| 12301 | Whitlock, J.R. Operator | Amarillo, TX 79105 | Gas Operator | Jul 1997 |
| 12302 | Whitman-Dome Energy Corporation | San Diego, CA 92101 | Oil & Gas Operator | Nov 1996 |
| 12303 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 12304 | Whitson, James A., Jr. | Houston, TX 77063 | Oil & Gas Operator | Nov 2011 |
| 12305 | Whitt Investments, Inc. | Graham, TX 76450 | Oil Operator | Dec 2019 |
| 12306 | Whitt Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 12307 | Whitt, W. J. | Albany, TX 76430 | Oil & Gas Operator | Nov 1996 |
| 12308 | Whitten Energy Corp. | Houston, TX 77090 | Oil & Gas Operator | Dec 2025 |
| 12309 | Whittier Operating Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2007 |
| 12310 | Whittington Energy Co. | Melbourne, FL 32901 | Oil & Gas Operator | Dec 2025 |
| 12311 | Whittington Operating Company | Houston, TX 77069 | Oil & Gas Operator | Dec 2025 |
| 12312 | Whittington, G. R. | Amarillo, TX 79109 | Oil & Gas Operator | Jan 1994 |
| 12313 | Whittington, G. R. Estate | Amarillo, TX 79109 | Oil & Gas Operator | Mar 2008 |
| 12314 | Whittington, James C., Inc. | Dallas, TX 75214 | Oil & Gas Operator | Jan 2017 |
| 12315 | WHL Oil Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1998 |
| 12316 | Wichita Falls Oil Expl. Co. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 12317 | Wichita Operating Company, Inc. | Spring, TX 77393 | Oil & Gas Operator | May 2009 |
| 12318 | Wigington, James Robert | Ackerly, TX 79713 | Oil & Gas Operator | Aug 2003 |
| 12319 | Wilbanks Energy Corporation | Houston, TX 77036 | Oil & Gas Operator | Dec 2001 |
| 12320 | Wilbanks Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 12321 | Wilbanks Reserve Corporation | Denver, CO 80203 | Oil & Gas Operator | Dec 2025 |
| 12322 | Wilbanks, Bruce & G.L. | Midland, TX 79702 | Oil & Gas Operator | Aug 1996 |
| 12323 | Wilbanks, Bruce A. | Midland, TX 79701 | Oil & Gas Operator | Aug 1996 |
| 12324 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 12325 | Wilbrook Exploration, Inc. | Lingleville, TX 76461 | Oil & Gas Operator | Aug 2003 |
| 12326 | Wilchar, DR. R. B. | Fort Worth, TX 76185 | Oil & Gas Operator | Jan 2007 |
| 12327 | Wilco Operating | Monahans, TX 79756 | Oil & Gas Operator | Dec 2025 |
| 12328 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 12329 | Wilcox Energy Company LLC | Rule, TX 79547 | Oil & Gas Operator | Dec 2025 |
| 12330 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 12331 | Wilcox Operating Corporation | Shreveport, LA 71115 | Oil & Gas Operator | Dec 2025 |
| 12332 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Dec 2025 |
| 12333 | Wild Cat Operating Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 12334 | Wild Horse Energy | Paducah, TX 79248 | Oil & Gas Operator | Dec 2025 |
| 12335 | Wildcat Cement Co. | Shamrock, TX 79079 | Oil & Gas Operator | May 2015 |
| 12336 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 12337 | Wildco Resources, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Dec 2025 |
| 12338 | Wildfire Energy Operating LLC | Houston, TX 77224 | Oil & Gas Operator | Dec 2025 |
| 12339 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 12340 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Dec 2025 |
| 12341 | Wildhorse Resources MNGT Co, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2019 |
| 12342 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 12343 | Wiley Lease Co., LTD. | Jourdanton, TX 78026 | Oil Operator | Dec 2025 |
| 12344 | Wilham Investments, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2020 |
| 12345 | Wilhite Productions | MC Dade, TX 78650 | Oil & Gas Operator | Oct 2012 |
| 12346 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 12347 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Dec 2025 |
| 12348 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Dec 2025 |
| 12349 | William Fleming Productions, LLC | Wichita Falls, TX 76305 | Oil Operator | Feb 2025 |
| 12350 | Williams Deville Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2025 |
| 12351 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 12352 | Williams Petroleum Company, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2025 |
| 12353 | Williams Prod. Gulf Coast, L.P. | Benbrook, TX 76126 | Oil & Gas Operator | Jan 2012 |
| 12354 | Williams Production RMT Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2010 |
| 12355 | Williams, A. Oil | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 12356 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Dec 2025 |
| 12357 | Williams, Clayton Energy, L.L.C | Midland, TX 79705 | Oil & Gas Operator | May 1993 |
| 12358 | Williams, Clayton W., Jr., Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 12359 | Williams, H. E. | Houston, TX 77002 | Oil & Gas Operator | Dec 1994 |
| 12360 | Williams, W. R. | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2013 |
| 12361 | Williams, W. R., Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Feb 2024 |
| 12362 | Williams-Cody, Inc. | Houston, TX 77060 | Oil & Gas Operator | May 1994 |
| 12363 | Williamson Oil & Gas, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Dec 2024 |
| 12364 | Williamson Operating Co. | Uvalde, TX 78801 | Oil & Gas Operator | Dec 2025 |
| 12365 | Williamson Operating Co., LLC | Stamps, AR 71860 | Oil & Gas Operator | Dec 2025 |
| 12366 | Williamson, Don B. | Athens, TX 75751 | Oil & Gas Operator | Mar 2002 |
| 12367 | Williamson, J. C. | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 12368 | Williamson, Ralph E. | Midland, TX 79702 | Oil & Gas Operator | Jan 2012 |
| 12369 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2025 |
| 12370 | Williford Petroleum, L.L.C. | Green CV SPGS, FL 32043 | Oil & Gas Operator | Dec 2025 |
| 12371 | Willis Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 12372 | Willo Oil & Gas Exploration, LLC | Boerne, TX 78006 | Oil & Gas Operator | Jul 2020 |
| 12373 | Willow Bend Oil LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 12374 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 12375 | Willow Springs Prod. Serv.,LLC | Kilgore, TX 75663 | Oil & Gas Operator | Aug 1997 |
| 12376 | Willow Springs Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1999 |
| 12377 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 12378 | Willowick Production LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 12379 | Wills Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 12380 | Wills Oil Holdings, L.L.C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 12381 | Willstar Energy GP, LLC | Houston, TX 77279 | Oil & Gas Operator | Sep 2013 |
| 12382 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Aug 2025 |
| 12383 | Wilshire Oil Co. Of Texas | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2004 |
| 12384 | Wilson - Owens Production Co. | Longview, TX 75601 | Oil & Gas Operator | Nov 1998 |
| 12385 | Wilson Brothers Leasing Co., Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2015 |
| 12386 | Wilson Energy LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 12387 | Wilson Energy Resources LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 12388 | Wilson Exploration Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1996 |
| 12389 | Wilson Hydrocarbon Inc. | Houston, TX 77066 | Oil & Gas Operator | Dec 2025 |
| 12390 | Wilson Oil Co. | Houston, TX 77263 | Oil & Gas Operator | Dec 2025 |
| 12391 | Wilson Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Dec 2025 |
| 12392 | Wilson Operating Company LLC | Tulsa, OK 74105 | Oil & Gas Operator | Dec 2025 |
| 12393 | Wilson Operating Service Inc | Brownfield, TX 79316 | Oil & Gas Operator | Aug 2003 |
| 12394 | Wilson Petroleum Co. | Springfield, MO 65803 | Oil & Gas Operator | Dec 2025 |
| 12395 | Wilson Resources, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2025 |
| 12396 | Wilson Well Service Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Dec 2025 |
| 12397 | Wilson, Billy R. | New Braunfels, TX 78130 | Oil & Gas Operator | Dec 2025 |
| 12398 | Wilson, Charles B., Jr., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2000 |
| 12399 | Wilson, David A. | Longview, TX 75606 | Oil & Gas Operator | Mar 1997 |
| 12400 | Wilson, Dell | Odessa, TX 79762 | Oil & Gas Operator | Aug 2004 |