| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D & L Partnership | Rhome, TX 76078 | Oil Operator | May 1987 |
| 2 | D & T Company | Oil & Gas Operator | Jun 1983 | |
| 3 | D J Production | Pasadena, TX 77502 | Oil & Gas Operator | Mar 2025 |
| 4 | D. A. Milton | Oil & Gas Operator | Dec 2016 | |
| 5 | David Crow | Oil & Gas Operator | Nov 1985 | |
| 6 | David New Operating Co., Inc. | Oil & Gas Operator | Feb 1999 | |
| 7 | Davis & Kaiser Operating, Inc. | Oil Operator | May 2004 | |
| 8 | Day Town Operating, LLC | Oil & Gas Operator | Jan 2025 | |
| 9 | Deco | Kilgore, TX 75662 | Oil & Gas Operator | Jan 1999 |
| 10 | Deco Oil Co. | Oil Operator | Oct 2013 | |
| 11 | Delta Operating Company | Oil Operator | Mar 1987 | |
| 12 | Delta Petroleum Inc | Houston, TX 77269-1007 | Oil & Gas Operator | May 2009 |
| 13 | Domestic Energy Corporation | Oil Operator | Jan 1988 | |
| 14 | Domestic Oil Producers,Inc. | Oil Operator | Oct 1998 | |
| 15 | Don G. Wiley, Jr. | Oil Operator | Dec 1979 | |
| 16 | Donnie R. Morrow | Oil Operator | Dec 2024 | |
| 17 | Doran And Braddock | Oil & Gas Operator | Nov 1984 |