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
March 2026
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 informs on estimates
update Rio de Janeiro, March 31, 2026 – Vale S.A. (“Vale” or the “Company”) informs that it has updated
certain estimates previously disclosed to the market, including: (i) the inclusion of indicative guidance regarding the potential contribution
of its subsidiary Vale Base Metals Ltd. (“VBM”) to the Company’s consolidated EBITDA in the long term; and (ii) an
update to the sensitivity analysis of VBM’s cash flow for the 2026 fiscal year. VBM contribution to Vale’s EBITDA: Based
on its current long‑term assumptions and expectations, Vale estimates that its subsidiary VBM may account for approximately 30%
to 35% of the Company’s consolidated EBITDA from 2035 onwards. This estimate considers, as its main assumptions: (i) long‑term
price assumptions for copper, nickel and gold, based on the average of sell‑side analysts’ estimates available as of February
2026; and (ii) long‑term production projections for iron ore, nickel and copper, as previously disclosed to the market by Vale.
VBM Free Cash Flow: Vale estimates that VBM’s Free Cash Flow in 2026 may range approximately between US$0.4 billion and US$1.9
billion, in real terms. This estimate is based on: (i) low and high price estimates from sell side analysts for copper (approximately
US$11,600/t and US$13,200/t, respectively), for nickel (approximately US$15,000/t and US$18,100/t, respectively); and gold price (approximately
US$4,300/tr. oz and US$5,500/tr. oz, respectively). All other estimates disclosed by the Company in item 3 of its Reference Form remain
unchanged. The aforementioned item of the Company’s Reference Form will be restated to reflect the updates described above in due
course, in accordance with the deadline set forth in CVM Resolution No. 80/2022. Vale clarifies that the information disclosed in this
press release consists of estimates and forward‑looking statements, prepared based on assumptions and hypothetical data, and does
not represent any promise, guarantee or commitment of performance by the Company or its management. Actual results may differ materially
due to market conditions, macroeconomic factors, operational performance and other risks described in the Company’s periodic filings
with the CVM and the SEC. 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 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: March 31, 2026 |
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Director of Investor Relations |