| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D. R. Lauck Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jul 2019 |
| 2 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Feb 2026 |
| 3 | Delhi Pipeline | Oil & Gas Operator | Sep 1999 | |
| 4 | Deutsch Oil Company | Oil & Gas Operator | Feb 2026 | |
| 5 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 6 | DNB Drilling, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2001 |
| 7 | Dunne-Gardner Pe | Oil & Gas Operator | Nov 1992 | |
| 8 | Dunne-Gardner Petroleum, Inc. | Wichita, KS 67202 | Gas Operator | Jun 2022 |