| 2201 | Cordero Mining Co | Gillette, WY 82717 | Oil Operator | Nov 2009 |
| 2202 | Cordero Oil And Gas LLC | Gillette, WY 82716 | Oil Operator | Nov 2021 |
| 2203 | Cordex Petroleums, Inc. | | Oil & Gas Operator | Jun 1996 |
| 2204 | Cordillera Corporation | Denver, CO 80237 | Oil & Gas Operator | Feb 1996 |
| 2205 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Jun 2025 |
| 2206 | Cordillera Energy Partners III LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Mar 2014 |
| 2207 | Cordillera Energy Partners LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 2208 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 2209 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 2210 | Core Appalachia Operating LLC | Charleston, WV 25362 | Oil & Gas Operator | Dec 2023 |
| 2211 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Sep 2025 |
| 2212 | Core Energy LLC | | Oil & Gas Operator | Jun 2025 |
| 2213 | Core Minerals Operating Co Inc | | Oil & Gas Operator | Dec 2023 |
| 2214 | Core Petro, LLC | Abilene, TX 79608 | Oil & Gas Operator | Sep 2025 |
| 2215 | Core S&S LLC | Thayer, KS 66776 | Oil Operator | Apr 2025 |
| 2216 | Core Solutions LLC | | Oil & Gas Operator | Dec 2021 |
| 2217 | Corenergy Operating Group, LLC | Houston, TX 77074 | Oil & Gas Operator | Sep 2025 |
| 2218 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Sep 2025 |
| 2219 | Corfu Darien Properties, LLC | Corfu, NY 14036 | Gas Operator | Dec 2024 |
| 2220 | Corgray Holdings, LLC | Fulshear, TX 77441 | Gas Operator | Mar 2016 |
| 2221 | Corie Oil Co., Inc. | Russell, KS 67665 | Oil Operator | Feb 2003 |
| 2222 | Corie Oil Compan | | Oil Operator | Jul 1985 |
| 2223 | Corinne Grace | Carlsbad, NM 88220 | Oil & Gas Operator | Jan 2011 |
| 2224 | Corinthian Exploration (USA) Corp | | Oil & Gas Operator | Apr 2016 |
| 2225 | Cork Petroleum Corporation | Thermopolis, WY 82443 | Oil & Gas Operator | Apr 2012 |
| 2226 | Corkran Energy, LP | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 2227 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Sep 2025 |
| 2228 | Corley G R | | Oil & Gas Operator | Jun 2009 |
| 2229 | Corley Production Company | Wilson, OK 73463-7218 | Oil Operator | Jun 2025 |
| 2230 | Corley Production Inc | Comanche, OK 73529-4668 | Oil Operator | Mar 2015 |
| 2231 | Corley, Henry Oil Properties LLC | El Dorado, AR 71730 | Oil Operator | Jan 2025 |
| 2232 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 2233 | Cornelius Dale | Willow, OK 73673 | Oil Operator | Jun 2025 |
| 2234 | Cornelius Oil Company | Kellyville, OK 74039-0459 | Oil & Gas Operator | Jul 2015 |
| 2235 | Cornelius Oil Inc | Kellyville, OK 74039 | Oil & Gas Operator | Jul 2025 |
| 2236 | Cornelius Petroleum Inc | | Oil & Gas Operator | Jul 2025 |
| 2237 | Cornelius Phillip J & Connie | Kellyville, OK 74039 | Oil & Gas Operator | Dec 2000 |
| 2238 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | Apr 2025 |
| 2239 | Cornelius, Steven L | | Oil Operator | Sep 2015 |
| 2240 | Cornell Glen R | Pauls Valley, OK 73075-9606 | Oil & Gas Operator | Oct 2013 |
| 2241 | Cornell Oil Company | | Oil & Gas Operator | May 1985 |
| 2242 | Cornell Rich M - | | Oil & Gas Operator | May 1993 |
| 2243 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 2244 | Corner Operating Company, Inc | New York, NY 10165 | Oil & Gas Operator | Dec 1999 |
| 2245 | Cornerstone E & P Company LP | Irving, TX 75038 | Oil & Gas Operator | Nov 2010 |
| 2246 | Cornerstone Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Nov 2011 |
| 2247 | Cornerstone Energy, LLC | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 2248 | Cornerstone Gas Processing Inc | | Oil Operator | Jan 1999 |
| 2249 | Cornerstone Minerals LTD | | Oil & Gas Operator | Dec 2009 |
| 2250 | Cornerstone Mining, LLC | | Gas Operator | Sep 2019 |
| 2251 | Cornerstone Natural Gas Co. | | Oil Operator | Oct 1999 |
| 2252 | Cornerstone Natural Resources LLC | Denver, CO 80234 | Oil & Gas Operator | Jul 2025 |
| 2253 | Cornerstone Oil Trust | San Antonio, TX 78251 | Oil & Gas Operator | Jul 2003 |
| 2254 | Cornie Creek Corporation | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 2255 | Corning Oil Co Inc | Sonora, OH 43785 | Oil & Gas Operator | Dec 2002 |
| 2256 | Cornwell Well Service, Inc. | | Oil & Gas Operator | Feb 2010 |
| 2257 | Cornwell, G. G. | | Oil & Gas Operator | Sep 2009 |
| 2258 | Corona Development Co. Inc. | | Oil Operator | Dec 1989 |
| 2259 | Corona Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 2260 | Corona Operating, LLC | Midland, TX 79702 | Oil Operator | Sep 2025 |
| 2261 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 2262 | Coronado Energy Partners LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2025 |
| 2263 | Coronado Great Plains LLC | Tulsa, OK 74137-2832 | Gas Operator | Apr 2013 |
| 2264 | Coronado Kansas, LLC | Tulsa, OK 74133 | Oil Operator | Oct 2009 |
| 2265 | Coronado Minerals, LLC | Houston, TX 77208 | Oil & Gas Operator | Sep 2025 |
| 2266 | Coronado Oil | Lindsborg, KS 67456 | Oil Operator | Sep 1985 |
| 2267 | Coronado Oil & G | | Oil Operator | Dec 1996 |
| 2268 | Coronado Oil & Gas, Inc. | Great Bend, KS 67530 | Oil Operator | Jul 2004 |
| 2269 | Coronado Oil & Minerals Co. | | Oil & Gas Operator | Sep 1980 |
| 2270 | Coronado Oil Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 2271 | Coronado Oil, Inc. | Salina, KS 67401 | Oil Operator | May 1990 |
| 2272 | Coronado Oklahoma LLC | Tulsa, OK 74133-7036 | Gas Operator | Apr 2020 |
| 2273 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Jul 2025 |
| 2274 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 2275 | Corpus Christi Leaseholds, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 1996 |
| 2276 | Corpus Christi Oil & Gas Co. | | Oil & Gas Operator | Dec 1991 |
| 2277 | Correll, Spencer | Perryton, TX 79070 | Oil & Gas Operator | Sep 2025 |
| 2278 | Corrida Oil Inc | Denver, CO 80217 | Oil & Gas Operator | Jun 1990 |
| 2279 | Corriente Operating Company LLC | Taft, TX 78390 | Oil & Gas Operator | Sep 2025 |
| 2280 | Corsa Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 2281 | Corsair Energy, LC | Wichita, KS 67202 | Oil & Gas Operator | Apr 2004 |
| 2282 | Corsicana Crude Company, LLC | Denver, CO 80202 | Oil Operator | Sep 2025 |
| 2283 | Corsicana Crude Holdings, LLC | Denver, CO 80202 | Oil Operator | Sep 2025 |
| 2284 | Corsicana Field Fund | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1993 |
| 2285 | Corsicana Oil & Gas | Corsicana, TX 75151 | Oil Operator | Sep 2025 |
| 2286 | Cortam, Inc. | Augusta, KS 67010 | Oil Operator | Dec 2024 |
| 2287 | Corterra Energy Operating LLC | Tulsa, OK 74119-4844 | Oil & Gas Operator | Aug 2021 |
| 2288 | Cortex Energy, Inc. | Wichita, KS 67217 | Oil & Gas Operator | Dec 2024 |
| 2289 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 2290 | Cortland Energy Co Inc | Worthington, OH 43085 | Oil & Gas Operator | Dec 2024 |
| 2291 | Corum Operating Company, LLC | Houston, TX 77055 | Oil & Gas Operator | Sep 2025 |
| 2292 | Corum Production Co.-Tepco | | Oil & Gas Operator | Dec 1989 |
| 2293 | Corum Production Company | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 2294 | Corvette Oil Corporation | Fort Worth, TX 76115 | Oil & Gas Operator | Mar 2008 |
| 2295 | Corwin, B. V. | Enid, OK 73701 | Oil & Gas Operator | Apr 2017 |
| 2296 | Cory, Kenneth W. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2012 |
| 2297 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Sep 2025 |
| 2298 | Coseka Resources USA LTD | Denver, CO 80202-1602 | Oil & Gas Operator | Jun 1988 |
| 2299 | Cosgriff Joe | Detroit, MI 48208 | Oil & Gas Operator | Dec 1998 |
| 2300 | Coshocton Pipe Co | Columbus, OH 43229 | Oil & Gas Operator | Dec 1989 |