| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 2 | Delta Exploration Company Inc | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 3 | Denman-Friesen Co. | Lufkin, TX 75901 | Oil & Gas Operator | Nov 2006 |
| 4 | Denovo Oil & Gas, Inc. | Houston, TX 77210 | Oil & Gas Operator | May 1995 |
| 5 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 6 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 7 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |