| 1 | S & H Resources | Abilene, TX 79605 | Oil & Gas Operator | Oct 2025 |
| 2 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 3 | S & R Operating | Merkel, TX 79536 | Oil & Gas Operator | Mar 2008 |
| 4 | S M K Energy Corporation | Corpus Chrsti, TX 78475 | Oil & Gas Operator | Oct 2025 |
| 5 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 6 | S.U.E. Company | Abilene, TX 79604 | Oil Operator | Jan 1998 |
| 7 | Sabre Oil And Gas Corp. | Houston, TX 77063 | Oil & Gas Operator | Oct 2025 |
| 8 | Salida Exploration, LLC | Abilene, TX 79603 | Oil & Gas Operator | Oct 2025 |
| 9 | Saling Oil Co. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2002 |
| 10 | Salty Lime Energy, LLC | Ovalo, TX 79541 | Oil Operator | Oct 2025 |
| 11 | Sanders Energy LLC | Aledo, TX 76008 | Oil & Gas Operator | Oct 2025 |
| 12 | Schkade Bros. Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2021 |
| 13 | Schkade Production Co. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2020 |
| 14 | Scott Operating, Inc. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 15 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 16 | Seago Operating Co., L.L.C. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2011 |
| 17 | Sequoia Fossil Fuels, Inc. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 18 | Ser E&P, Inc. | McKinney, TX 75069 | Oil & Gas Operator | Oct 2025 |
| 19 | Seven Cross Operating, LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Oct 2025 |
| 20 | Seven Wells Oil & Gas Expl. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2014 |
| 21 | Sha-Jam Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 22 | Shady Oil Co. | Brownwood, TX 76801 | Oil & Gas Operator | Oct 2025 |
| 23 | Shamrock Minerals Corporation | Merkel, TX 79536 | Oil & Gas Operator | Nov 1998 |
| 24 | Shenandoah Oil, Inc. (I) | Midland, TX 79710 | Oil & Gas Operator | Apr 1996 |
| 25 | Shifflett Operating Company | Snyder, TX 79550 | Oil & Gas Operator | Oct 2025 |
| 26 | SHL Operating | Lubbock, TX 79416 | Oil & Gas Operator | Oct 2025 |
| 27 | Shoshone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | May 1994 |
| 28 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 29 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Oct 2025 |
| 30 | Sims, John S. | Lawn, TX 79530 | Oil & Gas Operator | Aug 2003 |
| 31 | Six Oil Producers | Abilene, TX 79601 | Oil & Gas Operator | Sep 2002 |
| 32 | Smalley, Bill | Albany, TX 76430 | Oil & Gas Operator | Jul 2001 |
| 33 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 34 | Smith Production Inc. | The Woodlands, TX 77381 | Oil & Gas Operator | Oct 2025 |
| 35 | Snyder Drilling Corp. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 36 | Socorro Exploration, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Oct 2025 |
| 37 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 38 | Solar Exploration TX LLC | Tulsa, OK 74133 | Oil Operator | Dec 2018 |
| 39 | Southern Crude, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2017 |
| 40 | Southern Exploration, Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Aug 2023 |
| 41 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 42 | Spartan Oil Corporation | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 43 | Spence Energy Company | Dallas, TX 75360 | Oil & Gas Operator | Oct 2025 |
| 44 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2025 |
| 45 | Sportsman Oil, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Nov 1998 |
| 46 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 47 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Oct 2025 |
| 48 | Startex Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 49 | Stearns Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 1993 |
| 50 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 51 | Stephens, Hayseed Oil Inc. | Weatherford, TX 76087 | Oil & Gas Operator | Mar 2008 |
| 52 | Stetson Petroleum Corp. | Rollins, MT 59931 | Oil & Gas Operator | Oct 2025 |
| 53 | Stober Oil And Gas Services, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 54 | Stoneburner Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1997 |
| 55 | Strawn Operating Co., L.L.C. | El Paso, TX 79912 | Oil Operator | Oct 2025 |
| 56 | Stryker Energy Corp. | Mesquite, TX 75180 | Oil & Gas Operator | Oct 2025 |
| 57 | Stubblefield Energy Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 58 | Subsurface Production, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Oct 2025 |
| 59 | Sunbelt Salvage | Eastland, TX 76448 | Oil & Gas Operator | Sep 1998 |
| 60 | Sundance Consulting Corp. | Abilene, TX 79605 | Oil & Gas Operator | Oct 2025 |
| 61 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 62 | Sunwest Oklahoma, Inc | Dallas, TX 75231 | Oil & Gas Operator | May 2023 |
| 63 | Supreme Energy Company, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Oct 2025 |
| 64 | Susanna Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 65 | Sweet Texas T Energy LLC | Clyde, TX 79510 | Oil Operator | Oct 2025 |
| 66 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |