| 101 | Midstates Corporation | San Antonio, TX 78217 | Oil & Gas Operator | May 2025 |
| 102 | Milagro Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Aug 2018 |
| 103 | Mission River Systems, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | May 2025 |
| 104 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 105 | Modena Operating LLC | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 106 | Mueller Engineering Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Feb 2002 |
| 107 | Nadsoilco LLC | Chicago, IL 60606 | Oil & Gas Operator | May 2025 |
| 108 | NBL Permian LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2018 |
| 109 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 110 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | May 2025 |
| 111 | North Padre Explor. Venture LLC | Corpus Chrsti, TX 78473 | Oil & Gas Operator | May 2004 |
| 112 | Novus Oil & Gas, LP | Houston, TX 77042 | Oil & Gas Operator | Nov 2005 |
| 113 | Oro Resources, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2025 |
| 114 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 115 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 116 | Paladin Petroleum III, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 117 | Payne, B.R. Oil & Gas, Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Feb 2006 |
| 118 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | May 2025 |
| 119 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 120 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2025 |
| 121 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jul 2024 |
| 122 | Pintex Operating Inc. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Feb 2005 |
| 123 | Pmo | Garland, TX 75040 | Oil & Gas Operator | Feb 2018 |
| 124 | Price Drilling & Exploration Co. | Benavides, TX 78341 | Oil & Gas Operator | Jul 2013 |
| 125 | Progas Operating, Inc | Red Rock, TX 78662 | Oil & Gas Operator | May 2025 |
| 126 | Property Development Group, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | May 2025 |
| 127 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 128 | Riggs, Don R. | San Antonio, TX 78270 | Oil & Gas Operator | Aug 2003 |
| 129 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 130 | Roy Jackson Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 131 | Runion Oil, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 2003 |
| 132 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |
| 133 | Salt Creek Production, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | May 2025 |
| 134 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 135 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2025 |
| 136 | Sinclair Development, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 137 | Smith Production Inc. | The Woodlands, TX 77381 | Oil & Gas Operator | May 2025 |
| 138 | Southern Resource Company | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Mar 2022 |
| 139 | Sue-Ann Operating, L.C. | Victoria, TX 77903 | Oil & Gas Operator | May 2025 |
| 140 | Suemaur Expl. & Prod., LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jun 2024 |
| 141 | Suemaur Exploration, Inc. | Corpus Chrsti, TX 78470 | Oil & Gas Operator | Mar 2008 |
| 142 | Sutton Producing Corp. | San Antonio, TX 78270 | Oil & Gas Operator | May 2025 |
| 143 | T.O.I. | Midland, TX 79710 | Oil & Gas Operator | Mar 2001 |
| 144 | Tecpetrol Operating LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2015 |
| 145 | Tejas Petroleum Resources, LLC | Aubrey, TX 76227 | Oil & Gas Operator | May 2025 |
| 146 | Texas Energy & Environmental Inc | Houston, TX 77269 | Oil & Gas Operator | Oct 1998 |
| 147 | Texas Fuel Company | Galveston, TX 77550 | Oil & Gas Operator | May 2025 |
| 148 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 149 | Triad Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Oct 2011 |
| 150 | Tucker Operating Co., Inc. | Victoria, TX 77903 | Oil & Gas Operator | May 2025 |
| 151 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 152 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 153 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | May 2025 |
| 154 | Us. Fuels, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 155 | Vantage Point Operating Co | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 156 | Vector Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | May 2025 |
| 157 | Vtex Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 158 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 159 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 160 | Windrush Operating Co., L.L.C. | Longville, LA 70652 | Oil & Gas Operator | May 2025 |
| 161 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 162 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | May 2025 |
| 163 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 164 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |