| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Dalen Resources Oil & Gas Co | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 2 | Dekalb Energy Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 1996 |
| 3 | Delta Sierra Oil & Gas LLC | Gas Operator | Jan 2018 | |
| 4 | Depco Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |