| 101 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 102 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 103 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 104 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Apr 2024 |
| 105 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Apr 2024 |
| 106 | Caprock Exploration, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Feb 2024 |
| 107 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 108 | Cazador Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 109 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 110 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 111 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 112 | Charger Shale Oil Operating, LLC | Austin, TX 78704 | Oil & Gas Operator | Sep 2021 |
| 113 | Charles A. Bird, Estate | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 114 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 115 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 116 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 117 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 118 | Cholla Petroleum, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 119 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 120 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 121 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Apr 2024 |
| 122 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 123 | Civitas Permian Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 124 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 125 | CLR Secondary Recovery, LLC | Mabank, TX 75147 | Oil & Gas Operator | Apr 2024 |
| 126 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 127 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Dec 2023 |
| 128 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Apr 2024 |
| 129 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 130 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 131 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 132 | Compass Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 133 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2024 |
| 134 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 135 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 136 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 137 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 138 | Concord Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2021 |
| 139 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 140 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 141 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 142 | Coppertop | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2024 |
| 143 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 144 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Apr 2024 |
| 145 | Costa Resources, Inc. | Dallas, TX 75209 | Oil & Gas Operator | Aug 2003 |
| 146 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 147 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 148 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 149 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 150 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 151 | Crone Oil Company | Gruver, TX 79040 | Oil & Gas Operator | Apr 2024 |
| 152 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 153 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 154 | D & B Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 155 | D & V Oil Co., LP | San Angelo, TX 76909 | Oil & Gas Operator | Jan 2019 |
| 156 | D G D Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | Apr 2024 |
| 157 | Darco Operators | Big Lake, TX 76932 | Oil & Gas Operator | Apr 2024 |
| 158 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Dec 2023 |
| 159 | De IV Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 160 | De Operating LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2017 |
| 161 | De3 Operating LLC | Irving, TX 75038 | Oil & Gas Operator | Jun 2021 |
| 162 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 163 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 164 | Devx Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Feb 2004 |
| 165 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 166 | Digital Operating Company LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 167 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 168 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 169 | Dittman, D. W. | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2007 |
| 170 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Apr 2024 |
| 171 | Dominion Natural Resources LLC | Dallas, TX 75367 | Oil & Gas Operator | Apr 2024 |
| 172 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 2014 |
| 173 | Double Eagle Operating, LLC | Fort Worth, TX 76113 | Oil & Gas Operator | Apr 2024 |
| 174 | Driftwood Energy Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2022 |
| 175 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Feb 2024 |
| 176 | Dunigan Petroleum, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 177 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 178 | E/T Petroleum Co. | Big Lake, TX 76932 | Oil & Gas Operator | Aug 2014 |
| 179 | Eagle Capital Partners, LLC | Eunice, NM 88231 | Oil & Gas Operator | Apr 2024 |
| 180 | Eagle Operating | Midland, TX 79707 | Oil & Gas Operator | May 2013 |
| 181 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 182 | Edmar Company, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 183 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 184 | Eggleston, Garaland | Big Lake, TX 76932 | Oil & Gas Operator | Aug 2003 |
| 185 | Egi, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Apr 2024 |
| 186 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 187 | Elco Oil & Gas | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2014 |
| 188 | Eldorado Oil And Gas, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Nov 1995 |
| 189 | Elevation Resources LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 190 | Ellison Lease Operating | Bridgeport, TX 76426 | Oil & Gas Operator | Apr 2024 |
| 191 | Elson Oil Company | Tulsa, OK 74103-4429 | Oil & Gas Operator | Dec 2016 |
| 192 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 193 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 194 | Enduring Resources, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Jan 2024 |
| 195 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 196 | Energy Management Company | Kilgore, TX 75663 | Oil Operator | Apr 2020 |
| 197 | Energy Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 198 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2024 |
| 199 | Eng, George E. | Midland, TX 79701 | Oil & Gas Operator | Dec 2011 |
| 200 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |