| 101 | Cantro Exploration, Inc. | San Antonio, TX 78270 | Oil & Gas Operator | May 2000 |
| 102 | Canyon E & P Company | Dallas, TX 75206 | Oil Operator | Oct 2013 |
| 103 | Capstone Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2015 |
| 104 | Carbon Energy Corporation (USA) | Denver, CO 80290 | Oil & Gas Operator | Jul 2004 |
| 105 | Carl Schellinger | Roswell,, NM 88201 | Oil & Gas Operator | May 2010 |
| 106 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 107 | Caza Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 108 | CBS Operating Corp | Midland, TX 79702 | Oil & Gas Operator | Aug 2012 |
| 109 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 110 | Central Resources, Inc. | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 111 | CFM Oil, LLC | Artesia, NM 88210 | Oil & Gas Operator | Feb 2026 |
| 112 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2026 |
| 113 | Charles B Gillespie Jr | Midland, TX 79701 | Oil & Gas Operator | Jun 2001 |
| 114 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 115 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 116 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 117 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 118 | Chisholm Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2022 |
| 119 | Chisos, LTD | Houston, TX 77098 | Oil & Gas Operator | Apr 2026 |
| 120 | Chuza Operating | Midland, TX 79710 | Oil & Gas Operator | Sep 2006 |
| 121 | Cibola Energy Corp | Albuquerque, NM 87103 | Oil & Gas Operator | Oct 2017 |
| 122 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 123 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Apr 2026 |
| 124 | Civitas Permian Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Apr 2026 |
| 125 | Claco Oil Co | Artesia, NM 88210 | Oil & Gas Operator | Dec 2014 |
| 126 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 127 | CM5 Resources, LLC | Artesia, NM 88211 | Oil & Gas Operator | Feb 2026 |
| 128 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2026 |
| 129 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 130 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 131 | COG Production LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 132 | Colgate Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 133 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 134 | Concho Exploration | Midland, TX 79701 | Oil & Gas Operator | Feb 2004 |
| 135 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 136 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 137 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 138 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Apr 2026 |
| 139 | Corinne Grace | Carlsbad, NM 88220 | Oil & Gas Operator | Jan 2011 |
| 140 | Corkran Energy, LP | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 141 | Costilla Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 142 | Coterra Energy Operating Co. | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 143 | Crump Petroleum Corp | Midland, TX 79710 | Oil & Gas Operator | Feb 1999 |
| 144 | Curtis Hankamer | Houston, TX 77024 | Oil & Gas Operator | Jun 1997 |
| 145 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 146 | Dalen Resources Oil & Gas Co | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 147 | David G Hammond | Artesia, NM 88211 | Oil Operator | May 2013 |
| 148 | David H Arrington Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Mar 2026 |
| 149 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 150 | Dennis Langlitz | Carlsbad, NM 88220 | Oil Operator | Jul 2009 |
| 151 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
| 152 | Devon Energy Operating Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2013 |
| 153 | Devon Energy Production Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2015 |
| 154 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2026 |
| 155 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 156 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 157 | Dickson Petroleum | Midland, TX 79710 | Oil & Gas Operator | Nov 1998 |
| 158 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 159 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Apr 2026 |
| 160 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Jan 2026 |
| 161 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 162 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 163 | Doral Energy Corp. | Midland, TX 79708 | Oil & Gas Operator | Jun 2012 |
| 164 | Dorothy Boyce | Artesia, NM 88210 | Oil & Gas Operator | Sep 2000 |
| 165 | Douglas Oil & Gas LP | State College, PA 16803 | Oil & Gas Operator | Dec 2007 |
| 166 | Doyle Hartman | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 167 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 168 | Dwight A Tipton | Houston, TX 77208 | Oil & Gas Operator | Apr 2025 |
| 169 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 170 | Earnest Producing Corporation | Midland, TX 79704 | Oil & Gas Operator | Apr 2026 |
| 171 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2026 |
| 172 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 173 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 174 | Edge Petroleum Oper. Co., Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 175 | Edmar Company, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 176 | El Ran, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2026 |
| 177 | Elliott Oil Co | Roswell, NM 88202 | Oil & Gas Operator | Nov 2001 |
| 178 | Emkey Companies, LLC | Dallas, TX 75251 | Oil & Gas Operator | May 2016 |
| 179 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Feb 2026 |
| 180 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 181 | Endurance Resources LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2017 |
| 182 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 183 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2026 |
| 184 | Enerstar Resources LTD Co. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 185 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 186 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 187 | EOG A Resources, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Dec 2018 |
| 188 | EOG M Resources, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Dec 2018 |
| 189 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 190 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 191 | Ers Resources, LLC | Irving, TX 75038 | Oil Operator | Sep 2010 |
| 192 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 193 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Jan 2026 |
| 194 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 195 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2026 |
| 196 | Fae II Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Feb 2026 |
| 197 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2026 |
| 198 | Fairway Resources Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Aug 2022 |
| 199 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 200 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Apr 2026 |