| 2201 | Cooper A L & Mae C | | Oil & Gas Operator | Jan 2001 |
| 2202 | Cooper Energy Corp | | Oil & Gas Operator | Jun 1995 |
| 2203 | Cooper John T | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 2204 | Cooper Lisa L | Cushing, OK 74023 | Oil & Gas Operator | Mar 2015 |
| 2205 | Cooper Mineral Group Inc | Bellaire, TX 77401 | Oil & Gas Operator | Feb 2004 |
| 2206 | Cooper Oil & Gas, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2010 |
| 2207 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 2208 | Cooper Oil Company | Andover, KS 67002 | Oil Operator | Oct 1997 |
| 2209 | Cooper Oil Inc | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 2210 | Cooper Operating | Olney, TX 76374 | Oil Operator | Apr 2007 |
| 2211 | Cooper Operating LLC | Yukon, OK 73099 | Oil & Gas Operator | Feb 2025 |
| 2212 | Cooper Production Company | New Braunfels, TX 78132 | Oil & Gas Operator | Sep 2021 |
| 2213 | Cooper Service Co. | | Oil & Gas Operator | Nov 2024 |
| 2214 | Cooper, Glenn W. Oil & Gas | Seymour, TX 76380 | Oil & Gas Operator | Feb 2000 |
| 2215 | Cooper, J. M. | Winfield, KS 67119 | Oil Operator | Oct 1997 |
| 2216 | Cooper, Lowell E. | Peabody, KS 66866 | Oil Operator | Nov 1987 |
| 2217 | Coors Energy | Golden, CO 80402-0467 | Oil & Gas Operator | Sep 1992 |
| 2218 | Coots, Jesse | Le Roy, NY 14482 | Gas Operator | Dec 2023 |
| 2219 | Copano Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 2220 | Copano Gas Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 2221 | Cope Oil Company | Valley VIew, TX 76272 | Oil & Gas Operator | Feb 2015 |
| 2222 | Copeland Gas LLC | Albion, PA 16401 | Gas Operator | Dec 2024 |
| 2223 | Copestone Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | Apr 2025 |
| 2224 | Copper Land Resources LLC | | Oil Operator | Jan 2025 |
| 2225 | Copper Ridge Oil Inc | Olean, NY 14760 | Oil & Gas Operator | Dec 2023 |
| 2226 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Feb 2025 |
| 2227 | Copperhead Creek Enterprises, Inc. | Chautauqua, KS 67334 | Oil Operator | Sep 2019 |
| 2228 | Copperhead Enterprises LLC | Ludlow, PA 16333-0057 | Oil & Gas Operator | Dec 2024 |
| 2229 | Copperhead Oil | Colony, KS 66015 | Oil Operator | Sep 1985 |
| 2230 | Copperhead Oil & Gas, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2017 |
| 2231 | Coppertop | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2025 |
| 2232 | Coppock Herb Energy | Fairview, OK 73737-1037 | Oil & Gas Operator | May 2018 |
| 2233 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 2234 | Coral Coast Petroleum, L.C. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 2235 | Coral E&P, LLC | Adkins, TX 78101 | Oil & Gas Operator | Apr 2025 |
| 2236 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Jan 2025 |
| 2237 | Corbell Wayne L | Fort Worth, TX 76111-4615 | Oil & Gas Operator | Apr 2023 |
| 2238 | Corbell, W. D. | Dublin, TX 76446 | Oil & Gas Operator | Dec 2001 |
| 2239 | Corda Corporation | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 2025 |
| 2240 | Cordele Development Corporation | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2025 |
| 2241 | Cordero Energy Operating LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2020 |
| 2242 | Cordero Mining Co | Gillette, WY 82717 | Oil Operator | Nov 2009 |
| 2243 | Cordero Oil And Gas LLC | Gillette, WY 82716 | Oil Operator | Nov 2021 |
| 2244 | Cordex Petroleums, Inc. | | Oil & Gas Operator | Jun 1996 |
| 2245 | Cordillera Corporation | Denver, CO 80237 | Oil & Gas Operator | Feb 1996 |
| 2246 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Jan 2025 |
| 2247 | Cordillera Energy Partners III LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Mar 2014 |
| 2248 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 2249 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 2250 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 2251 | Core Appalachia Operating LLC | Charleston, WV 25362 | Oil & Gas Operator | Dec 2023 |
