| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Abbott Donald Jay | Edinboro, PA 16412-4129 | Gas Operator | Dec 2018 |
| 2 | Abram Oil Co | Saegertown, PA 16433 | Oil & Gas Operator | Dec 2025 |
| 3 | Advanced Petro Corp | Hamburg, NY 14075-5003 | Oil & Gas Operator | Dec 1992 |
| 4 | Allen Energy LLC | Cochranton, PA 16314-6214 | Oil & Gas Operator | Dec 2025 |
| 5 | Atlas Resources Inc | Coraopolis, PA 15108-0611 | Oil & Gas Operator | Dec 2007 |
| 6 | Atlas Resources LLC | Pittsburgh, PA 15275-1033 | Oil & Gas Operator | Jun 2018 |
| 7 | Atwood Energy Inc | Port Washington, OH 43837-9214 | Oil & Gas Operator | Dec 1993 |
| 8 | Autumn Ridge Energy LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2021 |