| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D. B. McConnell | Oil & Gas Operator | Oct 1991 | |
| 2 | D. I. Dupree | Oil & Gas Operator | Sep 2015 | |
| 3 | Danos Oil & Gas LLC | Oil & Gas Operator | Nov 2023 | |
| 4 | DCP Midstream, LLC | Oil Operator | Jun 2016 | |
| 5 | Don Webb | Oil Operator | Mar 1984 | |
| 6 | Dossie Dews | Oil & Gas Operator | Jan 2024 | |
| 7 | Dupree And Dupree | Oil Operator | Dec 1998 |