| 1 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 2 | Wagner & Brown | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 3 | Wagner & Brown LP | Midland, TX 79702-1714 | Oil & Gas Operator | Aug 2022 |
| 4 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 5 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 6 | Walden E F | Ada, OK 74820 | Oil & Gas Operator | Aug 2014 |
| 7 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Apr 2024 |
| 8 | Walsh Jr F Howard | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Dec 2023 |
| 9 | Walsh Jr F Howard Opr Co Inc | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Feb 2016 |
| 10 | Ward Gas Marketing Inc | Enid, OK 73702 | Oil & Gas Operator | Sep 2011 |
| 11 | Ward Oil Company An Okla Corp | McAlester, OK 74501 | Oil & Gas Operator | Feb 1993 |
| 12 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Jan 2024 |
| 13 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Apr 2024 |
| 14 | Warwick-Bacchus LLC | | Oil & Gas Operator | Jan 2024 |
| 15 | Warwick-Jupiter LLC | | Oil & Gas Operator | Jan 2024 |
| 16 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 17 | Webbco | Bray, OK 73012 | Oil Operator | Aug 1998 |
| 18 | Wellco Energy Inc | Oklahoma City, OK 73113-0130 | Oil & Gas Operator | Jan 2024 |
| 19 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 20 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Feb 2024 |
| 21 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2024 |
| 22 | Wheatland Oil Inc | Enid, OK 73702-1032 | Oil & Gas Operator | Mar 2015 |
| 23 | White Brothers Investment Inc | Dallas, TX 75201 | Oil & Gas Operator | Apr 2014 |
| 24 | White Oak Production Company | Conway, AR 72034 | Oil & Gas Operator | Sep 2005 |
| 25 | White Wolf Energy LLC | | Oil & Gas Operator | Oct 2022 |
| 26 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 27 | Whitley Oil & Gas Inc | Owasso, OK 74055 | Oil & Gas Operator | Jun 2009 |
| 28 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jan 2024 |
| 29 | Williams Kidd Drilling Corp | Claremore, OK 74017-0846 | Oil Operator | Jun 2013 |
| 30 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 31 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 32 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 33 | WLW Oil & Gas LLC | Kingfisher, OK 73750-1102 | Oil & Gas Operator | Feb 2024 |
| 34 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 35 | Wolverine Petroleum Corp | Holdenville, OK 74848 | Oil & Gas Operator | Jul 1999 |
| 36 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 37 | Woodward Iodine Corporation | Woodward, OK 73802-1245 | Oil & Gas Operator | Feb 2024 |
| 38 | Wright Richard | Ratliff City, OK 73481-0155 | Oil & Gas Operator | Mar 2015 |
| 39 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Jan 2024 |