| 1 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Apr 2024 |
| 2 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 3 | Walton Producing Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2005 |
| 4 | Walton Producing Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 5 | WBR, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 1995 |
| 6 | Weakland Investments, Inc. | Denver, CO 80215 | Oil & Gas Operator | Apr 2024 |
| 7 | Weaver Global Operating, LLC | Colleyville, TX 76034 | Oil Operator | Apr 2024 |
| 8 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 9 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 10 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 11 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 12 | Western Sky Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 13 | Westico Energy Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2004 |
| 14 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 15 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 16 | WG Operating, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | May 2012 |
| 17 | Wheeler Operating Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2024 |
| 18 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 19 | Wilcox Energy Company LLC | Rule, TX 79547 | Oil & Gas Operator | Apr 2024 |
| 20 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 21 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Apr 2024 |
| 22 | Williams Deville Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2024 |
| 23 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 24 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 25 | Wingrove Operating, LLC | Odessa, TX 79760 | Oil Operator | Apr 2024 |
| 26 | Wingrove Well Service, Inc. | Lueders, TX 79533 | Oil & Gas Operator | Nov 2023 |
| 27 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 28 | Wortham, E. H. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |