Amegy Bank of Texas
Andrews & Kurth L.L.P.
Avista Capital Partners
Bank of Texas, N.A.
Barclays Capital
Black Stone Minerals Company, L.P.
J.H. Blades & Co.
BMO Capital Markets
Bold Energy II LLC
BP Energy
Bracewell & Giuliani LLP
Cardinal Midstream
Carey of Houston
Carrizo Oil & Gas., Inc.
J.L. Castillo
Citation Oil & Gas Corp.
Copano Energy
Cordillera Energy Partners II, LLC
D.E. Shaw
Deloitte & Touche LLP
Diverse Energy Management Co. &   Merrick Capital
Empresa Energy, LP
Empresa Energy, LP
ESS Funds
Energy XXI
EnerVest, Ltd.
Escondido Resources II, LLC
Fair Oaks Production
Foothills Energy LLC
Force 5 Energy, LLC
Forest Oil Corporation
Guggenheim Partners
Halliburton
Hercules Offshore, Inc.
Jefferies & Company
Jones Energy, Ltd.
Kayne Anderson Energy Funds
Korn Ferry International

Lantana Oil & Gas Partners
Legado Resources
Legado Resources
Liberty Mutual Insurance Group
Locke, Lord Bissell & Liddell
Macquarie Tristone
Marquette Exploration
Mediterranean Resources, LLC
Milagro Exploration
Morgan Stanley
Municipal Energy Resources Corp.
National Oilwell Varco
Natural Gas Partners
Netherland, Sewell & Assoc., Inc.
NextEra Energy Resources
NGP Capital Resources Co.
Oil States International
Peregrine Oil & Gas
PetroEdge Energy
Petrohawk Energy Corporation
Phillips Energy Partners LLC.
Plantation Petroleum Companies
Protégé Energy LLC
Quantum Resources Management LLC
Raymond James
Raymond James
Renaissance Petroleum Co., LLC
RiverStone Energy
Swift Energy Company
T. J. Smith & Company, Inc.
Tammany Oil & Gas
TD Securities
Texon L.P.
The Oil & Gas Asset Clearinghouse
Tracker-TRZ Energy
Vaalco Energy Inc.
Vinson & Elkins, L.L.P.
Wedge Group
Wortham Insurance & Risk   Management

Arena Energy, LLC
BBVA Compass
Cabot Oil & Gas Corporation
Dian Graves Owen Foundation
Donovan Capital
Hilcorp Energy Company
IndemCo, LP
Jackson Walker, LLP
Randy King

Charles Kingswell-Smith
Laramie Energy II, LLC
LLOG Exploration Company, LLC
Manti Resources Inc.
Oceaneering International, Inc.
OGX Resources LLC
Phoenix Exploration Company
Schlumberger
Tudor, Pickering, Holt & Co.

Ark-La-Tex Energy Partners LLC
Cawley, Gillespie & Assoc.
CAZ Investments
Complete Production Serivces, Inc.
Continental Airlines
Core Minerals
Eagle Rock Energy Partners, LP

Geophysical Pursuit, Inc.
Grenadier Energy Partners
Lone Star Land & Energy LLC
Rea & Associates
Savant Resources LLC
Sierra Resources, LLC
Triad Energy Corporation