| 101 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Dec 2025 |
| 102 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 103 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 104 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 105 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Dec 2025 |
| 106 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 107 | Cowrie Energy LLC | Austin, TX 78703 | Oil & Gas Operator | Dec 2025 |
| 108 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 109 | Crescendo Resources, L.P. | Amarillo, TX 79188 | Oil & Gas Operator | Oct 2025 |
| 110 | Crescent Exploration, LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 111 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 112 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 113 | Crone Oil Company | Gruver, TX 79040 | Oil & Gas Operator | Dec 2025 |
| 114 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 115 | Cross Winds Oil & Gas, LLC | Gruver, TX 79040 | Gas Operator | Dec 2025 |
| 116 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 117 | Curmar Producers | Adairsville, GA 30103 | Oil Operator | Mar 2008 |
| 118 | D & E Oil Co | Perryton, TX 79070 | Oil & Gas Operator | Dec 2025 |
| 119 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 120 | D.W.P. Production | Perryton, TX 79070 | Oil & Gas Operator | Nov 2020 |
| 121 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Dec 2025 |
| 122 | Dalf Energy LLC | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 123 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 124 | Davis, Travis H. | Spearman, TX 79081 | Oil & Gas Operator | Jul 2003 |
| 125 | Davis, Travis H. Gas | Spearman, TX 79081 | Oil & Gas Operator | Dec 2025 |
| 126 | DBP Exploration, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2025 |
| 127 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 128 | Denali Exploration, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Nov 2018 |
| 129 | Derrick Exploration, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Jan 2003 |
| 130 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 131 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Dec 2025 |
| 132 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 133 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Dec 2025 |
| 134 | Dundee Petroleum, Inc. | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 2003 |
| 135 | E R Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 136 | Eagle Exploration Co., Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Dec 2019 |
| 137 | Edwards & Leach Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2005 |
| 138 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 139 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Nov 2025 |
| 140 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 141 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 142 | Enex Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 143 | Enterra Resources, LLC | Edmond, OK 73083 | Oil & Gas Operator | Sep 2025 |
| 144 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 145 | Eqv Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Dec 2025 |
| 146 | Estate Of Jerome B. Herrmann | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2022 |
| 147 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 148 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 149 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 150 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 151 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 152 | Fairway Links Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Aug 2016 |
| 153 | Faulconer Energy, LLC | Tyler, TX 75711 | Oil & Gas Operator | Dec 2025 |
| 154 | Faulconer, Vernon E., Inc. | Tyler, TX 75711 | Oil & Gas Operator | Nov 2025 |
| 155 | Federer, H. C. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 1993 |
| 156 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 157 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 158 | Fortay Inc. | Sunray, TX 79086 | Oil & Gas Operator | Dec 2025 |
| 159 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Sep 2025 |
| 160 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 161 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | Oct 2025 |
| 162 | Frontier Gas Operating Corp. | Houston, TX 77002 | Oil & Gas Operator | Jul 1998 |
| 163 | Fuller Operating Company | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2008 |
| 164 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 165 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 166 | Furr, Roy Estate Of | Midland, TX 79702 | Oil & Gas Operator | Jun 2016 |
| 167 | G C & W Inc. | Borger, TX 79007 | Oil & Gas Operator | Oct 2016 |
| 168 | G. & S. Inc. | Gruver, TX 79040 | Oil & Gas Operator | Nov 2023 |
| 169 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 170 | Gasoil, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Dec 2015 |
| 171 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 172 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 173 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 174 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 175 | Grasen Energy, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2013 |
| 176 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 177 | GS Energy Of Texas, L.L.C. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2006 |
| 178 | Gungoll, Carl E. Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 179 | Gunsmoke Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | May 2012 |
| 180 | H & L Exploration Company, LLC | Amarillo, TX 79114 | Oil & Gas Operator | Dec 2025 |
| 181 | H & L Operating Co., L.L.P. | Amarillo, TX 79114 | Oil & Gas Operator | Aug 2022 |
| 182 | H & L Operating Co., LLC | Amarillo, TX 79114 | Oil & Gas Operator | Mar 2021 |
| 183 | H & L Operating Company | Amarillo, TX 79114 | Oil & Gas Operator | Feb 2020 |
| 184 | H-S Exploration | Gunnison, CO 81230 | Oil & Gas Operator | Dec 2025 |
| 185 | Haider Operating, LLC | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 186 | Hamilton Brothers Oil Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2015 |
| 187 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Dec 2025 |
| 188 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 189 | Harmon, C. E. Oil, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2019 |
| 190 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 191 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 192 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 193 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | Dec 2025 |
| 194 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Dec 2025 |
| 195 | Hicks Exploration, LLC | Dover, OK 73734 | Gas Operator | Dec 2024 |
| 196 | High River Res Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2025 |
| 197 | Highmark Energy Operating LLC | Dallas, TX 75222 | Oil & Gas Operator | Dec 2025 |
| 198 | Holt Brothers | Gruver, TX 79040 | Gas Operator | Dec 2025 |
| 199 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 200 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |