| 30101 | W-R Oil Company | | Oil Operator | Jul 1990 |
| 30102 | W. A. Boser Oil | Allegany, NY 14706 | Oil Operator | Dec 2022 |
| 30103 | W. A. Moncrief | | Oil & Gas Operator | Jun 2010 |
| 30104 | W. A. Moncrief, Jr. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2024 |
| 30105 | W. A. Parker | | Oil & Gas Operator | Jan 1981 |
| 30106 | W. A. Stanberry | | Oil & Gas Operator | Nov 1988 |
| 30107 | W. B. D. Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 1995 |
| 30108 | W. B. Jayred | | Oil & Gas Operator | Aug 1982 |
| 30109 | W. B. McCarter, Jr., Inc. | | Oil & Gas Operator | Dec 1995 |
| 30110 | W. C. Allen | | Oil & Gas Operator | Dec 2023 |
| 30111 | W. C. Emmons | | Oil Operator | Dec 2023 |
| 30112 | W. D. Henry & Sons, Inc. | Eden, NY 14057 | Gas Operator | Dec 2022 |
| 30113 | W. D. Roberson | | Gas Operator | Jan 2020 |
| 30114 | W. D. Short Oil Co. | | Oil Operator | Apr 2004 |
| 30115 | W. D. Tarver | | Oil Operator | Aug 2005 |
| 30116 | W. E. B. Well Tending Service, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Nov 2011 |
| 30117 | W. E. O'Malley, Inc. | | Oil & Gas Operator | Jun 1991 |
| 30118 | W. E. Orr | | Oil & Gas Operator | Dec 2023 |
| 30119 | W. G. Darsey, III | | Oil & Gas Operator | Nov 1981 |
| 30120 | W. H. Beene | | Oil & Gas Operator | Jan 2024 |
| 30121 | W. H. Hunt | | Oil & Gas Operator | Jan 1984 |
| 30122 | W. H. Hunt Trust Estate | | Oil & Gas Operator | Mar 1997 |
| 30123 | W. H. Hunt, Et Al | | Oil & Gas Operator | Jul 1990 |
| 30124 | W. Harlan Beene | | Oil Operator | Jan 2024 |
| 30125 | W. Harlan Beene Et Al | | Oil Operator | Dec 2002 |
| 30126 | W. J. Hamilton Operator | | Oil Operator | Aug 1978 |
| 30127 | W. J. Wegman, Jr. | | Gas Operator | Dec 1991 |
| 30128 | W. L. Estis | | Oil & Gas Operator | Dec 1999 |
| 30129 | W. L. Puls & T. D. Rush | | Oil & Gas Operator | Dec 1980 |
| 30130 | W. L. Rambo | | Oil Operator | Apr 1981 |
| 30131 | W. L. Rambo, Inc. | | Oil & Gas Operator | Aug 1985 |
| 30132 | W. M. Elliott Jr. | | Oil & Gas Operator | Dec 2009 |
| 30133 | W. M. Inabnet Agent | | Gas Operator | Oct 1985 |
| 30134 | W. M. Morgan | | Oil Operator | Jan 1985 |
| 30135 | W. R. Dudley | | Oil & Gas Operator | Nov 2023 |
| 30136 | W. R. G. Oil & Gas, Inc. | Arlington, TX 76013 | Oil & Gas Operator | Dec 1993 |
| 30137 | W. R. Jennings, Jr. | | Oil Operator | Aug 2003 |
| 30138 | W. R. Williams, Inc. | Amarillo, TX 79105 | Gas Operator | Dec 2023 |
| 30139 | W. S. Hale Petroleum | | Oil & Gas Operator | Jul 2015 |
| 30140 | W. S. Hale Petroleum, L.L.C. | | Oil & Gas Operator | Jan 2024 |
| 30141 | W. T. Waggoner Estate | | Oil & Gas Operator | Nov 1995 |
| 30142 | W. Trich & Hallwell, Inc. | | Oil & Gas Operator | Oct 1988 |
| 30143 | W. W. F. Oil Corporation | | Oil & Gas Operator | Dec 1999 |
| 30144 | W. W. Melton | | Oil Operator | Sep 1983 |
| 30145 | W.A. Oil Co. | Andrews, TX 79714 | Oil & Gas Operator | Aug 1997 |
| 30146 | W.B.D. Oil And Gas Inc. | Pampa, TX 79066 | Oil & Gas Operator | Oct 2019 |
| 30147 | W.D. Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2001 |
| 30148 | W.D. Short Oil Co., LLC | Oxford, KS 67119 | Oil & Gas Operator | Dec 2023 |
| 30149 | W.E.S. Operating Company, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2011 |
| 30150 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 30151 | W.I. Royalty, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Nov 2009 |
| 30152 | W.I.F.T. Operating, LLC | | Oil & Gas Operator | Feb 2024 |
| 30153 | W.J., Inc. | Ellis, KS 67637 | Oil Operator | Jan 2001 |
| 30154 | W.L. Ranch Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Apr 2024 |
