| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D. W. Elliott Operating Acct | Oil & Gas Operator | Dec 1991 | |
| 2 | Davis Davis & Davis | Oil & Gas Operator | Dec 1988 | |
| 3 | DBF Partners | Oil Operator | Dec 1986 | |
| 4 | DLM Ventures | Oil & Gas Operator | Dec 2004 | |
| 5 | DLM Ventures LLC | Oil & Gas Operator | Dec 2004 | |
| 6 | Douglas Whitney | Oil Operator | Dec 2004 |