| 1 | A & D Exploration Company | Rockport, TX 78381 | Oil & Gas Operator | Oct 2025 |
| 2 | A.O.E. Operators, Inc. | Fulshear, TX 77441 | Oil & Gas Operator | Oct 2025 |
| 3 | Abaco Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 4 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 5 | Ac Exploration, LLC | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 6 | Acock Operating Limited | San Antonio, TX 78270 | Oil & Gas Operator | Oct 2025 |
| 7 | Acock/Anaqua Operating Co., LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 8 | Activa Resources, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2008 |
| 9 | Aegis Fluids Management, LLC | Plano, TX 75093 | Oil & Gas Operator | Oct 2025 |
| 10 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 11 | Alcorn Prod Co. | Victoria, TX 77902 | Oil & Gas Operator | Mar 1997 |
| 12 | Alltex Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 13 | Alpine Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 14 | Amend Energy Company | Houston, TX 77227 | Oil & Gas Operator | Apr 2002 |
| 15 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 16 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 17 | American Int'L Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 18 | American Pumping & Trucking | New Braunfels, TX 78131 | Oil & Gas Operator | Oct 2025 |
| 19 | American Shoreline, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 20 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |
| 21 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 22 | Anaqua Oil & Gas, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2008 |
| 23 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 24 | Apex Energy, Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Oct 2025 |
| 25 | Aransas DRLG & Workover Co Inc | Corpus Chrsti, TX 78409 | Oil & Gas Operator | Jul 2019 |
| 26 | Araxas Exploration, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 1998 |
| 27 | Arcadia Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Oct 2025 |
| 28 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Oct 2025 |
| 29 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 30 | Arcturus Operating Company | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 31 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 32 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 33 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 34 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 35 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 36 | Atkinson Energy Corporation | Giddings, TX 78942 | Oil & Gas Operator | Jan 2010 |
| 37 | Atlantis Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Oct 2025 |
| 38 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 39 | Auburn Enterprises, Inc. | Kyle, TX 78640 | Oil & Gas Operator | Aug 2003 |
| 40 | Aurora Resources Corporation | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 41 | Austin Resources Corporation | Houston, TX 77027 | Oil & Gas Operator | Mar 2008 |
| 42 | Austin Resources Oper Company | Houston, TX 77019 | Gas Operator | Mar 1999 |
| 43 | Awp Operating Company | George West, TX 78022 | Oil & Gas Operator | Oct 2025 |