| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Halliburton Oil | Oil & Gas Operator | Sep 2008 | |
| 2 | Harper Oil And Gas, LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 3 | Hawley John B Jr | Gas Operator | Dec 1983 | |
| 4 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Sep 2025 |
| 5 | Herndon Drilling | Oil & Gas Operator | May 1988 | |
| 6 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 7 | Hummon Corp | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |