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
September 2025
Vale S.A.
Praia de Botafogo nº 186, 18º andar,
Botafogo
22250-145 Rio de Janeiro, RJ, 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.)
(Check One)
Form 20-F x Form 40-F ¨
Vale pays semi-annual remuneration on its participating debentures Rio de Janeiro, September 22th, 2025 – Vale S.A. (“Vale”)
informs that it will pay the semi-annual remuneration on its participating debentures (“debentures”) on September 30th, 2025,
in the gross amount of R$ 1.539897539 per debenture, totaling R$ 598,341,134.23 to holders of debentures with a position registered in
custody with B3 S.A. - Brasil, Bolsa, Balcão (“B3”) and/or with Banco Bradesco S.A. (“Bradesco”), on the
closing of September 29th, 2025. This amount includes the following payments: (i) the premium associated with iron ore product sales,
R$ 573,064,234.30; (ii) the premium associated with copper concentrate product sales, R$ 25,181,899.93 and (iii) premium on sale of a
mining right, R$ 95,000.00. The financial settlement will be on October 1st, 2025, through B3 or Bradesco, according to the debentures’
custody agent. Withholding income tax will be charged on the amount paid to holders of the debentures, at the rate applicable to fixed
income from financial investments. The tax rate will vary according to each investors individual situation, with exemption exclusively
for those who can provide unequivocal, legal proof of their tax-exempt status. Marcelo Feriozzi Bacci Executive Vice President, Finance
and Investor Relations For further information, please contact: Vale.RI@vale.com Thiago Lofiego: thiago.lofiego@vale.com Mariana Rocha:
mariana.rocha@vale.com Luciana Oliveti: luciana.oliveti@vale.com Pedro Terra: pedro.terra@vale.com Patricia Tinoco: patricia.tinoco@vale.com
This press release may include statements that present Vale’s expectations about future events or results. All statements, when
based upon expectations about the future, involve various risks and uncertainties. Vale cannot guarantee that such statements will prove
correct. These risks and uncertainties include factors related to the following: (a) the countries where we operate, especially Brazil
and Canada; (b) the global economy; (c) the capital markets; (d) the mining and metals prices and their dependence on global industrial
production, which is cyclical by nature; and (e) global competition in the markets in which Vale operates. To obtain further information
on factors that may lead to results different from those forecast by Vale, please consult the reports Vale files with the U.S. Securities
and Exchange Commission (SEC), the Brazilian Comissão de Valores Mobiliários (CVM) and in particular the factors discussed
under “Forward-Looking Statements” and “Risk Factors” in Vale’s annual report on Form 20-F. Press Release

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.
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Vale S.A.
(Registrant) |
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By: |
/s/ Thiago Lofiego |
Date: September 22, 2025 |
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Director of Investor Relations |