| 901 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 902 | Walker Corporation (The) | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 903 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Mar 2025 |
| 904 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 905 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Dec 2024 |
| 906 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Mar 2025 |
| 907 | Warren Drilling Co | Dexter City, OH 45727 | Oil & Gas Operator | Dec 2023 |
| 908 | Weaver Energy Corporation | Hennessey, OK 73742-1232 | Oil & Gas Operator | Jan 2025 |
| 909 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 910 | Welch Family Trust | Ada, OK 74820-9643 | Oil & Gas Operator | Apr 2015 |
| 911 | Wellco Energy Inc | Harrah, OK 73045 | Oil & Gas Operator | Dec 2024 |
| 912 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Jan 2025 |
| 913 | Western Division Investments Inc | Enid, OK 73701 | Oil & Gas Operator | Jul 2021 |
| 914 | Western Gas Resources Inc | Denver, CO 80202-1955 | Oil & Gas Operator | Dec 2007 |
| 915 | Western Tank Trucks Inc | Hennessey, OK 73742 | Oil Operator | Jul 2011 |
| 916 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jan 2025 |
| 917 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Dec 2024 |
| 918 | Wheeler Richard Jr | Oklahoma City, OK 73112-8857 | Oil & Gas Operator | Mar 2005 |
| 919 | White Goat Resources LLC | Yukon, OK 73099 | Oil & Gas Operator | Jan 2025 |
| 920 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Mar 2025 |
| 921 | White Star Petroleum LLC | Oklahoma City, OK 73116-7906 | Oil & Gas Operator | Dec 2024 |
| 922 | Whitehead Ross E | Lamont, OK 74643-0326 | Oil & Gas Operator | Nov 2014 |
| 923 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 924 | Wicklund Petroleum Corporation | Naples, FL 34108-0108 | Oil & Gas Operator | Dec 2019 |
| 925 | Wilco Oil & Gas Corporation | Oklahoma City, OK 73159-6229 | Oil & Gas Operator | Dec 2023 |
| 926 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2025 |
| 927 | Wildwood Operating LLC | Hennessey, OK 73742-7711 | Oil & Gas Operator | Dec 2024 |
| 928 | Williams Roger F | Tulsa, OK 74152-0951 | Oil & Gas Operator | May 2013 |
| 929 | Winston Oil Co | Marietta, OH 45750-754-754 | Oil & Gas Operator | Dec 2024 |
| 930 | Winzeler Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2013 |
| 931 | Withrow Oil Company Inc | Yukon, OK 73099-7712 | Oil & Gas Operator | Apr 2021 |
| 932 | Witty Thomas E | Enid, OK 73703 | Oil & Gas Operator | Mar 2008 |
| 933 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jan 2025 |
| 934 | Wood Fay C Estate | Enid, OK 73703 | Oil & Gas Operator | Jun 2013 |
| 935 | WR Oil & Gas LLC | Plano, TX 75024-3523 | Oil & Gas Operator | Jan 2025 |
| 936 | Wright Jerry L | Crescent, OK 73028-0474 | Oil & Gas Operator | Jun 2013 |
| 937 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Jan 2025 |
| 938 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | Dec 2024 |
| 939 | Young H Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 1993 |
| 940 | Zollinger Veldon Inc | Crescent, OK 73028-9280 | Oil & Gas Operator | Nov 2018 |
| 941 | ZP Disposal Systems LLC | Kingfisher, OK 73750 | Oil Operator | Dec 2024 |
| 942 | Zuhone William H | Mattoon, IL 61938-4019 | Oil & Gas Operator | Jan 2015 |