| 101 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 102 | Chital Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2000 |
| 103 | Circle "M" Energy Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2003 |
| 104 | Circle M Royalty Co., Inc. | Weatherford, TX 76087 | Oil & Gas Operator | May 2007 |
| 105 | Citori Oil Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2004 |
| 106 | Citori Oil Company, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2014 |
| 107 | Clavo Oil, LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 108 | Clay, Jerry H. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2006 |
| 109 | Clear Fork Gas Company | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 110 | Cleo Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 1997 |
| 111 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2026 |
| 112 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 113 | Cochise Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 114 | Coker, Nel Rey Daws | Throckmorton, TX 76483 | Oil & Gas Operator | Mar 2008 |
| 115 | Coley, Thomas | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 116 | Concho Oilfield Service, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2013 |
| 117 | Concorde Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 118 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 119 | Cooper Oil & Gas, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2010 |
| 120 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 121 | Cooper, Glenn W. Oil & Gas | Seymour, TX 76380 | Oil & Gas Operator | Feb 2000 |
| 122 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 123 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 124 | Cox Operating Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2000 |
| 125 | Crisis Oil Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Jun 1995 |
| 126 | Croker, Danny | Wichita Falls, TX 76302 | Oil & Gas Operator | Feb 2026 |
| 127 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 128 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 129 | Cumberland Petroleum, Inc. II | Weatherford, TX 76086 | Oil & Gas Operator | May 1997 |
| 130 | D L Operating | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 131 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | Feb 2026 |
| 132 | D.K.D. | Merkel, TX 79536 | Oil & Gas Operator | Feb 2026 |
| 133 | Dahab Energy Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 134 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 135 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Feb 2026 |
| 136 | DBC Operating Company LLC | Midlothian, TX 76065 | Oil & Gas Operator | Feb 2026 |
| 137 | DCS Energy | Throckmorton, TX 76483 | Oil Operator | Feb 2026 |
| 138 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 139 | Delta Oil & Gas Company | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2003 |
| 140 | Delta Oil & Gas LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 141 | Denton Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2026 |
| 142 | Dino Operating LLC | Throckmorton, TX 76483 | Oil Operator | Feb 2026 |
| 143 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Feb 2026 |
| 144 | DJM Beasley Well Service | Tuscola, TX 79562 | Oil Operator | Feb 2026 |
| 145 | DKMR Oil Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2017 |
| 146 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | Feb 2026 |
| 147 | Double M Petroproperties, Inc. | Haskell, TX 79521 | Oil & Gas Operator | Feb 2026 |
| 148 | Drake Petroleum, LLC | Cypress, TX 77429 | Oil & Gas Operator | Jun 2023 |
| 149 | Drillogix Exploration LLC | Breckenridge, TX 76424 | Oil Operator | Feb 2026 |
| 150 | Duncan, D. M. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 1998 |
| 151 | Durango Operating Co., Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2002 |
| 152 | Dynamic Production, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 153 | E. & H. Oil Company | Woodson, TX 76491 | Oil & Gas Operator | May 1998 |
| 154 | Eagle Capital Partners, LLC | Eunice, NM 88231 | Oil & Gas Operator | Feb 2026 |
| 155 | Eagle Natural Resources, LLC | Eunice, NM 88231 | Oil Operator | Feb 2026 |
| 156 | Earthbound Resources LLC | Merkel, TX 79536 | Oil & Gas Operator | Feb 2026 |
| 157 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 158 | Edington Oil Company | Albany, TX 76430 | Oil & Gas Operator | Aug 2006 |
| 159 | Efficiency Operating Service | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 160 | Eldorado Oil And Gas, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Nov 1995 |
| 161 | Ellard, Herman | Graham, TX 76450 | Oil & Gas Operator | Feb 2005 |
| 162 | Embassy Oil Company | Highland VLG, TX 75077 | Oil & Gas Operator | Feb 2026 |
| 163 | Emco Oil & Gas | Graham, TX 76450 | Oil & Gas Operator | Dec 1995 |
| 164 | Emco Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2002 |
| 165 | Emerald Petroleum Corporation | Dallas, TX 75244 | Oil & Gas Operator | Apr 2002 |
| 166 | Encon Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 167 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Nov 2025 |
| 168 | Energy Well Service, Inc. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2004 |
| 169 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 170 | Enre Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2005 |
| 171 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 172 | Eratz Investments Inc. | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 173 | Erson Royalty Company, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Feb 2006 |
| 174 | Esna Operating Co., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 1994 |
| 175 | Estacado Energy, LLC | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 2026 |
| 176 | Everett, Joe Mack | Throckmorton, TX 76483 | Oil & Gas Operator | Feb 2026 |
| 177 | Ex-Cel Resources, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 178 | Exlco, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 179 | Exp, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 2003 |
| 180 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 181 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Feb 2026 |
| 182 | Fairfield Energy Corp. | Dallas, TX 75205 | Oil & Gas Operator | Feb 2026 |
| 183 | Fairway Links Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Aug 2016 |
| 184 | Farmer Operating, LLC | Olney, TX 76374 | Oil & Gas Operator | Dec 2019 |
| 185 | Farmer, Lewis & Hayden | Olney, TX 76374 | Oil & Gas Operator | Oct 2008 |
| 186 | Federal Energy Development Co. | Dallas, TX 75205 | Oil & Gas Operator | Mar 2011 |
| 187 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 188 | Fidelity Petroleum Corporation | Plano, TX 75074 | Oil & Gas Operator | Feb 2026 |
| 189 | Field Production Company | Cleburne, TX 76033 | Oil & Gas Operator | Mar 2023 |
| 190 | First American Operating Co. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2006 |
| 191 | Fisher, Jack Inc. | Abilene, TX 79603 | Oil & Gas Operator | Sep 2001 |
| 192 | Fivestones Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 193 | Flournoy, Russell B. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2020 |
| 194 | Foag, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2022 |
| 195 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Feb 2026 |
| 196 | Four H Oil Properties | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 197 | Fourcooks Oil & Gas, LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 198 | Fredonia Resources Inc. | Longview, TX 75606 | Oil & Gas Operator | Aug 2003 |
| 199 | Frontier Operating Corporation | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 200 | Frontier Resources, Inc. | Dallas, TX 75214 | Oil & Gas Operator | Feb 2026 |