| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Denver Energy Exploration,LLC | Canyon Lake, TX 78133 | Oil Operator | May 2024 |
| 2 | Dolberry Energy Resources Corp. | Dallas, TX 75252 | Oil Operator | May 2024 |
| 3 | Dominion Minerals Corporation | Houston, TX 77014 | Oil & Gas Operator | Nov 2009 |
| 4 | Domino Prod Services Inc | Bellville, TX 77418 | Oil & Gas Operator | Feb 2004 |
| 5 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | May 2024 |