| 1 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 2 | S & V Operating | Zephyr, TX 76890 | Oil & Gas Operator | Apr 2026 |
| 3 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 4 | Sabre Oil And Gas Corp. | Houston, TX 77063 | Oil & Gas Operator | Apr 2026 |
| 5 | Sams Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 1998 |
| 6 | Saved By Grace Plugging, LLC | Tuscola, TX 79562 | Oil & Gas Operator | Dec 2018 |
| 7 | SBS Oil Company | Austin, TX 78749 | Oil & Gas Operator | Apr 2026 |
| 8 | Schkade Bros. Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2021 |
| 9 | Schkade Production Co. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2020 |
| 10 | Schkade, Carl E. | Albany, TX 76430 | Oil & Gas Operator | Sep 2009 |
| 11 | Schkade, Louis | Albany, TX 76430 | Oil & Gas Operator | Mar 2008 |
| 12 | Scope Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2003 |
| 13 | Scranton Exploration | Eastland, TX 76448 | Oil & Gas Operator | Apr 2026 |
| 14 | Selous Energy, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Jul 2015 |
| 15 | Sequoia Energy Resources | Dallas, TX 75207 | Oil & Gas Operator | Apr 2026 |
| 16 | Sequoia Fossil Fuels, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2026 |
| 17 | Sequoia Natural Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2026 |
| 18 | Serendipity Exploration, Inc. | Weatherford, TX 76087 | Gas Operator | May 1997 |
| 19 | Seven Cross Operating, LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Apr 2026 |
| 20 | Shaida, John H. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2026 |
| 21 | Sherman, L. B. | Early, TX 76803 | Oil & Gas Operator | Jun 1998 |
| 22 | Shoshone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | May 1994 |
| 23 | Sierra Oil Company | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2026 |
| 24 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2026 |
| 25 | Simpson Operating Services, LP | Ballinger, TX 76821 | Oil & Gas Operator | Apr 2026 |
| 26 | Sinclair Energy Corporation | Fort Worth, TX 76177 | Oil & Gas Operator | Apr 2026 |
| 27 | Skybridge Energy LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2026 |
| 28 | Sledge, H. G., Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2016 |
| 29 | Smalley, Bill | Albany, TX 76430 | Oil & Gas Operator | Jul 2001 |
| 30 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 31 | Snow Operating Co., Inc. | Haltom City, TX 76117 | Oil & Gas Operator | Feb 2024 |
| 32 | Snyder Drilling Corp. | Albany, TX 76430 | Oil & Gas Operator | Apr 2026 |
| 33 | So Operating Company | Cisco, TX 76437 | Oil & Gas Operator | Apr 2026 |
| 34 | Southeastern Resources Corp. | Mansfield, TX 76063 | Oil & Gas Operator | Feb 2004 |
| 35 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 2026 |
| 36 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2026 |
| 37 | Square One Energy, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Oct 2015 |
| 38 | Squyres Oil Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 39 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 40 | St Johns Operating #1 LP | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 41 | Stacha, Eddy A. | Rice, TX 75155 | Oil & Gas Operator | Apr 2026 |
| 42 | Star One Energy, Inc. | Fort Worth, TX 76163 | Oil & Gas Operator | May 2012 |
| 43 | Stasney, H. R. & Sons, LTD. | Albany, TX 76430 | Oil & Gas Operator | Apr 2026 |
| 44 | STB Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2008 |
| 45 | Stealth, Inc. | Cross Plains, TX 76443 | Gas Operator | Mar 1997 |
| 46 | Stellex | De Leon, TX 76444 | Oil & Gas Operator | Apr 2026 |
| 47 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 48 | Stephenson Oil & Gas, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Sep 1999 |
| 49 | Sterling Oil And Gas | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2026 |
| 50 | Stewart Family Holdings LLC | Weatherford, TX 76087 | Oil & Gas Operator | Apr 2026 |
| 51 | Stewart, James G. | Graham, TX 76450 | Oil & Gas Operator | Sep 2019 |
| 52 | Stober Oil And Gas Services, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2026 |
| 53 | Stovall, Howard | Cisco, TX 76437 | Oil & Gas Operator | Apr 2026 |
| 54 | Stowe Energy, Inc. | Vernon, TX 76384 | Oil & Gas Operator | Mar 2003 |
| 55 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 56 | Subsurface Energy Corp. | Coleman, TX 76834 | Oil & Gas Operator | Apr 2026 |
| 57 | Sun-Key Oil Co., Inc. | Dublin, TX 76446 | Oil & Gas Operator | Apr 2026 |
| 58 | Sunbelt Salvage | Eastland, TX 76448 | Oil & Gas Operator | Sep 1998 |
| 59 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 60 | Supreme Energy Company, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Apr 2026 |
| 61 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2026 |