| 101 | CB Oil Company | Drumright, OK 74030 | Oil & Gas Operator | Jan 2025 |
| 102 | Cei Petroleum Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Jul 2016 |
| 103 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2025 |
| 104 | Cewell Energy LLC | Sugar Land, TX 77479 | Oil & Gas Operator | Jul 2024 |
| 105 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 106 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2025 |
| 107 | Chesapeake Energy MKT Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2022 |
| 108 | Chesapeake Exploration LLC | Oklahoma City, OK 731540496 | Oil & Gas Operator | Jul 2020 |
| 109 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 110 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 111 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2025 |
| 112 | Chisos Exploration Inc | Enid, OK 73703 | Oil & Gas Operator | Dec 2004 |
| 113 | Choctaw Gas Company | Quinton, OK 74561 | Gas Operator | Jan 2025 |
| 114 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 115 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 116 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 117 | Cities Services Company | | Oil & Gas Operator | Mar 2008 |
| 118 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 119 | Cleveland Rod & Tracy | Elmore City, OK 73433-9467 | Oil & Gas Operator | Jul 2023 |
| 120 | Clinton Public Works Authority | Clinton, OK 73601 | Oil & Gas Operator | May 2023 |
| 121 | CM Exploration Company Inc. | | Oil & Gas Operator | Apr 2009 |
| 122 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 123 | Cola Resources LLC | Houston, TX 77019-5639 | Gas Operator | Nov 2015 |
| 124 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 125 | Concorde Resources Corporation | Eufaula, OK 74432 | Oil & Gas Operator | Feb 2025 |
| 126 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 127 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 128 | Continental Gas Inc | Enid, OK 73702-5103 | Oil & Gas Operator | Apr 2012 |
| 129 | Continental Natural Gas, Inc. | Tulsa, OK 74121 | Oil & Gas Operator | Jun 2018 |
| 130 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 131 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2025 |
| 132 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 133 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 134 | Corterra Energy Operating LLC | Tulsa, OK 74119-4844 | Oil & Gas Operator | Aug 2021 |
| 135 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 136 | County Line Stripper Wells LLC | Chelsea, OK 74016 | Oil & Gas Operator | Dec 2024 |
| 137 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 138 | Cox Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 139 | Crane Newton T | | Oil & Gas Operator | Feb 2013 |
| 140 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 141 | Cricket Petroleum | Tulsa, OK 74146 | Oil & Gas Operator | Dec 2016 |
| 142 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 143 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 144 | Crow Creek Operating Co III LLC | Tulsa, OK 74137-8432 | Oil & Gas Operator | Apr 2015 |
| 145 | Crude Marketing & Trans Inc | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2017 |
| 146 | Cyanostar Energy, Inc | Tulsa, OK 74103-4122 | Oil & Gas Operator | Sep 2001 |
| 147 | D-Pex Operating Company | | Oil & Gas Operator | Sep 2004 |
| 148 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Apr 2025 |
| 149 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2025 |
| 150 | Daniel Resource Dev Inc | Tomball, TX 77375-8919 | Oil & Gas Operator | Oct 2009 |
| 151 | Daniel-Price Exploration Co | Tulsa, OK 74119 | Gas Operator | Apr 2011 |
| 152 | Davis Charles K | Morris, OK 74445-2201 | Oil & Gas Operator | Apr 2015 |
| 153 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | Apr 2025 |
| 154 | Davis, Joe D. | Fort Smith, AR 72903 | Gas Operator | Mar 2015 |
| 155 | Deep Rock LLC | Tulsa, OK 74137-1612 | Gas Operator | Jun 2022 |
| 156 | Deisenroth Gas Products Inc | Tulsa, OK 74104 | Oil & Gas Operator | Aug 2022 |
| 157 | Deisenroth M Craig | Tulsa, OK 74104-6511 | Oil & Gas Operator | Nov 2024 |
| 158 | Derrick Resources Inc. | Henryetta, OK 74437-4249 | Oil & Gas Operator | Jan 2025 |
| 159 | Dette Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Oct 2015 |
| 160 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 161 | Devon Energy Operating Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2013 |
| 162 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 163 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 164 | Dexxon, Inc. | Kiefer, OK 74041 | Oil & Gas Operator | Jan 2025 |
| 165 | Diamond A Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2001 |
| 166 | DLKB Operating LLC | Eufaula, OK 74432 | Gas Operator | Jan 2025 |
| 167 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Jan 2025 |
| 168 | Dominion Exp Midcontinent Inc | Oklahoma City, OK 73134-2616 | Oil & Gas Operator | Oct 2024 |
| 169 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 170 | Donovan Joe D Or L P McElwaine | Tulsa, OK 74119 | Gas Operator | Jan 2014 |
| 171 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 172 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 173 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Feb 2025 |
| 174 | Duck Bros Dozer & Trucking Inc | Konawa, OK 74849 | Oil & Gas Operator | Feb 2025 |
| 175 | Duck Oil Company LLC | Konawa, OK 74849 | Oil Operator | Jan 2025 |
| 176 | Duncan Jr J Walter | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2016 |
| 177 | Dune Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 1993 |
| 178 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 179 | Dyne Exploration Company | Plano, TX 75093-6512 | Oil & Gas Operator | Apr 2020 |
| 180 | E2 Operating LLC | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2025 |
| 181 | Eagle Energy PTR I LP | Houston, TX 77064 | Oil & Gas Operator | Feb 2015 |
| 182 | Eagle Gas Marketing Co | Oklahoma City, OK 73114-2202 | Oil & Gas Operator | Nov 2022 |
| 183 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | Jan 2025 |
| 184 | Earlsboro Energies Corporation | Oklahoma City, OK 73116-3605 | Oil & Gas Operator | Jan 2025 |
| 185 | Echo E & P LLC | Oklahoma City, OK 73102-6439 | Oil & Gas Operator | Jan 2025 |
| 186 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 187 | Edwards & Leach Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2005 |
| 188 | Edwards Oil & Gas Company | Oklahoma City, OK 73156-0386 | Oil & Gas Operator | Mar 2015 |
| 189 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 190 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Feb 2025 |
| 191 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Feb 2025 |
| 192 | Ells Jr Harry A | Englewood, CO 80150 | Gas Operator | Feb 2017 |
| 193 | Enable Gas Transmission LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 194 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 195 | Enerfin Resources I Limited Partnership | Houston, TX 77077-2386 | Oil & Gas Operator | Apr 2023 |
| 196 | Energas Corporation | Oklahoma City, OK 73105 | Oil & Gas Operator | Feb 2025 |
| 197 | Enersource Royalty Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2013 |
| 198 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 199 | Enogex Services Corporation | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Apr 2009 |
| 200 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |