| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 601 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 602 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 603 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 604 | Yates Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 605 | Zachry Oil And Gas Properties | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 606 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |