| 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 | Jun 2025 |
| 3 | Hansen Dane G TR | Oil Operator | Feb 1995 | |
| 4 | Hartman Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 5 | Hrbek, R.L. | Merino, CO 80741 | Oil & Gas Operator | Jan 2024 |
| 6 | Hummon Corp. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2023 |