| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D. B. McClinton | Oil & Gas Operator | Jun 1992 | |
| 2 | Dalco Petroleum Inc | Oil & Gas Operator | Jan 2006 | |
| 3 | Davis Asset Management, Inc. | Houston, TX 77010 | Oil & Gas Operator | Dec 2004 |
| 4 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Dec 2025 |
| 5 | Deblin Oil & Gas, Inc | Oil & Gas Operator | Aug 1995 | |
| 6 | Delta Petroleum Corp Of Co | Oil & Gas Operator | Oct 2010 | |
| 7 | Dew Oil And Gas Co.,Inc. | Oil & Gas Operator | Dec 1989 | |
| 8 | Dow Chemical Co. | Oil & Gas Operator | Dec 1997 | |
| 9 | Dynamic Exploration, Inc. | Oil & Gas Operator | Oct 2003 |