| 1 | W & W Production, LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2024 |
| 2 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 3 | Walbet, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Apr 2024 |
| 4 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Apr 2024 |
| 5 | Walsh Resources, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Apr 2024 |
| 6 | Walter Exploration Company | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 7 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 8 | Walton Producing Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2005 |
| 9 | Walton, W. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 1994 |
| 10 | Watco Energy, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Apr 1996 |
| 11 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 12 | West Inland Energy, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Apr 2024 |
| 13 | Western Sky Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 14 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 15 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2024 |
| 16 | Westwin Energy I, LP | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 17 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 18 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 19 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 20 | Williams, A. Oil | Wichita Falls, TX 76308 | Oil Operator | Apr 2024 |
| 21 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2024 |
| 22 | Wilson Brothers Leasing Co., Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2015 |
| 23 | Wilson Energy LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2023 |
| 24 | Wilson Exploration Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1996 |
| 25 | Wilson, W. Corp. | Midland, TX 79705 | Oil & Gas Operator | Mar 1999 |
| 26 | Wilson, WM. B. Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 27 | Winchester Energy, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 28 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 29 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |