| 1 | W & K Oil Co. | | Oil & Gas Operator | Jun 1989 |
| 2 | W & L Oil Co. | | Oil Operator | Aug 1995 |
| 3 | W M Smith | | Oil Operator | Jun 1989 |
| 4 | W&W Oil Co | Denver City, TX 79323 | Oil Operator | Jun 2002 |
| 5 | W. A. Parker | | Oil & Gas Operator | Jan 1981 |
| 6 | W. A. Stanberry | | Oil & Gas Operator | Nov 1988 |
| 7 | W. C. Allen | | Oil & Gas Operator | Dec 2024 |
| 8 | W. C. Emmons | | Oil Operator | Jan 2025 |
| 9 | W. E. Orr | | Oil & Gas Operator | Dec 2024 |
| 10 | W. H. Beene | | Oil & Gas Operator | Jan 2025 |
| 11 | W. S. Hale Petroleum | | Oil & Gas Operator | Jul 2015 |
| 12 | W. S. Hale Petroleum, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 13 | W. W. Melton | | Oil Operator | Sep 1983 |
| 14 | Wagon Wheel Arklatex, LLC | | Oil & Gas Operator | May 2018 |
| 15 | Walker Management Company | | Oil & Gas Operator | Apr 1988 |
| 16 | Wallace D. Putman, Jr. | | Oil Operator | Jan 2025 |
| 17 | Walters Production | | Oil Operator | Mar 2005 |
| 18 | Watson Oil & Gas Corp. | | Oil Operator | Aug 1994 |
| 19 | Watts And Hill Oil Company | | Oil Operator | Sep 1995 |
| 20 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 21 | Weathersby Oil Co. | | Oil Operator | Oct 2001 |
| 22 | Weaver Bros | | Oil Operator | Nov 1987 |
| 23 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Oct 2025 |
| 24 | Wesla Oil & Gas Co., Inc. | | Oil & Gas Operator | Jun 2001 |
| 25 | Wessely Energy Company | Dallas, TX 75206 | Oil & Gas Operator | May 2001 |
| 26 | White Contracting Co., Inc. | | Oil Operator | Jan 1991 |
| 27 | White Horse Energy Inc. | | Oil & Gas Operator | Jun 1989 |
| 28 | Whitton Company, Inc. | | Oil & Gas Operator | Jul 2020 |
| 29 | Wilcox Operating Corporation | Shreveport, LA 71115 | Oil & Gas Operator | Oct 2025 |
| 30 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 31 | Wilkerson Oil Company | | Oil Operator | Dec 1991 |
| 32 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Oct 2025 |
| 33 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Oct 2025 |
| 34 | William D. Pittman | | Oil & Gas Operator | Jun 1991 |
| 35 | William Marvin Hobbs, SR. | | Oil Operator | Aug 2002 |
| 36 | Williams Pressure Service Co. | | Oil Operator | Sep 1985 |
| 37 | Williamson Oil & Gas, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Dec 2024 |
| 38 | Wilson Well Service | Loco, OK 73442-0114 | Oil & Gas Operator | Mar 2018 |
| 39 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 40 | Woodall Oil Company | | Oil Operator | Sep 2010 |
| 41 | Woodbine Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 42 | Woodland Hills Oil & Gas, LLC | | Oil Operator | Dec 2024 |
| 43 | Wooldridge Land & Cattle, LLC | | Oil Operator | Jan 2025 |
| 44 | Wooldridge Production Co.,LTD. | | Oil & Gas Operator | Apr 2008 |
| 45 | WSF, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2013 |
| 46 | Wytex Production Corporation | Fort Smith, AR 72903 | Oil & Gas Operator | Jun 2025 |