| 101 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 102 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2025 |
| 103 | Brewer J E | Seminole, OK 74818-0863 | Oil & Gas Operator | Mar 2014 |
| 104 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 105 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 106 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 107 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Mar 2025 |
| 108 | Bridger Petroleum Corp | | Oil & Gas Operator | Oct 1999 |
| 109 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 110 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 111 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 112 | Bromar Oil Company | Fairview, OK 73737-0006 | Oil & Gas Operator | Apr 2014 |
| 113 | Brookwood Oil Company | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2002 |
| 114 | Brower, Robert C. | Fort Worth, TX 76116 | Oil & Gas Operator | May 2025 |
| 115 | Brown Jeff J Dba Brown Service Co | Enid, OK 73701 | Oil & Gas Operator | Mar 2025 |
| 116 | Bryant D G And Company | Midlothian, TX 76065-3628 | Oil & Gas Operator | Jun 2024 |
| 117 | Bta Energy LLC | Kinta, OK 74552-3132 | Gas Operator | Feb 2025 |
| 118 | Burlington Res Oil & Gas LP | Houston, TX 77079 | Oil & Gas Operator | Jan 2025 |
| 119 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 120 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 121 | Byng Operating LLC | Ada, OK 74820-0677 | Oil & Gas Operator | Mar 2025 |
| 122 | C & A Oil Company | Edmond, OK 73013-9413 | Oil & Gas Operator | Mar 2015 |
| 123 | C & B Oil Company | Drumright, OK 74030 | Oil & Gas Operator | Mar 2025 |
| 124 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 125 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 126 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 127 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 128 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 129 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2025 |
| 130 | Canyon Creek Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 131 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Feb 2025 |
| 132 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 133 | Capstone Oil & Gas LLC | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 134 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742 | Oil Operator | Dec 2019 |
| 135 | Carl Humphries Inc | Piedmont, OK 73078-0514 | Oil & Gas Operator | Mar 2025 |
| 136 | Carlton, Richard L | | Oil & Gas Operator | Aug 1999 |
| 137 | Carmen Field LP | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2008 |
| 138 | Carrera Energy LLC | Midland, TX 79704-5036 | Oil & Gas Operator | Jan 2025 |
| 139 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Mar 2025 |
| 140 | Casselman Charles Jack | Okmulgee, OK 74447-4265 | Oil & Gas Operator | Apr 2020 |
| 141 | Cayman Exploration Corp. | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 142 | CDS Oil Company | Tulsa, OK 74147-1514 | Oil & Gas Operator | Mar 2015 |
| 143 | Centaur Resources Inc | Oklahoma City, OK 73142-6804 | Oil & Gas Operator | Feb 2025 |
| 144 | Cep Mid-Continent LLC | Skiatook, OK 74070 | Oil & Gas Operator | Feb 2025 |
| 145 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Mar 2025 |
| 146 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Mar 2025 |
| 147 | Chapman Elise P Estate | | Oil & Gas Operator | Mar 2020 |
| 148 | Chapman Energy Oklahoma, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 149 | Chapman Resources Corporation | Dallas, TX 75231 | Oil & Gas Operator | May 1999 |
| 150 | Cherry, William H., Inc. | Oklahoma City, OK 73125 | Oil & Gas Operator | Mar 2015 |
| 151 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2025 |
| 152 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 153 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 154 | Chica Oil Company | Lago VIsta, TX 78645-6561 | Oil & Gas Operator | Mar 2001 |
| 155 | Chisholm Oil And Gas Operating LLC | Tulsa, OK 74103-3522 | Oil & Gas Operator | Feb 2025 |
| 156 | Chisholm Trail Resources, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2002 |
| 157 | Choate Kenny Dba Rebound Oil Co | Helena, OK 73741-0543 | Gas Operator | Mar 2025 |
| 158 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 159 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 160 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 161 | Cimarron Production Co Inc | Oklahoma City, OK 73142-3017 | Oil & Gas Operator | Feb 2025 |
| 162 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 163 | Citizen Energy III LLC | Devner, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 164 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 165 | CLC Operations Inc | Midland, TX 79701 | Oil & Gas Operator | Mar 1997 |
| 166 | Cleary Exploration LLC | Oklahoma City, OK 73112-7221 | Oil & Gas Operator | Oct 2014 |
| 167 | Clifford Resources Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2015 |
| 168 | Clifton & Associates Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2020 |
| 169 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2025 |
| 170 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 171 | Comanche Exploration Co LLC | Oklahoma City, OK 73116-7334 | Oil & Gas Operator | Mar 2025 |
| 172 | Comanche Exploration Company | Oklahoma City, OK 73120-2797 | Oil & Gas Operator | Feb 2007 |
| 173 | Comanche Petroleum Corporation | Norman, OK 73072 | Oil & Gas Operator | Apr 2024 |
| 174 | Comanche Production Co | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 175 | Comanche Resources Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 176 | Combined Resources Corporation | Edmond, OK 73083 | Oil & Gas Operator | May 2025 |
| 177 | Comet Oil Company | Velma, OK 73091 | Oil & Gas Operator | May 2005 |
| 178 | Compass Drilling Inc | Enid, OK 73702-5467 | Oil & Gas Operator | Sep 2014 |
| 179 | Compass Resources | Enid, OK 73702 | Oil & Gas Operator | Dec 2007 |
| 180 | Complete Energy Services LLC | Gainesville, TX 76240 | Oil Operator | Aug 2022 |
| 181 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 182 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 183 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 184 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 185 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 186 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | May 2025 |
| 187 | Continental Gas Inc | Enid, OK 73702-5103 | Oil & Gas Operator | Apr 2012 |
| 188 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 189 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2025 |
| 190 | Cooper Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2025 |
| 191 | Coppock Herb Energy | Fairview, OK 73737-1037 | Oil & Gas Operator | May 2018 |
| 192 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 193 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 194 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 195 | Cory, Kenneth W. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2012 |
| 196 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 197 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 198 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 199 | Cox Edwin L & R Berry | Dallas, TX 75202 | Oil & Gas Operator | Apr 2015 |
| 200 | Cox Gas Corporation | Dallas, TX 75201-7306 | Oil & Gas Operator | Apr 2015 |