425

Filed by Oi S.A.

Pursuant to Rule 425 of the Securities Act of 1933

Subject Company: Oi S.A.

Commission File No.: 001-15256

Subject Company: Portugal Telecom SGPS S.A.

Commission File No.: 001-13758

THE FOLLOWING ARE MATERIALS MADE PUBLIC BY OI S.A. RELATING TO (1) THE PROPOSED MERGER OF SHARES (INCORPORAÇÃO DE AÇÕES) BETWEEN TELEMAR PARTICIPAÇÕES S.A. (“TMARPART”) AND OI S.A. (“OI”), AND (2) THE PROPOSED MERGER (INCORPORAÇÃO) OF PORTUGAL TELECOM, SGPS, S.A. (“PORTUGAL TELECOM”) WITH AND INTO TMARPART.


EXHIBIT INDEX

 

Exhibit
Number

  

Description of Document

1    Material Fact, dated July 23, 2014 (English translation).


Exhibit 1

 

LOGO    LOGO

Oi S.A.

Corporate Taxpayers’ Registry (CNPJ/MF) No. 76.535.764/0001-43

Board of Trade (NIRE) No. 33.30029520-8

Publicly-Held Company

MATERIAL FACT

Oi S.A. (“Oi” or the “Company,” Bovespa: OIBR3, OIBR4; NYSE: OIBR and OIBR.C), in compliance with art. 157, §4º of Law No. 6,404/76, pursuant to CVM Instruction No. 358/02 and, in addition to the Material Facts dated as of July 2 and July 15, 2014, notifies its shareholders and the market in general that, on July 22, 2014, the cure period for payment of the commercial paper (the “Commercial Paper”) issued by Rio Forte Investments S.A. (“Rio Forte”) that was the subject of investments currently held by PT Portugal SGPS, S.A. and Portugal Telecom International Finance B.V. expired without the amount due on the Commercial Paper having been paid.

The Company also discloses that, notwithstanding the Memorandum of Understanding entered into between the Company and Portugal Telecom SGPS, S.A. (“PT SGPS”) (which provides for the transfer of the Commercial Paper to PT SGPS in exchange for an amount equivalent to 100% of its face value as of the date of execution of the definitive agreements governing the exchange among the parties, among other conditions), until the effective transfer of the Commercial Paper, the Company’s subsidiaries PT Portugal SGPS, S.A. and Portugal Telecom International Finance B.V. will adopt all necessary measures for the collection of the Commercial Paper and any other acts necessary for the protection and defense of its interests.

Oi will keep its shareholders and the market informed of any material subsequent events related to the topics described in this Material Fact.

Rio de Janeiro, July 23, 2014.

Oi S.A.

Bayard De Paoli Gontijo

Chief Financial Officer and Investor Relations Officer

Additional Information and Where to Find It:

This communication is not an offering document and does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval in any jurisdiction in which distribution of an offering document or such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of that jurisdiction.

This communication contains information with respect to (1) the proposed merger of shares (incorporação de ações) between TmarPart and Oi, and (2) the proposed merger (incorporação) of Portugal Telecom with and into TmarPart.

In connection with the proposed merger of shares between TmarPart and Oi and the proposed merger of Portugal Telecom with and into TmarPart, TmarPart plans to file with the SEC (1) one or more registration statements on Form F-4, containing a prospectus or prospectuses which will be mailed to shareholders of Oi and Portugal Telecom (other than non-U.S. persons as defined in applicable rules of the SEC), and (2) other documents regarding the proposed merger of shares and proposed merger.

We urge investors and security holders to carefully read the relevant prospectuses and other relevant materials when they become available as they will contain important information about the proposed merger of shares and proposed merger.

Investors and security holders will be able to obtain the documents filed with the SEC regarding the proposed mergers, when available, free of charge on the Commission’s website at www.sec.gov or from TmarPart, Oi or Portugal Telecom.

Special Note Regarding Forward-Looking Statements:

This communication contains certain forward-looking statements. Statements that are not historical facts, including statements regarding the beliefs and expectations of TmarPart, Oi or Portugal Telecom, business strategies, future synergies and cost savings, future costs and future liquidity are forward-looking statements. The words “will,” “may,” “should,” “could,” “anticipates,” “intends,” “believes,” “estimates,” “expects,” “plans,” “targets,” “goal” and similar expressions, as they relate to TmarPart, Oi or Portugal Telecom, are intended to identify forward-looking statements and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, tendencies or expected results will actually occur. Such statements reflect the current views of management TmarPart, Oi or Portugal Telecom and are subject to a number of risks and uncertainties. These statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, corporate approvals, operational factors and other factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations. All forward-looking statements attributable to TmarPart, Oi, Portugal Telecom or their affiliates, or persons acting on their behalf, are expressly qualified in their entirety by the cautionary statements set forth in this paragraph. Undue reliance should not be placed on such statements. Forward-looking statements speak only as of the date they are made. Except as required under the U.S. federal securities laws and the rules and regulations of the SEC or of regulatory authorities in other applicable jurisdictions, TmarPart, Oi, Portugal Telecom and their affiliates do not have any intention or obligation to update or to publicly announce the results of any revisions to any of the forward-looking statements to reflect actual results, future events or developments, changes in assumptions or changes in other factors affecting the forward-looking statements. You are advised, however, to consult any further disclosures TmarPart, Oi or Portugal Telecom make on related subjects in reports and communications TmarPart, Oi or Portugal Telecom file with the SEC.