| 101 | Centurion Operating Corporation | Rockwall, TX 75087 | Oil & Gas Operator | Dec 2025 |
| 102 | Cfo Resources, Inc. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Dec 2025 |
| 103 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Oct 2025 |
| 104 | Chan West Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Dec 2025 |
| 105 | Chancellor, Earl Sales Co., Inc. | Sweetwater, TX 79556 | Oil & Gas Operator | Dec 2025 |
| 106 | Channa Operating, LLC | Houston, TX 77063 | Oil & Gas Operator | Jul 2021 |
| 107 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2025 |
| 108 | Charter Petroleum Company | Abilene, TX 79605 | Oil & Gas Operator | Dec 2025 |
| 109 | Cherokee Production Corp. | Greenville, TX 75401 | Oil & Gas Operator | Dec 2025 |
| 110 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 111 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 112 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 113 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Dec 2025 |
| 114 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Dec 2025 |
| 115 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 116 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 117 | Cinnabar Energy, LTD. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2018 |
| 118 | Cinnabar Operating, LLC | Fort Worth, TX 76121 | Oil & Gas Operator | Dec 2025 |
| 119 | Circle W Operating, Inc. | Mertzon, TX 76941 | Oil & Gas Operator | Dec 2025 |
| 120 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Dec 2025 |
| 121 | Clavo Oil, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 122 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 123 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 124 | Cleveland Production Company | Summit, MS 39666 | Oil & Gas Operator | Jul 1999 |
| 125 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Dec 2025 |
| 126 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 127 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 128 | Colemanite, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Dec 2025 |
| 129 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 130 | Continental Exploration LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2025 |
| 131 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 132 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 133 | Cotton Valley Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2000 |
| 134 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 135 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Dec 2025 |
| 136 | Craruth Energy Corporation | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 137 | Creed Operating Co., LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 138 | CRM Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Dec 2025 |
| 139 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 140 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Dec 2025 |
| 141 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Dec 2025 |
| 142 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | Dec 2025 |
| 143 | D.K.D. | Merkel, TX 79536 | Oil & Gas Operator | Dec 2025 |
| 144 | Dark Canyon Resources LLC | Refugio, TX 78377 | Oil Operator | Dec 2025 |
| 145 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Dec 2025 |
| 146 | Delco Operating Company LP | Houston, TX 77056 | Oil & Gas Operator | May 2020 |
| 147 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2025 |
| 148 | Delta Oil & Gas LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 149 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 150 | Dimock Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Dec 2025 |
| 151 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 152 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Dec 2025 |
| 153 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 154 | Double Barrel Oil LLC | Brenham, TX 77834 | Oil & Gas Operator | Dec 2025 |
| 155 | Double M Petroproperties, Inc. | Haskell, TX 79521 | Oil & Gas Operator | Dec 2025 |
| 156 | Dry Fork Production Co., LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 157 | Dunigan Petroleum, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 158 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 159 | Dynamic Production, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 160 | Edgar, Verlon | Belle Chasse, LA 70037 | Oil & Gas Operator | Feb 1998 |
| 161 | El Reno Energy, LLC | Granbury, TX 76048 | Oil & Gas Operator | Dec 2025 |
| 162 | Elam, Jack G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 163 | Elco Oil & Gas | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2014 |
| 164 | Eldorado Oil And Gas, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Nov 1995 |
| 165 | Eldorado Operating Co. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2004 |
| 166 | Encon Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 167 | Encore Energy, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 168 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 169 | Energex Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 170 | Energy Onramp LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 171 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Sep 2025 |
| 172 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 173 | Enrich Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 174 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 175 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 176 | Eratz Investments Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 177 | Esperanza Energy Corp. | Prosper, TX 75078 | Oil & Gas Operator | Mar 2015 |
| 178 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 179 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 180 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 181 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Dec 2025 |
| 182 | Feagan Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 183 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 184 | Fenn, Bill Inc. | Giddings, TX 78942 | Oil & Gas Operator | Mar 2008 |
| 185 | Field Production Company | Cleburne, TX 76033 | Oil & Gas Operator | Mar 2023 |
| 186 | Figgie Natural Resources | Wickliffe, OH 44092 | Oil & Gas Operator | Oct 1995 |
| 187 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Dec 2025 |
| 188 | Five States Operating Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 189 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Dec 2025 |
| 190 | Fletcher Petroleum Corp. | Fairhope, AL 36533 | Oil & Gas Operator | Sep 2025 |
| 191 | Foree, R. L. Trust "A" | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 192 | Forster, Fred Jr. | Midland, TX 79705 | Oil & Gas Operator | Aug 2008 |
| 193 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 194 | Fortune Production Co. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2008 |
| 195 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 196 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 197 | Fredonia Resources Inc. | Longview, TX 75606 | Oil & Gas Operator | Aug 2003 |
| 198 | Freedom Energy, Inc. (I) | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Jun 2003 |
| 199 | Freedom Energy, LTD. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Jun 2011 |
| 200 | FTC Consulting, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |