| 1 | Abb Oil Co., Inc. | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2026 |
| 2 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2026 |
| 3 | Acadia Oil, LLC | Wichita Falls, TX 76310 | Oil Operator | Apr 2026 |
| 4 | Acoma Oil Corporation | Saint Paul, MN 55102 | Oil & Gas Operator | Apr 2026 |
| 5 | Adair Resources Inc. | Ennis, TX 75120 | Oil & Gas Operator | Apr 2018 |
| 6 | Addax Operating, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 7 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 8 | Aeternum Energy, LLC | Tyler, TX 75713 | Oil & Gas Operator | Apr 2026 |
| 9 | Akins Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2026 |
| 10 | Allen, C. L. (Doie) | Wichita Falls, TX 76309 | Oil & Gas Operator | Apr 2026 |
| 11 | Alpha Exploration Co. | Wichita Falls, TX 76309 | Oil & Gas Operator | Oct 1998 |
| 12 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 13 | Apc Operating Partnership | Tulsa, OK 74136 | Oil & Gas Operator | Oct 1996 |
| 14 | Apex Operating & Equip. Co. | Bowie, TX 76230 | Oil & Gas Operator | Nov 2003 |
| 15 | Arch Operating, LLC | Wichita Falls, TX 76307 | Oil Operator | Apr 2026 |
| 16 | Archer Reef Oil Co. | Bellevue, TX 76228 | Oil & Gas Operator | Apr 2026 |
| 17 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2009 |
| 18 | Aries Operating, LP | Houston, TX 77042 | Oil & Gas Operator | Apr 2026 |
| 19 | Armour, Widd | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 20 | Arnot, W. G., Jr. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2017 |
| 21 | Aroc (Texas) Inc. | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 22 | Arrowhead Resources, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2026 |
| 23 | Ashtola Exploration Company,Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2026 |
| 24 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2026 |
| 25 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Apr 2026 |
| 26 | Atoka Energy LLC | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2026 |
| 27 | Atoka Operating, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2026 |
| 28 | Atwell, David L. | Duncan, OK 73533 | Oil & Gas Operator | Jul 2003 |
| 29 | Ausanka Oil Operations | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 30 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 31 | Ayres, C. D. | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2026 |
| 32 | Aztec Energy, LLC | Wichita Falls, TX 76301 | Oil Operator | Apr 2026 |
| 33 | Aztec Oil & Gas Company "A" | Wichita Falls, TX 76309 | Oil & Gas Operator | Sep 2010 |
| 34 | Azteca Petroleum, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2026 |