| 1 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 2 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 3 | S2 Oil, LLC (1) | Albany, TX 76430 | Oil Operator | Jun 2026 |
| 4 | Sabre Oil And Gas Corp. | Houston, TX 77063 | Oil & Gas Operator | Jun 2026 |
| 5 | Safari Resources, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 6 | Salty Lime Energy, LLC | Ovalo, TX 79541 | Oil Operator | Jun 2026 |
| 7 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 8 | Savannah Ross And Company, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 9 | SBG Resources Group LLC | Frisco, TX 75035 | Oil Operator | Jun 2026 |
| 10 | Schkade Bros. Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2021 |
| 11 | Scott Oil Company | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2011 |
| 12 | Scott Operating, Inc. | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 13 | Senkel, Wesley, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2007 |
| 14 | Sha Stephens, Incorporated | Weatherford, TX 76087 | Oil & Gas Operator | Apr 2006 |
| 15 | Shack, Bill | Albany, TX 76430 | Oil & Gas Operator | Apr 2006 |
| 16 | Shadawn Corporation | Wichita Falls, TX 76310 | Oil & Gas Operator | Mar 2005 |
| 17 | Shamrock Minerals Corporation | Merkel, TX 79536 | Oil & Gas Operator | Nov 1998 |
| 18 | Shanks, Bob | Haskell, OK 74436 | Oil Operator | Sep 2002 |
| 19 | Sharp Image Energy, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Jun 2026 |
| 20 | Sheets Exploration Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2016 |
| 21 | Sheets, P. A. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 1994 |
| 22 | Shelco | Maysville, MO 64469 | Oil & Gas Operator | May 2021 |
| 23 | Sierra Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2008 |
| 24 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Jun 2026 |
| 25 | Smith, W. Don | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2001 |
| 26 | So Operating Company | Cisco, TX 76437 | Oil & Gas Operator | Jun 2026 |
| 27 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Jun 2026 |
| 28 | Soldier Creek Energy, LLC | Edmond, OK 73013 | Oil & Gas Operator | Jun 2026 |
| 29 | Southeastern Resources Corp. | Mansfield, TX 76063 | Oil & Gas Operator | Feb 2004 |
| 30 | Southern Alliance Oil Corp. | Grapevine, TX 76099 | Oil & Gas Operator | Jun 2026 |
| 31 | Southern Mineral Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2001 |
| 32 | Southlake Exploration, Inc. | Southlake, TX 76092 | Oil & Gas Operator | Jun 2026 |
| 33 | Spade Energy L.L.C. | Fort Worth, TX 76177 | Oil & Gas Operator | Jun 2026 |
| 34 | Spartan Oil Corporation | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 35 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2026 |
| 36 | Spence Energy Company | Dallas, TX 75360 | Oil & Gas Operator | Jun 2026 |
| 37 | Spitfire Partners, LLC | Dallas, TX 75225 | Oil Operator | Jun 2026 |
| 38 | Squyres Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 39 | Stamper Operating Co., Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jun 2026 |
| 40 | Stasney Well Service, LLC | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 41 | Steinberger, Gerald | Windthorst, TX 76389 | Oil & Gas Operator | Sep 2007 |
| 42 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2026 |
| 43 | Stewart, James G. | Graham, TX 76450 | Oil & Gas Operator | Sep 2019 |
| 44 | Stovall Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 45 | Strawn DRLG. Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2005 |
| 46 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 47 | Street, Spencer B., Jr. | Graham, TX 76450 | Oil & Gas Operator | Mar 1998 |
| 48 | Stubblefield Energy Company | Abilene, TX 79606 | Oil & Gas Operator | Jun 2026 |
| 49 | Subsea Operating Co. | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 50 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 51 | Sunday Corporation | Olney, TX 76374 | Oil & Gas Operator | Jun 2026 |
| 52 | Supreme Energy Company, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2026 |
| 53 | Susanna Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 54 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Jun 2026 |
| 55 | Synergy Operating Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Apr 2026 |