| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Hardrock Oil Company | Great Falls, MT 59403 | Gas Operator | Nov 2025 |
| 2 | Haynes, Keisel | Bushnell, IL 61422-000 | Gas Operator | Dec 2014 |
| 3 | Home-Stake Oil & Gas Company | Plano, TX 75093 | Oil & Gas Operator | Sep 2025 |
| 4 | Humble Oil & Refining Co. | Houston, TX 77252 | Oil & Gas Operator | Jan 2000 |