| 1 | W-N Energy Corp | Tulsa, OK 74121-1468 | Oil & Gas Operator | Nov 1994 |
| 2 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Jun 2025 |
| 3 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 4 | Walterscheid, A. D. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2014 |
| 5 | Walterscheid, R. F. | Muenster, TX 76252 | Oil & Gas Operator | Oct 1993 |
| 6 | Waylander LLC | Plano, TX 75025 | Oil & Gas Operator | Jun 2025 |
| 7 | WBH Energy Partners LLC | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 8 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Mar 2025 |
| 9 | Westbrook Oil & Gas Co. Inc. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2025 |
| 10 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 11 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 12 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 13 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jun 2025 |
| 14 | Whittington Energy Co. | Melbourne, FL 32901 | Oil & Gas Operator | Jun 2025 |
| 15 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2025 |
| 16 | Window Operating Co., The | Coleman, TX 76834 | Oil & Gas Operator | Jun 2025 |
| 17 | WLH Production LLC | Gainesville, TX 76240 | Oil Operator | Jun 2025 |
| 18 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Jun 2025 |