| 1 | A.D. Operating | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 2 | Ada Exploration | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 3 | Afe Oil & Gas Consultants | Addison, TX 75001 | Gas Operator | Jan 2003 |
| 4 | Akers & Fultz, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2003 |
| 5 | Akers, B. F. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 6 | Akins Oil Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2025 |
| 7 | Alcorn, Jerry D. | Grand Prairie, TX 75050 | Oil & Gas Operator | Oct 2025 |
| 8 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 9 | Allied Energy Operating, LLC | McKinney, TX 75071 | Oil Operator | Oct 2025 |
| 10 | Alpine Petroleum | Abilene, TX 79608 | Oil & Gas Operator | Jul 2018 |
| 11 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Oct 2025 |
| 12 | Amen Oil LLC | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 13 | American Eagle Operating LLC | Gainesville, TX 76240 | Oil Operator | Oct 2025 |
| 14 | Ameritech Oil & Gas Corporation | Dallas, TX 75248 | Oil & Gas Operator | May 1996 |
| 15 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 16 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 17 | Anchor Petroleum, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Jan 1996 |
| 18 | Anco Account | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 1995 |
| 19 | Anderson, Carl T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2014 |
| 20 | Anderson, E D | Cisco, TX 76437 | Oil & Gas Operator | Nov 2009 |
| 21 | Andrew, Robert Oneal | Olney, TX 76374 | Oil & Gas Operator | Sep 1998 |
| 22 | Andrews, B. C. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 23 | Antle Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 24 | Antle, E. | Graham, TX 76450 | Oil & Gas Operator | Oct 1994 |
| 25 | Aogp, LLC | Turtle Lake, WI 54889 | Oil & Gas Operator | Sep 2019 |
| 26 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 27 | Argosy | Carrollton, TX 75010 | Oil & Gas Operator | Aug 2003 |
| 28 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 29 | Arnot, W. G., Jr. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2017 |
| 30 | Arrowhead Exploration Company | Olney, TX 76374 | Oil Operator | Dec 1995 |
| 31 | Arrowhead Productions, LP | Fort Worth, TX 76109 | Oil & Gas Operator | Oct 2025 |
| 32 | Aruba Petroleum, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Jun 2025 |
| 33 | Ashtola Exploration Company,Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Oct 2025 |
| 34 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 35 | Atwell, David L. | Duncan, OK 73533 | Oil & Gas Operator | Jul 2003 |
| 36 | Augustus Oil And Gas Corporation | Austin, TX 78731 | Oil & Gas Operator | Oct 2025 |
| 37 | Aurora Exploration & Prod Co | Whitesboro, TX 76273 | Oil Operator | Oct 2025 |
| 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 | Oct 2025 |
| 40 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 41 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |
| 42 | Aztec Drilling & Operating, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2015 |