| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Hay Leonard | Rock Springs, WY 82901 | Oil & Gas Operator | Sep 1994 |
| 2 | High River Resources Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Jul 2026 |
| 3 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Sep 2026 |
| 4 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Sep 2026 |
| 5 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2002 |
| 6 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 7 | Husky Oil Company | Cody, WY 82414 | Oil & Gas Operator | Dec 1984 |