| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Dac Oil Corporation | Oil & Gas Operator | Dec 1985 | |
| 2 | Dalnor Corporation | Oil & Gas Operator | Nov 2010 | |
| 3 | Damson Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Mar 2005 |
| 4 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Oct 2025 |
| 5 | Drew Cornell, Inc. | Oil & Gas Operator | Jun 1992 | |
| 6 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 7 | Dynamic Exploration PTRS, LLC | Oil & Gas Operator | Nov 2024 | |
| 8 | Dynamic Exploration, Inc. | Oil & Gas Operator | Oct 2003 |