| 1 | W & T Offshore, Inc. | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 2 | W.A. Oil Co. | Andrews, TX 79714 | Oil & Gas Operator | Aug 1997 |
| 3 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 4 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 5 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 6 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Oct 2025 |
| 7 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 8 | Warrior Exploration LLC | Sapulpa, OK 74067-1912 | Oil & Gas Operator | Jun 2025 |
| 9 | Wash, Robert C. Inc. | Forsan, TX 79733 | Oil & Gas Operator | Oct 2025 |
| 10 | Watusi Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 11 | West Texas Oil And Gas Corp. | Houston, TX 77056 | Oil & Gas Operator | Feb 2014 |
| 12 | West Texas Oil And Gas Oper.,Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2024 |
| 13 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 14 | White Wing Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2012 |
| 15 | White, Ralph H. | Midland, TX 79701 | Oil & Gas Operator | Oct 2002 |
| 16 | Whitfield Energy | Midland, TX 79702 | Oil & Gas Operator | Jan 1999 |
| 17 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 18 | Wigington, James Robert | Ackerly, TX 79713 | Oil & Gas Operator | Aug 2003 |
| 19 | Wilbanks, Bruce & G.L. | Midland, TX 79702 | Oil & Gas Operator | Aug 1996 |
| 20 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 21 | Wilton Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Apr 1999 |
| 22 | Winchester Operating, Inc. | Bryan, TX 77808 | Oil & Gas Operator | Aug 2001 |
| 23 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 24 | Wineland Oil - LLC | Hays, KS 67601 | Oil Operator | May 2025 |
| 25 | Woodbine Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 26 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |