| 1 | W.O.G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 2 | W.W.R. Holding, LLC | Coleman, TX 76834 | Oil & Gas Operator | Mar 2008 |
| 3 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 4 | Walker Oil & Gas | Early, TX 76802 | Oil & Gas Operator | Dec 2002 |
| 5 | Ward Trust | Spring, TX 77383 | Oil & Gas Operator | May 2013 |
| 6 | Waskom, Reagan Operating Company | Boerne, TX 78006 | Gas Operator | Mar 2005 |
| 7 | WCT Leasing Co. | Austin, TX 78734 | Oil & Gas Operator | Apr 2019 |
| 8 | Weaver Global Operating, LLC | Colleyville, TX 76034 | Oil Operator | Dec 2025 |
| 9 | Wejco, Inc. | Rising Star, TX 76471 | Oil & Gas Operator | Dec 2025 |
| 10 | Wes-Tex Oil Co. (I) | Bangs, TX 76823 | Oil & Gas Operator | Dec 2025 |
| 11 | West Texas Diversified Interests | Eastland, TX 76448 | Oil & Gas Operator | Jun 2006 |
| 12 | West Texas Royalties, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 13 | Weststar Operating Company | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2015 |
| 14 | WG Operating, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | May 2012 |
| 15 | White Knight Production LLC | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2024 |
| 16 | White, Oscar | Tuscola, TX 79562 | Oil & Gas Operator | Dec 2025 |
| 17 | Whitehead Prod. Co., Inc. | Humble, TX 77338 | Oil & Gas Operator | Oct 2025 |
| 18 | Whitt, W. J. | Albany, TX 76430 | Oil & Gas Operator | Nov 1996 |
| 19 | Wilbrook Exploration, Inc. | Lingleville, TX 76461 | Oil & Gas Operator | Aug 2003 |
| 20 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 21 | Wilson Energy Resources LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 22 | Wilson Well Service Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Dec 2025 |
| 23 | Wilson, Olan Max | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 24 | Window Operating Co., The | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 25 | WJH Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 26 | Wortham, E. H. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 27 | Wylie Bros. Prod. & DRGL. Co,Inc | Baird, TX 79504 | Oil & Gas Operator | Dec 2025 |