| 1 | Wehunt Oil Company, Inc. | Dallas, TX 75376 | Oil & Gas Operator | Nov 2002 |
| 2 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 3 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 4 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 5 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 6 | Williams Prod. Gulf Coast, L.P. | Benbrook, TX 76126 | Oil & Gas Operator | Jan 2012 |
| 7 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 8 | Winfield Operating Company | Dallas, TX 75214 | Oil & Gas Operator | Jul 2025 |
| 9 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | Jul 2025 |
| 10 | WLH Production LLC | Gainesville, TX 76240 | Oil Operator | Jul 2025 |
| 11 | Wolsey Well Service, Inc. | Windthorst, TX 76389 | Oil & Gas Operator | Jul 2006 |
| 12 | Wolsey Well Service, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Jun 2014 |
| 13 | WPX Energy Gulf Coast, LP | Benbrook, TX 76126 | Oil & Gas Operator | May 2012 |
| 14 | WT Fitts Operating | Bowie, TX 76230 | Oil & Gas Operator | Jul 2025 |
| 15 | Wy Woodland Operating, LLC | Covington, TX 76636 | Oil & Gas Operator | Jul 2025 |