| 31101 | W C T Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 31102 | W D L Enterprises, Inc | | Oil & Gas Operator | Apr 1983 |
| 31103 | W E Jeffers | Artesia, NM 88210 | Oil Operator | Nov 2004 |
| 31104 | W H Brininstool | Jal, NM 88252 | Oil & Gas Operator | Aug 2006 |
| 31105 | W H Patten Drilling Co | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2024 |
| 31106 | W J Sweatt | Artesoa, NM 88211 | Oil Operator | Oct 2020 |
| 31107 | W K Frost Inc | Newark, OH 43055 | Oil & Gas Operator | Dec 2020 |
| 31108 | W M A Corporation | Wichita, KS 67278-1713 | Oil & Gas Operator | Jan 1998 |
| 31109 | W M Energy Corp | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2015 |
| 31110 | W M Gallaway | Farmington, NM 874990307 | Oil & Gas Operator | Jun 2013 |
| 31111 | W M Petroleum LLC | Cedar Vale, KS 67024 | Oil Operator | Feb 2025 |
| 31112 | W M Smith | | Oil Operator | Jun 1989 |
| 31113 | W P Brown Enterprises Inc | Byesville, OH 43723 | Oil & Gas Operator | Dec 2024 |
| 31114 | W P Oil & Gas LLC | Coweta, OK 74429-5465 | Oil & Gas Operator | Mar 2015 |
| 31115 | W R Ericksen | Hobbs, NM 882411109 | Oil & Gas Operator | Jul 1994 |
| 31116 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 31117 | W T X Capital Investments, LLC | Wichita Falls, TX 76308 | Oil Operator | Jun 2025 |
| 31118 | W W Energy Corp | | Oil & Gas Operator | Mar 2025 |
| 31119 | W W Energy Corp And Flynn Energy | | Oil & Gas Operator | Oct 2024 |
| 31120 | W W Pet Service, Inc | Dixon, KY 42409 | Oil & Gas Operator | Dec 2022 |
| 31121 | W&S Energy LLC | Woodward, OK 73801 | Oil & Gas Operator | Sep 2022 |
| 31122 | W&W Oil And Gas, Inc. | Muenster, TX 76252 | Oil Operator | Jun 2025 |
| 31123 | W&W Oil Co | Denver City, TX 79323 | Oil Operator | Jun 2002 |
| 31124 | W-N Energy Corp | Tulsa, OK 74121-1468 | Oil & Gas Operator | Nov 1994 |
| 31125 | W-R Oil Company | | Oil Operator | Jul 1990 |
| 31126 | W. A. Boser Oil | Allegany, NY 14706 | Oil Operator | Dec 2023 |
| 31127 | W. A. Moncrief | | Oil & Gas Operator | Jun 2010 |
| 31128 | W. A. Moncrief, Jr. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 31129 | W. A. Parker | | Oil & Gas Operator | Jan 1981 |
| 31130 | W. A. Stanberry | | Oil & Gas Operator | Nov 1988 |
| 31131 | W. B. D. Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 1995 |
| 31132 | W. B. Inabnet | | Gas Operator | Oct 1985 |
| 31133 | W. B. Jayred | | Oil & Gas Operator | Aug 1982 |
| 31134 | W. B. McCarter, Jr., Inc. | | Oil & Gas Operator | Dec 1995 |
| 31135 | W. C. Allen | | Oil & Gas Operator | Dec 2024 |
| 31136 | W. C. Emmons | | Oil Operator | Jan 2025 |
| 31137 | W. D. Henry & Sons, Inc. | Eden, NY 14057 | Gas Operator | Dec 2023 |
| 31138 | W. D. Roberson | | Gas Operator | Mar 2021 |
| 31139 | W. D. Short Oil Co. | | Oil Operator | Apr 2004 |
| 31140 | W. D. Tarver | | Oil Operator | Aug 2005 |
| 31141 | W. E. B. Well Tending Service, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Nov 2011 |
| 31142 | W. E. O'Malley, Inc. | | Oil & Gas Operator | Jun 1991 |
| 31143 | W. E. Orr | | Oil & Gas Operator | Dec 2024 |
| 31144 | W. G. Darsey, III | | Oil & Gas Operator | Nov 1981 |
| 31145 | W. H. Beene | | Oil & Gas Operator | Jan 2025 |
| 31146 | W. H. Hunt | | Oil & Gas Operator | Jan 1984 |
| 31147 | W. H. Hunt Trust Estate | | Oil & Gas Operator | Mar 1997 |
| 31148 | W. H. Hunt, Et Al | | Oil & Gas Operator | Jul 1990 |
| 31149 | W. Harlan Beene | | Oil Operator | Jan 2025 |
| 31150 | W. Harlan Beene Et Al | | Oil Operator | Dec 2002 |
| 31151 | W. J. Hamilton Operator | | Oil Operator | Aug 1978 |
| 31152 | W. J. Wegman, Jr. | | Gas Operator | Dec 1991 |
| 31153 | W. L. Estis | | Oil & Gas Operator | Dec 1999 |
| 31154 | W. L. Puls & T. D. Rush | | Oil & Gas Operator | Dec 1980 |
| 31155 | W. L. Rambo | | Oil Operator | Apr 1981 |
| 31156 | W. L. Rambo, Inc. | | Oil & Gas Operator | Aug 1985 |
| 31157 | W. M. Elliott Jr. | | Oil & Gas Operator | Dec 2009 |
| 31158 | W. M. Inabnet Agent | | Gas Operator | Oct 1985 |
| 31159 | W. M. Morgan | | Oil Operator | Jan 1985 |
| 31160 | W. R. Dudley | | Oil & Gas Operator | Mar 2025 |
| 31161 | W. R. G. Oil & Gas, Inc. | Arlington, TX 76013 | Oil & Gas Operator | Dec 1993 |
| 31162 | W. R. Jennings, Jr. | | Oil Operator | Aug 2003 |
| 31163 | W. R. Williams, Inc. | Amarillo, TX 79105 | Gas Operator | Dec 2019 |
| 31164 | W. S. Hale Petroleum | | Oil & Gas Operator | Jul 2015 |
| 31165 | W. S. Hale Petroleum, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 31166 | W. T. Waggoner Estate | | Oil & Gas Operator | Dec 1995 |
| 31167 | W. Trich & Hallwell, Inc. | | Oil & Gas Operator | Oct 1988 |
| 31168 | W. W. F. Oil Corporation | | Oil & Gas Operator | Dec 1999 |
| 31169 | W. W. Melton | | Oil Operator | Sep 1983 |
| 31170 | W.A. Oil Co. | Andrews, TX 79714 | Oil & Gas Operator | Aug 1997 |
| 31171 | W.B.D. Oil And Gas Inc. | Pampa, TX 79066 | Oil & Gas Operator | Oct 2019 |
| 31172 | W.D. Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2001 |
| 31173 | W.D. Short Oil Co., LLC | Oxford, KS 67119 | Oil & Gas Operator | Feb 2025 |
| 31174 | W.E.S. Operating Company, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2011 |
| 31175 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 31176 | W.I. Royalty, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Nov 2009 |
| 31177 | W.I.F.T. Operating, LLC | | Oil & Gas Operator | Apr 2025 |
| 31178 | W.J., Inc. | Ellis, KS 67637 | Oil Operator | Jan 2001 |
| 31179 | W.L. Ranch Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Jun 2025 |
| 31180 | W.O.G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 31181 | W.P. Moore, Inc. | | Oil Operator | Dec 1983 |
| 31182 | W.P.P.I. Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Jul 2013 |
| 31183 | W.R. Guffey LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2020 |
| 31184 | W.R.A. Oil Co. | | Oil & Gas Operator | Feb 2025 |
| 31185 | W.S. Red Hancock, Inc. | | Oil Operator | Dec 1986 |
| 31186 | W.T. Waggoner Estate, Inc. | Vernon, TX 76385 | Oil Operator | Jun 2025 |
| 31187 | W.W. Energy | Luling, TX 78648 | Oil & Gas Operator | Jun 2025 |
| 31188 | W.W.R. Holding, LLC | Coleman, TX 76834 | Oil & Gas Operator | Mar 2008 |
| 31189 | W4 Energy, LLC | Humboldt, KS 66748 | Gas Operator | Nov 2015 |
| 31190 | W5 Oil, LLC | Olpe, KS 66865 | Oil Operator | Jan 2025 |
| 31191 | Wabash Energy Corporation | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2009 |
| 31192 | Wabash Production And Development, Inc. | Fairfield, IL 62837 | Gas Operator | Apr 2002 |
| 31193 | Wachob Jack | Sapulpa, OK 74066 | Oil Operator | Dec 2014 |
| 31194 | Wachob Oil & Gas LLC | Sapulpa, OK 74066-6987 | Oil Operator | Jun 2015 |
| 31195 | Wachtman-Schroed | | Oil Operator | Aug 1986 |
| 31196 | Wachtman-Schroeder, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Feb 2025 |
| 31197 | Wacker Oil Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 31198 | Waco Corp | | Oil Operator | Jun 1983 |
| 31199 | Waco Oil | | Oil Operator | Apr 1992 |
| 31200 | Waco Oil & Gas Co., Inc. | Glenville, WV 26351-0397 | Oil & Gas Operator | Dec 2021 |