Antônio Carlos Sobreira de Agostini

Petro Rio O&G Exploração e Produção de Petróleo Ltda. explores and produces oil and natural gas. It also generates and distributes electric energy. The company was founded on July 20, 2009 and is headquartered in Rio de Janeiro, Brazil.

Commit Gás SA engages in distribution of natural gas. The company was founded on April 29, 1976 and is headquartered in Rio de Janeiro, Brazil.

Petrobras Química SA is a company based in Rio de Janeiro, Brazil that was founded in 1967. Part of Petroleo Brasileiro SA, the Brazilian company's corporate direction is focused on integrated growth, profitability, and socio-environmental responsibility.

Starfish Oil & Gas SA engages in oil and gas exploration and production activities. The company is ultimately controlled by the Government of The Republic of Angola and is based in Rio de Janeiro, Brazil. Starfish Oil & Gas was acquired by Sonangol Pesquisa e Produção SARL on January 31, 2010.

Petrobras America, Inc. explores, refines and trades petroleum and petroleum products. It also markets oil and oil products and procures materials and equipment. The company was founded in 1987 and is headquartered in Houston, TX.

Braspetro Oil Services Co. provides oil and gas exploration services. It mines, manufactures, trades, transports and stores petroleum. The company is headquartered in Rio de Janeiro, Brazil.