| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H-40 Drilling, Inc. | Medicine Lodge, KS 67104 | Gas Operator | Jun 2025 |
| 2 | Habit Petroleum, LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 3 | Halliburton Oil | Oil & Gas Operator | Sep 2008 | |
| 4 | Hartman Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 5 | Hays Oil Field S | Oil Operator | Nov 1988 | |
| 6 | Hellar Drilling | Oil & Gas Operator | Jan 1994 | |
| 7 | Helmerich & Payn | Oil & Gas Operator | Aug 1995 | |
| 8 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Jun 2025 |