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 of the

Securities Exchange Act of 1934

For the month of May, 2025

Commission File Number 1-15106

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 – 9th floor 
20231-030 – 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 Form 20-F or Form 40-F. 

Form 20-F ___X___ Form 40-F _______

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No___X____

Petrobras announces agreement with Proquigel
—

Rio de Janeiro, May 9, 2025 – Petróleo Brasileiro S.A. – Petrobras informs, following up on the disclosures made on January 13, 2025, and April 23, 2025, that Proquigel, a subsidiary of Unigel, has approved the agreement to resolve existing contractual disputes and litigation between the parties. Petrobras' Board of Directors ratified the decision, authorizing the signing of the agreement, with a deadline for signing until May 31, 2025.

The agreement provides for the reinstatement of Petrobras' possession of the fertilizer plants (FAFENs) in Bahia and Sergipe, and the resumption of operations by Petrobras through a bidding process for the contracting of Operation and Maintenance services, in compliance with applicable governance practices and internal procedures.

To take effect, the agreement must still be ratified by the Arbitral Tribunal.

As disclosed in its 2025-2029 Business Plan, Petrobras aims to resume activities in the fertilizer segment to create value through the production and commercialization of nitrogen-based products, while aligning with the oil and natural gas production chain and the energy transition.

Any material developments will be promptly disclosed to the market.

www.petrobras.com.br/ir

For more information:

PETRÓLEO BRASILEIRO S.A. – PETROBRAS | Investor Relations

Email: petroinvest@petrobras.com.br/acionistas@petrobras.com.br

Av. Henrique Valadares, 28 – 9th floor – 20231-030 – Rio de Janeiro, RJ.

Tel.: 55 (21) 3224-1510/9947

This document may contain forecasts within the meaning of Section 27A of the Securities Act of 1933, as amended (Securities Act), and Section 21E of the Securities Trading Act of 1934, as amended (Trading Act) that reflect the expectations of the Company's officers. The terms: "anticipates", "believes", "expects", "predicts", "intends", "plans", "projects", "aims", "should," and similar terms, aim to identify such forecasts, which evidently involve risks or uncertainties, predicted or not by the Company. Therefore, future results of the Company's operations may differ from current expectations, and the reader should not rely solely on the information included herein.

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: May 9, 2025

PETRÓLEO BRASILEIRO S.A–PETROBRAS

By: /s/ Fernando Sabbi Melgarejo

______________________________

Fernando Sabbi Melgarejo

Chief Financial Officer and Investor Relations Officer