LYNDE INVESTMENTS

MASSIF OIL & GAS II

MARATHON

NAVIGATION PETROLEUM

NORTHWOODS ENERGY

PEAK EXPLORATION AND PRODUCTION

OILDIGGER RESOURCES

PEREGRINE PETROLEUM PARTNERS

PHOENIX EXPLORATION GROUP, INC

PINE HAVEN RESOURCES

REBELLION ENERGY II

ROCKIES RESOURCES, LLC

ROSS ENGINEERING & DESIGN

SAMSON RESOURCES II

SIMONIS OIL OPERATING, LLC

TRIBUTE OIL & GAS

VOGEL LAW FIRM

WHITE ROCK OIL & GAS

XTO ENERGY

BALLARD PETROLEUM HOLDINGS

BALIDOR OIL & GAS

BONANZA CREEK

BURNETT OIL & GAS 

CENTURY OIL & GAS

CONOCOPHILLIPS

CONTINENTAL RESOURCES

EDU-MIND

ELEPHANT OIL & GAS

EMPIRE PETROLEUM

FOUNDATION ENERGY MANAGEMENT, LLC

GRAYSON MILL OPERATING

GRIZZLY NRG

HESS CORPORATION

HOWELL FAMILY TRUST

JKA, LLC

KAIROS/FINORIC

KELLER LAW FIRM, P.C.

KISSACK WATER & OIL SERVICE

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