Company: PBR
Filing Date: 2025-09-04
Form Type: 6-K
Source: 0001104659-25-087159
Chunk: 0

Company: PETROBRAS - PETROLEO BRASILEIRO SA
Filing Date: 2025-09-04
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

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)</div>

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 ¨

<div align='center'>PETROBRAS ANNOUNCES THE PRICING OF U.S. DOLLAR-DENOMINATED GLOBAL NOTES</div>

RIO DE JANEIRO, BRAZIL – SEPTEMBER 3, 2025 –Petróleo
Brasileiro S.A. – Petrobras (“”) (NYSE: PBR) announces the pricing of two series of global notes denominated
in U.S. Dollars (the “”) to be issued by its wholly-owned subsidiary Petrobras Global Finance B.V. (“”).
The Notes will be unsecured obligations of PGF and will be fully, unconditionally and irrevocably guaranteed by Petrobras. Closing is
expected to occur on September 10, 2025.

The terms of the 5.125% Global Notes due 2030 are as follows:

| · | Issue: 5.125% Global Notes due 2030 |

| · | Amount: US$1,000,000,000 |

| · | Coupon: 5.125% |

| · | Issue price: 99.024% |

| · | Yield to Investors: 5.350% |

The terms of the 6.250% Global Notes due 2036 are as follows:

| · | Issue: 6.250% Global Notes due 2036 |

| · | Amount: US$1,