This excerpt taken from the PBR 20-F filed May 22, 2009.
PifCos Corporate Structure
PifCo was established on September 24, 1997 as Brasoil Finance Company, a wholly owned subsidiary of Braspetro Oil Services Company, or Brasoil, a wholly owned subsidiary of Petrobras Internacional S.A. (Braspetro), which has since been absorbed by us. PifCos voting shares were transferred from Brasoil to us in 2000, since which time it has been our wholly owned subsidiary. Petrobras International Finance Company is an exempted company incorporated with limited liability under the laws of the Cayman Islands. PifCos registered office is located at Harbour Place, 103 South Church Street, 4th floor, George Town, Grand Cayman, Cayman Islands, and PifCos telephone number is 55-21-3487-2375.
PifCos four subsidiaries are: