| 101 | Houston Gulf Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2025 |
| 102 | Houston Operating, Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 2025 |
| 103 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 104 | Indexgeo & Associates, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2009 |
| 105 | Infinity Hydrocarbons LLC | Houston, TX 77079 | Oil & Gas Operator | Aug 2022 |
| 106 | Iron Ridge Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Mar 2025 |
| 107 | Italian-American Oil Co., Inc. | Tomball, TX 77377 | Oil & Gas Operator | Mar 2025 |
| 108 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Mar 2025 |
| 109 | Jamex II LTD., L.L.P. | Dallas, TX 75252 | Oil & Gas Operator | Sep 2002 |
| 110 | Jamex, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Mar 2025 |
| 111 | JHP Operating, LLC | Dallas, TX 75225 | Oil & Gas Operator | Mar 2025 |
| 112 | Jilpetco, Inc. | Fort Worth, TX 76121 | Oil & Gas Operator | Mar 2025 |
| 113 | Jin Petroleum LLC | New Braunfels, TX 78130 | Oil Operator | Mar 2025 |
| 114 | Juneau Energy, LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 115 | Kachina Oil & Gas Inc. | Austin, TX 78766 | Oil & Gas Operator | Jul 2002 |
| 116 | Kimbrel Oil Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2025 |
| 117 | King Operating Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Mar 2025 |
| 118 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 119 | L & R Energy Corporation | Spearman, TX 79081 | Oil & Gas Operator | Nov 2014 |
| 120 | Leexus Oil LLC | Giddings, TX 78942 | Oil & Gas Operator | Mar 2025 |
| 121 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 122 | Magnolia Oil & Gas Operating LLC | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 123 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 124 | Marino, Charles B. | Tomball, TX 77377 | Oil & Gas Operator | Mar 2025 |
| 125 | Marlin Energy Resources, LLC | Lafayette, LA 70503 | Oil & Gas Operator | May 2018 |
| 126 | Marlin Energy Southwest GP, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Mar 2025 |
| 127 | MD America Energy, LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2022 |
| 128 | Medallion Oil Company | Houston, TX 77251 | Oil & Gas Operator | Jan 2012 |
| 129 | Mego Resources, LLC | Taft, TX 78390 | Oil & Gas Operator | Mar 2025 |
| 130 | Milagro Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Aug 2018 |
| 131 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | Mar 2025 |
| 132 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 133 | Moon Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Mar 2003 |
| 134 | Morris, W. Dale Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Mar 2025 |
| 135 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | Mar 2025 |
| 136 | New Gulf Resources, LLC | Tulsa, OK 74133 | Oil & Gas Operator | May 2018 |
| 137 | North Central Oil Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 138 | Nuevo Energy Company | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 139 | Omega Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 140 | One World Operating, LLC | Tampa, FL 33602 | Oil & Gas Operator | Mar 2025 |
| 141 | Outline Oil Corp. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2025 |
| 142 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 143 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 144 | Paleo Oil Company LLC | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Mar 2025 |
| 145 | Panther Creek Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2012 |
| 146 | Par Producing Company | Snyder, TX 79550 | Oil & Gas Operator | Jun 2017 |
| 147 | Paradis Investments, L.L.C. | Bellaire, TX 77401 | Oil Operator | Jun 2020 |
| 148 | Pardus Oil & Gas Operating, LP | Tulsa, OK 74114 | Oil & Gas Operator | Apr 2022 |
| 149 | Patterson Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Mar 2025 |
| 150 | Patterson Petroleum LLC | Snyder, TX 79550 | Oil & Gas Operator | Oct 2007 |
| 151 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 152 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 153 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Dec 2024 |
| 154 | Petrocorp Incorporated,A TX.Corp | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2005 |
| 155 | Petroleum Resource Management Co | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 156 | Petroreal Inc. | Temple, TX 76503 | Oil & Gas Operator | Mar 2025 |
| 157 | Phoenix Operating Company Of TX. | Dallas, TX 75206 | Oil & Gas Operator | Jun 1995 |
| 158 | Pierce Operating Company, L.L.C. | Bryan, TX 77808 | Oil & Gas Operator | Dec 2018 |
| 159 | Ponderosa Oil & Gas, LLC | Houston, TX 77008 | Oil & Gas Operator | Mar 2025 |
| 160 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2025 |
| 161 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Mar 2025 |
| 162 | Producers Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 2000 |
| 163 | Progenies Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |
| 164 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Mar 2025 |
| 165 | Proven Natural Resources LLC | Rockwall, TX 75032 | Oil & Gas Operator | Mar 2025 |
| 166 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2025 |
| 167 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 168 | Reed Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 169 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2025 |
| 170 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Mar 2025 |
| 171 | Rio Bravo Oil Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2002 |
| 172 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 173 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 174 | Sandel Energy, Inc. | Huntsville, TX 77342 | Oil & Gas Operator | Apr 2004 |
| 175 | Sandel Operating Company | Huntsville, TX 77340 | Oil & Gas Operator | Mar 2025 |
| 176 | Santa Rosa Operating, LLC | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Mar 2025 |
| 177 | Sem Operating Company LLC | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 178 | Seneca Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2017 |
| 179 | Setex Oil And Gas Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2012 |
| 180 | Sharon Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Aug 2010 |
| 181 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Dec 2024 |
| 182 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Mar 2025 |
| 183 | Sikes Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2003 |
| 184 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Mar 2025 |
| 185 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 186 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
| 187 | Smith, L. C. | Jacksonville, TX 75766 | Oil & Gas Operator | Mar 2025 |
| 188 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 189 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 190 | South Oil, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 191 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 192 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 193 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Mar 2025 |
| 194 | Southwest Resources, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Mar 2025 |
| 195 | Square One Corporation | Giddings, TX 78942 | Oil & Gas Operator | Dec 2012 |
| 196 | Stanton Mineral Development Inc | Austin, TX 78759 | Oil & Gas Operator | Mar 2025 |
| 197 | Stoneham Oil Company | Houston, TX 77002 | Oil & Gas Operator | Sep 1995 |
| 198 | Strago Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 1994 |
| 199 | Stratlynn, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 200 | Stroud Energy, LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2006 |