Report of Foreign Issuer (6-k)

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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

June 2015

Vale S.A.

Avenida Graça Aranha, No. 26
20030-900 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 o

(Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1))

(Check One) Yes o No x

(Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7))

(Check One) Yes o No x

(Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.)

(Check One) Yes o No x

(If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b). 82- .)

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Press Release	3
Signature Page	4

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Transmitted only to

SEC, NYSE, CVM, BM&FBOVESPA, AMF, Euronext Paris and HKEx

Vale informs acquisition of relevant shareholding ownership

Rio de Janeiro, June 25, 2015 — Vale S.A. (Vale) informs, pursuant to §6th of Article 12 of Ruling 358/02 issued by the Brazilian Securities Commission (CVM), as subsequently amended, that Capital Group International, Inc. (CGII) informed to Vale on June 17, 2015 the acquisition of preferred class “A” shares issued by Vale, through stock exchange operations, increasing CGII’s managed portfolio position in Vale’s shares and reaching a holding of 101,979,060 in class “A” shares issued by Vale, equivalent to 5.03% of this class of share.

CGII is a holding for investment companies abroad, founded and operating under the laws of the United States of America, headquartered at 333, South Hope Street, Los Angeles, California 90071, USA, and belongs to the same group as Capital Research and Management Company (“CRMC”).

In addition to the shareholding managed by CGII, Capital World Investors and Capital Research Global Investors, independent investment divisions of CRMC, also have holdings in Vale. Capital World Investors manages 12,137,000 class “A” preferred shares issued by Vale, corresponding to 0.59% of this class of shares. Capital Research Global Investors manages 125,192,142 class “A” preferred shares issued by Vale, corresponding to 6.17% of this class of share.

CGII also informed that: (i) neither CGII nor any person associated with it holds, either directly or indirectly, convertible debentures issued by Vale; and also that (ii) it has no contract or agreement regulating the exercise of the voting rights or the purchase and sale of securities issued by Vale.

For further information, please contact:

+55-21-3814-4540

Rogerio Nogueira: rogerio.nogueira@vale.com

Andre Figueiredo: andre.figueiredo@vale.com

Carla Albano Miller: carla.albano@vale.com

Fernando Mascarenhas: fernando.mascarenhas@vale.com

Andrea Gutman: andrea.gutman@vale.com

Bruno Siqueira: bruno.siqueira@vale.com

Claudia Rodrigues: claudia.rodrigues@vale.com

Marcio Loures Penna: marcio.penna@vale.com

Mariano Szachtman: mariano.szachtman@vale.com

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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.