| 101 | Braley, William R. | Gage, OK 73843 | Oil & Gas Operator | Jul 2004 |
| 102 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 103 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 104 | Brittany Drilling Co. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2000 |
| 105 | Brooks, E. B., Jr. | Dallas, TX 75206 | Oil & Gas Operator | May 2018 |
| 106 | Browning & Terry | Archer City, TX 76351 | Oil & Gas Operator | Feb 2009 |
| 107 | Buckeye Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2018 |
| 108 | Bud Oil, Inc. | Duncan, OK 73534 | Oil & Gas Operator | Oct 2025 |
| 109 | Bull Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2025 |
| 110 | Bulldog Exploration, LP | Houston, TX 77090 | Oil & Gas Operator | Apr 2011 |
| 111 | Bullet Development, LLC | Abilene, TX 79601 | Oil & Gas Operator | Oct 2025 |
| 112 | Burger, F.W. Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 113 | Burgess, W. E. | Fort Worth, TX 76147 | Oil & Gas Operator | Oct 2025 |
| 114 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 115 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 116 | Byrne Oil Company | Lubbock, TX 79424 | Oil & Gas Operator | Oct 2025 |
| 117 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 118 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 119 | Calhoun & Ellison Oil Co. | San Antonio, TX 78248 | Oil & Gas Operator | Dec 1997 |
| 120 | Caminar Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Aug 2024 |
| 121 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 122 | Cannon Operating Company LLC | Garland, TX 75043 | Oil Operator | Oct 2025 |
| 123 | Cardinal Producing Co. | Abilene, TX 79606 | Oil & Gas Operator | Aug 2003 |
| 124 | Carl Oil & Gas Co. | Bakersfield, CA 93309 | Oil & Gas Operator | Dec 1995 |
| 125 | Carr Exploration Corp. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 126 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Oct 2025 |
| 127 | Carroll Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Feb 2022 |
| 128 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2025 |
| 129 | CDJ Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 130 | Cedar Oil Company | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 131 | Cedar Ridge Energy, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Oct 2025 |
| 132 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 133 | Central Basin Oil Inv. Inc. | Southlake, TX 76092 | Oil & Gas Operator | Oct 2025 |
| 134 | Chalmers Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 1997 |
| 135 | Chambers, R. H. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2006 |
| 136 | Chan West Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Oct 2025 |
| 137 | Chancellor, Earl Sales Co., Inc. | Sweetwater, TX 79556 | Oil & Gas Operator | Oct 2025 |
| 138 | Chestnut Mountain Energy, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 139 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 140 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Oct 2025 |
| 141 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 142 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 143 | Circle Ridge Production, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 144 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 145 | Co Energy | Benbrook, TX 76126 | Oil & Gas Operator | Oct 2025 |
| 146 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 147 | Coleman & Johnson Oil Company | Brownwood, TX 76801 | Oil & Gas Operator | Oct 2025 |
| 148 | Colo Construction Co., Inc. | Abilene, TX 79602 | Oil Operator | Apr 2004 |
| 149 | Colo Exploration Company, Inc. | Benbrook, TX 76126 | Oil & Gas Operator | Oct 2025 |
| 150 | Colt Oil & Gas Co. | Abilene, TX 79601 | Oil Operator | Apr 2004 |
| 151 | Concho Oilfield Service, Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2013 |
| 152 | Continual Oil & Gas, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Oct 2025 |
| 153 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 154 | Coral E&P, LLC | Adkins, TX 78101 | Oil & Gas Operator | Oct 2025 |
| 155 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 156 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Oct 2025 |
| 157 | Cox Engineering, LLC | Abilene, TX 79605 | Oil Operator | Mar 2006 |
| 158 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Oct 2025 |
| 159 | Crescent Exploration Company | Austin, TX 78767 | Oil & Gas Operator | Aug 1995 |
| 160 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | Oct 2025 |
| 161 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2025 |
| 162 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 163 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | Oct 2025 |
| 164 | Cwic, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Oct 2025 |
| 165 | Cwo Energy, LLC | Midland, TX 79705 | Oil Operator | Oct 2025 |
| 166 | D-Bar Leasing, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2022 |
| 167 | D. A. B. Oil Service, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2012 |
| 168 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | Oct 2025 |
| 169 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Oct 2025 |
| 170 | D.K.D. | Merkel, TX 79536 | Oil & Gas Operator | Oct 2025 |
| 171 | Daf Operating, LLC | Houston, TX 77005 | Oil & Gas Operator | Oct 2025 |
| 172 | Dakota Resources, Inc. (I) | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 173 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 174 | Dark Canyon Resources LLC | Refugio, TX 78377 | Oil Operator | Oct 2025 |
| 175 | Davis, Paul Pipe & Supply Inc. | Abilene, TX 79606 | Oil & Gas Operator | Feb 2001 |
| 176 | Deen Drilling Company | Archer City, TX 76351 | Oil & Gas Operator | Oct 2025 |
| 177 | Deep Gully Oil LLC | Houston, TX 77292 | Oil Operator | Oct 2025 |
| 178 | Del Petroleum Corporation | Dallas, TX 75219 | Oil & Gas Operator | Jan 2012 |
| 179 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 180 | Delta Oil & Gas LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 181 | Demand Energy, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jul 1999 |
| 182 | Dimock Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Oct 2025 |
| 183 | Dino Operating LLC | Throckmorton, TX 76483 | Oil Operator | Oct 2025 |
| 184 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 185 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Oct 2025 |
| 186 | DJM Beasley Well Service | Tuscola, TX 79562 | Oil Operator | Oct 2025 |
| 187 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Aug 2025 |
| 188 | Dobbs Petroleum Co. | Abilene, TX 79606 | Oil & Gas Operator | Oct 2025 |
| 189 | Domino Operations, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Oct 2025 |
| 190 | Double C Operating LLC | Abilene, TX 79602 | Oil Operator | Oct 2025 |
| 191 | Double M Petroproperties, Inc. | Haskell, TX 79521 | Oil & Gas Operator | Oct 2025 |
| 192 | Dove Creek Energy, Inc. | Fort Worth, TX 76121 | Oil & Gas Operator | Oct 2025 |
| 193 | Dove Mineral | Abilene, TX 79601 | Oil & Gas Operator | Dec 2010 |
| 194 | DP2, LLC | Southlake, TX 76092 | Oil & Gas Operator | Oct 2025 |
| 195 | Drillogix Exploration LLC | Breckenridge, TX 76424 | Oil Operator | Oct 2025 |
| 196 | Drum, Delton | Liberty, TX 77575 | Oil & Gas Operator | Jul 2005 |
| 197 | Duncan Drilling Co. | Big Spring, TX 79721 | Oil & Gas Operator | Oct 2025 |
| 198 | Dunigan Petroleum, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 199 | Dunlap Exploration, Inc. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2016 |
| 200 | Durango Operating Co., Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2002 |