Petrobras (NYSE: PBR) 6-K on F-3 underwriting pact and prospectus supplement

Rhea-AI Filing Summary

Petróleo Brasileiro S.A. – Petrobras submitted a Form 6-K as a foreign private issuer. The filing states that this report is incorporated by reference into the company’s existing Registration Statement on Form F-3 (No. 333-283981) for Petrobras and Petrobras Global Finance B.V. and into the related prospectus supplement dated September 3, 2025. The Form 6-K includes Exhibit 1.1, which is an underwriting agreement, and is executed on behalf of Petrobras by attorneys-in-fact Andre Gameiro Rua and Lucas Tavares de Mello.

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

Accepted by SEC EDGAR 09/04/2025 - 10:53 AM Learn about SEC filing dates

FAQ

What does Petrobras (PBR) report in this Form 6-K?

The Form 6-K from Petróleo Brasileiro S.A. – Petrobras provides a report as a foreign private issuer and specifies that it is being incorporated by reference into an existing Form F-3 registration statement and related prospectus supplement.

How is this Petrobras Form 6-K linked to its Form F-3 shelf registration?

The report states that it shall be deemed incorporated by reference into the Registration Statement on Form F-3 (No. 333-283981) of Petrobras and Petrobras Global Finance B.V. and the related prospectus supplement dated September 3, 2025.

What key exhibit is included with this Petrobras Form 6-K?

The filing lists Exhibit 1.1 – Underwriting Agreement as part of the Form 6-K, indicating that the underwriting agreement is formally furnished in connection with the registration statement and prospectus supplement.

Who signed this Form 6-K on behalf of Petrobras?

The Form 6-K is signed on behalf of Petróleo Brasileiro S.A. – Petrobras by Andre Gameiro Rua and Lucas Tavares de Mello, each acting as an attorney-in-fact.

When is the related Petrobras prospectus supplement dated?

The Form 6-K indicates that it is incorporated by reference into the related prospectus supplement dated September 3, 2025, associated with the Form F-3 registration statement.

Is Petrobras classified as a foreign private issuer in this filing?

Yes. The document is a Form 6-K Report of Foreign Private Issuer filed under the Securities Exchange Act of 1934, confirming Petrobras’ status as a foreign private issuer for this report.

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 September, 2025

Commission File Number 001-15106

PETRÓLEO BRASILEIRO S.A. - PETROBRAS

(Exact name of registrant as specified in its charter)

Brazilian Petroleum Corporation - PETROBRAS

(Translation of Registrant's name into English)

Avenida Henrique Valadares, 28 
20241-030 - Rio de Janeiro, RJ
Federative Republic of Brazil

(Address of principal executive office)

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 ¨

This report on Form 6-K shall be deemed to be incorporated by reference into the Registration Statement on Form F-3 of Petróleo Brasileiro S.A. — Petrobras (No. 333-283981) and Petrobras Global Finance B.V. – PGF (No. 333-283981-01) and the related prospectus supplement dated September 3, 2025.

Exhibit 1.1 — Underwriting Agreement

SIGNATURE

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.

	PETRÓLEO BRASILEIRO S.A--PETROBRAS
	By:	/s/ Andre Gameiro Rua
		Name: Andre Gameiro Rua
		Title: Attorney-in-fact
	By:	/s/ Lucas Tavares de Mello
		Name: Lucas Tavares de Mello
		Title: Attorney-in-fact

Date: September 3, 2025