| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 301 | Wynn Oil Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1998 |
| 302 | Yoder Darrell Dba Double "D" | Dayton, OH 45458 | Oil & Gas Operator | Dec 2015 |
| 303 | Zenith Exploration Co Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2014 |
| 304 | Zilkha Energy Inc | Houston, TX 77002-5223-5223 | Oil & Gas Operator | Dec 2008 |
| 305 | Zink Petroleum Corp | Uniontown, OH 44685 | Oil & Gas Operator | Dec 1993 |