| 101 | Casselman-Sheely | Emporia, KS 66801 | Oil & Gas Operator | Oct 2021 |
| 102 | Cayman Resources Corporation | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 103 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Jun 2026 |
| 104 | Central California Oil Company | Fish Camp, CA 93623 | Oil & Gas Operator | Jul 2026 |
| 105 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2026 |
| 106 | Cep Mid-Continent LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jun 2026 |
| 107 | Chermac Energy Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2020 |
| 108 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2026 |
| 109 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2026 |
| 110 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | Jul 2026 |
| 111 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Sep 2026 |
| 112 | Claborn Julia | Okmulgee, OK 74447-9781 | Oil & Gas Operator | Mar 2022 |
| 113 | Clark Operating Services Inc | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 114 | Clemishire, Mark E | | Oil Operator | Jun 2026 |
| 115 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 116 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 117 | Columbia Production Company | Edmond, OK 73083 | Oil & Gas Operator | May 2020 |
| 118 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 119 | Concorde Resources Corporation | Eufaula, OK 74432 | Oil & Gas Operator | Jan 2026 |
| 120 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 121 | Conner Family Limited Partnership | Humble, TX 77338 | Oil & Gas Operator | Apr 2026 |
| 122 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Sep 2026 |
| 123 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 124 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 125 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | May 2026 |
| 126 | Covenant Oil Corp | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 127 | Cowboy Oil & Gas | Bristow, OK 74010-0057 | Oil & Gas Operator | Jul 2018 |
| 128 | Cowden SR Lester L | Oklahoma City, OK 73118-4011 | Oil & Gas Operator | Sep 1999 |
| 129 | Cox Linda | Bristow, OK 74010-0808 | Oil & Gas Operator | Jan 2018 |
| 130 | Crew B Operating, LLC | Okmulgee, OK 74447 | Oil Operator | Jun 2026 |
| 131 | Crooch John | Okmulgee, OK 74447 | Oil Operator | Apr 2026 |
| 132 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 2026 |
| 133 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 134 | Crown Central Pet Corp | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2016 |
| 135 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 136 | Cudd Operating Corp | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2020 |
| 137 | Culbreath Oil & Gas Co Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2026 |
| 138 | Curn Lisa | Steubenville, OH 43952-2535 | Oil Operator | Jun 2026 |
| 139 | CW Investments | Okmulgee, OK 74447-4026 | Oil & Gas Operator | Nov 2025 |
| 140 | Cypress Exploration Company | Tulsa, OK 74132 | Oil & Gas Operator | Feb 2026 |
| 141 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Sep 2026 |
| 142 | D & G Operating Company, Inc. | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 143 | D & L Operating LLC | Morris, OK 74445 | Oil & Gas Operator | Jun 2026 |
| 144 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Sep 2026 |
| 145 | Darling Oil Corporation | Lamont, OK 74643 | Oil & Gas Operator | Jun 2026 |
| 146 | Davis & Davis | | Oil & Gas Operator | Dec 2021 |
| 147 | Davis & Davis Oil Properties Inc | Morris, OK 74445 | Oil Operator | Jun 2026 |
| 148 | Davis Charles K | Morris, OK 74445-2201 | Oil & Gas Operator | Apr 2015 |
| 149 | Davis Jim L | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 150 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Jun 2026 |
| 151 | Derrick Resources Inc | Henryetta, OK 74437-4249 | Oil & Gas Operator | Jun 2026 |
| 152 | Dexxon Inc | Kiefer, OK 74041 | Oil & Gas Operator | Jun 2026 |
| 153 | Diamond Energy Partners LLC | Collinsville, OK 74021 | Oil & Gas Operator | Jun 2026 |
| 154 | Dillingham Ranch LC | Tulsa, OK 74152 | Oil & Gas Operator | May 2013 |
| 155 | Dixon David | Okmulgee, OK 74447-2066 | Oil & Gas Operator | Jun 2026 |
| 156 | Dixon J C | Okmulgee, OK 74447-8522 | Oil & Gas Operator | Mar 2026 |
| 157 | Dobson Oil Operators Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2004 |
| 158 | Doneghy James | Wellington, TX 79095 | Oil & Gas Operator | May 2013 |
| 159 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Jul 2026 |
| 160 | Drillex Consulting Corp | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2026 |
| 161 | Drumright Well Service Inc | Oilton, OK 74052 | Oil & Gas Operator | Jul 2026 |
| 162 | Dual Operating & Production Co | Tulsa, OK 74145-7831 | Oil & Gas Operator | Apr 2020 |
| 163 | Duncan Ronald R | Okemah, OK 74859-9603 | Oil & Gas Operator | Aug 2023 |
| 164 | Dunlap Drilling And Producing, Inc | Glenpool, OK 74033-4206 | Oil & Gas Operator | Jun 2026 |
| 165 | Dunne Equities, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2014 |
| 166 | Durossette Floyd R | Warner, OK 74469-0548 | Oil & Gas Operator | Apr 2011 |
| 167 | Durossette Jr Jess | Haskell, OK 74436 | Oil Operator | Mar 2007 |
| 168 | Dyer Dale E Dba The Loving Company | Tulsa, OK 74107 | Oil & Gas Operator | Jul 2026 |
| 169 | Dyne Exploration Company | Plano, TX 75093-6512 | Oil & Gas Operator | Apr 2020 |
| 170 | Dyno Energy LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2026 |
| 171 | Ea Petroleum Inc | Norman, OK 73072-4147 | Oil & Gas Operator | May 2006 |
| 172 | Eagle Operating Company | Tulsa, OK 74146-5730 | Oil & Gas Operator | Aug 2020 |
| 173 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | Jun 2026 |
| 174 | Earnest Russel | Okmulgee, OK 74447-1216 | Oil & Gas Operator | Jan 2007 |
| 175 | Eastok Energy Partners LLC | Edmond, OK 73013-1044 | Oil & Gas Operator | Jun 2026 |
| 176 | Edinger Engineering, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2026 |
| 177 | Edwards & Leach Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2005 |
| 178 | Edwards Oil & Gas Company | Oklahoma City, OK 73156-0386 | Oil & Gas Operator | Mar 2015 |
| 179 | Ekg Operating Inc | Seminole, OK 74818-1028 | Oil & Gas Operator | Nov 2015 |
| 180 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Dec 2025 |
| 181 | Ellard I W | Bixby, OK 74008-0220 | Oil & Gas Operator | Jan 2007 |
| 182 | Ellis Rolland | Henryetta, OK 74437-0536 | Oil & Gas Operator | Sep 2018 |
| 183 | Elvera Stiles Trust | Broken Arrow, OK 74011 | Oil & Gas Operator | Feb 2026 |
| 184 | Emo Inc | Eufaula, OK 74432-0841 | Oil & Gas Operator | Apr 2020 |
| 185 | Endeavor Drilling, Inc. | Wagoner, OK 74467 | Oil Operator | Jun 2026 |
| 186 | Enerfin Gathering-East LLC | Houston, TX 77077 | Oil & Gas Operator | Nov 2022 |
| 187 | Enerfin Resources I Limited Partnership | Houston, TX 77077-2386 | Oil & Gas Operator | Apr 2023 |
| 188 | Energy Lease Service Inc | Drumright, OK 74030-7403 | Oil & Gas Operator | Jun 2026 |
| 189 | Energy Production Services LLC | Oklahoma City, OK 73162-4736 | Oil & Gas Operator | Apr 2020 |
| 190 | Energy Three Inc. | Jackson, MS 39211 | Oil & Gas Operator | May 2026 |
| 191 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Jun 2026 |
| 192 | Energyquest Management, LLC | Houston, TX 77090 | Oil & Gas Operator | Apr 2021 |
| 193 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 194 | Enhanced Hydrocarbons Inc | Claremore, OK 74017 | Oil & Gas Operator | May 2013 |
| 195 | Ensight Energy Group Inc | Richardson, TX 75080-2370 | Oil & Gas Operator | Jun 2026 |
| 196 | Enterprise Energy Exploration Inc | Tulsa, OK 74133-6724 | Oil & Gas Operator | Jul 2026 |
| 197 | Enterprising Enterprises Inc | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 198 | Eott Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 1995 |
| 199 | Eskridge Production Company | Tulsa, OK 74112-1428 | Oil Operator | Sep 2019 |
| 200 | Ewsc Inc | Kenosha, WI 53142-3775 | Oil & Gas Operator | Apr 2020 |