| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Davis, Edward Mike | Oil Operator | Dec 2011 | |
| 2 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 3 | Devon Energy Production Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2015 |
| 4 | Diamond Operating, Inc. | Oil & Gas Operator | Feb 2022 | |
| 5 | Diversified Operating Corporation | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |