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JM Exploration, LLC
Abraxas Petroleum Corporation
Activa Resources LLC
Alamo Energy, L.L.C.
Alamo Operating Company, L.C.
All American Oil & Gas
Ameristate Exploration, LLC
Ameritex Minerals, Inc.
AWP Operating Company
Bayshore Exploration, LLC
Benchmark Oil & Gas Company
Black Forest Energy, LLC
Bommer Engineering Company
BOSS Exploration & Production
Brigham Oil & Gas, L.P.
Bucaneer Energy
Burk Royalty Co.
C S V
Caliente Energy LP
Camden Resources, L.L.C.
Carrizo Oil & Gas, Inc
CB Energy, LLC
Chaparral Energy L.L.C.
Chesapeake Energy Corporation
Cimarex Energy Company
CMR Energy, L.P.
Cobia Oil & Gas
Continental Operating Co.
Crest Resources, Inc.
Croft Exploration
Dan A. Hughes Company
Denali Oil & Gas Management, LLC
Dynamic Production Inc.
Eagle Oil & Gas Co.
East Guadalupe Resources, LLC
Edwin M. Jones Oil Co.
Einex Energy
EnRe L.P.
Escarpment Energy, LLC
Firstrike Energy
Frazier Resources Company
Freedom Pipeline
Frost National Bank
Garrison Oil & Gas Ltd.
Gates Mineral Company, Ltd.
Genesis Gas & Oil LLC
Great Texas Crude, Inc.
Greehey & Company
Grey Wolf Drilling Company
Gulftex Energy
Howard A. Banks
Hurd Enterprises, Ltd.
Jensen Operating Company, Inc.
Jilpetco, Inc.
John H. White & Associates, Inc.
Kaler Energy Corporation
KEBO Oil & Gas, Inc.
Kerns Petroleum, Inc.
Kestrel Resources, Inc.
Killam Oil Company
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LaGrange
SWD, LLC
Lewis Energy
Lighthouse Exploration, Inc.
Loudon Operating Company, LLC
MacDiarmid Interests, Ltd
McCombs Energy, LLC
Metano Energy, L.P.
MLC Operating, L.P.
Mortimer Production Company
Nakoma Petroleum
New Millenium
Opex Energy, LLC
Osborn Heirs Co
Pearsall Operating Company
Power Petroleum
Premier Minerals, Inc.
Primavera Resources
Prime Operating Company
Pyr Energy Corp.
Reichmann Petroleum Corp.
Republic Resources, L.L.C.
Ricochet Energy, Inc.
Riverview Removables LC
RLU Oil & Gas
Rockport Georgetown Holdings, L.P.
Rosetta Resources
Safeco
Saxet Energy, Ltd.
Schoebaum, Curphy & Scanalan, P.C.
Sien Energy
Smith Production, Inc.
Sonora Resources, LP
South Texas Operating Company
Steve Thompson
Suemaur Exploration & Production, L.L.C.
SYJ Oil & Gas
T-C Oil Company
TAE Properties, Inc
Talon Development Company
Tejones Operating Company
Texas American Resources
Texas Petroleum Resources
Textron Energy, LLC
TNT Engineering, Inc.
Trio Consulting & Management, LLC
Valence Operating Company
Venus Exploration, Inc.
Veritas Energy, L.L.C.
Voyager
Welhausen Operating Company, L.P.
Wentworth Energy, Inc.
Whiting Oil & Gas Corporation
Whittier Energy Corporation
Will Drill Production Co., Inc.
Willo Oil & Gas Exploration
Winn Exploration Co., Inc.
XTO Energy
Zachry Exploration, Ltd.
ZEnergy Inc.
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