| 101 | Left-Hand Ranch, LLC | Helotes, TX 78023 | Oil Operator | May 2025 |
| 102 | Longshot Energy LLC | League City, TX 77573 | Oil Operator | May 2025 |
| 103 | M. J. G., Inc. | Alice, TX 78333 | Oil & Gas Operator | Jul 2010 |
| 104 | Maverick Energy Group, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 105 | Mayo Oil Co. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2019 |
| 106 | Millennium Petro-Physics, Inc. | Corpus Chrsti, TX 78480 | Oil & Gas Operator | May 2025 |
| 107 | Mobile Production Systems, Inc. | Austin, TX 78711 | Oil & Gas Operator | Feb 1995 |
| 108 | Mojave Resources, LLC | New Braunfels, TX 78132 | Oil Operator | May 2025 |
| 109 | More Texas Oil | Von Ormy, TX 78073 | Oil & Gas Operator | May 2025 |
| 110 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | May 2025 |
| 111 | Nails Operating Company LLC | Hondo, TX 78861 | Oil Operator | May 2025 |
| 112 | Nev-Tex Oil & Gas, Inc. | Reno, NV 89504 | Oil & Gas Operator | May 2025 |
| 113 | Niedorf, Patrick Stephen | San Antonio, TX 78239 | Oil Operator | Jul 2001 |
| 114 | Nutek Oil Inc | San Antonio, TX 78254 | Oil & Gas Operator | Feb 2006 |
| 115 | Oilex Int'L Investments, Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 116 | Ojt, LLC | Richmond, TX 77469 | Oil Operator | May 2025 |
| 117 | Old Chief Oil, LLC | New Braunfels, TX 78132 | Oil Operator | May 2025 |
| 118 | Omni Oil & Gas, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Oct 2017 |
| 119 | Overstreet, Jamie L | Hondo, TX 78861 | Oil & Gas Operator | May 2025 |
| 120 | P.S.N. Petroleum, Inc. | San Antonio, TX 78233 | Oil & Gas Operator | May 2025 |
| 121 | Park Avenue Resources, Inc. | San Antonio, TX 78212 | Oil Operator | May 2025 |
| 122 | Petro Lions, LLC | Somerset, TX 78069 | Oil Operator | May 2025 |
| 123 | Petro-Tex Energy & Expl.Co.,Inc. | Llano, TX 78643 | Oil & Gas Operator | May 2025 |
| 124 | Petrosaurus, Inc. | Somerset, TX 78069 | Oil Operator | May 2025 |
| 125 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jul 2024 |
| 126 | PMR Energy, LLC | San Antonio, TX 78209 | Oil Operator | May 2025 |
| 127 | Premier Minerals, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 128 | Production Resources, Inc. | Castroville, TX 78009 | Oil & Gas Operator | May 2025 |
| 129 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | May 2025 |
| 130 | Regency Energy, Inc. | Crystal City, TX 78839 | Oil & Gas Operator | May 2025 |
| 131 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 132 | Rex Oil, A Texas Partnership | Hondo, TX 78861 | Oil & Gas Operator | May 2003 |
| 133 | Richardson Oil Company | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2003 |
| 134 | Riggs, Don R. | San Antonio, TX 78270 | Oil & Gas Operator | Aug 2003 |
| 135 | Rlu Oil & Gas, Inc. | Devine, TX 78016 | Oil & Gas Operator | May 2025 |
| 136 | Rlu Operating, LLC | Devine, TX 78016 | Oil & Gas Operator | May 2025 |
| 137 | Rorico Oil Company | Argyle, TX 76226 | Oil & Gas Operator | May 2025 |
| 138 | RPG Operating LLC | MC Queeney, TX 78123 | Oil Operator | May 2025 |
| 139 | S.O.C. Investors, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 140 | Sabinal Resources, Inc. | Kingwood, TX 77339 | Oil & Gas Operator | May 2025 |
| 141 | Savage Exploration, Inc. | San Marcos, TX 78666 | Oil & Gas Operator | May 2025 |
| 142 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 143 | Secondary Oil Corp., Inc. | Austin, TX 78750 | Oil Operator | Apr 1999 |
| 144 | Seeker Oil Company, Incorporated | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 145 | Shootin Star Oil, L.L.C. | Natalia, TX 78059 | Oil Operator | May 2025 |
| 146 | Source Petroleum Inc. | San Antonio, TX 78265 | Oil & Gas Operator | May 2025 |
| 147 | Spain Oil Company | Somerset, TX 78069 | Oil & Gas Operator | May 2025 |
| 148 | Spiller, J.A. | Austin, TX 78735 | Oil & Gas Operator | Jan 2016 |
| 149 | Spiller, Robert S. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1995 |
| 150 | Square One Corporation | Giddings, TX 78942 | Oil & Gas Operator | Dec 2012 |
| 151 | Starr Operating Company | Austin, TX 78759 | Oil & Gas Operator | May 2025 |
| 152 | Sto Operating Company | San Antonio, TX 78258 | Oil & Gas Operator | May 2025 |
| 153 | Tampke Service Co. | Devine, TX 78016 | Oil Operator | May 2025 |
| 154 | Tanos Production, Inc. | Houston, TX 77077 | Oil & Gas Operator | Aug 2003 |
| 155 | Texas Secondary Oil Corporation | Devine, TX 78016 | Oil & Gas Operator | May 2025 |
| 156 | Three J Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | May 2025 |
| 157 | United Petroleum Technologies | Hondo, TX 78861 | Oil & Gas Operator | Aug 2001 |
| 158 | V/J Oil Company | Yancey, TX 78886 | Oil & Gas Operator | Oct 2015 |
| 159 | Vac-U-Lift Production Co.,Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | May 2025 |
| 160 | Venus Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2002 |
| 161 | Virtex Operating Company, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2023 |
| 162 | Virtex Petroleum Company, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Jan 2008 |
| 163 | Waters Eng. & Operating, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Sep 2013 |
| 164 | Watson Energy Investments, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 165 | Weinstrom Petroleum | Devine, TX 78016 | Oil Operator | May 2025 |
| 166 | Wernette, Louis J. | Hondo, TX 78861 | Oil & Gas Operator | Sep 2023 |
| 167 | Wetzel Oil Company | Austin, TX 78738 | Oil & Gas Operator | May 2007 |
| 168 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | May 2025 |
| 169 | Winchester Oil & Gas LLC | Katy, TX 77449 | Oil Operator | May 2025 |
| 170 | Wineland Oil - LLC | Hays, KS 67601 | Oil Operator | Jan 2025 |