| 1 | W & T Offshore, Inc. | Houston, TX 77057 | Oil & Gas Operator | Dec 2024 |
| 2 | W & W Oil & Gas LLC | Wynona, OK 74084 | Oil Operator | Sep 2024 |
| 3 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 4 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Dec 2024 |
| 5 | Walsh Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2022 |
| 6 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Sep 2024 |
| 7 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 8 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 9 | Wheeler Operating Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2024 |
| 10 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Dec 2024 |
| 11 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 12 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 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 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |