| 801 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 802 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Jan 2025 |
| 803 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Jan 2025 |
| 804 | United States Trading & Trans | Dallas, TX 75380-3342 | Oil & Gas Operator | Dec 1994 |
| 805 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | Apr 2025 |
| 806 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Apr 2025 |
| 807 | Van Horn Oil & Gas Inc | Tulsa, OK 74170 | Oil & Gas Operator | Nov 1998 |
| 808 | Van Horn Oil Company | Ada, OK 74820 | Oil & Gas Operator | Oct 1999 |
| 809 | Vaughan Otto M | | Oil & Gas Operator | Apr 2014 |
| 810 | Vaughan Production Company, Inc. | Norman, OK 73072 | Oil & Gas Operator | Sep 2014 |
| 811 | Veenker Resources, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Feb 2025 |
| 812 | Venis Dwain | Seminole, OK 74818-1975 | Oil & Gas Operator | Feb 2012 |
| 813 | Venis Exploration Company | Aledo, TX 76008 | Oil & Gas Operator | Oct 2024 |
| 814 | Venus Exploration, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2013 |
| 815 | Venus Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2002 |
| 816 | Villines J K | Ada, OK 74820-8323 | Oil & Gas Operator | Apr 2014 |
| 817 | Vista Energy Inc | Yukon, OK 73085-0827 | Oil & Gas Operator | Mar 2015 |
| 818 | Vitol Inc | Houston, TX 77002 | Oil & Gas Operator | Sep 2023 |
| 819 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 820 | Waddell Norman | Seminole, OK 74868-1244 | Oil & Gas Operator | Nov 1998 |
| 821 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 822 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 823 | Ward Oil Co. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 824 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 825 | Ware Jimmy M | Seminole, OK 74868 | Oil & Gas Operator | Nov 1998 |
| 826 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Apr 2025 |
| 827 | Watkins J L | Henryetta, OK 74437 | Oil & Gas Operator | Jan 2025 |
| 828 | Webb Jess Oil Producer | | Oil Operator | Sep 2014 |
| 829 | Welch Family Trust | Ada, OK 74820-9643 | Oil & Gas Operator | Apr 2015 |
| 830 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Feb 2025 |
| 831 | West Operating Company | Seminole, OK 74868-3851 | Oil & Gas Operator | Mar 2015 |
| 832 | Westamerica Corporation | Dewey, OK 74029-0040 | Oil & Gas Operator | Aug 1999 |
| 833 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 834 | Wheeler Richard Jr | Oklahoma City, OK 73112-8857 | Oil & Gas Operator | Mar 2005 |
| 835 | White Alton L Trust | Nowata, OK 74048 | Oil & Gas Operator | Aug 2013 |
| 836 | White N J & White J B | Paden, OK 74860-0114 | Oil Operator | Aug 2013 |
| 837 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 838 | Whitley Robert L | Saint Louis, OK 74866-0004 | Oil & Gas Operator | Sep 2014 |
| 839 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 840 | Williams Dale | Konawa, OK 74849-9211 | Oil Operator | Jan 2025 |
| 841 | Williams Reid Oil Co | Dallas, TX 75234 | Oil & Gas Operator | Jan 2025 |
| 842 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 843 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 844 | Wise Oil & Gas Company LLC | Shawnee, OK 74801-8507 | Oil & Gas Operator | Feb 2024 |
| 845 | WM Energy LLC | Asher, OK 74826 | Oil & Gas Operator | Jan 2025 |
| 846 | Woodland Operating LLC | Rio VIsta, TX 76093-0010 | Oil & Gas Operator | Sep 2024 |
| 847 | Wright Operating, Inc. | Denison, TX 75020 | Oil & Gas Operator | Apr 2025 |
| 848 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Jan 2025 |
| 849 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Feb 2025 |
| 850 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Feb 2025 |
| 851 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | Feb 2025 |
| 852 | Yerby Bill | Ada, OK 74820-5404 | Oil Operator | Jan 2012 |
| 853 | Younger Enterprises Inc | Ada, OK 74821-1882 | Oil Operator | Jan 2003 |
| 854 | Zafar Oil & Gas, Inc. | Oklahoma City, OK 73132 | Oil Operator | Aug 2013 |
| 855 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |