| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Davis Asset Management, Inc. | Houston, TX 77010 | Oil & Gas Operator | Dec 2004 |
| 2 | Davis Oil Company | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 2018 |
| 3 | Delta Operating Corporation | Oil & Gas Operator | Dec 2023 | |
| 4 | Denbury Management, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Dec 1999 |
| 5 | Drew Cornell, Inc.-Agent | Oil & Gas Operator | Sep 1990 | |
| 6 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 7 | Dune Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Jun 2016 |