| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Damar Resc Incor | Oil Operator | Oct 1995 | |
| 2 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Dec 2023 |
| 3 | Denis Roberts Oil | Oil Operator | Dec 2023 | |
| 4 | Diamond Chemical | Oil & Gas Operator | Jan 1995 | |
| 5 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Dec 2023 |
| 6 | Dreiling Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2018 |