| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 601 | Zadeck Energy Group Inc | Oil & Gas Operator | Jun 2013 | |
| 602 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2024 |
| 603 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |