| 101 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Jul 2025 |
| 102 | D.O.E. Energy | Palestine, TX 75801 | Oil & Gas Operator | Jul 2025 |
| 103 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 104 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 105 | Dedica Energy Corporation | Mattoon, IL 61938 | Oil & Gas Operator | Mar 2008 |
| 106 | Denton Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jul 2025 |
| 107 | Desert Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 108 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 109 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 110 | Diamond Energy, Inc. | Sherman, TX 75091 | Oil & Gas Operator | Jul 2025 |
| 111 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 112 | Discovery Energy Corp. CC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Jul 2025 |
| 113 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 114 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2025 |
| 115 | Dodson, Wayne Consultants, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Jul 2003 |
| 116 | Dragon Operating, LLC | Tulsa, OK 74137 | Oil Operator | Jul 2025 |
| 117 | Duncan Drilling Co. | Big Spring, TX 79721 | Oil & Gas Operator | Jul 2025 |
| 118 | Dunigan Operating Company, Inc. | Austin, TX 78755 | Oil & Gas Operator | Jul 2025 |
| 119 | Eastland Exploration, Inc. | Austin, TX 78763 | Oil & Gas Operator | Apr 1997 |
| 120 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 121 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 122 | Egi, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Jul 2025 |
| 123 | Elkhorn Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 1995 |
| 124 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 125 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 126 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Mar 2025 |
| 127 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2025 |
| 128 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 129 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 130 | Etl Hydrocarbons, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Jul 2025 |
| 131 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Jul 2025 |
| 132 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 133 | F & M Oil & Gas Co | Midland, TX 79702 | Oil & Gas Operator | Feb 2000 |
| 134 | F Y B Investments, Inc. | Midland, TX 79711 | Oil & Gas Operator | Sep 1995 |
| 135 | Federal Oil, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Jul 2025 |
| 136 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 137 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 138 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Jul 2025 |
| 139 | Firewheel Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2017 |
| 140 | First Permian, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 141 | Firstrike Energy Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Jan 2025 |
| 142 | Fiveash Operating Company, Inc. | Christoval, TX 76935 | Oil & Gas Operator | Aug 2003 |
| 143 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Jul 2025 |
| 144 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 145 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Jul 2025 |
| 146 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 147 | Fossil Fuels Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2000 |
| 148 | Freeman, Kathleen Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 1996 |
| 149 | Freestone Resources, Inc | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 150 | G Productions | Snyder, TX 79549 | Oil & Gas Operator | Jun 1998 |
| 151 | Gallo Petroleum, LLC | Colorado City, TX 79512 | Oil Operator | Jul 2025 |
| 152 | Gco Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Dec 1993 |
| 153 | Geomark Resources, L.L.C. | Lubbock, TX 79453 | Oil & Gas Operator | Jul 2025 |
| 154 | Gilmore, Leo Oil, Inc. | Holliday, TX 76366 | Oil & Gas Operator | Jul 2025 |
| 155 | Gladson, Willard | Ira, TX 79527 | Oil & Gas Operator | Jun 1998 |
| 156 | Gladson, Willard Estate Of | Odessa, TX 79762 | Oil & Gas Operator | Jul 2025 |
| 157 | GNG Operating LLC | Graham, TX 76450 | Oil Operator | Jul 2025 |
| 158 | Goodrich, John S. | Midland, TX 79705 | Oil & Gas Operator | Sep 1996 |
| 159 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 160 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 161 | Grasha, Matthew P. | Midland, TX 79709 | Oil & Gas Operator | Feb 1995 |
| 162 | Gray, Gordon Operator | Snyder, TX 79550 | Oil & Gas Operator | Jul 2025 |
| 163 | Gray, W. H. Operating | Odessa, TX 79762 | Oil Operator | Jul 2025 |
| 164 | Grayhawk Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2006 |
| 165 | Grayrock Energy II, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Jul 2025 |
| 166 | Green Light Operating, LLC. | Austin, TX 78746 | Oil Operator | Jul 2025 |
| 167 | Greystone Oil & Gas, LLP | Houston, TX 77057 | Oil & Gas Operator | Dec 2015 |
| 168 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 169 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Jul 2025 |
| 170 | Guthrie, A. K. Operating Co. | Big Spring, TX 79720 | Oil & Gas Operator | Mar 1996 |
| 171 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 172 | Hall Oil & Gas | Coahoma, TX 79511 | Oil & Gas Operator | Jul 2025 |
| 173 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 174 | Hawkeye Transmission Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2000 |
| 175 | Hays, Mrs. Earl (Cora) | Big Spring, TX 79720 | Oil & Gas Operator | Apr 2005 |
| 176 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Jul 2025 |
| 177 | Highland Production Company | Midland, TX 79701 | Oil & Gas Operator | Mar 1996 |
| 178 | Highmark Energy Operating, LLC | Dallas, TX 75222 | Oil & Gas Operator | Jul 2025 |
| 179 | Highpeak Energy Holdings, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 180 | HMH Operators, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 181 | Hodge T F | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2007 |
| 182 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Jul 2025 |
| 183 | Hope Energy, L.L.C. | Snyder, TX 79549 | Oil & Gas Operator | Jul 2025 |
| 184 | Hrubetz Oil Co. | Dallas, TX 75225 | Oil Operator | Sep 1986 |
| 185 | Hrubetz Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Feb 1999 |
| 186 | Huff, Jack | Midland, TX 79710 | Oil & Gas Operator | Dec 2004 |
| 187 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 188 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 189 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Jul 2025 |
| 190 | Ira Testers | Ira, TX 79527 | Oil & Gas Operator | Mar 2024 |
| 191 | Ira Testers, LLC | Ira, TX 79527 | Oil Operator | Jul 2025 |
| 192 | J & J Services Company | San Angelo, TX 76904 | Oil & Gas Operator | Jul 2025 |
| 193 | J & R Producing Co. | Plano, TX 75024 | Oil & Gas Operator | Dec 2012 |
| 194 | Journey Operating, L.L.C. | Sugar Land, TX 77496 | Oil & Gas Operator | Aug 2006 |
| 195 | Jtex Oil Company, LLC | Colorado City, TX 79512 | Oil & Gas Operator | Jan 2025 |
| 196 | Jva Operating Company | Midland, TX 79710 | Oil & Gas Operator | Oct 2021 |
| 197 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 198 | Katsco Energy, Inc. | Round Rock, TX 78664 | Oil & Gas Operator | Jul 2025 |
| 199 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Jul 2025 |
| 200 | Keeley Oil, L.L.C. | Dallas, TX 75225 | Oil Operator | Jul 2025 |