| 801 | Wagner & Brown | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 802 | Wagner & Brown LP | Midland, TX 79702-1714 | Oil & Gas Operator | Aug 2022 |
| 803 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 804 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 805 | Walden E F | Ada, OK 74820 | Oil & Gas Operator | Aug 2014 |
| 806 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Sep 2026 |
| 807 | Walsh Jr F Howard | Fort Worth, TX 76102-4773 | Oil & Gas Operator | May 2026 |
| 808 | Walsh Jr F Howard Opr Co Inc | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Feb 2016 |
| 809 | Wapi Operating LLC | McCurtain, OK 74944 | Oil & Gas Operator | May 2026 |
| 810 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 811 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | May 2026 |
| 812 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Sep 2026 |
| 813 | Warwick-Bacchus LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2026 |
| 814 | Warwick-Jupiter LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2026 |
| 815 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Sep 2026 |
| 816 | Webb Donna Delan Dba Petrodudes | Crescent, OK 73028 | Oil & Gas Operator | Feb 2026 |
| 817 | Webbco | Bray, OK 73012 | Oil Operator | Aug 1998 |
| 818 | Wellco Energy Inc | Harrah, OK 73045 | Oil & Gas Operator | May 2026 |
| 819 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 820 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Jun 2026 |
| 821 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2026 |
| 822 | Wheatland Oil Inc | Enid, OK 73702-1032 | Oil & Gas Operator | Mar 2015 |
| 823 | White Brothers Investment Inc | Dallas, TX 75201 | Oil & Gas Operator | Apr 2014 |
| 824 | White Oak Production Company | Conway, AR 72034 | Oil & Gas Operator | Sep 2005 |
| 825 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 826 | Whitley Oil & Gas Inc | Owasso, OK 74055 | Oil & Gas Operator | Jun 2009 |
| 827 | Wildwood Operating LLC | Hennessey, OK 73742 | Oil & Gas Operator | May 2026 |
| 828 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | May 2026 |
| 829 | Williams Kidd Drilling Corp | Claremore, OK 74017-0846 | Oil Operator | Jun 2013 |
| 830 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 831 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 832 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jun 2026 |
| 833 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 834 | Wolverine Petroleum Corp | Holdenville, OK 74848 | Oil & Gas Operator | Jul 1999 |
| 835 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 836 | Wright Richard | Ratliff City, OK 73481-0155 | Oil & Gas Operator | Mar 2015 |
| 837 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | May 2026 |
| 838 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Sep 2026 |
| 839 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Jun 2026 |
| 840 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | May 2026 |
| 841 | Young Z Joe | Cement, OK 73017-0600 | Oil & Gas Operator | Mar 2015 |
| 842 | Z G Exploration Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2005 |
| 843 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 844 | Zeiders Bros. Oil & Gas Company, L.L.C. | Edmond, OK 73003 | Oil & Gas Operator | May 2026 |
| 845 | Zephyr Operating Co LLC | Oklahoma City, OK 73118-6035 | Oil & Gas Operator | Jun 2026 |
| 846 | Zephyr SWD LLC | Oklahoma City, OK 73118-6035 | Oil Operator | Jun 2026 |