PBR 6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

FORM6-K

REPORTOF FOREIGN PRIVATE ISSUER

PURSUANTTO RULE 13a-16 OR 15d-16

UNDERTHE SECURITIES EXCHANGE ACT OF 1934

Forthe month of September, 2024

CommissionFile Number 001-15106

PETRÓLEOBRASILEIRO S.A. - PETROBRAS

(Exact name of registrant as specified in its charter)

BrazilianPetroleum Corporation - PETROBRAS

(Translation of Registrant's name into English)

AvenidaHenrique Valadares, 28 20241-030 - Rio de Janeiro, RJFederative 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 is incorporated by reference in the Registration Statement on Form F-3 of Petróleo Brasileiro S.A. – Petrobras (No. 333-261817) and Petrobras Global Finance B.V. – PGF (No. 333-261817-01).

Exhibit 15.1 — Awareness Letter of KPMG Auditores Independentes.

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.

Date: September 3, 2024

Exhibit 15.1

KPMG Auditores Independentes

Rua do Passeio, 38, setor 2, 17º andar - Centro

20021-290 - Rio de Janeiro - RJ

Caixa Postal 2888 - CEP 20001-970 - Rio de Janeiro/RJ - Brasil

Telefone +55 (21) 2207-9400, Fax +55 (21) 2207-9000

www.kpmg.com.br

September 3, 2024

Petróleo Brasileiro S.A. - Petrobras

Av. Henrique Valadares, 28

20231-030 Rio de Janeiro—RJ

Petrobras Global Finance B.V.

Weena 798C, 23^rd^ floor

3014 DA Rotterdam

Rotterdam, The Netherlands

Re: Registration Statement Nos. 333-261817 and 333-261817-01 (the “Registration Statements”)

With respect to the Registration Statements of Petróleo Brasileiro S.A. – Petrobras and Petrobras Global Finance B.V., we acknowledge our awareness of the use and incorporation by reference therein of our report dated August 8, 2024 related to our review of the interim financial information of Petróleo Brasileiro S.A. – Petrobras.

Pursuant to Rule 436 under the U.S. Securities Act of 1933 (the “Act”), such report is not considered part of a registration statement prepared or certified by an independent registered public accounting firm, or a report prepared or certified by an independent registered public accounting firm within the meaning of Sections 7 and 11 of the Act.