| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D & T Oil Company | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 2 | Dale E. Jackson Production Co. | Oil Operator | Jun 2025 | |
| 3 | Derrick Petroleu | Oil Operator | Sep 1994 | |
| 4 | Diamond B Indust | Oil Operator | Nov 1996 |