| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D & D Exploration Co. | Oil & Gas Operator | Nov 1986 | |
| 2 | Debbie Carroll | Oil & Gas Operator | Apr 1999 | |
| 3 | Delta Expl.& Development Corp. | Oil & Gas Operator | Jan 2025 | |
| 4 | Delta Operating Company | Oil Operator | Mar 1987 | |
| 5 | Delta Petroleum Inc | Houston, TX 77269-1007 | Oil & Gas Operator | May 2009 |
| 6 | Delta Production Services, LLC | Oil & Gas Operator | Aug 2002 | |
| 7 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 8 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |