| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Z G Exploration Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2005 |
| 2 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 3 | Zephyr Operating Co LLC | Oklahoma City, OK 73118-6035 | Oil & Gas Operator | Jan 2024 |
| 4 | Zephyr SWD LLC | Oil Operator | Dec 2023 | |
| 5 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 6 | Zimet Brothers Inc | Oil Operator | Mar 2008 | |
| 7 | Zinke & Trumbo LTD | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2017 |
| 8 | ZP Disposal Systems LLC | Kingfisher, OK 73750-7084 | Oil Operator | Jan 2024 |