Eneva : Notice to the Market - Shareholding position ...

Shareholding position held by OGX Rio de Janeiro, October 7, 2016 - ENEVA S.A. ("ENEVA" or "Company") (BM&FBOVESPA: ENEV3, GDR I: ENEVY), in compliance with article 12 of CVM Notice No. 358/2002, hereby informs its shareholders and the market in general that received the attached correspondence from OGX Petróleo e Gás Participações S.A. - in Judicial Recovery ("OGX") informing that, upon the completion of the capital increase approved by the Board of Directors on October 3, 2016, as disclosed on a Material Fact Notice dated on October 3, 2016, now holds a total of 14,875,412 shares, representing 6.22% of the Company's total issued shares. Pedro Zinner

Executive Vice President - CFO and Investor Relations Officer

ENEVA S.A.

(Original in Portuguese - free translation into English) Rio de Janeiro, October 06, 2016

To

Eneva S.A.

Praia do Flamengo No. 66 Bloco A 22210-903, Rio de Janeiro, RJ.

Att.: Mr. Pedro Zinner

Re.: Acquisition of material equity interest. Dear Sir,

As you know, in compliance with article 12, caput, of Instruction No. 358 of the Brazilian Securities and Exchange Commission ("CVM"), dated January 03, 2002, as amended ("CVM Instruction 358"), OGX Petróleo e Gás Participações S.A. - in Judicial Recovery ("OGX"), a corporation organized pursuant to the laws of the Federative Republic of Brazil, headquartered at Rua do Passeio No. 56, 11 Andar, Rio de Janeiro, RJ, Brazil, enrolled with the Corporate Taxpayer's Registry of the Ministry of Finance ("CNPJ/MF") under No. 08.926.302/0001-05; hereby informs you that, due to the capital increase disclosed by Eneva S.A. ("Company"), a publicly held company enrolled with the CNPJ/MF under No. 04.423.567/0001-21, by means of the Material Fact dated October 03, 2016, it now holds 14,875,412 (fourteen million, eight hundred seventy-five thousand, four hundred and twelve) common shares ("ON Shares") issued by the Company. Such ON shares correspond to 6.2207% of all shares issued by the Company.

According to the terms of article 12 of CVM Instruction 358, OGX further states that:

• This is a minority investment, not intended to change the Company's shareholding control or its administrative structure.

• Presently, OGX does not hold other securities issued by the Company, nor does it hold derivative financial instruments in reference to such ON shares, whether of physical or financial liquidation; and

• According to the material fact disclosed by OGX on July 15, 2016, pursuant to the agreement ("Partial Agreement") entered into by Nordic Trustee ASA ("Nordic") after Eneva's Payment of Capital, all shares issued by Eneva fully paid-up by OGX shall be entirely blocked and unavailable for a maximum of 18 (eighteen) months as of the approval of the Partial Agreement, and such term may end sooner under certain circumstances, including the execution and approval of a final agreement ("Final Agreement "). Such Final Agreement may involve the equity interest held by OGX in Eneva. There are no other contracts and agreements executed by OGX, in addition the information already pointed out, which regulate the exercise of voting rights or the purchase and sale of securities issued by the Company.

We would like to extend our sincere thanks and we remain at your disposal should you have any questions.

Best regards,

OGX Petróleo e Gás S.A. - in Judicial Recovery Márcia Lemos Mainenti

CFO and Investor Relations Officer