| 101 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 102 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 103 | Brown, H.L. Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 104 | Browning Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 1994 |
| 105 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 106 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 107 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 108 | Burleson Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 109 | Burleson, Lewis B. Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2010 |
| 110 | Burlington Res O&G Co-Permian | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 111 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 112 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 113 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 114 | Butler, Kevin O. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 115 | Butler, Kevin O. & Assoc., Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 116 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 117 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 118 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 119 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | May 2025 |
| 120 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 121 | Caprock Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2007 |
| 122 | Capstone Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2015 |
| 123 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | May 2025 |
| 124 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 125 | Cathey Petroleum Company, Inc. | Big Spring, TX 79720 | Oil & Gas Operator | Apr 2008 |
| 126 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 127 | Central Texas Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 128 | Cet Energy Corporation | Spring, TX 77391 | Oil & Gas Operator | Nov 2003 |
| 129 | CGS Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2023 |
| 130 | CH4 Energy II LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2018 |
| 131 | CH4 Energy Six, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 132 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Mar 2025 |
| 133 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 134 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2025 |
| 135 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2025 |
| 136 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 137 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 138 | Chisos Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 139 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 140 | Christico Petroleum Company | San Antonio, TX 78216 | Oil & Gas Operator | May 2025 |
| 141 | Ciervo Resources Asset Holding, LLC | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 142 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 143 | Circle H Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2020 |
| 144 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | May 2025 |
| 145 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2025 |
| 146 | Clark, John M., Inc. | Midland, TX 79704 | Oil & Gas Operator | May 2025 |
| 147 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 148 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 149 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2025 |
| 150 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 151 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2025 |
| 152 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 153 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 154 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 155 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 156 | Comanche Operating Co. | Oklahoma City, OK 73120 | Oil & Gas Operator | Aug 2002 |
| 157 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 158 | Concho Oilfield Serv & Oper Co. | Eden, TX 76837 | Oil & Gas Operator | May 2025 |
| 159 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 160 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 161 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 162 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | May 2025 |
| 163 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 164 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Feb 2025 |
| 165 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 166 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 167 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | May 2025 |
| 168 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 169 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 170 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 171 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 172 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | May 2025 |
| 173 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 174 | CTL Oil & Gas Corporation | Buchanan Dam, TX 78609 | Oil & Gas Operator | Nov 2020 |
| 175 | Cuervo, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | May 2025 |
| 176 | Custer & Wright Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 177 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | Jan 2025 |
| 178 | Dakota Resources, Inc. (I) | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 179 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 180 | Dantex Oil & Gas, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 181 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Feb 2025 |
| 182 | Delek Energy Systems Us Inc | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 183 | Delta C02, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2021 |
| 184 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 185 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 186 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 187 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 188 | DHC, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 1997 |
| 189 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 190 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 191 | Dominion Operating, LLC | Midland, TX 79708 | Oil Operator | Mar 2018 |
| 192 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 193 | Duncan Drilling Co. | Big Spring, TX 79721 | Oil & Gas Operator | May 2025 |
| 194 | Dundee Oil & Supply Inc | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2001 |
| 195 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 196 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 197 | E R Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 198 | E.G. Operating | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 199 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 200 | Eagle Capital Partners, LLC | Eunice, NM 88231 | Oil & Gas Operator | May 2025 |