| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Darrah John J Jr | Oil & Gas Operator | Oct 1994 | |
| 2 | Davis Petroleum | Oil & Gas Operator | Dec 1996 | |
| 3 | Davis Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Aug 2021 |
| 4 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Feb 2026 |
| 5 | Deutsch Oil Company | Oil & Gas Operator | Feb 2026 | |
| 6 | DMH Petroleum, Inc. | Sterling, KS 67579 | Oil Operator | Feb 2026 |
| 7 | Dorado E & P Partners LLC | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2026 |
| 8 | Duke Drilling Co | Wichita, KS 67202 | Oil & Gas Operator | Feb 2006 |
| 9 | Dunne Equities I | Oil & Gas Operator | Dec 1995 |