| 1 | Barbee, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 2 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 3 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 4 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Oct 2025 |
| 5 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Sep 2026 |
| 6 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 7 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 8 | Enre Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2005 |
| 9 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | May 2026 |
| 10 | Great Western Drilling Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 11 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 12 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 13 | J.P. Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 14 | La Roca Energy, LP | Dallas, TX 75207 | Oil & Gas Operator | May 2024 |
| 15 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 16 | Larance Engineering Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jan 1996 |
| 17 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2026 |
| 18 | Mineral Development, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1996 |
| 19 | Mortimer Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2003 |
| 20 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 21 | Oakridge Oil And Gas, LP | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2026 |
| 22 | Outline Oil Corp. | San Antonio, TX 78217 | Oil & Gas Operator | Sep 2026 |
| 23 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 24 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 25 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 26 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2026 |
| 27 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 28 | Spitfire Partners, LLC | Dallas, TX 75225 | Oil Operator | Sep 2026 |
| 29 | Tsar Energy, LLC | Dallas, TX 75209 | Oil & Gas Operator | Sep 2026 |
| 30 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 31 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Jun 2026 |
| 32 | Whitehead Prod. Co., Inc. | Humble, TX 77338 | Oil & Gas Operator | May 2026 |