00003 Union Oil Company of California
00056 ConocoPhillips Company
00059 Hess Corporation
00078 Chevron U.S.A. Inc.
00276 Exxon Mobil Corporation
00689 Shell Offshore Inc.
00724 Marathon Oil Company
00730 Walter Oil & Gas Corporation
01284 W & T Offshore, Inc.
01308 Ridgewood Energy Corporation
01500 TOTAL E&P USA, INC.
01999 Houston Energy, L.P.
02219 Anadarko US Offshore Corporation
02277 BHP Billiton Petroleum (Deepwater) Inc.
02397 Samson Offshore, LLC
02417 Arena Energy, LP
02481 BP Exploration & Production Inc.
02574 CL&F Resources LP
02647 Murphy Exploration & Production Company - USA
02668 Red Willow Offshore, LLC
02740 Knight Resources, LLC
02748 Statoil Gulf of Mexico LLC
02828 Reserves Management, L.C.
02873 Cobalt International Energy, L.P.
02917 Rooster Oil & Gas, LLC
02961 Byron Energy Inc.
02967 Peregrine Oil & Gas II, LLC
02970 Castex Offshore, Inc.
02990 Ecopetrol America Inc.
03026 EnVen Energy Ventures, LLC
03035 Fieldwood Energy Offshore LLC
03065 Stone Energy Offshore, L.L.C.
03201 GCER Offshore, LLC
03214 OCXO, LLC.
03228 Venari Offshore LLC
03238 LLOG Bluewater Holdings, L.L.C.
03247 Talos Energy Offshore LLC
03263 PXP Offshore LLC
03296 Apache Shelf Exploration LLC
03310 GulfSlope Energy, Inc.
03362 Deep Gulf Energy III, LLC
03378 Navitas Petroleum US, LLC
