| 101 | Flag Energy, LLC | Centerton, AR 72719 | Oil & Gas Operator | Nov 2018 |
| 102 | Flint Oil & Gas | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2003 |
| 103 | Formation Recovery LLC | Weatherford, TX 76087 | Oil & Gas Operator | Apr 2026 |
| 104 | Fortuna Exploration, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2026 |
| 105 | Fortune Production Co. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2008 |
| 106 | Fossil Operating, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Apr 2026 |
| 107 | Front Street Operating, LLC | Sourlake, TX 77659 | Oil & Gas Operator | Apr 2026 |
| 108 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 109 | Gas Corporation Of America | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 110 | Geonatural Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Apr 2026 |
| 111 | Geosurveys, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 112 | Golden Specialties Oil & Gas | Midland, TX 79708 | Oil & Gas Operator | Apr 2026 |
| 113 | Great Western Drilling Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 114 | Green Oil & Gas, Inc. | Winters, TX 79567 | Oil & Gas Operator | Aug 2003 |
| 115 | Guffey, Roy, Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Aug 2011 |
| 116 | Guffey, WM. R. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2015 |
| 117 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 118 | H-M Resource Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Feb 2023 |
| 119 | Halvey Energy Co. | Midland, TX 79702 | Oil & Gas Operator | Oct 2004 |
| 120 | Halvey Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 121 | Hane Operating, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2005 |
| 122 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 123 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Apr 2026 |
| 124 | Hellifino Operating, LLC | San Antonio, TX 78212 | Oil Operator | Apr 2026 |
| 125 | Henderson Natural Res, L.L.C. | Crozet, VA 22932 | Oil & Gas Operator | Apr 2026 |
| 126 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 127 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2026 |
| 128 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Apr 2026 |
| 129 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 130 | Hickox Oil Texas Company, Inc. | Mobile, AL 36689 | Oil & Gas Operator | Feb 1996 |
| 131 | Hobbs Energy Corporation | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 132 | Holden Oil & Gas | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 133 | Horizon Exploration Services | El Paso, TX 79922 | Oil Operator | Apr 2026 |
| 134 | Horizon Well Services, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 135 | HW Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2026 |
| 136 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Apr 2026 |
| 137 | J & J Services Company | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2026 |
| 138 | J L B Operating Co. | Midland, TX 79701 | Oil & Gas Operator | Aug 2000 |
| 139 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Apr 2026 |
| 140 | J.H. Oil, Inc. (A) | Tuscola, TX 79562 | Oil & Gas Operator | Dec 2004 |
| 141 | Jasper Energy, Incorporated | Decatur, TX 76234 | Oil Operator | Apr 2026 |
| 142 | Johnson Royalties, Inc. | Austin, TX 78729 | Oil & Gas Operator | Jul 2002 |
| 143 | Josey, Lenoir M., Inc. | Houston, TX 77019 | Oil & Gas Operator | Aug 2003 |
| 144 | King-Goen Oil, LLC | Abilene, TX 79602 | Oil Operator | Apr 2026 |
| 145 | Kingery, Johnny | Clyde, TX 79510 | Oil & Gas Operator | Oct 1997 |
| 146 | Kinlaw Oil Corporation | Dallas, TX 75380 | Oil & Gas Operator | Apr 2026 |
| 147 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 148 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 149 | Lacy, R., Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2002 |
| 150 | Lavanco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2006 |
| 151 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2026 |
| 152 | Leclair Operating, L.L.C. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2026 |
| 153 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 154 | Leeper Oil Exp. & Prod. Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2005 |
| 155 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 156 | London Petroleum Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 157 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 158 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 159 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 160 | Lynx Oil Co., Inc. | Denton, TX 76207 | Oil & Gas Operator | Sep 2003 |
| 161 | Marata Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 162 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |
| 163 | Marianas Operating Co. | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 164 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 165 | Martin Matrix Inc. | San Angelo, TX 76905 | Oil & Gas Operator | Apr 2026 |
| 166 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 167 | McCammon Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2026 |
| 168 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 169 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | Apr 2026 |
| 170 | Mesquite Oil & Gas Production | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2026 |
| 171 | MGM Oil & Gas Inc. | Ballinger, TX 76821 | Oil & Gas Operator | Apr 2026 |
| 172 | Miller, Bob I. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 173 | Mission River Systems, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Apr 2026 |
| 174 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2026 |
| 175 | Morrow Resources, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2004 |
| 176 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 177 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 178 | Natural Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 1997 |
| 179 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2026 |
| 180 | Newton Corp.,The | Dallas, TX 75251 | Oil & Gas Operator | Apr 2026 |
| 181 | Nichols,Edwin S Explorations Inc | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 182 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 183 | Norman Oil Corporation | Abilene, TX 79608 | Oil & Gas Operator | Mar 2000 |
| 184 | North American Exploration Co. | Abilene, TX 79602 | Oil & Gas Operator | Apr 1998 |
| 185 | North Central Casing Pullers,Inc | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 186 | North Central Oil Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 187 | Nosivad Oil, Inc. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2026 |
| 188 | Novo Exploration Corporation | Hurst, TX 76053 | Oil & Gas Operator | Jun 2020 |
| 189 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 190 | O'Blue Corp. | Kerrville, TX 78028 | Oil & Gas Operator | Mar 1998 |
| 191 | O'Dell, Mitchell | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2026 |
| 192 | Omni Petroleum Corporation | Austin, TX 78738 | Oil & Gas Operator | Apr 2026 |
| 193 | Osborn Heirs Co | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 194 | Otex LLC | Santa Anna, TX 76878 | Oil & Gas Operator | Apr 2026 |
| 195 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Apr 2026 |
| 196 | P,B&B Operating Inc. | Coleman, TX 76834 | Oil & Gas Operator | Apr 2026 |
| 197 | Paint Rock Operating, LLC | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2026 |
| 198 | Patton Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 199 | Pentergy Operating, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Apr 2026 |
| 200 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |