Company: PBR
Filing Date: 2025-09-05
Form Type: 424B2
Source: 0001104659-25-087755
Chunk: 21

Company: PETROBRAS - PETROLEO BRASILEIRO SA
Filing Date: 2025-09-05
Form: 424B2
Chunk 21
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 transferred only in principal                                   
 amounts of U.S.$2,000 and in integral multiples of U.S.$1,000 in excess thereof; and |

| · | be unconditionally guaranteed by Petrobras pursuant 
 to a guaranty described below under “—Guaranties.”  |

All payments of principal and interest
on the 2036 Notes will be paid in U.S. dollars;

Interest on the 2036 Notes will be paid semi-annually on January 10 and July 10 of each year (each of which we refer to as an “interest payment date”), commencing on January 10, 2026 and the regular record date for any interest payment date will be the business day preceding that date; and

In the case of amounts not paid by PGF under the indenture and the 2036Notes (or Petrobras under the guaranty for the 2036 Notes), interest will continue to accrue on such amounts at a default rate equal to 0.5% in excess of the interest rate on the 2036 Notes, from and including the date when such amounts were due and owing and through and excluding the date of payment of such amounts by PGF or Petrobras.

Despite the Brazilian
government’s ownership interest in Petrobras, the Brazilian government is not responsible in any manner for PGF’s
obligations under the 2036 Notes or Petrobras’s obligations under the guaranty for the
2036 Notes.

<div align='center'>S-21</div>

Guaranties

Petrobras will unconditionally
and irrevocably guarantee the full and punctual payment when due, whether at the maturity date of the Notes, or earlier or later by acceleration
or otherwise, of all of PGF’s obligations now or hereafter existing under the indenture and the Notes, whether for principal, interest,
make-whole premium, fees, indemnities, costs, expenses or otherwise. The guaranties will be unsecured and will rank equally with all of
Petrobras’s other existing and future unsecured and unsubordinated debt including guaranties previously issued by Petrobras in connection
with prior issuances of indebtedness. See “Description of the Guaranties.”

Depositary with Respect to Global Notes

The Notes will be issued in global registered form with The Depository Trust Company (“DTC”) as depositary. For further
information in this regard, see “Clearance and Settlement.”

Events of Default

The