| 1 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 2 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 3 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 4 | Walsh Resources, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Dec 2024 |
| 5 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2024 |
| 6 | West Mountain Operating Co, Inc. | Longview, TX 75604 | Oil & Gas Operator | Feb 2019 |
| 7 | Western Energy Group, LLC | Leander, TX 78641 | Oil & Gas Operator | Dec 2024 |
| 8 | White Oak Production Company | Conway, AR 72034 | Oil & Gas Operator | Sep 2005 |
| 9 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 10 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Dec 2024 |
| 11 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Dec 2024 |
| 12 | Wilson Hydrocarbon Inc. | Houston, TX 77066 | Oil & Gas Operator | Dec 2024 |
| 13 | Wilson Operating Service Inc | Brownfield, TX 79316 | Oil & Gas Operator | Aug 2003 |
| 14 | Wilson, Don H., Inc. | Elkhart, TX 75839 | Oil & Gas Operator | May 2019 |
| 15 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 16 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2024 |
| 17 | Winston Land & Cattle Co., Inc. | Lufkin, TX 75901 | Oil & Gas Operator | Feb 2001 |
| 18 | Winston Land & Cattle I, LTD. | Lufkin, TX 75902 | Oil & Gas Operator | Nov 2014 |
| 19 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 20 | WJW Operating Co.,LLC | Austin, TX 78738 | Oil & Gas Operator | May 2002 |
| 21 | Wmo Oil, LLC | Kilgore, TX 75663 | Oil Operator | Dec 2024 |