| 1 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 2 | Waggoner Oil & Gas Corp | Enid, OK 73703-1152 | Oil & Gas Operator | Jul 2025 |
| 3 | Wallace Energy, Inc. | Denver, CO 80202-4327 | Oil Operator | Jun 2015 |
| 4 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Oct 2025 |
| 5 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 6 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jun 2025 |
| 7 | Warfield John E | Cleo Springs, OK 73729-9723 | Oil & Gas Operator | Jul 2005 |
| 8 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Oct 2025 |
| 9 | Warren Drilling Co | Dexter City, OH 45727 | Oil & Gas Operator | Dec 2024 |
| 10 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 11 | Watertech Disposal | Enid, OK 73702-0125 | Oil Operator | Sep 2007 |
| 12 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 13 | Weaver Energy Corporation | Hennessey, OK 73742-1232 | Oil & Gas Operator | Jul 2025 |
| 14 | Wellco Energy Inc | Harrah, OK 73045 | Oil & Gas Operator | Jun 2025 |
| 15 | Wentworth Operating Company | Oklahoma City, OK 73162-1863 | Oil & Gas Operator | Aug 2025 |
| 16 | Western Mountain Resources LLC | Cogan Station, PA 17728 | Oil & Gas Operator | Jun 2025 |
| 17 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Jul 2025 |
| 18 | Western Products Corporation | Fairview, OK 73737 | Oil & Gas Operator | Nov 2004 |
| 19 | Westside Wells Inc | Altus, OK 73521 | Oil & Gas Operator | Nov 2020 |
| 20 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jul 2025 |
| 21 | Wheatland Oil Inc | Enid, OK 73702-1032 | Oil & Gas Operator | Mar 2015 |
| 22 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2025 |
| 23 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Oct 2025 |
| 24 | Whitaker Energy Inc | Humble, TX 77346-1798 | Oil & Gas Operator | Jul 2025 |
| 25 | White Alton L Trust | Nowata, OK 74048 | Oil & Gas Operator | Aug 2013 |
| 26 | White Clarence A | Lawton, OK 73505-4927 | Oil & Gas Operator | Jun 2025 |
| 27 | White Goat Resources LLC | Yukon, OK 73099 | Oil & Gas Operator | Jul 2025 |
| 28 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 29 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 30 | Whitley Oil & Gas Inc | Owasso, OK 74055 | Oil & Gas Operator | Jun 2009 |
| 31 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 32 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 33 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 34 | Wildwood Operating LLC | Hennessey, OK 73742-7711 | Oil & Gas Operator | Jul 2025 |
| 35 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2025 |
| 36 | Wimberley James A | Dallas, TX 75229-6180 | Oil & Gas Operator | Nov 2014 |
| 37 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 38 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2025 |
| 39 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 40 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 41 | Wood Fay C Estate | Enid, OK 73703 | Oil & Gas Operator | Jun 2013 |
| 42 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 43 | WR Oil & Gas LLC | Plano, TX 75024-3523 | Oil & Gas Operator | Jul 2025 |
| 44 | Wyant & O'Keefe | Santa Fe, NM 87501 | Oil & Gas Operator | May 2006 |
| 45 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Jun 2025 |