| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Davis, Robert W. | Richfield, KS 67953 | Gas Operator | Dec 2010 |
| 2 | Dawson Resources Inc | Franktown, CO 80116 | Oil & Gas Operator | Mar 2015 |
| 3 | DCP Midstream, LP | Denver, CO 80237 | Oil Operator | Nov 2006 |
| 4 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Aug 2025 |
| 5 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 6 | Dover Atwood Corporation | Massillon, OH 44646 | Oil & Gas Operator | Dec 2024 |