| 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.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 4 | S.U.E. Company | Abilene, TX 79604 | Oil Operator | Jan 1998 |
| 5 | Sabre Oil And Gas Corp. | Houston, TX 77063 | Oil & Gas Operator | Oct 2025 |
| 6 | Salida Exploration, LLC | Abilene, TX 79603 | Oil & Gas Operator | Oct 2025 |
| 7 | Sanders Energy LLC | Aledo, TX 76008 | Oil & Gas Operator | Oct 2025 |
| 8 | Sandstone Services, LLC | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 9 | Schiff, H. G. & Co. | Dallas, TX 75206 | Oil & Gas Operator | Jul 1993 |
| 10 | Schkade Bros. Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2021 |
| 11 | Schkade, Carl E. | Albany, TX 76430 | Oil & Gas Operator | Sep 2009 |
| 12 | Scope Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2003 |
| 13 | Scott Operating, Inc. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 14 | Scranton Exploration | Eastland, TX 76448 | Oil & Gas Operator | Oct 2025 |
| 15 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 16 | Seco Petroleum Corp | Houston, TX 77290 | Oil & Gas Operator | Jan 1997 |
| 17 | Sedona Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 18 | Sequoia Energy Resources | Dallas, TX 75207 | Oil & Gas Operator | Oct 2025 |
| 19 | Sequoia Fossil Fuels, Inc. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 20 | Sequoia Natural Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 21 | Seven Wells Oil & Gas Expl. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2014 |
| 22 | Shack, Bill | Albany, TX 76430 | Oil & Gas Operator | Apr 2006 |
| 23 | Shadawn Corporation | Wichita Falls, TX 76310 | Oil & Gas Operator | Mar 2005 |
| 24 | Shahan, Donald Allan | Abilene, TX 79602 | Oil Operator | Oct 2025 |
| 25 | Sheets Exploration Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2016 |
| 26 | Sheets, P. A. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 1994 |
| 27 | Sherman, L. B. | Early, TX 76803 | Oil & Gas Operator | Jun 1998 |
| 28 | Shoshone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | May 1994 |
| 29 | Simple Operating LLC | Cross Plains, TX 76443 | Oil Operator | Oct 2025 |
| 30 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 31 | Sims, John S. | Lawn, TX 79530 | Oil & Gas Operator | Aug 2003 |
| 32 | Singleton Investments, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2012 |
| 33 | Smalley, Bill | Albany, TX 76430 | Oil & Gas Operator | Jul 2001 |
| 34 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 35 | Smith, Joe T., Inc. | Hawley, TX 79525 | Oil & Gas Operator | Oct 2025 |
| 36 | Snyder Drilling Corp. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 37 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 38 | Southlake Exploration, Inc. | Southlake, TX 76092 | Oil & Gas Operator | Oct 2025 |
| 39 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Oct 2025 |
| 40 | Spartan Oil Corporation | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 41 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Oct 2025 |
| 42 | Spence Energy Company | Dallas, TX 75360 | Oil & Gas Operator | Oct 2025 |
| 43 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2025 |
| 44 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 45 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 46 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Oct 2025 |
| 47 | Startex Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 48 | Stealth, Inc. | Cross Plains, TX 76443 | Gas Operator | Mar 1997 |
| 49 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 50 | Stovall Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 51 | Stovall, Howard | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 52 | Stryker Energy Corp. | Mesquite, TX 75180 | Oil & Gas Operator | Oct 2025 |
| 53 | Sun-Key Oil Co., Inc. | Dublin, TX 76446 | Oil & Gas Operator | Oct 2025 |
| 54 | Sunray Energy, Inc. | Round Rock, TX 78683 | Oil & Gas Operator | Nov 2018 |
| 55 | Supreme Energy Company, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Oct 2025 |
| 56 | Susanna Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 57 | Sweet Texas T Energy LLC | Clyde, TX 79510 | Oil Operator | Oct 2025 |
| 58 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |