| 12101 | Whitemound Oil Company | FT Stockton, TX 79735 | Oil & Gas Operator | Jan 2017 |
| 12102 | Whitesands Operating, L.L.C. | Corpus Chrsti, TX 78466 | Oil & Gas Operator | Mar 2025 |
| 12103 | Whitesands Resources, L.L.C. | Corpus Chrsti, TX 78466 | Oil Operator | Jun 2019 |
| 12104 | Whiteside, H. W. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 12105 | Whiteside, Robert | Comanche, TX 76442 | Oil & Gas Operator | May 1998 |
| 12106 | Whitfield Energy | Midland, TX 79702 | Oil & Gas Operator | Jan 1999 |
| 12107 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 12108 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 12109 | Whitlock, J.R. Operator | Amarillo, TX 79105 | Gas Operator | Jul 1997 |
| 12110 | Whitman-Dome Energy Corporation | San Diego, CA 92101 | Oil & Gas Operator | Nov 1996 |
| 12111 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 12112 | Whitson, James A., Jr. | Houston, TX 77063 | Oil & Gas Operator | Nov 2011 |
| 12113 | Whitt Investments, Inc. | Graham, TX 76450 | Oil Operator | Dec 2019 |
| 12114 | Whitt Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Jul 2025 |
| 12115 | Whitt, W. J. | Albany, TX 76430 | Oil & Gas Operator | Nov 1996 |
| 12116 | Whitten Energy Corp. | Houston, TX 77090 | Oil & Gas Operator | Jul 2025 |
| 12117 | Whittier Operating Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2007 |
| 12118 | Whittington Energy Co. | Melbourne, FL 32901 | Oil & Gas Operator | Jul 2025 |
| 12119 | Whittington Operating Company | Houston, TX 77069 | Oil & Gas Operator | Jul 2025 |
| 12120 | Whittington, G. R. | Amarillo, TX 79109 | Oil & Gas Operator | Jan 1994 |
| 12121 | Whittington, G. R. Estate | Amarillo, TX 79109 | Oil & Gas Operator | Mar 2008 |
| 12122 | Whittington, James C., Inc. | Dallas, TX 75214 | Oil & Gas Operator | Jan 2017 |
| 12123 | WHL Oil Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1998 |
| 12124 | Wichita Falls Oil Expl. Co. | Holliday, TX 76366 | Oil & Gas Operator | Jul 2025 |
| 12125 | Wichita Operating Company, Inc. | Spring, TX 77393 | Oil & Gas Operator | May 2009 |
| 12126 | Wigington, James Robert | Ackerly, TX 79713 | Oil & Gas Operator | Aug 2003 |
| 12127 | Wilbanks Energy Corporation | Houston, TX 77036 | Oil & Gas Operator | Dec 2001 |
| 12128 | Wilbanks Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 12129 | Wilbanks Reserve Corporation | Denver, CO 80203 | Oil & Gas Operator | Jul 2025 |
| 12130 | Wilbanks, Bruce & G.L. | Midland, TX 79702 | Oil & Gas Operator | Aug 1996 |
| 12131 | Wilbanks, Bruce A. | Midland, TX 79701 | Oil & Gas Operator | Aug 1996 |
| 12132 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 12133 | Wilbrook Exploration, Inc. | Lingleville, TX 76461 | Oil & Gas Operator | Aug 2003 |
| 12134 | Wilchar, DR. R. B. | Fort Worth, TX 76185 | Oil & Gas Operator | Jan 2007 |
| 12135 | Wilco Operating | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 12136 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 12137 | Wilcox Energy Company LLC | Rule, TX 79547 | Oil & Gas Operator | Jul 2025 |
| 12138 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 12139 | Wilcox Operating Corporation | Shreveport, LA 71115 | Oil & Gas Operator | Jul 2025 |
| 12140 | Wilcox Petroleum Operating LLC. | Rule, TX 79547 | Oil & Gas Operator | Jul 2025 |
| 12141 | Wild Cat Operating Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 12142 | Wild Horse Energy | Paducah, TX 79248 | Oil & Gas Operator | Jul 2025 |
| 12143 | Wildcat Cement Co. | Shamrock, TX 79079 | Oil & Gas Operator | May 2015 |
| 12144 | Wildcat Energy, LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2021 |
| 12145 | Wildco Resources, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Jul 2025 |
| 12146 | Wildfire Energy Operating LLC | Houston, TX 77224 | Oil & Gas Operator | Jul 2025 |
| 12147 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 12148 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Jul 2025 |
| 12149 | Wildhorse Resources MNGT Co, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2019 |
| 12150 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 12151 | Wiley Lease Co., LTD. | Jourdanton, TX 78026 | Oil Operator | Jul 2025 |
| 12152 | Wilham Investments, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2020 |
| 12153 | Wilhite Productions | MC Dade, TX 78650 | Oil & Gas Operator | Oct 2012 |
| 12154 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 12155 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Jul 2025 |
| 12156 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jul 2025 |
| 12157 | William Fleming Productions, LLC | Wichita Falls, TX 76305 | Oil Operator | Feb 2025 |
| 12158 | Williams Deville Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Jul 2025 |
| 12159 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 12160 | Williams Petroleum Company, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Jul 2025 |
| 12161 | Williams Prod. Gulf Coast, L.P. | Benbrook, TX 76126 | Oil & Gas Operator | Jan 2012 |
| 12162 | Williams Production RMT Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2010 |
| 12163 | Williams, A. Oil | Wichita Falls, TX 76308 | Oil Operator | Jul 2025 |
| 12164 | Williams, Clayton Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Jul 2025 |
| 12165 | Williams, Clayton Energy, L.L.C | Midland, TX 79705 | Oil & Gas Operator | May 1993 |
| 12166 | Williams, Clayton W., Jr., Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 12167 | Williams, H. E. | Houston, TX 77002 | Oil & Gas Operator | Dec 1994 |
| 12168 | Williams, W. R. | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2013 |
| 12169 | Williams, W. R., Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Feb 2024 |
| 12170 | Williams-Cody, Inc. | Houston, TX 77060 | Oil & Gas Operator | May 1994 |
| 12171 | Williamson Oil & Gas, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Dec 2024 |
| 12172 | Williamson Operating Co. | Uvalde, TX 78801 | Oil & Gas Operator | Jul 2025 |
| 12173 | Williamson Operating Co., LLC | Stamps, AR 71860 | Oil & Gas Operator | Jul 2025 |
| 12174 | Williamson, J. C. | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 12175 | Williamson, Ralph E. | Midland, TX 79702 | Oil & Gas Operator | Jan 2012 |
| 12176 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2025 |
| 12177 | Williford Petroleum, L.L.C. | Green CV SPGS, FL 32043 | Oil & Gas Operator | Jul 2025 |
| 12178 | Willis Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 12179 | Willo Oil & Gas Exploration, LLC | Boerne, TX 78006 | Oil & Gas Operator | Jul 2020 |
| 12180 | Willow Bend Oil LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 12181 | Willow Creek Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2009 |
| 12182 | Willow Springs Prod. Serv.,LLC | Kilgore, TX 75663 | Oil & Gas Operator | Aug 1997 |
| 12183 | Willow Springs Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1999 |
| 12184 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 12185 | Wills Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 12186 | Wills Oil Holdings, L.L.C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 12187 | Willstar Energy GP, LLC | Houston, TX 77279 | Oil & Gas Operator | Sep 2013 |
| 12188 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Mar 2025 |
| 12189 | Wilshire Oil Co. Of Texas | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2004 |
| 12190 | Wilson - Owens Production Co. | Longview, TX 75601 | Oil & Gas Operator | Nov 1998 |
| 12191 | Wilson Brothers Leasing Co., Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2015 |
| 12192 | Wilson Energy LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 12193 | Wilson Energy Resources LLC | Graham, TX 76450 | Oil Operator | Jul 2025 |
| 12194 | Wilson Exploration Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1996 |
| 12195 | Wilson Hydrocarbon Inc. | Houston, TX 77066 | Oil & Gas Operator | Jul 2025 |
| 12196 | Wilson Oil Co. | Houston, TX 77263 | Oil & Gas Operator | Jul 2025 |
| 12197 | Wilson Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Jul 2025 |
| 12198 | Wilson Operating Company LLC | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2025 |
| 12199 | Wilson Operating Service Inc | Brownfield, TX 79316 | Oil & Gas Operator | Aug 2003 |
| 12200 | Wilson Petroleum Co. | Springfield, MO 65803 | Oil & Gas Operator | Jul 2025 |