| 101 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 102 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 103 | Marr, M. H. | Dallas, TX 75201 | Gas Operator | Jan 2002 |
| 104 | Mastodon Operating Company, LLC | Houston, TX 77027 | Oil & Gas Operator | May 2025 |
| 105 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 106 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 107 | Mid-Gulf, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Mar 2008 |
| 108 | Mission Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 109 | Moose Oil & Gas Co. | Houston, TX 77002 | Oil & Gas Operator | Feb 2000 |
| 110 | New Bremen Corporation | Austin, TX 78701 | Oil & Gas Operator | Sep 1999 |
| 111 | North Central Oil Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 112 | Odegard Energy, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2020 |
| 113 | Omega Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 114 | Omega Energy, LLC | Corpus Chrsti, TX 78418 | Oil & Gas Operator | May 2025 |
| 115 | Omni Oil & Gas, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Oct 2017 |
| 116 | Orx Resources, L.L.C. | Houston, TX 77067 | Oil & Gas Operator | May 2025 |
| 117 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 118 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 119 | Pemberton, W. C. Oil Co., Inc. | Cameron, TX 76520 | Oil & Gas Operator | May 2025 |
| 120 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 121 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2025 |
| 122 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 123 | Petrogas Operating Corporation | Garland, TX 75043 | Oil Operator | Feb 2010 |
| 124 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 125 | Pierce Junction Petroleum Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2010 |
| 126 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 127 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 128 | Pomykal, Verde Oil Co | Brenham, TX 77833 | Oil & Gas Operator | May 2025 |
| 129 | Powell-McCarroll Partnership | Sachse, TX 75048 | Oil & Gas Operator | May 2025 |
| 130 | Prime Natural Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jun 2007 |
| 131 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 132 | Quail Creek Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 133 | Questar Expl. And Prod. Co. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jul 2011 |
| 134 | R.T.C. Resources, L.P. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 135 | Ranger Oil Company | Canada, 00100 | Oil & Gas Operator | Sep 2001 |
| 136 | Regent Oil & Gas Company, L.P. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2006 |
| 137 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 138 | Rwa Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 1999 |
| 139 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 140 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 141 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 142 | Sandalwood Exploration, L.P. | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 143 | Satex Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2003 |
| 144 | Seashore Energy, Inc. | Boerne, TX 78006 | Oil & Gas Operator | May 2025 |
| 145 | Senora Resources, Inc. | Dime Box, TX 77853 | Oil & Gas Operator | May 2025 |
| 146 | Setex Oil And Gas Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2012 |
| 147 | Shamrock Oil Co. | Sugar Land, TX 77478 | Oil & Gas Operator | Mar 2008 |
| 148 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 149 | Smith, L C Production | Jacksonville, TX 75766 | Oil Operator | May 2025 |
| 150 | Smith, L. C. | Jacksonville, TX 75766 | Oil & Gas Operator | May 2025 |
| 151 | Square Mile Energy, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 152 | Stone & Webster Oil Company, Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 1995 |
| 153 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 154 | Sunwest Oklahoma, Inc | Dallas, TX 75231 | Oil & Gas Operator | May 2023 |
| 155 | SV Energy Company, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2017 |
| 156 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 157 | Synergy Oil & Gas, Inc. (A) | Houston, TX 77024 | Oil & Gas Operator | Aug 2001 |
| 158 | T-N-T Engineering, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 159 | Tahiti PTRS Enrgy Solutions Corp | Long Beach, CA 90807 | Oil Operator | May 2025 |
| 160 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | May 2025 |
| 161 | TC3 Energy Services Company | Bryan, TX 77805 | Oil & Gas Operator | Jan 2005 |
| 162 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | May 2025 |
| 163 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 164 | Tex-Atic Resources, Inc. | S. Lake Tahoe, CA 96150 | Oil & Gas Operator | May 2025 |
| 165 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Mar 2025 |
| 166 | Texas Onshore Energy, Inc. | Austin, TX 78704 | Oil & Gas Operator | May 2025 |
| 167 | Texas-Australia Power Inc. | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2011 |
| 168 | Texegy Operating Company LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2024 |
| 169 | Texical, Inc. | Katy, TX 77491 | Oil & Gas Operator | May 2025 |
| 170 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 171 | Transtexas Gas Corporation | Houston, TX 77265 | Oil & Gas Operator | Aug 2005 |
| 172 | Triangle Three Resources L.L.C. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 173 | Union Gas Operating Company | Houston, TX 77014 | Oil & Gas Operator | May 2025 |
| 174 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 175 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 176 | Verdun Oil & Gas LLC | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 177 | Vista Oil & Gas, Inc. | The Woodlands, TX 77382 | Oil & Gas Operator | Feb 2000 |
| 178 | Vista Resources, Inc. (A) | Midland, TX 79701 | Oil & Gas Operator | Feb 2000 |
| 179 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 180 | Westlands Resources Corporation | Monrovia, CA 91016 | Oil & Gas Operator | May 2025 |
| 181 | Westpark Petroleum, Inc. | Austin, TX 78755 | Oil & Gas Operator | May 2025 |
| 182 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Mar 2025 |
| 183 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 184 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |