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, 2026
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 informs about the monetary
adjustment of remuneration to shareholders related to the 2025 Fiscal Year
—
Rio de Janeiro, May 14, 2026 –
Petróleo Brasileiro S.A. – Petrobras, following up on the Material Fact published on 03/05/2026 and the Communication on
04/16/2026, informs that it will carry out, on 05/20/2026, the payment of the first installment of remuneration to shareholders related
to the fourth quarter of 2025, with the shareholder position of 04/22/2026 as the record date.
The payment of this installment will be
made in the form of interest on capital whose gross value per share will be adjusted by the Selic rate from 12/31/2025 to 05/20/2026,
as follows:

It should be noted that income tax will
be levied, in accordance with current tax legislation, both on the amount paid in the form of interest on capital as well as on the amount
corresponding to the monetary adjustment.
Credit instructions
The payment will be made by Banco Bradesco
S.A. (Bradesco), institution depositary of book-entry
shares. All shareholders, who have their
registration duly updated, will have their rights automatically
credited to their bank accounts on the
payment date. More information can be obtained through any Bradesco branch or by calling 0800-7011616.
For shareholders with custody in B3, the
payment will be done by deposit brokers.
For holders of American Depositary Receipts
(ADRs) negotiated on the New York Stock Exchange (NYSE), the payment will be made as of May 28, 2026 by JP Morgan Chase, depositary bank
of ADRs. Information and clarifications may be obtained at <www.adr.com>.
www.petrobras.com.br/ri
Para mais informações:
PETRÓLEO BRASILEIRO S.A. – PETROBRAS
| Relações com Investidores
E-mail: petroinvest@petrobras.com.br/acionistas@petrobras.com.br
Av. Henrique Valadares 28 – 9º andar –
20031-030 – Rio de Janeiro, RJ
Tel.: 55 (21) 3224-1510/9947
Este documento pode conter previsões
segundo o significado da Seção 27A da Lei de Valores Mobiliários de 1933, conforme alterada (Lei de Valores Mobiliários)
e Seção 21E da lei de Negociação de Valores Mobiliários de 1934 conforme alterada (Lei de Negociação)
que refletem apenas expectativas dos administradores da Companhia. Os termos: “antecipa”, “acredita”, “espera”,
“prevê”, “pretende”, “planeja”, “projeta”, “objetiva”, “deverá”,
bem como outros termos similares, visam a identificar tais previsões, as quais, evidentemente, envolvem riscos ou incertezas, previstos
ou não, pela Companhia. Portanto, os resultados futuros das operações da Companhia podem diferir das atuais expectativas,
e, o leitor não deve se basear exclusivamente nas informações aqui contidas.
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 14, 2026
PETRÓLEO BRASILEIRO S.A–PETROBRAS
By: /s/ Fernando Sabbi Melgarejo
______________________________
Fernando Sabbi Melgarejo
Chief Financial Officer and Investor Relations
Officer