| 1 | A & B Minerals | Scotland, TX 76379 | Oil & Gas Operator | Sep 2020 |
| 2 | A A Production Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 3 | Abb Oil Co., Inc. | Wichita Falls, TX 76310 | Oil & Gas Operator | Feb 2026 |
| 4 | Acadia Oil, LLC | Wichita Falls, TX 76310 | Oil Operator | Feb 2026 |
| 5 | Ada Exploration | Olney, TX 76374 | Oil & Gas Operator | Feb 2026 |
| 6 | Adair Resources Inc. | Ennis, TX 75120 | Oil & Gas Operator | Apr 2018 |
| 7 | Addax Operating, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 8 | Addison - Graves, L.L.C. | Archer City, TX 76351 | Oil Operator | Feb 2026 |
| 9 | Addison, Kenneth | Archer City, TX 76351 | Oil & Gas Operator | Dec 2017 |
| 10 | Akea, Inc. | Holliday, TX 76366 | Oil Operator | Feb 2026 |
| 11 | Akins Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 12 | Alamosa Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 13 | Alco Oil & Gas Co. LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 14 | Alcorn, Jerry D. | Grand Prairie, TX 75050 | Oil & Gas Operator | Feb 2026 |
| 15 | Alexander, Stanley | Electra, TX 76360 | Oil & Gas Operator | May 2016 |
| 16 | Alpha Exploration Co. | Wichita Falls, TX 76309 | Oil & Gas Operator | Oct 1998 |
| 17 | Altex Resources, Inc. | Carney, OK 74832 | Oil & Gas Operator | Mar 2015 |
| 18 | Amen Oil LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 19 | American Eagle Operating LLC | Gainesville, TX 76240 | Oil Operator | Feb 2026 |
| 20 | American Petroleum Corp | Addison, TX 75001 | Oil & Gas Operator | Feb 2026 |
| 21 | American West Resources, Inc | Fort Worth, TX 76161 | Oil & Gas Operator | Feb 2026 |
| 22 | Anchor Petroleum, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Jan 1996 |
| 23 | Anderson Oil & Gas Account | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2013 |
| 24 | Anderson, Carl T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2014 |
| 25 | Andrews, B. C. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 26 | Antle Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 27 | Apache Production Company | Holliday, TX 76366 | Oil & Gas Operator | Feb 2026 |
| 28 | Archer Drilling & Prod. Co. | Archer City, TX 76351 | Oil & Gas Operator | Nov 2002 |
| 29 | Arcooil Corp | San Antonio, TX 78205 | Oil & Gas Operator | Feb 2026 |
| 30 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 31 | Armour, Widd | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 32 | Arrowhead Exploration Company | Olney, TX 76374 | Oil Operator | Dec 1995 |
| 33 | Aruba Petroleum, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Nov 2025 |
| 34 | Associated Operating & Explor. | Dallas, TX 75243 | Oil & Gas Operator | Feb 2026 |
| 35 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 36 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 37 | Atoka Operating, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Feb 2026 |
| 38 | Ausanka Oil Operations | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 39 | Austin Energy Operations, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Feb 2026 |
| 40 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 41 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2026 |
| 42 | Ayres, C. D. | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 2026 |
| 43 | Ayres, Joe D. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2004 |
| 44 | Aztec Energy, LLC | Wichita Falls, TX 76301 | Oil Operator | Feb 2026 |
| 45 | Aztec Oil & Gas Company "A" | Wichita Falls, TX 76309 | Oil & Gas Operator | Sep 2010 |