| 101 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 102 | Cook, Kenneth D. Operator | Midland, TX 79707 | Oil Operator | Jul 2025 |
| 103 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jul 2025 |
| 104 | Costa Resources, Inc. | Dallas, TX 75209 | Oil & Gas Operator | Aug 2003 |
| 105 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 106 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 107 | Couch, Harry L. | Odessa, TX 79762 | Oil & Gas Operator | Nov 1994 |
| 108 | Cox, Martin Regan | Irving, TX 75014 | Oil & Gas Operator | Jul 2025 |
| 109 | CP Exploration III Operating,LLC | Lafayette, LA 70505 | Oil & Gas Operator | Sep 2023 |
| 110 | CPX Energy Operating, LLC | Dallas, TX 75225 | Oil & Gas Operator | Jul 2025 |
| 111 | Crossland Oil & Gas | Dallas, TX 75205 | Oil & Gas Operator | Aug 1994 |
| 112 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 113 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Jul 2025 |
| 114 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 115 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | Feb 2025 |
| 116 | Dakota Resources, Inc. (I) | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 117 | Daniel Oil & Gas | Granbury, TX 76049 | Oil & Gas Operator | Oct 2010 |
| 118 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Jul 2025 |
| 119 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 120 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 121 | Devon Gas Services, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2015 |
| 122 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 123 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 124 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 125 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2025 |
| 126 | Dominion Oklahoma Texas E&P, Inc | Richmond, VA 23219 | Oil & Gas Operator | Sep 2018 |
| 127 | Dorr, John R. | Pecos, TX 79772 | Oil & Gas Operator | Jul 2025 |
| 128 | Double Eagle Operating, LLC | Fort Worth, TX 76113 | Oil & Gas Operator | Jul 2025 |
| 129 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 130 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | May 2025 |
| 131 | Duncan Drilling Co. | Big Spring, TX 79721 | Oil & Gas Operator | Jul 2025 |
| 132 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 133 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 134 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 135 | Eado Production, Inc. | Kermit, TX 79745 | Oil & Gas Operator | Aug 2012 |
| 136 | Eagle Rock Operating Company,LLC | Houston, TX 77252 | Oil & Gas Operator | Oct 2015 |
| 137 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2025 |
| 138 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 139 | Encore Permian Operating, LLC | Uvalde, TX 78801 | Oil & Gas Operator | Jul 2025 |
| 140 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 141 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 142 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Mar 2025 |
| 143 | Energy Transfer Fuel, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 144 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 145 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 146 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 147 | Eqv Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Jul 2025 |
| 148 | Erin Oil Co. | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 149 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 150 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 151 | Etc Field Services LLC | San Antonio, TX 78258 | Oil Operator | Jun 2018 |
| 152 | Etc Oil Co. | Pecos, TX 79772 | Oil & Gas Operator | Mar 2004 |
| 153 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 154 | Evinger, Ernest E. | Midland, TX 79705 | Oil & Gas Operator | Mar 2002 |
| 155 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Jul 2025 |
| 156 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 157 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Jul 2025 |
| 158 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 159 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 160 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Jul 2025 |
| 161 | Felix Energy Holdings II, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2020 |
| 162 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Jul 2025 |
| 163 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 164 | Flavian Oil Company | Dallas, TX 75206 | Gas Operator | Jan 1997 |
| 165 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 166 | Forte Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Dec 2010 |
| 167 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 168 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 169 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | May 2025 |
| 170 | Fulfer Oil And Cattle Co. | Jal, NM 88252 | Oil & Gas Operator | Jul 2025 |
| 171 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 172 | G P II Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2020 |
| 173 | Gap Exploration, LTD. | Naples, FL 34110 | Oil & Gas Operator | Jul 2008 |
| 174 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 175 | Goodnight Midstream Permian, LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 176 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 177 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 178 | Grace Petroleum Operating, LLC | Llano, TX 78643 | Oil & Gas Operator | Jul 2025 |
| 179 | Graham, Bill J. Oil & Gas Corp. | Midland, TX 79710 | Oil & Gas Operator | Nov 2000 |
| 180 | GRB Properties, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2003 |
| 181 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 182 | Greenlake Energy Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 183 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 184 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 185 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 186 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 187 | Halcon Operating Co., Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 188 | Hanley Petroleum Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 189 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 190 | Headington Energy Partners, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 191 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 192 | Headington Oil Company, L.P. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2008 |
| 193 | Helms Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 194 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 195 | Hendon WM E. Jr. Rev LVNG Trust | Everett, WA 98208 | Oil & Gas Operator | Jul 2025 |
| 196 | Henry Resources LLC | Midland, TX 79703 | Oil & Gas Operator | Jul 2025 |
| 197 | Heritage Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Feb 2014 |
| 198 | Heritage Standard Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 199 | High Sky Oil & Gas | Midland, TX 79705 | Oil & Gas Operator | Jun 2008 |
| 200 | Highland Production Company | Midland, TX 79701 | Oil & Gas Operator | Mar 1996 |