Dommo Energia S.A.

CNPJ/MF: 08.926.302/0001-05

Public Company - B3: OGSA3

- Change of denomination to Dommo Energia - Rio de Janeiro, September 19th, 2017 - Dommo Energia S.A. ("Dommo Energia" or "Company") (B3: OGSA3; OTC: OXPRY.PK), announces to its shareholders and market that, in the Extraordinary General Shareholders' Meeting held on the hereby date, the change of OGX Petróleo e Gás S.A.'s denomination was approved to Dommo Energia S.A..

The Company also informs that, from September 21st, 2017, the securities currently traded in the stock exchange B3 S.A. - Brasil, Bolsa, Balcão will change the trading name to DOMMO and the negotiation code to DMMO, therefore, the common shares will be traded under the code DMMO3 .

The American Depositary Shares ("ADS") associated to the Program of American Depositary Receipts ("ADRs") Level 1 of the Company will be negotiated with a new trading name and negotiation code once the related documents are filed in the regulatory agencies. The Company will keep the market informed on this matter.

Dommo Energia emerges from a reestructuring process with a new organizational culture focused on results and operational efficiency. The new denomination alludes to a geology term associated to salt structures, which favor the accumulation of oil and gas.

Rio de Janeiro, September 19th, 2017 Paulo Narcélio Simões Amaral

Chief Executive, Financial and Investor Relations Officer

Dommo Energia S.A. Legal Notice

This document contains Company-related statements and information that reflect the current vision and/or expectations the Company and its management have regarding its business plan. These include, among others, all forward-looking statements that involve forecasts and projections, indicate or imply results, performance or future achievements, and may contain words such as "believe," "foresee," "expect," "consider," "is likely to result in" or other words or expressions of similar meaning. Such statements are subject to a series of expressive risks, uncertainty and premises. Please be advised that several important factors can cause the actual results to diverge materially from the plans, objectives, expectations, estimations, and intentions expressed in this document. In no event shall the Company or the members of its board, directors, assigns or employees be liable to any third party (including investors) for investment decisions or acts or business carried out based on the information and statements that appear in this presentation, or for indirect damage, lost profit or related issues. The Company does not intend to provide to potential shareholders with a revision of the statements or an analysis of the differences between the statements and the actual results. Each investor must conduct and rely on its own evaluation, including of the associated risks, in making an investment decision.

Dommo Contacts Investors:

Paulo Narcélio

Victor Rosenzvaig Cinthya Coutinho

ri@dommoenergia.com.br

+55 21 3916-4545

Media:

Cibele Flores cibele.flores@dommoenergia.com.br

+55 21 3916-4505

Oleo e Gas Participacoes SA em Recuperacao Judicial published this content on 19 September 2017 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 19 September 2017 23:39:07 UTC.

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