Company: PBR
Filing Date: 2025-08-20
Form Type: 6-K
Source: 0001292814-25-003126
Chunk: 0

Company: PETROBRAS - PETROLEO BRASILEIRO SA
Filing Date: 2025-08-20
Form: 6-K
Chunk 0
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<div align='center'>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 August, 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____</div>

Petrobras informs about the Chairman of the Board of Directors

—

Rio de Janeiro, August 20, 2025 –Petróleo Brasileiro S.A. – Petrobras, following up on the statement disclosed on December 16, 2024, announces that it
has received today the resignation, effective immediately, of the Chairman of the company's Board of Directors, Mr. Pietro Adamo Sampaio
Mendes, from his positions as Chairman and member of the Board of Directors due to new professional challenges.

Upon his resignation, Mr. Pietro Adamo
Sampaio Mendes expressed his gratitude to his fellow Board members, the members of the Executive Board led by CEO Magda Chambriard, and
Petrobras' teams for their collaboration during his tenure as Chairman of the Board. He also wished everyone success in the journey ahead.

In accordance with Paragraph 2 of Article
18 of the company’s Bylaws, the Board of Directors itself may elect a replacement for the Chairman in the event of a vacancy. This
election will remain valid until the next General