| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H & C Oil Operat | Oil & Gas Operator | Dec 1996 | |
| 2 | H & C Oil Operating Inc. | Plainville, KS 67663 | Oil & Gas Operator | Feb 2025 |
| 3 | Hadson Petroleum | Oil Operator | Sep 1988 | |
| 4 | Hartman Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Feb 2025 |
| 5 | Hembree Robert F | Oil Operator | Dec 2009 | |
| 6 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Feb 2025 |
| 7 | HJ, Inc. | Garden City, KS 67846 | Oil & Gas Operator | Feb 2025 |