| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 2 | D-Bar Leasing, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2022 |
| 3 | D. A. B. Oil Service, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2012 |
| 4 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | Sep 2026 |
| 5 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Sep 2026 |
| 6 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 7 | Dahab Energy Inc. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2026 |
| 8 | Dalf Energy LLC | Pampa, TX 79066 | Oil & Gas Operator | Sep 2026 |
| 9 | Dallas Operating Corp. | Dallas, TX 75205 | Oil & Gas Operator | Nov 2006 |
| 10 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 11 | Dara Explorations, LLC | Albany, TX 76430 | Oil Operator | Sep 2026 |
| 12 | Dark Canyon Resources LLC | Refugio, TX 78377 | Oil Operator | Sep 2026 |
| 13 | Davis Enterprises | Abilene, TX 79608 | Oil & Gas Operator | Aug 1998 |
| 14 | Davis, Sammy | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 15 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Sep 2026 |
| 16 | DBC Operating Company LLC | Midlothian, TX 76065 | Oil & Gas Operator | Sep 2026 |
| 17 | DCS Energy | Throckmorton, TX 76483 | Oil Operator | Sep 2026 |
| 18 | Deen Drilling Company | Archer City, TX 76351 | Oil & Gas Operator | Sep 2026 |
| 19 | Deep Gully Oil LLC | Houston, TX 77292 | Oil Operator | Sep 2026 |
| 20 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2026 |
| 21 | Delta Oil & Gas Company | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2003 |
| 22 | Delta Oil & Gas LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 23 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 24 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 25 | DH Operating, Inc. | Gordon, TX 76453 | Oil & Gas Operator | Sep 2026 |
| 26 | DH Production | Albany, TX 76430 | Oil Operator | Dec 2005 |
| 27 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Sep 2026 |
| 28 | Dino Operating LLC | Throckmorton, TX 76483 | Oil Operator | Sep 2026 |
| 29 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Sep 2026 |
| 30 | DJM Beasley Well Service | Tuscola, TX 79562 | Oil Operator | Sep 2026 |
| 31 | Double C Operating LLC | Abilene, TX 79602 | Oil Operator | Sep 2026 |
| 32 | Dove Mineral | Abilene, TX 79601 | Oil & Gas Operator | Dec 2010 |
| 33 | Dragoon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | May 2015 |
| 34 | DRH Properties LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 35 | Drum, Delton | Liberty, TX 77575 | Oil & Gas Operator | Jul 2005 |
| 36 | Durango Operating Co., Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2002 |
| 37 | Dynamic Production, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |