| 801 | Western Energy Group, LLC | Leander, TX 78641 | Oil & Gas Operator | Mar 2025 |
| 802 | Western Pride Resources, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2011 |
| 803 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | Mar 2025 |
| 804 | Whitesands Operating, L.L.C. | Corpus Chrsti, TX 78466 | Oil & Gas Operator | Mar 2025 |
| 805 | Whitesands Resources, L.L.C. | Corpus Chrsti, TX 78466 | Oil Operator | Jun 2019 |
| 806 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 807 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Aug 2024 |
| 808 | Whittington Operating Company | Houston, TX 77069 | Oil & Gas Operator | Mar 2025 |
| 809 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Mar 2025 |
| 810 | Wilson Hydrocarbon Inc. | Houston, TX 77066 | Oil & Gas Operator | Mar 2025 |
| 811 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 812 | Winslow, Harry C. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2025 |
| 813 | Wofford, C. J. | El Campo, TX 77437 | Oil & Gas Operator | Mar 2025 |
| 814 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 815 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 816 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
| 817 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 818 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |