| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Daube Company The | Ardmore, OK 73401 | Oil & Gas Operator | Jul 2025 |
| 2 | Davis Bobby J | Upton, WY 82730 | Oil & Gas Operator | Oct 1989 |
| 3 | Davis Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 1988 |
| 4 | DCD Inc | Gillette, WY 82716 | Oil & Gas Operator | Aug 2003 |
| 5 | Decalta International Corp | Denver, CO 80202 | Oil & Gas Operator | Mar 2015 |
| 6 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 7 | Diamond B Industries Inc | Belle Fourche, SD 57717 | Oil & Gas Operator | Apr 2010 |
| 8 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 9 | Duncan Oil Inc | Denver, CO 80210 | Oil & Gas Operator | Jun 2016 |