| 1 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 2 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 3 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 4 | Walbet, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Dec 2024 |
| 5 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Dec 2024 |
| 6 | Walton Properties LTD. | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 7 | Warren American Oil Co | Tulsa, OK 74147 | Oil & Gas Operator | Oct 2024 |
| 8 | Wash, Robert C. Inc. | Forsan, TX 79733 | Oil & Gas Operator | Dec 2024 |
| 9 | Watusi Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 10 | West Texas Oil And Gas Corp. | Houston, TX 77056 | Oil & Gas Operator | Feb 2014 |
| 11 | West Texas Oil And Gas Oper.,Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2024 |
| 12 | Westar Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 13 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 14 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 15 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 16 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 17 | White Wing Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2012 |
| 18 | White'S Industrial Engine'S | Houston, TX 77070 | Oil & Gas Operator | Dec 2024 |
| 19 | Wigington, James Robert | Ackerly, TX 79713 | Oil & Gas Operator | Aug 2003 |
| 20 | Wilbanks Reserve Corporation | Denver, CO 80203 | Oil & Gas Operator | Dec 2024 |
| 21 | Wilbanks, Bruce A. | Midland, TX 79701 | Oil & Gas Operator | Aug 1996 |
| 22 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 23 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 24 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Dec 2024 |
| 25 | Williamson, J. C. | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 26 | Wilson, WM. B. Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 27 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 28 | Wind River Resources Inc | Tulsa, OK 74136-6381 | Oil & Gas Operator | Jun 2010 |
| 29 | Wing Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2000 |
| 30 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2024 |
| 31 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Dec 2024 |
| 32 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Dec 2024 |
| 33 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |