| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H & L Oprerating Company LLP | Amarillo, TX 79114 | Oil & Gas Operator | Nov 2019 |
| 2 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 3 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Sep 2025 |
| 4 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Dec 2025 |
| 5 | Huber J M Corpor | Oil & Gas Operator | Dec 1996 | |
| 6 | Huber Oil Company, A General Partnership | Madison, KS 66860 | Oil & Gas Operator | Feb 2025 |
| 7 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |