| 901 | Walter Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 902 | Walton Producing Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2005 |
| 903 | Walton, W. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 1994 |
| 904 | Ward, Charles Oil Company | Olney, TX 76374 | Oil Operator | May 2025 |
| 905 | Ward, L. S. | Graham, TX 76450 | Oil & Gas Operator | Jun 2001 |
| 906 | WB Mullin Operating LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 907 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 908 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 909 | Wes-Mor Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 1994 |
| 910 | West Texas Royalties, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 911 | West,Gordon T.Jr. & Rugeley,Stan | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2019 |
| 912 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 913 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 914 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 915 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 916 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | May 2025 |
| 917 | White Knight Production LLC | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2024 |
| 918 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | May 2025 |
| 919 | Whitehead Prod. Co., Inc. | Humble, TX 77338 | Oil & Gas Operator | Mar 2025 |
| 920 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 921 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 922 | Whitten Energy Corp. | Houston, TX 77090 | Oil & Gas Operator | May 2025 |
| 923 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 924 | Wilcox Energy Company LLC | Rule, TX 79547 | Oil & Gas Operator | May 2025 |
| 925 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 926 | Willis Operating Co. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 927 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 928 | Wills Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 929 | Wills Oil Holdings, L.L.C. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 930 | Wilton, Frank | Graham, TX 76450 | Oil & Gas Operator | Oct 2016 |
| 931 | Wise Exploration | Perrin, TX 76486 | Oil & Gas Operator | May 2025 |
| 932 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | May 2025 |
| 933 | Wofford, C. J. | El Campo, TX 77437 | Oil & Gas Operator | May 2025 |
| 934 | Wolfson, I. J. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2002 |
| 935 | Wolsey Oil Inc. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 936 | Woodbine Petroleum, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Aug 2003 |
| 937 | World Producers, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1994 |
| 938 | Wortham, E. H. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 939 | WP Oil & Gas Exploration LLC | Loving, TX 76460 | Oil Operator | May 2025 |
| 940 | Wright, Robert W. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 941 | Wright, Robert W. Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 942 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 943 | Xstar Resources LLC | Jacksboro, TX 76458 | Oil & Gas Operator | May 2025 |
| 944 | Yeates Development Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 945 | Yeates, F. L. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 1997 |
| 946 | Yobel, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 2025 |
| 947 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 948 | Young, Clint Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |