| 1 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 2 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Dec 2024 |
| 3 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Dec 2024 |
| 4 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 5 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
| 6 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 7 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 2024 |
| 8 | WG Operating, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | May 2012 |
| 9 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Oct 2024 |
| 10 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Dec 2024 |
| 11 | Wheeler Midstream LLC | Houston, TX 77002 | Oil & Gas Operator | May 2018 |
| 12 | White River Energy LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2010 |
| 13 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jul 2024 |
| 14 | Whitlock, J.R. Operator | Amarillo, TX 79105 | Gas Operator | Jul 1997 |
| 15 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 16 | Wilbanks Exploration, Inc. | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 17 | Wilbanks Reserve Corporation | Denver, CO 80203 | Oil & Gas Operator | Dec 2024 |
| 18 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Dec 2024 |
| 19 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Sep 2024 |
| 20 | Williams, W. R. | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2013 |
| 21 | Williams, W. R., Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Feb 2024 |
| 22 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2024 |
| 23 | Williford Petroleum LLC | Green CV SPGS, FL 32043 | Oil & Gas Operator | Dec 2024 |
| 24 | Wilshire Oil Co. Of Texas | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2004 |
| 25 | Winright Resources Operating,LLC | Houston, TX 77007 | Oil & Gas Operator | Dec 2024 |
| 26 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 27 | Wolf Creek Exploration Company | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2000 |
| 28 | Wright Trucking, Inc. | Weatherford, OK 73096 | Oil & Gas Operator | Feb 2019 |
| 29 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 30 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Dec 2024 |