| 1 | S N D Energy Company, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Dec 2024 |
| 2 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2024 |
| 3 | Salida Exploration, LLC | Abilene, TX 79603 | Oil & Gas Operator | Dec 2024 |
| 4 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 5 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 6 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
| 7 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2024 |
| 8 | Sauder Management Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2024 |
| 9 | Schalk Oil Company, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2024 |
| 10 | Schkade Bros. Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2021 |
| 11 | Seelye, William L. | Plano, TX 75024 | Oil & Gas Operator | Oct 2005 |
| 12 | Shelby Production, Inc. | Kilgore, TX 75663 | Gas Operator | Dec 2024 |
| 13 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 14 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 15 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Sep 2024 |
| 16 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Dec 2024 |
| 17 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Dec 2024 |
| 18 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 19 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 20 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Dec 2024 |
| 21 | Staley, Jack C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 22 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Dec 2024 |
| 23 | Stelzer, J. C. | Post, TX 79356 | Oil & Gas Operator | Dec 1995 |
| 24 | Stephens, Clayton E. | Dallas, TX 75229 | Oil & Gas Operator | Nov 2011 |
| 25 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 26 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 27 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 28 | Sunlight Exploration, Inc. | Canyon, TX 79015 | Oil & Gas Operator | Dec 2024 |