| 101 | Crossroads Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2018 |
| 102 | Cuervo Resources, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Oct 1996 |
| 103 | Cuervo, Inc. | FT Stockton, TX 79735 | Oil & Gas Operator | Apr 2026 |
| 104 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Apr 2026 |
| 105 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | Feb 2026 |
| 106 | Dale Operating Company | Dallas, TX 75207 | Oil & Gas Operator | Apr 2026 |
| 107 | Dartex Energy Corporation | Austin, TX 78731 | Oil & Gas Operator | Apr 2026 |
| 108 | Davcro Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2003 |
| 109 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 110 | Delek Energy Systems Us, Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 111 | Denali Exploration, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Nov 2018 |
| 112 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 113 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2026 |
| 114 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Apr 2026 |
| 115 | DKM Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2011 |
| 116 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 117 | Double Barrel Oil LLC | Brenham, TX 77834 | Oil & Gas Operator | Apr 2026 |
| 118 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 119 | Dreher, George R. | Midland, TX 79702 | Oil & Gas Operator | Jan 2018 |
| 120 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 121 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 122 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2026 |
| 123 | Eclipse Petroleum Corporation | La Grange, TX 78945 | Oil & Gas Operator | Aug 2003 |
| 124 | El Ran, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2026 |
| 125 | Encore Energy Partners Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2015 |
| 126 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Feb 2026 |
| 127 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 128 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jan 2026 |
| 129 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2026 |
| 130 | Enpower Resources Inc. | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2026 |
| 131 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 132 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Apr 2026 |
| 133 | Extech Operating, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2026 |
| 134 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 135 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Apr 2026 |
| 136 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2026 |
| 137 | Fagadau Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2006 |
| 138 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Apr 2026 |
| 139 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Apr 2026 |
| 140 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | Apr 2026 |
| 141 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Apr 2026 |
| 142 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Apr 2026 |
| 143 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 144 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2026 |
| 145 | Four Sevens Oil Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2001 |
| 146 | Fuller Operating Company | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2008 |
| 147 | Great Western Drilling Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 148 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2026 |
| 149 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 150 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 151 | GTG Operating, LLC | Tyler, TX 75713 | Oil & Gas Operator | Apr 2026 |
| 152 | H & S Drilling Co Inc | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2016 |
| 153 | Hadaway Consult And Engineer,LLC | Canadian, TX 79014 | Oil & Gas Operator | Apr 2026 |
| 154 | Halcon Resources Operating, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2013 |
| 155 | Halvey Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 156 | Hamill, Flora Oil Co. | Levelland, TX 79336 | Oil & Gas Operator | Apr 2026 |
| 157 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 158 | Herbig Oil & Gas Co. | Midland, TX 79705 | Oil & Gas Operator | Apr 2026 |
| 159 | Herbig, J F | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 160 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 161 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Apr 2026 |
| 162 | HMH Operators, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 163 | Houghton Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2009 |
| 164 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Apr 2026 |
| 165 | Huff, Jack | Midland, TX 79710 | Oil & Gas Operator | Dec 2004 |
| 166 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 167 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 168 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 169 | Intercoast Oil And Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Jun 1997 |
| 170 | Jap Oil Corporation | Levelland, TX 79336 | Oil & Gas Operator | May 1994 |
| 171 | Jetta Operating Company, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2026 |
| 172 | Jin Petroleum LLC | New Braunfels, TX 78130 | Oil Operator | Apr 2026 |
| 173 | JJ Operations, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Apr 2026 |
| 174 | Jones Operating Company | Levelland, TX 79336 | Oil & Gas Operator | Oct 2000 |
| 175 | Joplin Oil Co., Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Apr 2026 |
| 176 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 177 | Kala Oil Company | Sundown, TX 79372 | Oil & Gas Operator | Apr 2026 |
| 178 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 179 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Apr 2026 |
| 180 | Ken-Cas Oil Co. | Levelland, TX 79336 | Oil & Gas Operator | Apr 1998 |
| 181 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Feb 2026 |
| 182 | Kilmarnock Oil Company, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2026 |
| 183 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 184 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 185 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2026 |
| 186 | Latigo Petroleum Texas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 187 | Lavanco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2006 |
| 188 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 189 | Layton Enterprises, Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Apr 2007 |
| 190 | Leeper Oil Exp. & Prod. Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2005 |
| 191 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Apr 2026 |
| 192 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 193 | Linn Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 194 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Apr 2026 |
| 195 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 196 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 197 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 198 | Lynx Operating Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2026 |
| 199 | M & D Oil & Gas | Levelland, TX 79336 | Oil & Gas Operator | Aug 2000 |
| 200 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |