0000903423-08-000451 Sample Contracts

Autonomous City of Buenos Aires, May 20, 2008

Stock Purchase Agreement • May 22nd, 2008 • Petersen Energia, S.A. • Petroleum refining

• Contract Type
  Stock Purchase Agreement
• Filed
  May 22nd, 2008
• Company
  Petersen Energia, S.A.
• Industry
  Petroleum refining

AMENDED JOINT FILING AGREEMENT

Joint Filing Agreement • May 22nd, 2008 • Petersen Energia, S.A. • Petroleum refining

• Contract Type
  Joint Filing Agreement
• Filed
  May 22nd, 2008
• Company
  Petersen Energia, S.A.
• Industry
  Petroleum refining

THIS AMENDED JOINT FILING AGREEMENT (this “Agreement”) is made and entered into as of this 21st day of May 2008, by and among Enrique Eskenazi, Sebastián Eskenazi, Matías Eskenazi Storey, Ezequiel Eskenazi Storey, Petersen Energía S.A., Petersen Energía PTY LTD, Petersen Energía Inversora, S.A., and Petersen Energía Inversora Holding GmbH.