S & B Operating LLC
S & C Construction, Inc.
S & H Oilfield Enterprises
S & K Oil Production, Inc.
S & S Oil Leasing
S & S Oil, L.L.C.
SAAW Operating LLC
Sabre Exploration, LLC
Sabre Operating, Inc.
SAG Oil Company LLC
Sage NR OK LLC
Sage Oil LLC
Sage, Larry George
Sagebrush Operating LLC
Salt Creek Resources, LLC
Samco Investments
Samedan Oil Corporation
Samson Resources Company
Samuel Gary Jr. & Associates, Inc.
Samuel Jackson Production Co
San Marco Petroleum, Inc.
Sand Point LLC
Sandlin Oil Corporation
SandRidge Exploration and Production LLC
Sanguine Gas Exploration, LLC
Satchell Creek Petroleum, LLC
Sauder Oil Co., LLC
Schaben Oil LLC
Schankie & Sons, LLC
Schankie Well Service, Inc.
Scheck Oil Operation
Scheibmeir, Daryl
Schierling, Eldon J.
Schindler Oil, LLC
Schindler, Joe
Schippers Oilfield Services, LLC
Schmeid Ranch, LLC
Schmidt, Terry D.
Schmidt, Tracy
Schulein Company LLC
Schulte Oil
Schulz Oil & Gas, Inc.
Scott Services LLC
Scott's Production, LLC
Scout Energy Management LLC
SCZ Resources, LLC
SDOCO, LLC
See Oil
Seeker, LLC
Seibert Oil, LLC
SEK Energy, LLC
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Serendipity Production Company LC
SH Oil Operations LLC
Shakespeare Oil Co., Inc.
Sharp, Robert L.
Shawmar Oil & Gas Co., Inc.
Sheedy Energy Production Company
Shelby Resources LLC
Shelley, Randall D.
Shelton, Robert
Shields Oil Producers Inc.
Sho-Bar Energy, Inc.
Shorts Production LLC
Sieg Energy, Inc.
Siemsen Operating, LLC
Sirius Energy Corp.
Siroky Oil Management
Six-D Exploration, LLC
Slawson Exploration Company, Inc.
Slawson, Donald C.
SLO Oil, LLC
Sloan Operations
SM Oil & Gas, Inc.
Smith Oil & Gas LLC
Smith Oil Co.
Smith Oil Operations
Smith, Darrin R
Smith, David
Smitherman, Leon C., Jr.
Snedco, Inc.
SNR Kansas Operating, LLC
SNR Operating, LLC
So & Jo, LLC
SO-I , a General Partnership
SoKan Operating, LLC
Somerset Energy Enterprises, LLC
Somerset Energy, Inc.
Sommer Oil LLC
Sonoma Resources LLC
Sorensen, Kim A.
Sotta, Donald E.
Soule, Richard A.
Southern Hills Gas Co.
Southwest Gas Storage Company
Southwind Petroleum Corp.
Specht, Brian L.
Speedy Well Service
Spess Oil Company, a General Partnership
Spiral Energy Corp
Splechter, Tim
Spradco, Inc.
Spring Creek Farm and Oil, LLC
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SPS, INC.
Ssouri Oil Ventures
St Johns Operating #1 LP
ST Petroleum, Inc.
Staab Energy & Leasing
Staab Oil Co., a General Partnership
Standard Operating Company
Standlee, Jacci L
Steckel Oil, LLC
Stecklein Oil Company, a General Partnership
Steffen Resource Development, LLC
Steinle Oil
Steinle, Martin D.
Stelbar Oil Corporation, Inc.
StepCo Oil, Inc.
Stephens & Johnson Operating Co.
Stewart Petroleum Corporation
Stewart Producers, Inc.
Stice Oil Company
Stone Oak Operating, LLC
Stonegate Ranch, LLC
Stoudt, Jean Marie
Strat Land Exploration Co
Strata Exploration, Inc.
StrataKan Exploration, LLC
Streamline Energy, LLC
Stripper Oil Co
Stroke of Luck Energy & Exploration LLC
Stuber, Virgil
Studer Oil Co.
Stull Oil LLC
Sublette Feeders LLC
Suemaur Exploration & Production, LLC
Suerte Oil & Gas LLC
Summit Operating LLC
Summitt Energy, LLC
Sundgren, Stephen E. and Jackie
Sundown Energy Inc.
Sunfire Energy
Sunflower Energy, LLC
Sunflower Exploration, LLC
Sunflower Well Service, Inc.
Sunswept Operating LLC
Super Oilwell Service
Superior Oilfield Services LLC
Supernova Energy, Inc.
Swenton, Michael J.
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