| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H & W Energy | Youngstown, OH 44512 | Oil & Gas Operator | Dec 2015 |
| 2 | H I Smith Oil & Gas Inc | Holmesville, OH 44633 | Oil & Gas Operator | Dec 2023 |
| 3 | Halcon Operating Co., Inc. | Houston, TX 77024 | Oil & Gas Operator | Nov 2024 |
| 4 | Hall & Horning Serv Inc | Atwater, OH 44201-9375-9375 | Oil & Gas Operator | Dec 2009 |
| 5 | Hall Energy Inc | Magnetic Spring, OH 43036-218-218 | Oil & Gas Operator | Dec 2017 |
| 6 | Hardco, Inc. | Cleveland, OH 44115 | Oil & Gas Operator | Dec 1992 |
| 7 | Harrison Energy | Tippecanoe, OH 44699 | Oil & Gas Operator | Dec 2000 |