| 1 | D90 Energy, LLC | Austin, TX 78746 | Oil & Gas Operator | Nov 2024 |
| 2 | Daniel Mineral Development, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2010 |
| 3 | Daniel, Freeman | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2024 |
| 4 | Daniel, Richard | | Oil & Gas Operator | Feb 2024 |
| 5 | Davis, Wilbur Oil Production Company | Junction City, AR 71749 | Oil Operator | Jul 2024 |
| 6 | Days Creek Operating Company Inc | Texarkana, AR 71854 | Oil & Gas Operator | Feb 2024 |
| 7 | Delone, M S | El Dorado, AR 71730 | Oil & Gas Operator | Jun 2024 |
| 8 | Dennis & Eckhardt Management, LLC | Oklahoma City, OK 73118 | Gas Operator | Apr 2024 |
| 9 | Dews Production LLC | Magnolia, AR 71753 | Oil & Gas Operator | Jun 2024 |
| 10 | Dews, Dossie | Magnolia, AR 71753 | Oil & Gas Operator | Jun 2024 |
| 11 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 12 | DR Oil Company Limited Partnership | | Oil Operator | Apr 2012 |
| 13 | Drake Operating Company, LLC | El Dorado, AR 71730 | Oil Operator | Mar 2024 |
| 14 | Drenco Oil & Gas, Inc | | Oil Operator | Jul 2024 |