| 101 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 102 | Brian Energy | Kilgore, TX 75663 | Oil & Gas Operator | May 2013 |
| 103 | Brothers Oil & Equipment, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 104 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2025 |
| 105 | Brothers Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jan 2004 |
| 106 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 107 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 108 | Brown, J. Burns Operating Co. | Havre, MT 59501 | Oil & Gas Operator | Jan 2025 |
| 109 | Buccaneer Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 110 | Buckhorn Operating LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Mar 2025 |
| 111 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 112 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |
| 113 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 114 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 115 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 116 | C & D Energy Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1994 |
| 117 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Mar 2025 |
| 118 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Dec 2024 |
| 119 | Caddo Management, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2024 |
| 120 | Calico Operating Co., Inc. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2002 |
| 121 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Mar 2025 |
| 122 | Cannon Operating Company LLC | Garland, TX 75043 | Oil Operator | Mar 2025 |
| 123 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 124 | Carbon Field Energy, L.L.C. | Kilgore, TX 75663 | Oil Operator | Apr 2019 |
| 125 | Card Operating Company, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Dec 1995 |
| 126 | Caribe Production Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 1993 |
| 127 | Carl Oil & Gas Co. | Bakersfield, CA 93309 | Oil & Gas Operator | Dec 1995 |
| 128 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 129 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2025 |
| 130 | Carter Resources | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2005 |
| 131 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 132 | Castle Production Company | Henderson, TX 75652 | Oil & Gas Operator | May 1997 |
| 133 | Cavalry Resources LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2010 |
| 134 | Cci East Texas Upstream LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2021 |
| 135 | Cci Gulf Coast Upstream LLC | Teague, TX 75860 | Oil & Gas Operator | Mar 2021 |
| 136 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Dec 2024 |
| 137 | Cex Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 138 | Chalker Energy Management II,LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 139 | Chalker Energy Management,LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2006 |
| 140 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 141 | Charger Oil & Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2014 |
| 142 | CHB Interests, LLC | Kilgore, TX 75663 | Oil Operator | Oct 2011 |
| 143 | CHB Investments | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2004 |
| 144 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 145 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2024 |
| 146 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 147 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 148 | Chinn Exploration Company | Longview, TX 75605 | Oil & Gas Operator | Nov 2015 |
| 149 | Chisos, LTD | Houston, TX 77098 | Oil & Gas Operator | Mar 2025 |
| 150 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | Mar 2025 |
| 151 | Cippele Resources Co. | Longview, TX 75608 | Oil & Gas Operator | May 1994 |
| 152 | Circle "M" Energy Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2003 |
| 153 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Mar 2025 |
| 154 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 155 | Clark, Richard E., Inc. | Longview, TX 75604 | Oil & Gas Operator | May 2001 |
| 156 | Classic Energy Incorporated | Tyler, TX 75701 | Oil & Gas Operator | Jul 2005 |
| 157 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 158 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Mar 2025 |
| 159 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 160 | CNS Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2010 |
| 161 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 162 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 163 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Nov 2024 |
| 164 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 165 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 166 | Comanche Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2006 |
| 167 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | Mar 2025 |
| 168 | Comstock Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Dec 2012 |
| 169 | Comstock Oil & Gas, LLC | Frisco, TX 75034 | Oil & Gas Operator | Mar 2025 |
| 170 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 171 | Concorde Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 172 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 173 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 174 | Conquest Energy, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2025 |
| 175 | Consolidated Natural Res. Corp. | Kilgore, TX 75662 | Oil & Gas Operator | Jan 2016 |
| 176 | Corda Corporation | Wichita Falls, TX 76302 | Oil & Gas Operator | Mar 2025 |
| 177 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 178 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 179 | Cotton Valley Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 180 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 181 | Covey Park Resources LLC | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 182 | Craton Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2005 |
| 183 | Craton Energy Holdings III, LP | Houston, TX 77002 | Oil & Gas Operator | Jul 2009 |
| 184 | Craton Operating LLC | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2025 |
| 185 | CRD Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2021 |
| 186 | Crescent Pass Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2025 |
| 187 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 188 | Crozier & Company | Tyler, TX 75703 | Oil & Gas Operator | Jan 2020 |
| 189 | Cypress Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2025 |
| 190 | Cypress Production, Inc. | Azle, TX 76020 | Oil & Gas Operator | Mar 2025 |
| 191 | D & H Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2024 |
| 192 | D-S-B Properties, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2014 |
| 193 | D-S-B Properties, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 194 | Daco Oil | Joinerville, TX 75658 | Oil & Gas Operator | Aug 2019 |
| 195 | Dale Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 196 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 197 | Dalf Energy LLC | Pampa, TX 79066 | Oil & Gas Operator | Mar 2025 |
| 198 | Dallas Petroleum Group, LLC | Dallas, TX 75379 | Oil & Gas Operator | Mar 2025 |
| 199 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 200 | Danmark Energy Services, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Apr 2021 |