| 201 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Mar 2024 |
| 202 | Challenge Operating Inc | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 203 | Chambers & Hendrix Oil & Gas | Skiatook, OK 74070-0726 | Oil & Gas Operator | Aug 2022 |
| 204 | Chambers Jerry Expl Co | | Oil & Gas Operator | Sep 2000 |
| 205 | Champ Oil Company | Hickory Creek, TX 75065 | Oil & Gas Operator | Dec 2020 |
| 206 | Champion Reserves-Cri Inc | Oklahoma City, OK 73123 | Oil & Gas Operator | Jun 1994 |
| 207 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Mar 2024 |
| 208 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Feb 2024 |
| 209 | Chaney & Cogburn Roustabout Well Serv | Cement, OK 73017-0267 | Oil & Gas Operator | Mar 2015 |
| 210 | Chanse Energy Corporation | | Oil & Gas Operator | Sep 2021 |
| 211 | Chanse Petroleum Corporation | New York, NY 10165-1134 | Oil & Gas Operator | Feb 2015 |
| 212 | Chanze Oil Co., Inc. | Ocate, NM 87734 | Oil & Gas Operator | May 2024 |
| 213 | Chapel Operating LLC | | Oil Operator | Feb 2024 |
| 214 | Chapman Elise P Estate | | Oil & Gas Operator | Mar 2020 |
| 215 | Chapman Energy Oklahoma, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 216 | Chapman Exploration Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2013 |
| 217 | Chapman Jim | Bristow, OK 74010-1173 | Oil Operator | Apr 2021 |
| 218 | Chapman Oil Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2024 |
| 219 | Chapman Resources Corporation | Dallas, TX 75231 | Oil & Gas Operator | May 1999 |
| 220 | Charro Operating LLC | Englewood, CO 80112 | Oil & Gas Operator | May 2024 |
| 221 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2024 |
| 222 | Charter Services LLC | | Oil Operator | Mar 2024 |
| 223 | Chastain Diane | | Oil & Gas Operator | Feb 2015 |
| 224 | Chastain Land & Energy LLC | | Oil & Gas Operator | Sep 2017 |
| 225 | Chatham John | Wilson, OK 73463-9575 | Oil Operator | Feb 2014 |
| 226 | Chatham Verdell | Ratliff City, OK 73081-0061 | Oil Operator | Oct 2009 |
| 227 | Chatham VIckie R | Wilson, OK 73463-6510 | Oil Operator | Mar 2024 |
| 228 | Chatham, Maxine | | Oil Operator | Oct 2016 |
| 229 | Chen K Wendell | Arlington, TX 76016-2555 | Oil & Gas Operator | Mar 2015 |
| 230 | Chenhall Billy J | Haskell, OK 74436-8733 | Oil & Gas Operator | Sep 2015 |
| 231 | Cher Oil Company LTD | Ripley, OK 74062-6227 | Oil & Gas Operator | Feb 2024 |
| 232 | Chermac Energy Corporation | Edmond, OK 73083-5446 | Oil & Gas Operator | Apr 2020 |
| 233 | Cherokee Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 234 | Cherokee Royalties & Minerals Inc | Duncan, OK 73534-0415 | Oil & Gas Operator | Mar 2024 |
| 235 | Cherry, William H., Inc. | Oklahoma City, OK 73125 | Oil & Gas Operator | Mar 2015 |
| 236 | Chesapeake Energy MKT Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2022 |
| 237 | Chesapeake Exploration LLC | Oklahoma City, OK 731540496 | Oil & Gas Operator | Jul 2020 |
| 238 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2024 |
| 239 | Chesapeake Permian LP | Oklahoma City, OK 73118-1044 | Oil & Gas Operator | Feb 2015 |
| 240 | Chester Oil Company | Wetumka, OK 74883-6227 | Oil & Gas Operator | Mar 2024 |
| 241 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 242 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2024 |
| 243 | Chica Oil Company | Lago VIsta, TX 78645-6561 | Oil & Gas Operator | Mar 2001 |
| 244 | Chief Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 1995 |
| 245 | Chieftain Oil Co Inc | Kiowa, KS 67070 | Oil & Gas Operator | Mar 2024 |
| 246 | Chiles Jack Well Service | Atwood, OK 74827-0373 | Oil Operator | Apr 2014 |
| 247 | Chiles Robert Morris | Allen, OK 74825-8006 | Oil Operator | Feb 2024 |
| 248 | Chinn Alan | Bowring, OK 74009 | Oil & Gas Operator | Feb 2024 |
| 249 | Chinn, Larry E | | Oil & Gas Operator | Feb 2024 |
| 250 | Chinn, Velma D | | Oil Operator | Mar 2015 |
| 251 | Chisholm Oil And Gas Operating LLC | | Oil & Gas Operator | Mar 2024 |
| 252 | Chisholm Operating LLC | Oklahoma City, OK 73101-1502 | Oil & Gas Operator | Dec 2017 |
| 253 | Chisum G H | Duncan, OK 73533 | Oil & Gas Operator | Dec 2010 |
| 254 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | Jan 2024 |
| 255 | Choate Kenny Dba Rebound Oil Co | | Gas Operator | Mar 2024 |
| 256 | Chockley Energy LLC | | Gas Operator | Feb 2024 |
| 257 | Choctaw Gas Company | Quinton, OK 74561-0660 | Gas Operator | Feb 2024 |
| 258 | Cholla Petroleum, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2024 |
| 259 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Jan 2024 |
| 260 | Chowning Oil LLC | Bakersfield, CA 93314-9741 | Oil & Gas Operator | May 2013 |
| 261 | Chris Oil Co | Cambridge, OH 43725 | Oil & Gas Operator | Nov 2008 |
| 262 | Christa Oil Co | Cumberland, OH 43732 | Oil & Gas Operator | Nov 1999 |
| 263 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 264 | Christie Jr C B | Wichita Falls, TX 76308-4873 | Oil & Gas Operator | Jun 2023 |
| 265 | Cibola Energy Corporation | Albuquerque, NM 87103 | Oil & Gas Operator | Oct 2017 |
| 266 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 267 | Cig Resources Company | Colorado Spring, CO 80944-1087 | Oil & Gas Operator | Jun 2018 |
| 268 | Cigna Energy Resources Inc | Englewood, CO 80155-5038 | Oil Operator | Nov 1998 |
| 269 | Cima Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2022 |
| 270 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 271 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 272 | Cimarron Management Corp | | Oil & Gas Operator | Jul 2020 |
| 273 | Cimarron Oil & Gas Inc | Perry, OK 73077-1318 | Oil & Gas Operator | Sep 2000 |
| 274 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 275 | Cimarron Petroleum Corporation | Houston, TX 77057-2696 | Oil & Gas Operator | Feb 2024 |
| 276 | Cimarron Production Co Inc | Oklahoma City, OK 73142-3017 | Oil & Gas Operator | Feb 2024 |
| 277 | Cimarron River Operating Co | Mannford, OK 74044-0289 | Oil & Gas Operator | Feb 2024 |
| 278 | Cimarron Valley Energy Inc | Stillwater, OK 74076 | Oil Operator | Apr 2015 |
| 279 | Circle 9 Resources LLC | | Oil & Gas Operator | Feb 2024 |
| 280 | Circle C Oilfield Supply Inc | Wetumka, OK 74883-0068 | Oil & Gas Operator | Apr 2017 |
| 281 | Circle K Oil & Gas Inc | Sand Springs, OK 74063-0276 | Oil & Gas Operator | Feb 2024 |
| 282 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Feb 2024 |
| 283 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Mar 2024 |
| 284 | Citadel Production Company, Inc. | Denver, CO 80201 | Oil Operator | Sep 1996 |
| 285 | Citation Energy | | Oil & Gas Operator | Jul 1993 |
| 286 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2024 |
| 287 | Cities Services Company | | Oil & Gas Operator | Mar 2008 |
| 288 | Citizen Energy II LLC | | Oil & Gas Operator | Jan 2024 |
| 289 | Citizen Energy III LLC | | Oil & Gas Operator | Mar 2024 |
| 290 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 291 | Civic Energy Corporation | | Oil & Gas Operator | Feb 2024 |
| 292 | CK Resources | Cleveland, OK 74020-0772 | Oil Operator | Aug 2013 |
| 293 | Claassen Oil And Gas, Inc. | Estes Park, CO 80517 | Oil & Gas Operator | Jan 2024 |
| 294 | Claborn Julia | Okmulgee, OK 74447-9781 | Oil & Gas Operator | Mar 2022 |
| 295 | Claiborne-McDonald Inc | Chickasha, OK 73018 | Oil Operator | Jul 2007 |
| 296 | Clapp Carl O | Cedar Vale, KS 67024 | Oil Operator | Aug 2013 |
| 297 | Claremont Corporation | Tulsa, OK 74101-3226 | Oil & Gas Operator | Feb 2017 |
| 298 | Claremont Exploration Inc | Tulsa, OK 74103-4107 | Oil & Gas Operator | Jun 1997 |
| 299 | Clarita Operating LLC | Ada, OK 74821-2570 | Oil Operator | Jun 2022 |
| 300 | Clark And Clark | Princeton, NJ 08540-1930 | Oil & Gas Operator | Jul 2013 |