| 101 | Brown & Brown Production Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Feb 2025 |
| 102 | Brown L C Company | Ada, OK 74820-7916 | Oil & Gas Operator | Nov 2021 |
| 103 | Bud Oil, Inc. | Duncan, OK 73534 | Oil & Gas Operator | Jun 2025 |
| 104 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 105 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 106 | Burns Eugene | Davis, OK 73030-3112 | Oil Operator | Mar 2006 |
| 107 | Busey Naman | Elmore City, OK 73433-9583 | Oil & Gas Operator | Dec 2024 |
| 108 | Butkin Oil Company | Duncan, OK 73534-2090 | Oil & Gas Operator | Sep 2021 |
| 109 | Butkin Oil Company LLC | Duncan, OK 73533 | Oil & Gas Operator | Mar 2023 |
| 110 | Butte Oil And Gas Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 2025 |
| 111 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 112 | BVD Inc | Yates Center, KS 66783-0194 | Oil & Gas Operator | Mar 2025 |
| 113 | Byng Operating LLC | Ada, OK 74820-0677 | Oil & Gas Operator | Mar 2025 |
| 114 | C & D Drilling Company | Hennepin, OK 73046 | Oil & Gas Operator | Mar 2007 |
| 115 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 116 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Mar 2025 |
| 117 | C & W Operating LLC | Tulsa, OK 74145-7627 | Oil Operator | May 2020 |
| 118 | C & Y Casing Pulling Company | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 119 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 120 | C E Harmon Oil Inc | Tulsa, OK 74136-6559 | Oil & Gas Operator | Mar 2025 |
| 121 | C F & L Producing Co | | Oil & Gas Operator | Sep 2000 |
| 122 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 123 | Callie Oil Company LLC | Perry, OK 73077 | Oil & Gas Operator | Feb 2025 |
| 124 | Calpine Natural Gas Company L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 125 | Camino Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 126 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 127 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2025 |
| 128 | Capital Pet & Investments Inc | Oklahoma City, OK 73102-7400 | Oil & Gas Operator | Mar 2015 |
| 129 | Capitol Well Servicing Co., Inc. | Oklahoma City, OK 73143 | Oil & Gas Operator | May 2023 |
| 130 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 131 | Caprock, Inc. | Ralls, TX 79357 | Oil & Gas Operator | Mar 2013 |
| 132 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 133 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 134 | Carman Frances J | Pawhuska, OK 74056-0101 | Oil & Gas Operator | Aug 2013 |
| 135 | Casa Grande Exploration Company | Casa Grande, AZ 85194 | Oil & Gas Operator | Jan 2025 |
| 136 | Casillas Operating LLC | Tulsa, OK 74103-4060 | Oil & Gas Operator | Mar 2025 |
| 137 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Mar 2025 |
| 138 | Cates Betty J | Tulsa, OK 74112 | Oil & Gas Operator | Nov 2016 |
| 139 | Caulkins Oil Company | Aztec, NM 87410 | Oil & Gas Operator | Oct 2024 |
| 140 | CDS Oil Company | Tulsa, OK 74147-1514 | Oil & Gas Operator | Mar 2015 |
| 141 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Apr 2025 |
| 142 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Mar 2025 |
| 143 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Mar 2025 |
| 144 | Chapman Energy Oklahoma, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 145 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2025 |
| 146 | Cherokee Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 147 | Cherokee Royalties & Minerals Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 148 | Chesapeake Exploration LLC | Oklahoma City, OK 731540496 | Oil & Gas Operator | Jul 2020 |
| 149 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 150 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Jun 2025 |
| 151 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2025 |
| 152 | Chisum G H | Duncan, OK 73533 | Oil & Gas Operator | Dec 2010 |
| 153 | Chris Oil Co | Cambridge, OH 43725 | Oil & Gas Operator | Nov 2008 |
| 154 | Christie Jr C B | Wichita Falls, TX 76308-4873 | Oil & Gas Operator | May 2024 |
| 155 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Jun 2025 |
| 156 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Jun 2025 |
| 157 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 158 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 159 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Jun 2025 |
| 160 | Citizen Energy II LLC | Tulsa, OK 74103-3729 | Oil & Gas Operator | Feb 2025 |
| 161 | Citizen Energy III LLC | Devner, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 162 | Click Robert R | Dallas, TX 75231 | Oil & Gas Operator | Nov 1995 |
| 163 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 164 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 165 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 166 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 167 | Coastal States Gas Prod. Co. | | Oil & Gas Operator | Jun 1996 |
| 168 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2025 |
| 169 | Coho Oil & Gas Inc | Coppell, TX 75019-8288 | Oil & Gas Operator | Mar 2015 |
| 170 | Colonial Energy Company Inc | Garland, TN 75045 | Oil & Gas Operator | Apr 2015 |
| 171 | Columbia Production Company | Edmond, OK 73083 | Oil & Gas Operator | May 2020 |
| 172 | Combined Resources Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jun 2025 |
| 173 | Command Energy Operating LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2025 |
| 174 | Compadre Drilling & Expl Corp | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2015 |
| 175 | Complete Energy Services LLC | Gainesville, TX 76240 | Oil Operator | Aug 2022 |
| 176 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 177 | Concord Energy, Inc. | Glen Rose, TX 76043 | Oil & Gas Operator | Jun 2025 |
| 178 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 179 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 180 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 181 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Jun 2025 |
| 182 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 183 | Cook Oil Company | Wewoka, OK 74884 | Oil & Gas Operator | Sep 2015 |
| 184 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Feb 2025 |
| 185 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 186 | Cornell Glen R | Pauls Valley, OK 73075-9606 | Oil & Gas Operator | Oct 2013 |
| 187 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 188 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 189 | Couch Donald W | Marlow, OK 73055 | Oil & Gas Operator | Mar 2025 |
| 190 | Cox Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 191 | CPRP Services LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Feb 2025 |
| 192 | Craig Elder Oil And Gas LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 193 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 194 | Crescent Exploration, LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 195 | Creslenn Oil Company | | Oil & Gas Operator | Nov 1998 |
| 196 | Crown Energy Company | Oklahoma City, OK 73106 | Oil & Gas Operator | Feb 2025 |
| 197 | Crown Petroleum Company | Duncan, OK 73534-0938 | Oil & Gas Operator | Jan 2011 |
| 198 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 199 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 200 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |