OREANDA-NEWS. March 18, 2011. HRT Participacoes em Petroleo S.A. - “HRT” or “Company” (BM&FBovespa: HRTP3), the holding company that controls an independent company involved in the exploration and production of oil and natural gas with concessions in Brazil (onshore) and Namibia (off shore), hereby announces its results for the 4th quarter of 2010 (4Q10). The fi nancial and operational information, except when indicated otherwise, is presented on a consolidated basis and includes the direct and indirect

subsidiaries HRT O&G Exploracao e Producao de Petroleo Ltda. (“HRT O&G”), Integrated Petroleum Expertise Company - Servicos em Petroleo Ltda. (“IPEX”), Ranger Participacoes Ltda. (“Ranger”)*, Labrea Petroleo Ltda. (“Labrea”) and HRT Netherlands B.V. (“Netherlands”), in accordance with Brazilian corporate law.