| 30155 | W.O.G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 30156 | W.P. Moore, Inc. | | Oil Operator | Dec 1983 |
| 30157 | W.P.P.I. Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Jul 2013 |
| 30158 | W.R. Guffey LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2020 |
| 30159 | W.R.A. Oil Co. | | Oil & Gas Operator | Dec 2023 |
| 30160 | W.S. Red Hancock, Inc. | | Oil Operator | Dec 1986 |
| 30161 | W.T. Waggoner Estate, Inc. | Vernon, TX 76385 | Oil Operator | Apr 2024 |
| 30162 | W.W. Energy | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 30163 | W.W.R. Holding, LLC | Coleman, TX 76834 | Oil & Gas Operator | Mar 2008 |
| 30164 | W4 Energy, LLC | Humboldt, KS 66748 | Gas Operator | Nov 2015 |
| 30165 | Wabash Energy Corporation | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2009 |
| 30166 | Wabco Production Company | | Oil Operator | Jul 2021 |
| 30167 | Wachob Jack | Sapulpa, OK 74066 | Oil Operator | Dec 2014 |
| 30168 | Wachob Oil & Gas LLC | | Oil Operator | Jun 2015 |
| 30169 | Wachtman-Schroed | | Oil Operator | Aug 1986 |
| 30170 | Wachtman-Schroeder, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Nov 2023 |
| 30171 | Wacker Oil Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 30172 | Waco Corp | | Oil Operator | Jun 1983 |
| 30173 | Waco Oil | | Oil Operator | Apr 1992 |
| 30174 | Waco Oil & Gas Co., Inc. | Glenville, WV 26351-0397 | Oil & Gas Operator | Dec 2021 |
| 30175 | Waco Petro, LP | Sulphur SPGS, TX 75483 | Oil Operator | Sep 2015 |
| 30176 | Waco Production Co. | Archer City, TX 76351 | Oil & Gas Operator | Sep 1993 |
| 30177 | Waddell Norman | Seminole, OK 74868-1244 | Oil & Gas Operator | Nov 1998 |
| 30178 | Waddell, Debora | Angola, NY 14059 | Gas Operator | Dec 2022 |
| 30179 | Waddell, Eric F. | Natoma, KS 67651 | Oil Operator | Aug 1995 |
| 30180 | Waddell, Kent | Abilene, TX 79606 | Oil & Gas Operator | Nov 2010 |
| 30181 | Waddy & Son Oilfield Services Inc | Dellroy, OH 44620-9762-9762 | Oil & Gas Operator | Dec 2023 |
| 30182 | Wade Energy Corporation | Carlsbad, NM 88220 | Oil & Gas Operator | Sep 1999 |
| 30183 | Wade Operating | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 30184 | Wade, Jim | Olney, TX 76374 | Oil & Gas Operator | Apr 2024 |
| 30185 | Wadi Exploration&Production,LLC | San Clemente, CA 92672 | Oil & Gas Operator | Jul 2020 |
| 30186 | Wadi Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Apr 2024 |
| 30187 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 30188 | Wadkins T Roy | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2019 |
| 30189 | Wadley Bill & Son Drilling Co | Okmulgee, OK 74447-8934 | Oil & Gas Operator | Jan 2024 |
| 30190 | Waelder Oil & Gas, Inc. | Fort Smith, AR 72903 | Oil & Gas Operator | Jan 2024 |
| 30191 | Waffenbauch USA Corp. | Westfield, NY 14787 | Gas Operator | Dec 2022 |
| 30192 | Waggner, Fred | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 30193 | Waggner, Robert | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2006 |
| 30194 | Waggoner Drilling Company | Bristow, OK 74010-0663 | Oil & Gas Operator | Jan 2014 |
| 30195 | Waggoner Oil & Gas Corp | Enid, OK 73703-1152 | Oil & Gas Operator | Feb 2024 |
| 30196 | Waggoner, John S. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2017 |
| 30197 | Waggoner, Ralph E. | Windthorst, TX 76389 | Oil & Gas Operator | Dec 2010 |
| 30198 | Waggoner, W. T., Estate | Vernon, TX 76385 | Oil & Gas Operator | Feb 2018 |
| 30199 | Waggoner-Baldridge Energy | | Oil Operator | Jun 1988 |
| 30200 | Waggoner-Baldridge Oper. Co, Inc | Dallas, TX 75206 | Oil & Gas Operator | Jan 1998 |