| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Oct 2025 |
| 2 | D & J Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Oct 2025 |
| 3 | Dehart Company (The) | Ardmore, OK 73402 | Oil & Gas Operator | Jul 2025 |
| 4 | Delta D Operations | Wilson, OK 73463 | Oil & Gas Operator | Jul 2014 |
| 5 | Delta D Operations Inc | Ardmore, OK 73401-8678 | Oil & Gas Operator | Apr 2014 |
| 6 | Dennis & Davis Oil Co. | Nocona, TX 76255 | Oil & Gas Operator | Oct 2025 |
| 7 | Dennis Don Oil Company | Grady, OK 73569-9998 | Oil Operator | Jan 2002 |
| 8 | Depco Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 9 | Dorfs Drilling Company | Waurika, OK 73573 | Oil & Gas Operator | Nov 2024 |