| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D & Z Exploration, Inc. | St Elmo, IL 62458 | Oil Operator | Sep 2025 |
| 2 | D. E. Exploration, Inc. | Wellsville, KS 66092 | Oil & Gas Operator | Sep 2025 |
| 3 | Danranco Limited | Gas Operator | Oct 1990 | |
| 4 | DB Energy, LLC | Baldwin City, KS 66006 | Oil Operator | Sep 2025 |
| 5 | De & TZ LLC | Wellsville, KS 66092 | Oil Operator | Sep 2025 |