| 1 | W & T Offshore, Inc. | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 2 | W.A. Oil Co. | Andrews, TX 79714 | Oil & Gas Operator | Aug 1997 |
| 3 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 4 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 5 | Walkabout Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Mar 2025 |
| 6 | Wallen Production Co. | Midland, TX 79702 | Oil & Gas Operator | Aug 1996 |
| 7 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Mar 2025 |
| 8 | Walsh Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2022 |
| 9 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 10 | Walter Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 11 | Warrior Exploration LLC | Sapulpa, OK 74067-1912 | Oil & Gas Operator | Dec 2024 |
| 12 | Watusi Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 13 | Westar Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 14 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 15 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 16 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 17 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Mar 2025 |
| 18 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jan 2025 |
| 19 | WG Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Mar 2025 |
| 20 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Mar 2025 |
| 21 | Whitehawk Production Company | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 22 | Whitehead Prod. Co., Inc. | Humble, TX 77338 | Oil & Gas Operator | Dec 2024 |
| 23 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 24 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Aug 2024 |
| 25 | Wilbanks Reserve Corporation | Denver, CO 80203 | Oil & Gas Operator | Mar 2025 |
| 26 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 27 | Wild Cat Operating Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 28 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 29 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Mar 2025 |
| 30 | Williamson, Ralph E. | Midland, TX 79702 | Oil & Gas Operator | Jan 2012 |
| 31 | Wilson Hydrocarbon Inc. | Houston, TX 77066 | Oil & Gas Operator | Mar 2025 |
| 32 | Wind River Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 33 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 34 | Windsor Permian LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2012 |
| 35 | Winfield Operating Company | Dallas, TX 75214 | Oil & Gas Operator | Mar 2025 |
| 36 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 37 | Wiseman, B. W., Jr. | Midland, TX 79702 | Oil & Gas Operator | Dec 2002 |
| 38 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Mar 2025 |
| 39 | Wood Oil Company | Tulsa, OK 74103 | Gas Operator | Oct 1997 |
| 40 | Wood, McShane & Thams | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 41 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 42 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |
| 43 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |