HRT Participacoes em Petroleo SA, formerly BN 16 Participacoes Ltda, is a Brazil-based holding company engaged in the oil and gas industry. The Company is primarily involved in the exploration and production (E&P) of oil and natural gas in Brazil and Namibia. Through its subsidiaries, it is active in the geophysical and geological research, exploration, development, production, import, export and sale of oil and natural gas, as well as in the provision of air logistics services in transporting people and equipment related to oil and gas activities in the exploratory campaign in the Solimoes Basin. As of December 31, 2011, the Company had seven subsidiaries, including Integrated Petroleum Expertise Company Servicos em Petroleo Ltda (IPEX), HRT O&G Exploracao e Producao de Petroleo Ltda, HRT Netherlands BV, HRT America Inc, HRT Africa, HRT Canada Inc and Air Amazonia Servicos Aereos Ltda. On July 19, 2013 it sold an aerial logistics business of the Company to Erickson Air-Crane Inc .