| 1 | S & H Resources | Abilene, TX 79605 | Oil & Gas Operator | Mar 2025 |
| 2 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 3 | S & V Operating | Zephyr, TX 76890 | Oil & Gas Operator | Mar 2025 |
| 4 | S. P. Penntex Energy, L.P. | Abilene, TX 79605 | Oil & Gas Operator | May 2003 |
| 5 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 6 | Sabre Oil And Gas Corp. | Houston, TX 77063 | Oil & Gas Operator | Mar 2025 |
| 7 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 8 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
| 9 | San Angelo Cetco, Inc. | San Angelo, TX 76901 | Oil & Gas Operator | Mar 1998 |
| 10 | Santa Anna Operating 3, LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2025 |
| 11 | Santa Anna Operating Co I, LLC | Abilene, TX 79608 | Oil & Gas Operator | Oct 2018 |
| 12 | Savannah Ross And Company, LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 13 | Schkade Bros. Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2021 |
| 14 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Mar 2025 |
| 15 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 16 | Scranton Exploration | Eastland, TX 76448 | Oil & Gas Operator | Mar 2025 |
| 17 | Scully And Smith Oil Corporation | Salado, TX 76571 | Oil & Gas Operator | Feb 1995 |
| 18 | Scully Energy Corporation | Salado, TX 76571 | Oil & Gas Operator | Mar 2012 |
| 19 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 20 | Sequoia Energy Resources | Dallas, TX 75207 | Oil & Gas Operator | Mar 2025 |
| 21 | Sequoia Fossil Fuels, Inc. | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 22 | Service Clearing Corp. | Dallas, TX 75229 | Oil & Gas Operator | Mar 2025 |
| 23 | Seven Cross Operating, LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2025 |
| 24 | Sha Stephens, Incorporated | Weatherford, TX 76087 | Oil & Gas Operator | Apr 2006 |
| 25 | Shady Oil Co. | Brownwood, TX 76801 | Oil & Gas Operator | Mar 2025 |
| 26 | Shelby, Michael H. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2025 |
| 27 | Shield Operating Co. | Georgetown, TX 78627 | Oil & Gas Operator | Aug 2003 |
| 28 | Shifflett Operating Company | Snyder, TX 79550 | Oil & Gas Operator | Mar 2025 |
| 29 | Shiloh Oil Company LLC | Williston, FL 32696 | Oil & Gas Operator | Mar 2025 |
| 30 | Shoshone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | May 1994 |
| 31 | Shumate, Jess | Brookesmith, TX 76827 | Oil Operator | Jun 2006 |
| 32 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 33 | Sims, John S. | Lawn, TX 79530 | Oil & Gas Operator | Aug 2003 |
| 34 | Sinclair Exploration Company | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 35 | Smalley, Bill | Albany, TX 76430 | Oil & Gas Operator | Jul 2001 |
| 36 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 37 | Smith, Donnie D. | Coleman, TX 76834 | Gas Operator | Oct 2017 |
| 38 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 39 | Southern Exploration, Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Aug 2023 |
| 40 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 41 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Mar 2025 |
| 42 | Spartan Oil Corporation | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 43 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 44 | SRV Oil Co | Coleman, TX 76834 | Oil Operator | Mar 2025 |
| 45 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 46 | Standard Oil Tools, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Mar 2025 |
| 47 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Mar 2025 |
| 48 | Stasney, H. R. & Sons, LTD. | Albany, TX 76430 | Oil & Gas Operator | Mar 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 | Mar 2025 |
| 51 | Stewardship Resources | Roanoke, TX 76262 | Oil & Gas Operator | Jun 2022 |
| 52 | Stivers Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 1995 |
| 53 | Stonegate Operators, Inc. | Addison, TX 75001 | Oil Operator | Mar 2025 |
| 54 | Strawn Partners Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 55 | Stubblefield Energy Company | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 56 | Sub Surface Operations | Brownwood, TX 76804 | Oil & Gas Operator | Mar 2025 |
| 57 | Subsurface Energy Corp. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2025 |
| 58 | Subsurface Exploration | Coleman, TX 76834 | Oil & Gas Operator | Apr 2006 |
| 59 | Subsurface Production, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2025 |
| 60 | Sun-Key Oil Co., Inc. | Dublin, TX 76446 | Oil & Gas Operator | Mar 2025 |
| 61 | Supreme Energy Company, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2025 |
| 62 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2025 |