| 1 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 2 | Waco Petro, LP | Sulphur SPGS, TX 75483 | Oil Operator | Sep 2015 |
| 3 | Waggoner, W. T., Estate | Vernon, TX 76385 | Oil & Gas Operator | Feb 2018 |
| 4 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Apr 2024 |
| 5 | Walter Exploration Company | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 6 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 7 | Walton Producing Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2005 |
| 8 | Walton Producing Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 9 | Walton, W. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 1994 |
| 10 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 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 Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 14 | Westico Energy Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2004 |
| 15 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 16 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2024 |
| 17 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 18 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 19 | Whitemound Oil Company | FT Stockton, TX 79735 | Oil & Gas Operator | Jan 2017 |
| 20 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 21 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 22 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 23 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Apr 2024 |
| 24 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 25 | Williams, A. Oil | Wichita Falls, TX 76308 | Oil Operator | Apr 2024 |
| 26 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 27 | Wingrove Well Service, Inc. | Lueders, TX 79533 | Oil & Gas Operator | Nov 2023 |
| 28 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 29 | WJH Energy, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Apr 2024 |
| 30 | Wolfson, I. J. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2002 |
| 31 | Woodbine Petroleum, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Aug 2003 |
| 32 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 33 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |