OREANDA-NEWS. HRT Participates em Petroleo S.A. (the "Company" or "HRT") (BM&FBOVESPA: HRTP3, TSX-V: HRP), in compliance with the provisions of Article 12 of CVM Instruction 358/02, announces that it received yesterday a letter from Aventti Strategic Partners LLP ("Aventti") informing that, on August 6, 2014, it reached a total amount of 1,906,190 common shares issued by HRT (on a post-reverse split basis or 19,061,900 pre-reverse split basis), equivalent to 6.41% of the total capital stock of the Company.

Aventti announces that such increase in the equity interest does not represent the purpose of altering the control composition or managing structure of the Company at this moment, and that does not hold nor acknowledge linked people as holder of convertible debentures into shares, subscription bonus, rights to subscribe to shares and stock options issued by the Company, as well as it states that has not entered into any contract or agreement regulating the right to vote or purchase and sale of securities issued by HRT.

HRT Participagoes holds one of the largest independent oil and gas exploration and production companies in Brazil. The HRT Group comprises six main subsidiaries: IPEX (Integrated Petroleum Expertise Company Servigos em Petroleo Ltda.), HRT O&G Exploragao e Produgao de Petroleo Ltda., HRT Netherlands B.V., HRT Africa Petroleo S.A., HRT America Inc. and HRT Canada Inc.. The Company retains a 55% interest in 19 exploratory blocks in the Solimoes Basin and 60% of interest in The Polvo Field, located in the southern portion of the Campos Basin. HRT also operates ten exploratory blocks off the Namibian coast: eight blocks in the Orange Sub-basin and two blocks in the Walvis Sub-basin. HRT's team includes PHDs and masters in geochemistry, geophysics, biology and engineering, most of them former employees of Petrobras and ANP (Brazil petroleum agency). HRT is committed to minimizing any possible environmental impacts in the sites where it acts. Our commitment to the local communities is towards health conditions, safety and quality of life. For more information, please visit the Company's website: www.hrt.com.br/ir <http://www.hrt.com.br/ir>