| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | H L Altier Service Co Inc | Canton, OH 44718-3752 | Oil & Gas Operator | Dec 2013 |
| 2 | Hayes James Brent | Guysville, OH 45735-9496 | Oil & Gas Operator | Dec 2025 |
| 3 | Hocking Technical College | Nelsonville, OH 45764 | Oil & Gas Operator | Dec 2025 |
| 4 | Hopewell Oil & Gas Development Company | Columbus, OH 43228 | Oil & Gas Operator | Dec 2019 |
| 5 | Houghton Investments LLC | Columbus, OH 43235 | Oil & Gas Operator | Dec 2025 |
| 6 | Huffman-Bowers Inc | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2024 |