| 2252 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Apr 2025 |
| 2253 | Core Energy LLC | | Oil & Gas Operator | Jan 2025 |
| 2254 | Core Minerals Operating Co Inc | | Oil & Gas Operator | Dec 2023 |
| 2255 | Core Petro, LLC | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 2256 | Core Solutions LLC | | Oil & Gas Operator | Dec 2021 |
| 2257 | Corenergy Operating Group, LLC | Houston, TX 77074 | Oil & Gas Operator | Apr 2025 |
| 2258 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Apr 2025 |
| 2259 | Corfu Darien Properties, LLC | Corfu, NY 14036 | Gas Operator | Dec 2023 |
| 2260 | Corgray Holdings, LLC | Fulshear, TX 77441 | Gas Operator | Mar 2016 |
| 2261 | Corie Oil Co., Inc. | Russell, KS 67665 | Oil Operator | Feb 2003 |
| 2262 | Corie Oil Compan | | Oil Operator | Jul 1985 |
| 2263 | Corinne Grace | Carlsbad, NM 88220 | Oil & Gas Operator | Jan 2011 |
| 2264 | Corinthian Exploration (USA) Corp | | Oil & Gas Operator | Apr 2016 |
| 2265 | Cork Petroleum Corporation | Thermopolis, WY 82443 | Oil & Gas Operator | Apr 2012 |
| 2266 | Corkran Energy, LP | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 2267 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2025 |
| 2268 | Corley G R | | Oil & Gas Operator | Jun 2009 |
| 2269 | Corley Production Company | Wilson, OK 73463-7218 | Oil Operator | Feb 2025 |
| 2270 | Corley Production Inc | Comanche, OK 73529-4668 | Oil Operator | Mar 2015 |
| 2271 | Corley, Henry Oil Properties LLC | El Dorado, AR 71730 | Oil Operator | Jan 2025 |
| 2272 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 2273 | Cornelius Dale | Willow, OK 73673 | Oil Operator | Jan 2025 |
| 2274 | Cornelius Oil Company | Kellyville, OK 74039-0459 | Oil & Gas Operator | Jul 2015 |
| 2275 | Cornelius Oil Inc | Kellyville, OK 74039 | Oil & Gas Operator | Jan 2025 |
| 2276 | Cornelius Petroleum Inc | Kellyville, OK 74039 | Oil & Gas Operator | Jan 2025 |
| 2277 | Cornelius Phillip J & Connie | Kellyville, OK 74039 | Oil & Gas Operator | Dec 2000 |
| 2278 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | Dec 2024 |
| 2279 | Cornell Glen R | Pauls Valley, OK 73075-9606 | Oil & Gas Operator | Oct 2013 |
| 2280 | Cornell Oil Company | | Oil & Gas Operator | May 1985 |
| 2281 | Cornell Rich M - | | Oil & Gas Operator | May 1993 |
| 2282 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 2283 | Corner Operating Company, Inc | New York, NY 10165 | Oil & Gas Operator | Dec 1999 |
| 2284 | Cornerstone E & P Company, LP | Irving, TX 75038 | Oil & Gas Operator | Nov 2010 |
| 2285 | Cornerstone Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Nov 2011 |
| 2286 | Cornerstone Energy, LLC | Magnolia, AR 71753 | Oil & Gas Operator | Oct 2024 |
| 2287 | Cornerstone Gas Processing Inc | | Oil Operator | Jan 1999 |
| 2288 | Cornerstone Minerals LTD | | Oil & Gas Operator | Dec 2009 |
| 2289 | Cornerstone Mining, LLC | | Gas Operator | Sep 2019 |
| 2290 | Cornerstone Natural Gas Co. | | Oil Operator | Oct 1999 |
| 2291 | Cornerstone Natural Resources LLC | Denver, CO 80234 | Oil & Gas Operator | Feb 2025 |
| 2292 | Cornerstone Oil Trust | San Antonio, TX 78251 | Oil & Gas Operator | Jul 2003 |
| 2293 | Cornie Creek Corporation | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 2294 | Corning Oil Co Inc | Sonora, OH 43785 | Oil & Gas Operator | Dec 2002 |
| 2295 | Cornwell Well Service, Inc. | | Oil & Gas Operator | Feb 2010 |
| 2296 | Cornwell, G. G. | | Oil & Gas Operator | Sep 2009 |
| 2297 | Corona Development Co. Inc. | | Oil Operator | Dec 1989 |
| 2298 | Corona Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 2299 | Corona Operating, LLC | Midland, TX 79702 | Oil Operator | Apr 2025 |
| 2300 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |