| 101 | Warner, Mark T. Oil Co | Pampa, TX 79065 | Oil & Gas Operator | Jul 2021 |
| 102 | Warner-Pawel | Alice, TX 78333 | Oil & Gas Operator | Mar 2025 |
| 103 | Warnock Operating Company, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2013 |
| 104 | Warren American Oil Co | Tulsa, OK 74147 | Oil & Gas Operator | Jan 2025 |
| 105 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Mar 2025 |
| 106 | Warren Producers, Inc. | Bowling Green, KY 42102 | Oil & Gas Operator | Dec 2017 |
| 107 | Warren Production Services | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2025 |
| 108 | Warren, Earl T. | San Angelo, TX 76906 | Oil & Gas Operator | Mar 2025 |
| 109 | Warren, Joe H. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2001 |
| 110 | Warrior Exploration LLC | Sapulpa, OK 74067-1912 | Oil & Gas Operator | Dec 2024 |
| 111 | Warrior Petroleum Corporation | Henderson, TX 75652 | Oil & Gas Operator | Apr 2024 |
| 112 | Warrior Resources Inc. | Mexia, TX 76667 | Oil & Gas Operator | Mar 2025 |
| 113 | Warwick Associates LC | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 2025 |
| 114 | Warwick Oil & Gas, Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 1993 |
| 115 | Warwick-Artemis, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 116 | Wash, Robert C. | Forsan, TX 79733 | Oil & Gas Operator | Nov 2000 |
| 117 | Wash, Robert C. Inc. | Forsan, TX 79733 | Oil & Gas Operator | Mar 2025 |
| 118 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 119 | Washita Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2006 |
| 120 | Watco Energy | Jacksboro, TX 76458 | Oil & Gas Operator | Mar 2025 |
| 121 | Watco Energy, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Apr 1996 |
| 122 | Water Works Engineering, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Jan 1998 |
| 123 | Waterbridge Texas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 124 | Waters Eng. & Operating, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Sep 2013 |
| 125 | Waters Petroleum | Albany, TX 76430 | Oil & Gas Operator | Aug 2016 |
| 126 | Watkins Production Company | Dallas, TX 75229 | Oil & Gas Operator | Feb 2008 |
| 127 | Watkins, J. B. | Borger, TX 79007 | Oil & Gas Operator | May 2009 |
| 128 | Watson Energy Investments, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 129 | Watson Oil & Gas Co. | Gorman, TX 76454 | Oil & Gas Operator | Jan 2002 |
| 130 | Watson Oil & Gas, Inc. | Spicewood, TX 78669 | Oil & Gas Operator | Mar 2025 |
| 131 | Watson Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2003 |
| 132 | Watson Packer Employee Fund | Monahans, TX 79756 | Oil & Gas Operator | Mar 2025 |
| 133 | Watson, B. G. Oil Field Salv Inc | Coleman, TX 76834 | Oil & Gas Operator | Mar 2000 |
| 134 | Watt Energy, LLC | Port Barre, LA 70577 | Oil & Gas Operator | Mar 2025 |
| 135 | Watusi Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 136 | Way, Ralph L., Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 137 | Wayhan Oil Company | Houston, TX 77070 | Oil & Gas Operator | Mar 2025 |
| 138 | Wayland Drilling & Explr., Inc. | Grapevine, TX 76099 | Oil & Gas Operator | Apr 2006 |
| 139 | Waymar Oil & Gas Company | Texarkana, TX 75503 | Oil & Gas Operator | Jan 2007 |
| 140 | Wayne E. Glenn Associates, Inc. | Dickinson, TX 77539 | Oil & Gas Operator | Jan 2016 |
| 141 | WB Mullin Operating LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 142 | WBH Energy Partners LLC | Austin, TX 78703 | Oil & Gas Operator | Mar 2025 |
| 143 | WBR, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 1995 |
| 144 | WCS Oil & Gas Corporation | Dallas, TX 75209 | Oil & Gas Operator | Aug 2021 |
| 145 | WCT Leasing Co. | Austin, TX 78734 | Oil & Gas Operator | Apr 2019 |
| 146 | WCWB Energy, LLC | Midland, TX 79701 | Oil Operator | Sep 2015 |
| 147 | Weakland Investments, Inc. | Denver, CO 80215 | Oil & Gas Operator | Mar 2025 |
| 148 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Mar 2025 |
| 149 | Weathers Exploration, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2025 |
| 150 | Weatherston, George D. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2001 |
| 151 | Weaver & Sharp | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Mar 1997 |
| 152 | Weaver Global Operating, LLC | Colleyville, TX 76034 | Oil Operator | Mar 2025 |
| 153 | Web Well Tending Service, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Nov 2011 |
| 154 | Weber Energy Corporation | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 155 | Weeks Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 156 | Wefco, Inc. | Pampa, TX 79065 | Oil & Gas Operator | May 1993 |
| 157 | Wehunt Oil Company, Inc. | Dallas, TX 75376 | Oil & Gas Operator | Nov 2002 |
| 158 | Weibye, Carolyn S. | Houston, TX 77098 | Oil & Gas Operator | Mar 2025 |
| 159 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 160 | Weinstrom Petroleum | Devine, TX 78016 | Oil Operator | Mar 2025 |
| 161 | Weiser-Brown Oil Co | Magnolia, AR 71754 | Oil Operator | Jul 2024 |
| 162 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Mar 2025 |
| 163 | Weiss Oil Co. | Streator, IL 61364 | Oil & Gas Operator | Dec 1997 |
| 164 | Wejco, Inc. | Rising Star, TX 76471 | Oil & Gas Operator | Mar 2025 |
| 165 | Welcome Well Serv. & Boykin Bros | Abilene, TX 79604 | Oil & Gas Operator | Apr 1995 |
| 166 | Welder Exploration & Prod., Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Dec 2022 |
| 167 | Welder Operating, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2001 |
| 168 | Welder-Heyer Energy, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 2001 |
| 169 | Welderxp LTD. | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2025 |
| 170 | Weldon Corporation | Houston, TX 77056 | Oil Operator | Feb 2020 |
| 171 | Welhausen Operating Co., Inc. | Beeville, TX 78104 | Oil & Gas Operator | Aug 2003 |
| 172 | Welhausen Operating Company, LP | Beeville, TX 78104 | Oil & Gas Operator | Nov 2016 |
| 173 | Well Recycling Company | Olney, TX 76374 | Oil Operator | Aug 2005 |
| 174 | Well-Co Solutions, LLC | Batson, TX 77519 | Oil Operator | Mar 2025 |
| 175 | Wellington Securities, Inc. | Plano, TX 75093 | Gas Operator | Jul 2014 |
| 176 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 177 | Wellstar Corporation | Northglenn, CO 80233 | Oil & Gas Operator | Jan 2025 |
| 178 | Wen-Be | Jourdanton, TX 78026 | Oil & Gas Operator | Mar 2025 |
| 179 | Wendy Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 180 | Wenexco, Inc. | Streetman, TX 75859 | Oil & Gas Operator | Mar 2025 |
| 181 | Wentworth Energy, Inc. | Palestine, TX 75801 | Oil & Gas Operator | Jun 2009 |
| 182 | Werner Oil, Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 1996 |
| 183 | Wernette, Louis J. | Hondo, TX 78861 | Oil & Gas Operator | Sep 2023 |
| 184 | Wes Pro, Inc. | Jacksboro, TX 76458 | Oil Operator | Jan 2013 |
| 185 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 186 | Wes-Mor Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 1994 |
| 187 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 188 | Wes-Tex Oil Co. (I) | Bangs, TX 76823 | Oil & Gas Operator | Mar 2025 |
| 189 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Dec 2024 |
| 190 | West Co., The | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2016 |
| 191 | West Inland Energy, Inc. | N Richlnd HLS, TX 76182 | Oil & Gas Operator | Mar 2025 |
| 192 | West Mountain Operating Co, Inc. | Longview, TX 75604 | Oil & Gas Operator | Feb 2019 |
| 193 | West Oil Resources, LLC | Liberty Hill, TX 78642 | Oil & Gas Operator | Mar 2025 |
| 194 | West Petroleum Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Oct 2009 |
| 195 | West Texas Assets, LLC | Fort Worth, TX 76108 | Gas Operator | May 2018 |
| 196 | West Texas Diversified Interests | Eastland, TX 76448 | Oil & Gas Operator | Jun 2006 |
| 197 | West Texas Exploration Co. | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 198 | West Texas Oil And Gas Corp. | Houston, TX 77056 | Oil & Gas Operator | Feb 2014 |
| 199 | West Texas Oil And Gas Oper.,Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2024 |
| 200 | West Texas Royalties, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |