August 6, 2026

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		Notice to the Market – Closing of the Acquisition of Equity Stake

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: August 6, 2026

	GERDAU S.A.

	By:	/s/ Rafael Dorneles Japur
	Name:	Rafael Dorneles Japur
	Title:	Vice-President and Investor Relations Officer

Exhibit 99.1

GERDAU S.A.

Corporate Tax ID (CNPJ/MF): 33.611.500/0001-19
Registry (NIRE): 35300520696

NOTICE TO THE MARKET

Gerdau S.A. (B3: GGBR / NYSE: GGB) (“Company”), further to the Notice to the Market disclosed on June 15, 2026, informs its shareholders and the market in general that it has concluded, on this date, the acquisition of the entire equity stake in Dona Francisca Energética S.A. (“DFESA”), corresponding to 23.03% of its share capital, held by Companhia Paranaense de Energia (“COPEL”).

The transaction closed following the satisfaction of the applicable conditions precedent, including approval by the Brazilian antitrust authority. The acquisition was completed at a total value of R$150 million. Including the proportional consolidated cash balance of R$719,205.75, the Company made a total cash disbursement of R$150,719,205.75, fully paid in cash with its own available resources.

The acquisition is aligned with Gerdau’s capital allocation discipline, contributing to increased competitiveness in its cost structure through the expansion of renewable energy self-production, in line with the Company’s previously disclosed decarbonization strategy.

São Paulo, August 6, 2026.

Rafael Dorneles Japur

Vice-President and

Investor Relations Officer

Source: View Original Filing on SEC EDGAR

Filing Exhibits & Attachments

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EX-99.1 EXHIBIT 99.1 4.7 KB