| 701 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 702 | Walton Producing Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2005 |
| 703 | Walton Producing Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 704 | Waters Petroleum | Albany, TX 76430 | Oil & Gas Operator | Aug 2016 |
| 705 | Watson Energy Investments, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 706 | Weakland Investments, Inc. | Denver, CO 80215 | Oil & Gas Operator | Oct 2025 |
| 707 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 708 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 709 | West Inland Energy, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Oct 2025 |
| 710 | West Texas Royalties, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 711 | West-States Energy, Inc. | Rimrock, AZ 86335 | Oil Operator | Oct 2025 |
| 712 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 713 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 714 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 715 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 716 | White, Oscar | Tuscola, TX 79562 | Oil & Gas Operator | Oct 2025 |
| 717 | Whiteside, H. W. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 718 | Whitt Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 719 | Whitt, W. J. | Albany, TX 76430 | Oil & Gas Operator | Nov 1996 |
| 720 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 721 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 722 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Oct 2025 |
| 723 | Winchester Energy Operating Co. | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 724 | Winco Oil Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 725 | Winfrey Oil Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2016 |
| 726 | Wingrove Operating, LLC | Odessa, TX 79760 | Oil Operator | Oct 2025 |
| 727 | Wingrove Well Service, Inc. | Lueders, TX 79533 | Oil & Gas Operator | Nov 2023 |
| 728 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 729 | Woodygreen Resources, LLC | Plano, TX 75093 | Oil & Gas Operator | Oct 2025 |
| 730 | Woodygreen Resources, LP | Abilene, TX 79608 | Oil & Gas Operator | Mar 2012 |
| 731 | Wortham, E. H. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 732 | Xeric Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Jul 1997 |
| 733 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 734 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 735 | Xplore Operating, LLC | Arlington, TX 76001 | Oil & Gas Operator | Oct 2025 |
| 736 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 737 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 738 | Zagava, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |