| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 6601 | Zinke & Trumbo LTD | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2017 |
| 6602 | Zion Energy Corporation | Peru, KS 67360 | Oil Operator | Aug 2000 |
| 6603 | Zollinger Veldon | Cresent, OK 73028 | Oil & Gas Operator | Apr 2009 |
| 6604 | Zollinger Veldon Inc | Crescent, OK 73028-9280 | Oil & Gas Operator | Nov 2018 |
| 6605 | ZP Disposal Systems LLC | Kingfisher, OK 73750 | Oil Operator | Jun 2025 |
| 6606 | Zuhone William H | Mattoon, IL 61938-4019 | Oil & Gas Operator | Jan 2015 |
| 6607 | Zumyers Inc | Newalla, OK 74857-0259 | Oil Operator | Apr 2003 |
| 6608 | ZZ Energy LLC | Norman, OK 73070 | Gas Operator | May 2025 |
| 6609 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |