| 101 | W.J., Inc. | Ellis, KS 67637 | Oil Operator | Jan 2001 |
| 102 | W.L. Ranch Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Dec 2025 |
| 103 | W.O.G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 104 | W.P. Moore, Inc. | | Oil Operator | Dec 1983 |
| 105 | W.P.P.I. Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Jul 2013 |
| 106 | W.R. Guffey LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2020 |
| 107 | W.R.A. Oil Co. | | Oil & Gas Operator | Mar 2025 |
| 108 | W.S. Red Hancock, Inc. | | Oil Operator | Dec 1986 |
| 109 | W.T. Waggoner Estate, Inc. | Vernon, TX 76385 | Oil Operator | Dec 2025 |
| 110 | W.W. Energy | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 111 | W.W.R. Holding, LLC | Coleman, TX 76834 | Oil & Gas Operator | Mar 2008 |
| 112 | W4 Energy, LLC | Humboldt, KS 66748 | Gas Operator | Nov 2015 |
| 113 | Wabash Energy Corporation | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2009 |
| 114 | Wabash Production And Development, Inc. | Fairfield, IL 62837 | Gas Operator | Apr 2002 |
| 115 | Wachob Jack | Sapulpa, OK 74066 | Oil Operator | Dec 2014 |
| 116 | Wachob Oil & Gas LLC | Sapulpa, OK 74066-6987 | Oil Operator | Jun 2015 |
| 117 | Wachtman-Schroed | | Oil Operator | Aug 1986 |
| 118 | Wachtman-Schroeder, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Aug 2025 |
| 119 | Wacker Oil Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 120 | Waco Corp | | Oil Operator | Jun 1983 |
| 121 | Waco Oil | | Oil Operator | Apr 1992 |
| 122 | Waco Oil & Gas Co., Inc. | Glenville, WV 26351-0397 | Oil & Gas Operator | Dec 2021 |
| 123 | Waco Petro, LP | Sulphur SPGS, TX 75483 | Oil Operator | Sep 2015 |
| 124 | Waco Production Co. | Archer City, TX 76351 | Oil & Gas Operator | Sep 1993 |
| 125 | Waddell Norman | Seminole, OK 74868-1244 | Oil & Gas Operator | Nov 1998 |
| 126 | Waddell, Debora | Angola, NY 14059 | Gas Operator | Dec 2024 |
| 127 | Waddell, Eric F. | Natoma, KS 67651 | Oil Operator | Aug 1995 |
| 128 | Waddell, Kent | Abilene, TX 79606 | Oil & Gas Operator | Nov 2010 |
| 129 | Waddy & Son Oilfield Services Inc | Dellroy, OH 44620-9762 | Oil & Gas Operator | Dec 2024 |
| 130 | Wade Energy Corporation | Carlsbad, NM 88220 | Oil & Gas Operator | Sep 1999 |
| 131 | Wade Operating | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 132 | Wade, Jim | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 133 | Wadi Exploration&Production,LLC | San Clemente, CA 92672 | Oil & Gas Operator | Jul 2020 |
| 134 | Wadi Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2025 |
| 135 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 136 | Wadkins T Roy | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2019 |
| 137 | Wadley Bill & Son Drilling Co | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2025 |
| 138 | Waelder Oil & Gas, Inc. | Fort Smith, AR 72903 | Oil & Gas Operator | Oct 2025 |
| 139 | Waffenbauch USA Corp. | Westfield, NY 14787 | Gas Operator | Dec 2024 |
| 140 | Waggner, Fred | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 141 | Waggner, Robert | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2006 |
| 142 | Waggoner Drilling Company | Bristow, OK 74010-0663 | Oil & Gas Operator | Jan 2014 |
| 143 | Waggoner Oil & Gas Corp | Enid, OK 73703-1152 | Oil & Gas Operator | Nov 2025 |
| 144 | Waggoner Operating, L.L.C. | Vernon, TX 76385 | Oil Operator | Dec 2025 |
| 145 | Waggoner, John S. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2017 |
| 146 | Waggoner, Ralph E. | Windthorst, TX 76389 | Oil & Gas Operator | Dec 2010 |
| 147 | Waggoner, W. T., Estate | Vernon, TX 76385 | Oil & Gas Operator | Feb 2018 |
| 148 | Waggoner-Baldridge Energy | | Oil Operator | Jun 1988 |
| 149 | Waggoner-Baldridge Oper. Co, Inc | Dallas, TX 75206 | Oil & Gas Operator | Jan 1998 |
| 150 | Wagman Petroleum, Inc. | Dallas, TX 75202 | Oil & Gas Operator | Dec 2025 |
| 151 | Wagman, Brent A. | Dallas, TX 75202 | Oil & Gas Operator | Dec 2025 |
| 152 | Wagner & Brown | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 153 | Wagner & Brown Limited Partnership | Midland, TX 79701 | Oil & Gas Operator | Feb 2013 |
| 154 | Wagner & Brown LP | Midland, TX 79702-1714 | Oil & Gas Operator | Aug 2022 |
| 155 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 156 | Wagner & Wagner | Indiana, PA 15701-1273 | Gas Operator | Dec 2012 |
| 157 | Wagner And Brown LTD Dba Wagner And Brown LTD | | Oil & Gas Operator | Sep 2002 |
| 158 | Wagner Energy LLC | Enid, OK 73701 | Oil Operator | Oct 2025 |
| 159 | Wagner Gas And Oil LLC | | Oil Operator | Dec 2025 |
| 160 | Wagner Oil And Gas | | Oil & Gas Operator | Dec 2016 |
| 161 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 162 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 163 | Wagon Wheel Arklatex, LLC | | Oil & Gas Operator | May 2018 |
| 164 | Wagon Wheel Production Company | Crawford, OK 73638-9502 | Oil & Gas Operator | Mar 2025 |
| 165 | Wagoner, Walter M | | Oil Operator | Oct 2025 |
| 166 | Wainoco Oil & Ga | | Oil & Gas Operator | Jan 1993 |
| 167 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 168 | Wakefield Oil Company, Inc. | Winfield, KS 67156 | Oil Operator | Aug 1999 |
| 169 | Wako Oil Co. LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 170 | Walbet | Monahans, TX 79756 | Oil & Gas Operator | Dec 1993 |
| 171 | Walbet, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Dec 2025 |
| 172 | Walcher Oil, LC | Bellevue, WA 98009 | Oil & Gas Operator | Aug 2025 |
| 173 | Walcher, Wayne E. | Wichita, KS 67202 | Oil & Gas Operator | May 2024 |
| 174 | Walden E F | Ada, OK 74820 | Oil & Gas Operator | Aug 2014 |
| 175 | Waldron David A | Wooster, OH 44691 | Oil & Gas Operator | Dec 2003 |
| 176 | Waldrop, L. E. | Houston, TX 77024 | Oil & Gas Operator | Jun 1996 |
| 177 | Walgann Oil & Gas Inc | Sperry, OK 74073 | Oil Operator | Aug 2025 |
| 178 | Walkabout Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2025 |
| 179 | Walker Billy R | Henryetta, OK 74437-0026 | Oil & Gas Operator | Sep 2014 |
| 180 | Walker Corporation (The) | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 181 | Walker David Wayne | Okemah, OK 74859-9731 | Oil & Gas Operator | Sep 2022 |
| 182 | Walker Energy Group | Houston, TX 77215-1089 | Oil & Gas Operator | Jun 1992 |
| 183 | Walker Energy, LLC | | Oil & Gas Operator | Nov 2024 |
| 184 | Walker Ervin G | | Oil Operator | Jul 1992 |
| 185 | Walker Explor & Prod Corp | Unknown, UT 99999 | Oil & Gas Operator | Dec 1989 |
| 186 | Walker Gas Company | Romney, WV 25757-0000 | Oil & Gas Operator | Dec 2018 |
| 187 | Walker Jeffery Scott | Owasso, OK 74055-7420 | Oil Operator | Oct 2025 |
| 188 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 189 | Walker L Willis | | Oil Operator | Dec 1985 |
| 190 | Walker La. Properties | | Oil & Gas Operator | Oct 1990 |
| 191 | Walker Management Company | | Oil & Gas Operator | Apr 1988 |
| 192 | Walker Oil & Gas | Early, TX 76802 | Oil & Gas Operator | Dec 2002 |
| 193 | Walker Oil & Gas Corporaton | Roswell, NM 88202 | Oil & Gas Operator | Oct 1998 |
| 194 | Walker Oil And Gas Inc | | Oil & Gas Operator | Jun 2021 |
| 195 | Walker Oil And Gas LTD | Snyder, TX 79550 | Oil Operator | Dec 2025 |
| 196 | Walker Operating (I) | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 197 | Walker Paul | Duncan, OK 73533-9782 | Oil & Gas Operator | Feb 2022 |
| 198 | Walker Resources Co, LLC | | Oil & Gas Operator | Dec 2013 |
| 199 | Walker Tank Service, Inc | Utica, KS 67584 | Oil Operator | Aug 2022 |
| 200 | Walker Well Service Inc | Big Bend, WV 26136-0000 | Oil & Gas Operator | Dec 2021 |