| 101 | Jones, John E. | Friendswood, TX 77546 | Oil Operator | May 2016 |
| 102 | K.A. Barnes Oil & Gas Oper, LLC | Somerset, TX 78069 | Oil Operator | May 2025 |
| 103 | K2 Petroleum, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | May 2025 |
| 104 | Kaye Poth Oil Corp. | Seguin, TX 78155 | Oil & Gas Operator | May 1998 |
| 105 | Kidd Production Co. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 106 | Klaeger Operating Company II,LLC | Marble Falls, TX 78654 | Oil Operator | May 2025 |
| 107 | Klaeger, J. H. | Hondo, TX 78861 | Oil & Gas Operator | Dec 2009 |
| 108 | Koko Skadi, LLC | Austin, TX 78731 | Oil & Gas Operator | May 2025 |
| 109 | Landor Oil Co. | San Marcos, TX 78666 | Oil Operator | May 2025 |
| 110 | Libom Oil Company | Elmsford, NY 10523 | Oil & Gas Operator | Aug 2003 |
| 111 | Lightning Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 112 | Lone Star Operating Company | Pearsall, TX 78061 | Oil & Gas Operator | May 2025 |
| 113 | Longshot Energy LLC | League City, TX 77573 | Oil Operator | May 2025 |
| 114 | Lott Production Company | San Antonio, TX 78217 | Oil & Gas Operator | May 2025 |
| 115 | Lucros International Corporation | Van Buren, AR 72956 | Oil & Gas Operator | May 2025 |
| 116 | Lynch, W. Waldo | Uvalde, TX 78801 | Oil & Gas Operator | Jan 1996 |
| 117 | Magnum Oilfield Services LLC | Bakersfield, CA 93309 | Oil Operator | May 2025 |
| 118 | Mallory, Meredith, Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2002 |
| 119 | Mandujano, Alfonso & Olga | Von Ormy, TX 78073 | Oil & Gas Operator | Dec 2014 |
| 120 | Mandujano, Alfonso, Jr. | Von Ormy, TX 78073 | Oil Operator | May 2025 |
| 121 | Mark IV Energy | San Antonio, TX 78213 | Oil & Gas Operator | Apr 1993 |
| 122 | McOsker Bros., Inc. | San Antonio, TX 78264 | Oil & Gas Operator | Aug 2003 |
| 123 | MDF Oil Company | Floresville, TX 78114 | Oil Operator | May 2025 |
| 124 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 125 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Feb 2025 |
| 126 | Mims, William S. | Pleasanton, TX 78064 | Oil Operator | Jun 2009 |
| 127 | Miranda Energy Corporation | Midland, TX 79705 | Oil & Gas Operator | Jun 2016 |
| 128 | Mobile Production Systems, Inc. | Austin, TX 78711 | Oil & Gas Operator | Feb 1995 |
| 129 | Mojave Resources, LLC | New Braunfels, TX 78132 | Oil Operator | May 2025 |
| 130 | More Texas Oil | Von Ormy, TX 78073 | Oil & Gas Operator | May 2025 |
| 131 | MPG Petroleum | San Antonio, TX 78217 | Oil & Gas Operator | Aug 2003 |
| 132 | MPG Petroleum, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 133 | Mr Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 2004 |
| 134 | Nails Operating Company LLC | Hondo, TX 78861 | Oil Operator | May 2025 |
| 135 | New Beginning | Seguin, TX 78156 | Oil Operator | Jun 2016 |
| 136 | Niedorf, Patrick Stephen | San Antonio, TX 78239 | Oil Operator | Jul 2001 |
| 137 | Oilex Int'L Investments, Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 138 | Oklahoma RB Operating Company | Midland, TX 79701 | Oil & Gas Operator | Jan 1998 |
| 139 | Old Chief Oil, LLC | New Braunfels, TX 78132 | Oil Operator | May 2025 |
| 140 | Omni E & P, Inc. | San Antonio, TX 78229 | Oil Operator | Apr 2010 |
| 141 | Omni Oil & Gas, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Oct 2017 |
| 142 | Overstreet, Jamie L | Hondo, TX 78861 | Oil & Gas Operator | May 2025 |
| 143 | P.S.N. Petroleum, Inc. | San Antonio, TX 78233 | Oil & Gas Operator | May 2025 |
| 144 | Paisano Production, Inc. | Somerset, TX 78069 | Oil Operator | May 2025 |
| 145 | Palmigo Oil Co. | West Hills, CA 91308 | Oil & Gas Operator | Oct 2017 |
| 146 | Park Avenue Resources, Inc. | San Antonio, TX 78212 | Oil Operator | May 2025 |
| 147 | Partin, Charles | Atascosa, TX 78002 | Oil & Gas Operator | Aug 2005 |
| 148 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | May 2025 |
| 149 | Petro Lions, LLC | Somerset, TX 78069 | Oil Operator | May 2025 |
| 150 | Petro-Tex Energy & Expl.Co.,Inc. | Llano, TX 78643 | Oil & Gas Operator | May 2025 |
| 151 | Petrosaurus, Inc. | Somerset, TX 78069 | Oil Operator | May 2025 |
| 152 | Phoenix Oil & Gas, Inc. (A) | Canada, 00100 | Oil & Gas Operator | Oct 2005 |
| 153 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 154 | Premier Minerals, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 155 | Production Resources, Inc. | Castroville, TX 78009 | Oil & Gas Operator | May 2025 |
| 156 | Progas Properties, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | May 2025 |
| 157 | Pronto Services | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 158 | Prospectors LTD., The | Somerset, TX 78069 | Oil & Gas Operator | Jun 2002 |
| 159 | Quest Research & Dev. Corp. | Weatherford, TX 76086 | Oil & Gas Operator | May 2025 |
| 160 | Quintanilla, Tony C. | Atascosa, TX 78002 | Oil & Gas Operator | May 2025 |
| 161 | R & A Moore, Inc. | Cleburne, TX 76033 | Oil & Gas Operator | May 2025 |
| 162 | R.D. Oil Company | Austin, TX 78755 | Oil & Gas Operator | May 2025 |
| 163 | Rainer Energy, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | May 2025 |
| 164 | Ralyn Corp. | Pleasanton, TX 78064 | Oil & Gas Operator | May 2025 |
| 165 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 166 | Raol Company, The | Natalia, TX 78059 | Oil & Gas Operator | May 2025 |
| 167 | Rec Well Service, Inc. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2008 |
| 168 | Red Chalk Resources LLC | Houston, TX 77218 | Oil Operator | May 2025 |
| 169 | Regency Energy, Inc. | Crystal City, TX 78839 | Oil & Gas Operator | May 2025 |
| 170 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | May 2025 |
| 171 | Ria Mia Corporation | San Antonio, TX 78230 | Oil & Gas Operator | Apr 2011 |
| 172 | Richardson Oil Company | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2003 |
| 173 | Rickaway Energy, Corp. | Pleasanton, TX 78064 | Oil & Gas Operator | May 2025 |
| 174 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 175 | Rlu Operating, LLC | Devine, TX 78016 | Oil & Gas Operator | May 2025 |
| 176 | Roemer, David E. | Somerset, TX 78069 | Oil Operator | May 2025 |
| 177 | Royal Seahorse Developments Inc | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1994 |
| 178 | RPG Operating LLC | MC Queeney, TX 78123 | Oil Operator | May 2025 |
| 179 | Runion Oil, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 2003 |
| 180 | Rushing Oil Co. | San Antonio, TX 78213 | Oil & Gas Operator | May 2025 |
| 181 | S & L Oil Field Services | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Jan 1999 |
| 182 | Salas-Apache Oil LLC | San Antonio, TX 78227 | Oil Operator | May 2025 |
| 183 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 184 | Seeker Oil Company II, Inc. | San Antonio, TX 78209 | Oil Operator | Jan 2016 |
| 185 | Seeker Oil Company, Incorporated | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 186 | Seismotech Energy, Incorporated | Plano, TX 75075 | Oil & Gas Operator | Aug 2003 |
| 187 | Short Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2025 |
| 188 | Simco Oil, LLC | Lytle, TX 78052 | Oil Operator | May 2025 |
| 189 | Sinclair Energy Corporation | Fort Worth, TX 76177 | Oil & Gas Operator | May 2025 |
| 190 | Somerset Oil & Gas Company | Portland, TX 78374 | Oil & Gas Operator | Dec 2006 |
| 191 | Sorto, Peters God | Somerset, TX 78069 | Oil Operator | May 2025 |
| 192 | South Loop Operating, L.C. | San Antonio, TX 78279 | Oil & Gas Operator | Apr 2009 |
| 193 | South Sam Operating Company, LLC | Lakehills, TX 78063 | Oil Operator | May 2025 |
| 194 | Southwest Loop 1604, LTD. | San Antonio, TX 78209 | Oil Operator | Sep 2022 |
| 195 | Spain Oil Company | Somerset, TX 78069 | Oil & Gas Operator | May 2025 |
| 196 | Spiller, Robert S. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1995 |
| 197 | Starr Operating Company | Austin, TX 78759 | Oil & Gas Operator | May 2025 |
| 198 | Sterling Inv. Group & Assc., Inc | Baytown, TX 77522 | Oil & Gas Operator | May 2025 |
| 199 | Stone, M. L. | Kerrville, TX 78029 | Oil & Gas Operator | Aug 2003 |
| 200 | Success Oil Company, Inc. | Beverly Hills, CA 90211 | Oil & Gas Operator | May 2025 |