| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D90 Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 2 | Dakota Crude, Inc. | Oil & Gas Operator | Oct 2025 | |
| 3 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Dec 2025 |
| 4 | Depco Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 5 | Devon Energy Williston, L.L.C | Oklahoma City, OK 73102-8260 | Oil & Gas Operator | Sep 2025 |
| 6 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 7 | Donald C. Slawson | Oil Operator | Jun 1985 |