| 101 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 102 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 103 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 104 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 105 | Cholla Petroleum, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 106 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 107 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2024 |
| 108 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 109 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 110 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 111 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 112 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 113 | Compass Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2024 |
| 114 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2024 |
| 115 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 116 | Concord Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2021 |
| 117 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 118 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 119 | Continental Exploration LLC | Lufkin, TX 75915 | Oil & Gas Operator | Apr 2024 |
| 120 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Apr 2023 |
| 121 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 122 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2024 |
| 123 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 124 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 125 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 126 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 127 | CP Energy LLC | Edmond, OK 73034 | Oil Operator | Feb 2024 |
| 128 | Creek Operating Company, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Sep 1998 |
| 129 | Crestmont Operating LLC | New York, NY 10151 | Oil Operator | Apr 2024 |
| 130 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 131 | Crossfoot Operating, LLC | Houston, TX 77227 | Oil & Gas Operator | Apr 2024 |
| 132 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | Apr 2024 |
| 133 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 134 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 135 | D & B Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 136 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | Nov 2023 |
| 137 | Dakota Resources, Inc. (I) | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 138 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 139 | Davis & Carr Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Jun 1994 |
| 140 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Jan 2024 |
| 141 | De IV Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 142 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 143 | Devon Energy Operating Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2013 |
| 144 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 145 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 146 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 147 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 148 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 149 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 150 | Dominion Operating, LLC | Midland, TX 79708 | Oil Operator | Mar 2018 |
| 151 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 2014 |
| 152 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | Apr 2024 |
| 153 | DP Permian Operator, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 154 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 155 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 156 | E.G. Operating | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 157 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2024 |
| 158 | Eagle Capital Partners, LLC | Eunice, NM 88231 | Oil & Gas Operator | Apr 2024 |
| 159 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 160 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 161 | Edge Oil And Gas, LLC | Abilene, TX 79602 | Oil Operator | Apr 2024 |
| 162 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 163 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 164 | Elam, Jack G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 165 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Feb 2024 |
| 166 | Element Petro Operating II, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2016 |
| 167 | Element Petroleum Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2015 |
| 168 | Elk River Resources, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Oct 2023 |
| 169 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 170 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 171 | Energy Hunter Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Feb 2019 |
| 172 | Energy Resources Oil & Gas Corp. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 1994 |
| 173 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 174 | Engelke, R. H. | San Antonio, TX 78230 | Oil & Gas Operator | Apr 2024 |
| 175 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 176 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 177 | Enterprise Crude Oil LLC | Oklahoma City, OK 73102 | Oil Operator | Aug 2011 |
| 178 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 179 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 180 | Estancia Oil & Gas, LLC | Austin, TX 78716 | Oil & Gas Operator | Apr 2024 |
| 181 | Exco Partners Operating PTSHP LP | Dallas, TX 75251 | Oil & Gas Operator | Jan 2009 |
| 182 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jan 2024 |
| 183 | Exco/Hgi JV Assets, LLC | Dallas, TX 75251 | Oil & Gas Operator | Jun 2014 |
| 184 | Exl Petroleum Operating Inc. | Midland, TX 79705 | Oil & Gas Operator | Feb 2020 |
| 185 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 186 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 2023 |
| 187 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 188 | Fasken, Barbara | Midland, TX 79701 | Oil & Gas Operator | Dec 1995 |
| 189 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Apr 2024 |
| 190 | Forcenergy Onshore Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 191 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 192 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 193 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Apr 2024 |
| 194 | Fourway Oil Company | Longview, TX 75606 | Oil & Gas Operator | Apr 2024 |
| 195 | Fremont Energy, L.P. | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 196 | Fulfer Oil And Cattle Co. | Jal, NM 88252 | Oil & Gas Operator | Apr 2024 |
| 197 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 198 | Furie Operating, LLC | League City, TX 77573 | Oil & Gas Operator | Nov 2015 |
| 199 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 200 | Geomark Resources, L.L.C. | Lubbock, TX 79453 | Oil & Gas Operator | Apr 2024 |