| 2201 | Copperhead Oil & Gas, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2017 |
| 2202 | Coppertop | San Angelo, TX 76904 | Oil & Gas Operator | Jun 2025 |
| 2203 | Coppock Herb Energy | Fairview, OK 73737-1037 | Oil & Gas Operator | May 2018 |
| 2204 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 2205 | Coral Coast Petroleum, L.C. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 2206 | Coral E&P, LLC | Adkins, TX 78101 | Oil & Gas Operator | Jun 2025 |
| 2207 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Mar 2025 |
| 2208 | Corbell Wayne L | Fort Worth, TX 76111-4615 | Oil & Gas Operator | Apr 2023 |
| 2209 | Corbell, W. D. | Dublin, TX 76446 | Oil & Gas Operator | Dec 2001 |
| 2210 | Corda Corporation | Wichita Falls, TX 76302 | Oil & Gas Operator | Jun 2025 |
| 2211 | Cordele Development Corporation | San Antonio, TX 78205 | Oil & Gas Operator | Jun 2025 |
| 2212 | Cordero Energy Operating LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2020 |
| 2213 | Cordero Mining Co | Gillette, WY 82717 | Oil Operator | Nov 2009 |
| 2214 | Cordero Oil And Gas LLC | Gillette, WY 82716 | Oil Operator | Nov 2021 |
| 2215 | Cordex Petroleums, Inc. | | Oil & Gas Operator | Jun 1996 |
| 2216 | Cordillera Corporation | Denver, CO 80237 | Oil & Gas Operator | Feb 1996 |
| 2217 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Mar 2025 |
| 2218 | Cordillera Energy Partners III LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Mar 2014 |
| 2219 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 2220 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 2221 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 2222 | Core Appalachia Operating LLC | Charleston, WV 25362 | Oil & Gas Operator | Dec 2023 |
| 2223 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Jun 2025 |
| 2224 | Core Energy LLC | | Oil & Gas Operator | Apr 2025 |
| 2225 | Core Minerals Operating Co Inc | | Oil & Gas Operator | Dec 2023 |
| 2226 | Core Petro, LLC | Abilene, TX 79608 | Oil & Gas Operator | Jun 2025 |
| 2227 | Core Solutions LLC | | Oil & Gas Operator | Dec 2021 |
| 2228 | Corenergy Operating Group, LLC | Houston, TX 77074 | Oil & Gas Operator | Jun 2025 |
| 2229 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Jun 2025 |
| 2230 | Corfu Darien Properties, LLC | Corfu, NY 14036 | Gas Operator | Dec 2023 |
| 2231 | Corgray Holdings, LLC | Fulshear, TX 77441 | Gas Operator | Mar 2016 |
| 2232 | Corie Oil Co., Inc. | Russell, KS 67665 | Oil Operator | Feb 2003 |
| 2233 | Corie Oil Compan | | Oil Operator | Jul 1985 |
| 2234 | Corinne Grace | Carlsbad, NM 88220 | Oil & Gas Operator | Jan 2011 |
| 2235 | Corinthian Exploration (USA) Corp | | Oil & Gas Operator | Apr 2016 |
| 2236 | Cork Petroleum Corporation | Thermopolis, WY 82443 | Oil & Gas Operator | Apr 2012 |
| 2237 | Corkran Energy, LP | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 2238 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2025 |
| 2239 | Corley G R | | Oil & Gas Operator | Jun 2009 |
| 2240 | Corley Production Company | Wilson, OK 73463-7218 | Oil Operator | Apr 2025 |
| 2241 | Corley Production Inc | Comanche, OK 73529-4668 | Oil Operator | Mar 2015 |
| 2242 | Corley, Henry Oil Properties LLC | El Dorado, AR 71730 | Oil Operator | Jan 2025 |
| 2243 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 2244 | Cornelius Dale | Willow, OK 73673 | Oil Operator | Jan 2025 |
| 2245 | Cornelius Oil Company | Kellyville, OK 74039-0459 | Oil & Gas Operator | Jul 2015 |
| 2246 | Cornelius Oil Inc | Kellyville, OK 74039 | Oil & Gas Operator | Mar 2025 |
| 2247 | Cornelius Petroleum Inc | | Oil & Gas Operator | Mar 2025 |
| 2248 | Cornelius Phillip J & Connie | Kellyville, OK 74039 | Oil & Gas Operator | Dec 2000 |
| 2249 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | Dec 2024 |
| 2250 | Cornelius, Steven L | | Oil Operator | Sep 2015 |
| 2251 | Cornell Glen R | Pauls Valley, OK 73075-9606 | Oil & Gas Operator | Oct 2013 |
| 2252 | Cornell Oil Company | | Oil & Gas Operator | May 1985 |
| 2253 | Cornell Rich M - | | Oil & Gas Operator | May 1993 |
| 2254 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 2255 | Corner Operating Company, Inc | New York, NY 10165 | Oil & Gas Operator | Dec 1999 |
| 2256 | Cornerstone E & P Company LP | Irving, TX 75038 | Oil & Gas Operator | Nov 2010 |
| 2257 | Cornerstone Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Nov 2011 |
| 2258 | Cornerstone Energy, LLC | Magnolia, AR 71753 | Oil & Gas Operator | Nov 2024 |
| 2259 | Cornerstone Gas Processing Inc | | Oil Operator | Jan 1999 |
| 2260 | Cornerstone Minerals LTD | | Oil & Gas Operator | Dec 2009 |
| 2261 | Cornerstone Mining, LLC | | Gas Operator | Sep 2019 |
| 2262 | Cornerstone Natural Gas Co. | | Oil Operator | Oct 1999 |
| 2263 | Cornerstone Natural Resources LLC | Denver, CO 80234 | Oil & Gas Operator | Apr 2025 |
| 2264 | Cornerstone Oil Trust | San Antonio, TX 78251 | Oil & Gas Operator | Jul 2003 |
| 2265 | Cornie Creek Corporation | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 2266 | Corning Oil Co Inc | Sonora, OH 43785 | Oil & Gas Operator | Dec 2002 |
| 2267 | Cornwell Well Service, Inc. | | Oil & Gas Operator | Feb 2010 |
| 2268 | Cornwell, G. G. | | Oil & Gas Operator | Sep 2009 |
| 2269 | Corona Development Co. Inc. | | Oil Operator | Dec 1989 |
| 2270 | Corona Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 2271 | Corona Operating, LLC | Midland, TX 79702 | Oil Operator | Jun 2025 |
| 2272 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 2273 | Coronado Energy Partners LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 2274 | Coronado Great Plains LLC | Tulsa, OK 74137-2832 | Gas Operator | Apr 2013 |
| 2275 | Coronado Kansas, LLC | Tulsa, OK 74133 | Oil Operator | Oct 2009 |
| 2276 | Coronado Minerals, LLC | Houston, TX 77208 | Oil & Gas Operator | Jun 2025 |
| 2277 | Coronado Oil | Lindsborg, KS 67456 | Oil Operator | Sep 1985 |
| 2278 | Coronado Oil & G | | Oil Operator | Dec 1996 |
| 2279 | Coronado Oil & Gas, Inc. | Great Bend, KS 67530 | Oil Operator | Jul 2004 |
| 2280 | Coronado Oil & Minerals Co. | | Oil & Gas Operator | Sep 1980 |
| 2281 | Coronado Oil Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 2282 | Coronado Oil, Inc. | Salina, KS 67401 | Oil Operator | May 1990 |
| 2283 | Coronado Oklahoma LLC | Tulsa, OK 74133-7036 | Gas Operator | Apr 2020 |
| 2284 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Mar 2025 |
| 2285 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 2286 | Corpus Christi Leaseholds, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 1996 |
| 2287 | Corpus Christi Oil & Gas Co. | | Oil & Gas Operator | Dec 1991 |
| 2288 | Correll, Spencer | Perryton, TX 79070 | Oil & Gas Operator | Jun 2025 |
| 2289 | Corrida Oil Inc | Denver, CO 80217 | Oil & Gas Operator | Jun 1990 |
| 2290 | Corriente Operating Company LLC | Taft, TX 78390 | Oil & Gas Operator | Jun 2025 |
| 2291 | Corsa Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 2292 | Corsair Energy, LC | Wichita, KS 67202 | Oil & Gas Operator | Apr 2004 |
| 2293 | Corsicana Crude Company, LLC | Denver, CO 80202 | Oil Operator | Jun 2025 |
| 2294 | Corsicana Crude Holdings, LLC | Denver, CO 80202 | Oil Operator | Jun 2025 |
| 2295 | Corsicana Field Fund | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1993 |
| 2296 | Corsicana Oil & Gas | Corsicana, TX 75151 | Oil Operator | Jun 2025 |
| 2297 | Cortam, Inc. | Augusta, KS 67010 | Oil Operator | Dec 2024 |
| 2298 | Corterra Energy Operating LLC | Tulsa, OK 74119-4844 | Oil & Gas Operator | Aug 2021 |
| 2299 | Cortex Energy, Inc. | Wichita, KS 67217 | Oil & Gas Operator | Dec 2024 |
| 2300 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |