| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 701 | Zachry Exploration, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Jan 2009 |
| 702 | Zebra Oil Company | El Campo, TX 77437 | Oil & Gas Operator | Dec 2025 |
| 703 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |