| 601 | Whitehead Prod. Co., Inc. | Humble, TX 77338 | Oil & Gas Operator | Jan 2024 |
| 602 | Whiteside, H. W. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 603 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 604 | Whitt Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2024 |
| 605 | Whitt, W. J. | Albany, TX 76430 | Oil & Gas Operator | Nov 1996 |
| 606 | Wilbanks, Bruce A. | Midland, TX 79701 | Oil & Gas Operator | Aug 1996 |
| 607 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 608 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 609 | Williams Deville Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2024 |
| 610 | Wilson Well Service Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2024 |
| 611 | Wilson, Olan Max | Cisco, TX 76437 | Oil & Gas Operator | Apr 2024 |
| 612 | Winco Oil Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 613 | Windham Resources | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 614 | Windham Resources, Inc. | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2004 |
| 615 | Window Operating Co., The | Coleman, TX 76834 | Oil & Gas Operator | Apr 2024 |
| 616 | Woodygreen Resources, LLC | Plano, TX 75093 | Oil & Gas Operator | Apr 2024 |
| 617 | Wylie Bros. Prod. & DRGL. Co,Inc | Baird, TX 79504 | Oil & Gas Operator | Apr 2024 |
| 618 | Wylie, Fred, Jr. | Moran, TX 76464 | Oil & Gas Operator | Oct 2022 |
| 619 | Xtreme Operating Company LLC | Flower Mound, TX 75022 | Oil Operator | Apr 2024 |
| 620 | Yeates, F. L. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 1997 |
| 621 | Yellow Rose Oil & Gas Oper. Inc. | Cisco, TX 76437 | Oil & Gas Operator | Apr 2024 |
| 622 | Yellow Rose Oil & Gas Operating | Cisco, TX 76437 | Oil & Gas Operator | Jan 1996 |
| 623 | Zachry Oil And Gas Properties | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 624 | Ziegler-Peru, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2019 |
| 625 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |