| 30301 | W W Energy Corp | | Oil & Gas Operator | Jan 2026 |
| 30302 | W W Energy Corp And Flynn Energy | | Oil & Gas Operator | Oct 2024 |
| 30303 | W W Pet Service, Inc | Dixon, KY 42409 | Oil & Gas Operator | Dec 2019 |
| 30304 | W&S Energy LLC | Woodward, OK 73801 | Oil & Gas Operator | Sep 2022 |
| 30305 | W&T Offshore, Inc. | Houston, TX 77057 | Oil & Gas Operator | May 2026 |
| 30306 | W&W Oil And Gas, Inc. | Muenster, TX 76252 | Oil Operator | May 2026 |
| 30307 | W&W Oil Co | Denver City, TX 79323 | Oil Operator | Jun 2002 |
| 30308 | W-N Energy Corp | Tulsa, OK 74121-1468 | Oil & Gas Operator | Nov 1994 |
| 30309 | W-R Oil Company | | Oil Operator | Jul 1990 |
| 30310 | W. A. Boser Oil | Allegany, NY 14706 | Oil Operator | Dec 2024 |
| 30311 | W. A. Moncrief | | Oil & Gas Operator | Jun 2010 |
| 30312 | W. A. Parker | | Oil & Gas Operator | Jan 1981 |
| 30313 | W. A. Stanberry | | Oil & Gas Operator | Nov 1988 |
| 30314 | W. B. D. Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 1995 |
| 30315 | W. B. Jayred | | Oil & Gas Operator | Aug 1982 |
| 30316 | W. B. McCarter, Jr., Inc. | | Oil & Gas Operator | Dec 1995 |
| 30317 | W. C. Allen | | Oil & Gas Operator | Dec 2024 |
| 30318 | W. C. Emmons | | Oil Operator | Jan 2025 |
| 30319 | W. D. Henry & Sons, Inc. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 30320 | W. D. Roberson | | Gas Operator | Mar 2021 |
| 30321 | W. D. Short Oil Co. | | Oil Operator | Apr 2004 |
| 30322 | W. D. Tarver | | Oil Operator | Aug 2005 |
| 30323 | W. E. B. Well Tending Service, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Nov 2011 |
| 30324 | W. E. O'Malley Inc. | | Oil & Gas Operator | Jun 1991 |
| 30325 | W. E. Orr | | Oil & Gas Operator | Dec 2024 |
| 30326 | W. G. Darsey, III | | Oil & Gas Operator | Nov 1981 |
| 30327 | W. H. Beene | | Oil & Gas Operator | Jan 2025 |
| 30328 | W. H. Hunt | | Oil & Gas Operator | Jan 1984 |
| 30329 | W. H. Hunt Trust Estate | | Oil & Gas Operator | Mar 1997 |
| 30330 | W. H. Hunt, Et Al | | Oil & Gas Operator | Jul 1990 |
| 30331 | W. Harlan Beene | | Oil Operator | Jan 2025 |
| 30332 | W. Harlan Beene Et Al | | Oil Operator | Dec 2002 |
| 30333 | W. J. Hamilton Operator | | Oil Operator | Aug 1978 |
| 30334 | W. J. Wegman, Jr. | | Gas Operator | Dec 1991 |
| 30335 | W. L. Estis | | Oil & Gas Operator | Dec 1999 |
| 30336 | W. L. Puls & T. D. Rush | | Oil & Gas Operator | Dec 1980 |
| 30337 | W. L. Rambo | | Oil Operator | Apr 1981 |
| 30338 | W. L. Rambo, Inc. | | Oil & Gas Operator | Aug 1985 |
| 30339 | W. M. Elliott Jr. | | Oil & Gas Operator | Dec 2009 |
| 30340 | W. M. Inabnet Agent | | Gas Operator | Oct 1985 |
| 30341 | W. M. Morgan | | Oil Operator | Jan 1985 |
| 30342 | W. R. Dudley | | Oil & Gas Operator | Dec 2025 |
| 30343 | W. R. G. Oil & Gas, Inc. | Arlington, TX 76013 | Oil & Gas Operator | Dec 1993 |
| 30344 | W. R. Jennings, Jr. | | Oil Operator | Aug 2003 |
| 30345 | W. R. Williams, Inc. | Amarillo, TX 79105 | Gas Operator | Dec 2019 |
| 30346 | W. S. Hale Petroleum | | Oil & Gas Operator | Jul 2015 |
| 30347 | W. S. Hale Petroleum, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 30348 | W. T. Boyle & Co. | Graham, TX 76450 | Oil Operator | Mar 2008 |
| 30349 | W. T. Waggoner Estate | | Oil & Gas Operator | Dec 1995 |
| 30350 | W. Trich & Hallwell, Inc. | | Oil & Gas Operator | Oct 1988 |
| 30351 | W. W. F. Oil Corporation | | Oil & Gas Operator | Dec 1999 |
| 30352 | W. W. Melton | | Oil Operator | Sep 1983 |
| 30353 | W.A. Oil Co. | Andrews, TX 79714 | Oil & Gas Operator | Aug 1997 |
| 30354 | W.B.D. Oil And Gas Inc. | Pampa, TX 79066 | Oil & Gas Operator | Oct 2019 |
| 30355 | W.D. Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2001 |
| 30356 | W.D. Short Oil Co., LLC | Oxford, KS 67119 | Oil & Gas Operator | Jan 2026 |
| 30357 | W.E.S. Operating Company, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2011 |
| 30358 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 30359 | W.I. Royalty, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Nov 2009 |
| 30360 | W.I.F.T. Operating, LLC | | Oil & Gas Operator | Dec 2025 |
| 30361 | W.J., Inc. | Ellis, KS 67637 | Oil Operator | Jan 2001 |
| 30362 | W.L. Ranch Inc. | Caldwell, TX 77836 | Oil & Gas Operator | May 2026 |
| 30363 | W.O.G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 30364 | W.P. Moore, Inc. | | Oil Operator | Dec 1983 |
| 30365 | W.P.P.I. Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Jul 2013 |
| 30366 | W.R. Guffey LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2020 |
| 30367 | W.R.A. Oil Co. | | Oil & Gas Operator | Mar 2025 |
| 30368 | W.S. Red Hancock, Inc. | | Oil Operator | Dec 1986 |
| 30369 | W.T. Waggoner Estate, Inc. | Vernon, TX 76385 | Oil Operator | May 2026 |
| 30370 | W.W. Energy | Luling, TX 78648 | Oil & Gas Operator | May 2026 |
| 30371 | W.W.R. Holding, LLC | Coleman, TX 76834 | Oil & Gas Operator | Mar 2008 |
| 30372 | W4 Energy, LLC | Humboldt, KS 66748 | Gas Operator | Nov 2015 |
| 30373 | Wabash Energy Corporation | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2009 |
| 30374 | Wachob Jack | Sapulpa, OK 74066 | Oil Operator | Dec 2014 |
| 30375 | Wachob Oil & Gas LLC | Sapulpa, OK 74066-6987 | Oil Operator | Jun 2015 |
| 30376 | Wachtman-Schroed | | Oil Operator | Aug 1986 |
| 30377 | Wachtman-Schroeder, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Dec 2025 |
| 30378 | Wacker Oil Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 30379 | Waco Corp | | Oil Operator | Jun 1983 |
| 30380 | Waco Oil | | Oil Operator | Apr 1992 |
| 30381 | Waco Oil & Gas Co., Inc. | Glenville, WV 26351-0397 | Oil & Gas Operator | Dec 2021 |
| 30382 | Waco Petro, LP | Sulphur SPGS, TX 75483 | Oil Operator | Sep 2015 |
| 30383 | Waco Production Co. | Archer City, TX 76351 | Oil & Gas Operator | Sep 1993 |
| 30384 | Waddell Norman | Seminole, OK 74868-1244 | Oil & Gas Operator | Nov 1998 |
| 30385 | Waddell, Eric F. | Natoma, KS 67651 | Oil Operator | Aug 1995 |
| 30386 | Waddell, Kent | Abilene, TX 79606 | Oil & Gas Operator | Nov 2010 |
| 30387 | Waddy & Son Oilfield Services Inc | Dellroy, OH 44620-9762 | Oil & Gas Operator | Dec 2025 |
| 30388 | Wade Energy Corporation | Carlsbad, NM 88220 | Oil & Gas Operator | Sep 1999 |
| 30389 | Wade Operating | Breckenridge, TX 76424 | Oil & Gas Operator | May 2026 |
| 30390 | Wade, Jim | Olney, TX 76374 | Oil & Gas Operator | May 2026 |
| 30391 | Wadi Exploration&Production,LLC | San Clemente, CA 92672 | Oil & Gas Operator | Jul 2020 |
| 30392 | Wadi Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | May 2026 |
| 30393 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 30394 | Wadkins T Roy | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2019 |
| 30395 | Wadley Bill & Son Drilling Co | Okmulgee, OK 74447 | Oil & Gas Operator | Feb 2026 |
| 30396 | Waelder Oil & Gas, Inc. | Fort Smith, AR 72903 | Oil & Gas Operator | Feb 2026 |
| 30397 | Waffenbauch USA Corp. | Westfield, NY 14787 | Gas Operator | Dec 2024 |
| 30398 | Waggner, Fred | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2026 |
| 30399 | Waggner, Robert | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2006 |
| 30400 | Waggoner Drilling Company | Bristow, OK 74010-0663 | Oil & Gas Operator | Jan 2014 |