| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Hanley & Bird Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2011 |
| 2 | Harus Inc | Indiana, PA 15701-9401 | Oil & Gas Operator | Dec 2025 |
| 3 | Heath 91 Cluster LP | Commodore, PA 15729-9109 | Gas Operator | Dec 2025 |
| 4 | Highpointe Oil & Gas LLC | Indiana, PA 15701-8944 | Gas Operator | Dec 2025 |
| 5 | Howard Drilling Inc | Mount Jewett, PA 16740-0556 | Oil & Gas Operator | Dec 2025 |
| 6 | Huntley & Huntley Inc | Monroeville, PA 15146-2302 | Oil & Gas Operator | Dec 2019 |