| 12101 | Wilbrook Exploration, Inc. | Lingleville, TX 76461 | Oil & Gas Operator | Aug 2003 |
| 12102 | Wilchar, DR. R. B. | Fort Worth, TX 76185 | Oil & Gas Operator | Jan 2007 |
| 12103 | Wilco Operating | Monahans, TX 79756 | Oil & Gas Operator | Apr 2026 |
| 12104 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 12105 | Wilcox Energy Company LLC | Rule, TX 79547 | Oil & Gas Operator | Apr 2026 |
| 12106 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 12107 | Wilcox Operating Corporation | Shreveport, LA 71115 | Oil & Gas Operator | Apr 2026 |
| 12108 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Apr 2026 |
| 12109 | Wild Cat Operating Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 12110 | Wild Horse Energy | Paducah, TX 79248 | Oil & Gas Operator | Apr 2026 |
| 12111 | Wildcat Cement Co. | Shamrock, TX 79079 | Oil & Gas Operator | May 2015 |
| 12112 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 12113 | Wildco Resources, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Apr 2026 |
| 12114 | Wildfire Energy Operating LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2026 |
| 12115 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 12116 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2026 |
| 12117 | Wildhorse Resources MNGT Co, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2019 |
| 12118 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 12119 | Wiley Lease Co., LTD. | Jourdanton, TX 78026 | Oil Operator | Apr 2026 |
| 12120 | Wilham Investments, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2020 |
| 12121 | Wilhite Productions | MC Dade, TX 78650 | Oil & Gas Operator | Oct 2012 |
| 12122 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jan 2026 |
| 12123 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Apr 2026 |
| 12124 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Apr 2026 |
| 12125 | William Fleming Productions, LLC | Wichita Falls, TX 76305 | Oil Operator | Feb 2025 |
| 12126 | Williams Deville Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2026 |
| 12127 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 12128 | Williams Petroleum Company, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Apr 2026 |
| 12129 | Williams Prod. Gulf Coast, L.P. | Benbrook, TX 76126 | Oil & Gas Operator | Jan 2012 |
| 12130 | Williams Production RMT Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2010 |
| 12131 | Williams, A. Oil | Wichita Falls, TX 76308 | Oil Operator | Apr 2026 |
| 12132 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2026 |
| 12133 | Williams, Clayton Energy, L.L.C | Midland, TX 79705 | Oil & Gas Operator | May 1993 |
| 12134 | Williams, Clayton W., Jr., Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 12135 | Williams, H. E. | Houston, TX 77002 | Oil & Gas Operator | Dec 1994 |
| 12136 | Williams, W. R. | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2013 |
| 12137 | Williams, W. R., Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Feb 2024 |
| 12138 | Williams-Cody, Inc. | Houston, TX 77060 | Oil & Gas Operator | May 1994 |
| 12139 | Williamson Oil & Gas, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Dec 2024 |
| 12140 | Williamson Operating Co. | Uvalde, TX 78801 | Oil & Gas Operator | Apr 2026 |
| 12141 | Williamson Operating Co., LLC | Stamps, AR 71860 | Oil & Gas Operator | Apr 2026 |
| 12142 | Williamson, J. C. | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 12143 | Williamson, Ralph E. | Midland, TX 79702 | Oil & Gas Operator | Jan 2012 |
| 12144 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2026 |
| 12145 | Williford Petroleum, L.L.C. | Green CV SPGS, FL 32043 | Oil & Gas Operator | Apr 2026 |
| 12146 | Willis Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 12147 | Willo Oil & Gas Exploration, LLC | Boerne, TX 78006 | Oil & Gas Operator | Jul 2020 |
| 12148 | Willow Bend Oil LLC | Dallas, TX 75206 | Oil & Gas Operator | Apr 2026 |
| 12149 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 12150 | Willow Springs Prod. Serv.,LLC | Kilgore, TX 75663 | Oil & Gas Operator | Aug 1997 |
| 12151 | Willow Springs Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1999 |
| 12152 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 12153 | Willowick Production LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 12154 | Wills Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 12155 | Wills Oil Holdings, L.L.C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2026 |
| 12156 | Willstar Energy GP, LLC | Houston, TX 77279 | Oil & Gas Operator | Sep 2013 |
| 12157 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Dec 2025 |
| 12158 | Wilshire Oil Co. Of Texas | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2004 |
| 12159 | Wilson - Owens Production Co. | Longview, TX 75601 | Oil & Gas Operator | Nov 1998 |
| 12160 | Wilson Brothers Leasing Co., Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2015 |
| 12161 | Wilson Energy LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 12162 | Wilson Energy Resources LLC | Graham, TX 76450 | Oil Operator | Apr 2026 |
| 12163 | Wilson Exploration Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1996 |
| 12164 | Wilson Hydrocarbon Inc. | Houston, TX 77066 | Oil & Gas Operator | Apr 2026 |
| 12165 | Wilson Oil Co. | Houston, TX 77263 | Oil & Gas Operator | Apr 2026 |
| 12166 | Wilson Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Apr 2026 |
| 12167 | Wilson Operating Company LLC | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2026 |
| 12168 | Wilson Operating Service Inc | Brownfield, TX 79316 | Oil & Gas Operator | Aug 2003 |
| 12169 | Wilson Petroleum Co. | Springfield, MO 65803 | Oil & Gas Operator | Apr 2026 |
| 12170 | Wilson Resources, Inc. | Longview, TX 75601 | Oil & Gas Operator | Apr 2026 |
| 12171 | Wilson Well Service Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2026 |
| 12172 | Wilson, Billy R. | New Braunfels, TX 78130 | Oil & Gas Operator | Apr 2026 |
| 12173 | Wilson, Charles B., Jr., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2000 |
| 12174 | Wilson, David A. | Longview, TX 75606 | Oil & Gas Operator | Mar 1997 |
| 12175 | Wilson, Don H., Inc. | Elkhart, TX 75839 | Oil & Gas Operator | May 2019 |
| 12176 | Wilson, Jerry L. | Ranger, TX 76470 | Oil & Gas Operator | Apr 2026 |
| 12177 | Wilson, Olan Max | Cisco, TX 76437 | Oil & Gas Operator | Apr 2026 |
| 12178 | Wilson, W. Corp. | Midland, TX 79705 | Oil & Gas Operator | Mar 1999 |
| 12179 | Wilson, W.W. Jr. Properties | Abilene, TX 79605 | Oil & Gas Operator | Jul 1995 |
| 12180 | Wilson, WM. B. Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 12181 | Wilson-Shab Corp. | Electra, TX 76360 | Oil & Gas Operator | Apr 2026 |
| 12182 | Wilton Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Apr 1999 |
| 12183 | Wilton, Frank | Graham, TX 76450 | Oil & Gas Operator | Oct 2016 |
| 12184 | Wimberley Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2013 |
| 12185 | Wimco | Dallas, TX 75229 | Oil & Gas Operator | Jul 2008 |
| 12186 | Wimsco, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 1994 |
| 12187 | Winchester Energy Operating Co. | Austin, TX 78746 | Oil & Gas Operator | Apr 2026 |
| 12188 | Winchester Energy, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 12189 | Winchester Exploration, Inc. | Arlington, TX 76013 | Oil & Gas Operator | Aug 2003 |
| 12190 | Winchester Oil & Gas LLC | Rockdale, TX 76567 | Oil Operator | Apr 2026 |
| 12191 | Winchester Operating, Inc. | Bryan, TX 77808 | Oil & Gas Operator | Aug 2001 |
| 12192 | Winchester Production Co., LTD. | Shreveport, LA 71129 | Oil & Gas Operator | Sep 2008 |
| 12193 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 12194 | Winco Oil Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 12195 | Winco Petroleum Company | Richardson, TX 75080 | Oil & Gas Operator | Jan 2003 |
| 12196 | Wind River Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 12197 | Wind River Resources Inc | Tulsa, OK 74136-6381 | Oil & Gas Operator | Jun 2010 |
| 12198 | Windham Resources | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 12199 | Windham Resources, Inc. | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2004 |
| 12200 | Windham, L. E. | Rankin, TX 79778 | Oil & Gas Operator | Dec 1996 |