| 101 | Century Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 102 | Chan West Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Dec 2025 |
| 103 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Aug 2025 |
| 104 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 105 | Chital Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2000 |
| 106 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 107 | Christie, C. B., Jr. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 108 | Circle "M" Energy Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2003 |
| 109 | Clark Operating Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 110 | Cleo Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 1997 |
| 111 | Cleveland Oil & Gas | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 112 | Clide Oil Corp. | Iraan, TX 79744 | Oil & Gas Operator | Nov 2015 |
| 113 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 114 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 115 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 116 | Collier Oil Field Services Inc | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2025 |
| 117 | Collier, Scott Inc. | Holliday, TX 76366 | Oil Operator | May 2003 |
| 118 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Dec 2025 |
| 119 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 120 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 121 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 122 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 123 | Cox Operating Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2000 |
| 124 | Cox, H. L. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jan 2011 |
| 125 | Coyote Operating, LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 126 | Craighead, Ray | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 127 | Craighead, Ray Well Service Inc | Wichita Falls, TX 76308 | Oil Operator | Apr 2019 |
| 128 | Craighead, Robert A. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 129 | Crampton, Freddie | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 130 | Cranford, Wayne | Electra, TX 76360 | Oil & Gas Operator | Dec 2019 |
| 131 | Crawford Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Jul 2001 |
| 132 | Crenshaw Oil | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2025 |
| 133 | Crenshaw, Joe R. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 134 | Crenshaw, K. M. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2018 |
| 135 | Crocker Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Aug 1999 |
| 136 | Croker, Danny | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2025 |
| 137 | Crutcher Oil Properties | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 138 | Cruthird, Mark Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 139 | CVS Operating, LLC. | Plano, TX 75074 | Oil & Gas Operator | Dec 2025 |
| 140 | Cycle Oil & Gas Inc. | Katy, TX 77449 | Oil Operator | Dec 2025 |
| 141 | Dara Operating Company, LLC | Electra, TX 76360 | Oil & Gas Operator | Dec 2025 |
| 142 | Dark Horse Operating Co., L.L.C. | Denton, TX 76202 | Oil & Gas Operator | Oct 2022 |
| 143 | Darr-Hey Oil, LLC | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2025 |
| 144 | Davis, Gowin | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2001 |
| 145 | De Larios, R. V., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 146 | Dearing, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2021 |
| 147 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 148 | Deen Drilling Company | Archer City, TX 76351 | Oil & Gas Operator | Dec 2025 |
| 149 | Defranco Oil Account | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2004 |
| 150 | Del Mar | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 151 | Delta Oil | Holliday, TX 76366 | Oil & Gas Operator | Sep 2005 |
| 152 | Den-Kay Corp. | Plano, TX 75074 | Oil Operator | Aug 2009 |
| 153 | Denali Petroleum, LLC | Arlington, TX 76006 | Oil Operator | Mar 2021 |
| 154 | Dennis, Don | Grady, OK 73545 | Oil & Gas Operator | Mar 1998 |
| 155 | Diamond Energy, Inc. | Sherman, TX 75091 | Oil & Gas Operator | Dec 2025 |
| 156 | Diamond Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2010 |
| 157 | Dillard & Dillard Inc. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 158 | Dimock Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Dec 2025 |
| 159 | DM Backhoe Service | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 160 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Oct 2025 |
| 161 | Double E Oil & Gas, L. P. | Electra, TX 76360 | Oil & Gas Operator | Dec 2025 |
| 162 | DP2, LLC | Southlake, TX 76092 | Oil & Gas Operator | Dec 2025 |
| 163 | Drake Oil & Gas, LLC | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 164 | Dry Fork Production Co., LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 165 | Duncan Oil Company | Holliday, TX 76366 | Oil Operator | Mar 2008 |
| 166 | Dym Energy, Inc. | Celina, TX 75009 | Oil & Gas Operator | Apr 2018 |
| 167 | E & E Construction Company | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 168 | E & E Drilling Co., Inc. | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 169 | Eagle Natural Resources, LLC | Eunice, NM 88231 | Oil Operator | Dec 2025 |
| 170 | Efficiency Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2008 |
| 171 | Efficiency Operating Service | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 172 | Elendil Resources LLC | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 173 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Aug 2025 |
| 174 | Eratz Investments Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 175 | Estacado Energy, LLC | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2025 |
| 176 | Exmoor Oil & Minerals Corp. | Dallas, TX 75225 | Oil & Gas Operator | May 1994 |
| 177 | Explo Oil, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 178 | Extech Operating, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Dec 2025 |
| 179 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 180 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 181 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 182 | F&H Operating Company LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 183 | Fagadau Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2006 |
| 184 | Falls Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 185 | Falls Production Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 186 | Farrell Oil Company | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2025 |
| 187 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 188 | Felty Drilling Co. Inc | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2025 |
| 189 | Felty Production, Inc. | Burkburnett, TX 76354 | Oil Operator | Dec 2025 |
| 190 | Felty, F. T. Operating Company | Burkburnett, TX 76354 | Oil & Gas Operator | Jul 2018 |
| 191 | Ferguson, S. M. Jr., Inc. | Dallas, TX 75218 | Oil & Gas Operator | Dec 2025 |
| 192 | Field Production Company | Cleburne, TX 76033 | Oil & Gas Operator | Mar 2023 |
| 193 | Fin Energy, LLC | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 194 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 195 | Finnell Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2009 |
| 196 | Finnell Oil Services, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 197 | Flusche Properties, L.L.C. | Electra, TX 76360 | Oil & Gas Operator | Jan 2017 |
| 198 | Flusche Supply, Inc. | Electra, TX 76360 | Oil & Gas Operator | Aug 1994 |
| 199 | Flusche, Herb | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2005 |
| 200 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Dec 2025 |