| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H & W Energy | Youngstown, OH 44512 | Oil & Gas Operator | Dec 2015 |
| 2 | Halcon Operating Co., Inc. | Houston, TX 77024 | Oil & Gas Operator | Mar 2025 |
| 3 | Hall & Horning Serv Inc | Atwater, OH 44201-9375-9375 | Oil & Gas Operator | Dec 2009 |
| 4 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Mar 2025 |
| 5 | Hortin & Huffman Pet Geol | Worthington, OH 43085 | Oil & Gas Operator | Dec 2000 |