| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | DCP Midstream, LLC | Oil Operator | Jun 2016 | |
| 2 | Delhi Gas Pipeline Corporation | Palestine, TX 75802 | Oil & Gas Operator | Feb 1998 |
| 3 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
| 4 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2024 |
| 5 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 6 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 7 | Duke Energy Field Services LLC | Oil Operator | Dec 2006 |