| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Zargon Oil (ND) Inc. | Oil & Gas Operator | Feb 2026 | |
| 2 | Zavanna Energy Operating, LLC | Oil & Gas Operator | Feb 2026 | |
| 3 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 4 | Zenergy Operating Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2016 |
| 5 | Zephyr Williston LLC | Oil & Gas Operator | Feb 2026 | |
| 6 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |