| 101 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 102 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Jul 2025 |
| 103 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 104 | Condor Petroleum, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 105 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 106 | Continual Oil & Gas, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Jul 2025 |
| 107 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Feb 2025 |
| 108 | Corda Corporation | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2025 |
| 109 | Core Petro, LLC | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 110 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 111 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 112 | Cotton Valley Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2000 |
| 113 | Coyote Oil, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Jul 2025 |
| 114 | Craruth Energy Corporation | Abilene, TX 79602 | Oil & Gas Operator | Jul 2025 |
| 115 | Creed Operating Co., LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 2025 |
| 116 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Jul 2025 |
| 117 | Crossroads Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 118 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 2025 |
| 119 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 120 | D. A. B. Oil Service, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2012 |
| 121 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | Jul 2025 |
| 122 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Jul 2025 |
| 123 | D.K.D. | Merkel, TX 79536 | Oil & Gas Operator | Jul 2025 |
| 124 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 125 | Delta Exploration Company Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 126 | Denteco Oil Company LLC | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 127 | Denton Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jul 2025 |
| 128 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 129 | Diamond Energy, Inc. | Sherman, TX 75091 | Oil & Gas Operator | Jul 2025 |
| 130 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Jul 2025 |
| 131 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Jul 2025 |
| 132 | Dolch Production, Inc. | San Antonio, TX 78248 | Oil & Gas Operator | Jul 1996 |
| 133 | Doolaree Corporation | Sherman, TX 75091 | Oil & Gas Operator | Jul 2025 |
| 134 | Double M Petroproperties, Inc. | Haskell, TX 79521 | Oil & Gas Operator | Jul 2025 |
| 135 | Drennan, D. E. | Graham, TX 76450 | Oil & Gas Operator | Dec 2011 |
| 136 | Drum, Delton | Liberty, TX 77575 | Oil & Gas Operator | Jul 2005 |
| 137 | Duke, M. L. | Snyder, TX 79549 | Oil & Gas Operator | Mar 2008 |
| 138 | Durango Operating Co., Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2002 |
| 139 | DWR Oil Company | Merkel, TX 79536 | Oil & Gas Operator | Jul 2025 |
| 140 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 141 | E.G. Operating | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 142 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 143 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Jul 2025 |
| 144 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 145 | El Dorado Resources Inc. | Waco, TX 76710 | Oil & Gas Operator | Oct 2009 |
| 146 | Elk Energy Corporation | Denver, CO 80218 | Oil & Gas Operator | Mar 2008 |
| 147 | Encino Exploration, Inc. | George West, TX 78022 | Oil & Gas Operator | Jul 2025 |
| 148 | Encon Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 149 | Endurance Resources III Operating , LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 150 | Energex Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 151 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Mar 2025 |
| 152 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 153 | Enrich Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 154 | Ensign Operating Co. | Denver, CO 80202 | Oil & Gas Operator | Jan 2004 |
| 155 | Erin Oil Exploration, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 1996 |
| 156 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Jul 2025 |
| 157 | Erwin, James D. | Dallas, TX 75225 | Oil & Gas Operator | Nov 1993 |
| 158 | Escudo Oil & Gas, LLC | Houston, TX 77006 | Oil & Gas Operator | Jul 2025 |
| 159 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 160 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 161 | Exp, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 2003 |
| 162 | Express Oil Co. | Hallettsville, TX 77964 | Oil & Gas Operator | Jul 2025 |
| 163 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 164 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Jul 2025 |
| 165 | Feagan Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 166 | Figure 3 Operating LLC | Tyler, TX 75703 | Oil Operator | Dec 2024 |
| 167 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 168 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Jul 2025 |
| 169 | Fisher, Jack Inc. | Abilene, TX 79603 | Oil & Gas Operator | Sep 2001 |
| 170 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Jul 2025 |
| 171 | Foree, R. L. Trust "A" | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 172 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 173 | Fossil Operating, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Jul 2025 |
| 174 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 175 | Freeman Oil Co | Midland, TX 79701 | Oil & Gas Operator | Sep 2014 |
| 176 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Jul 2025 |
| 177 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 178 | G P II Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2020 |
| 179 | Gallo Petroleum, LLC | Colorado City, TX 79512 | Oil Operator | Jul 2025 |
| 180 | GBG Operating Corp. | Wichita Falls, TX 76302 | Oil & Gas Operator | Sep 1998 |
| 181 | Gco Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Dec 1993 |
| 182 | Genie Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 183 | Geostrat Inc. | Addison, TX 75001 | Oil & Gas Operator | Nov 2011 |
| 184 | Gillespie Operating LLC | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 185 | Gillring Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 1994 |
| 186 | Ginnings Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 2025 |
| 187 | GMT Exploration Co Texas, LLC | Houston, TX 77070 | Oil & Gas Operator | Jun 2014 |
| 188 | Golden Horse Group Corp. | Houston, TX 77082 | Oil Operator | Jul 2025 |
| 189 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 190 | Gray, Gordon Operator | Snyder, TX 79550 | Oil & Gas Operator | Jul 2025 |
| 191 | Grayrock Energy II, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Jul 2025 |
| 192 | Great Texas Crude Inc. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Jul 2025 |
| 193 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 194 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 195 | Guffey, Roy, Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Aug 2011 |
| 196 | Guffey, WM. R. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2015 |
| 197 | Gulf Central Petroleum Corp. | Dallas, TX 75252 | Oil & Gas Operator | Jul 2025 |
| 198 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 199 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 200 | H & S Drilling Co Inc | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2016 |