| 1 | A.O.E. Operators, Inc. | Fulshear, TX 77441 | Oil & Gas Operator | Mar 2025 |
| 2 | Accidie Exploration And Dev.,Inc | Plano, TX 75023 | Oil & Gas Operator | Mar 2025 |
| 3 | Adobe Energy, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2004 |
| 4 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 5 | Albrecht, Phil A., Jr. | Victoria, TX 77901 | Oil & Gas Operator | Jun 2005 |
| 6 | Alexander, Herbert R. Inc. | Houma, LA 70360 | Oil & Gas Operator | Jun 1998 |
| 7 | Allegiant Resources, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Mar 2025 |
| 8 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 9 | Alta Mesa Services, LP | Houston, TX 77084 | Oil & Gas Operator | Mar 2025 |
| 10 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 11 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 12 | American Pumping & Trucking | New Braunfels, TX 78131 | Oil & Gas Operator | Mar 2025 |
| 13 | Anderson Oil LTD. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 14 | Angel Operating LLC | Metairie, LA 70033 | Oil Operator | Mar 2025 |
| 15 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 16 | API Operating Co. | Houston, TX 77036 | Oil & Gas Operator | Mar 2025 |
| 17 | Arbol Resources, Inc. | Houston, TX 77079 | Oil & Gas Operator | Mar 2025 |
| 18 | Aroc (Texas) Inc | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 19 | Atasca Resources Inc | Houston, TX 77219 | Oil & Gas Operator | Mar 2025 |
| 20 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 21 | Aurora Resources Corporation | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |