| 6301 | Cooke & Montague Oper. Co., Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | Jun 2026 |
| 6302 | Cooke County Production Company | Shawnee, OK 74801-1800 | Oil & Gas Operator | Jan 2022 |
| 6303 | Cooke Energy Company | San Antonio, TX 78250 | Oil & Gas Operator | Jul 2012 |
| 6304 | Cooke, Donald E./Lee Wanda | Coffeyville, KS 67331 | Oil Operator | Dec 2001 |
| 6305 | Cooke, Kenny D. Operating | Ballinger, TX 76821 | Oil & Gas Operator | Mar 2004 |
| 6306 | Coolidge, G. B., Inc. | Shelby, MT 59474 | Oil & Gas Operator | Aug 2016 |
| 6307 | Coolidge, Paul | | Oil Operator | Jan 2026 |
| 6308 | Coolidge, Timothy J & Billiette Nebel | Kevin, MT 59454 | Oil Operator | Jan 2026 |
| 6309 | Coolspring Gas & Oil Co LLC | Coolspring, PA 15730-8524 | Gas Operator | Dec 2025 |
| 6310 | Coomer, Mitchell | Columbia, KY 42728 | Oil Operator | Dec 2024 |
| 6311 | Coon Creek Gas Inc | | Oil & Gas Operator | Mar 2014 |
| 6312 | Coop Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2026 |
| 6313 | Cooper & Brain Inc. | | Oil & Gas Operator | Mar 2026 |
| 6314 | Cooper A L & Mae C | | Oil & Gas Operator | Jan 2001 |
| 6315 | Cooper Energy Corp | | Oil & Gas Operator | Jun 1995 |
| 6316 | Cooper John T | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 6317 | Cooper Lisa L | Cushing, OK 74023 | Oil & Gas Operator | Mar 2015 |
| 6318 | Cooper Mineral Group Inc | Bellaire, TX 77401 | Oil & Gas Operator | Feb 2004 |
| 6319 | Cooper Oil & Gas, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2010 |
| 6320 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2026 |
| 6321 | Cooper Oil Company | Andover, KS 67002 | Oil Operator | Oct 1997 |
| 6322 | Cooper Oil Inc | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 6323 | Cooper Operating | Olney, TX 76374 | Oil Operator | Apr 2007 |
| 6324 | Cooper Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2026 |
| 6325 | Cooper Production Company | New Braunfels, TX 78132 | Oil & Gas Operator | Sep 2021 |
| 6326 | Cooper Service Co. | | Oil & Gas Operator | Sep 2025 |
| 6327 | Cooper, Glenn W. Oil & Gas | Seymour, TX 76380 | Oil & Gas Operator | Feb 2000 |
| 6328 | Cooper, J. M. | Winfield, KS 67119 | Oil Operator | Oct 1997 |
| 6329 | Cooper, Lowell E. | Peabody, KS 66866 | Oil Operator | Nov 1987 |
| 6330 | Coors Energy | Golden, CO 80402-0467 | Oil & Gas Operator | Sep 1992 |
| 6331 | Coots, Jesse | Le Roy, NY 14482 | Gas Operator | Dec 2024 |
| 6332 | Copano Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 6333 | Copano Gas Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 6334 | Cope Oil Company | Valley VIew, TX 76272 | Oil & Gas Operator | Feb 2015 |
| 6335 | Copeland Gas LLC | Albion, PA 16401 | Gas Operator | Dec 2025 |
| 6336 | Copestone Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 6337 | Copper Land Resources LLC | | Oil Operator | Apr 2026 |
| 6338 | Copper Ridge Oil Inc | Olean, NY 14760 | Oil & Gas Operator | Dec 2024 |
| 6339 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Feb 2025 |
| 6340 | Copperhead Creek Enterprises, Inc. | Chautauqua, KS 67334 | Oil Operator | Sep 2019 |
| 6341 | Copperhead Enterprises LLC | | Oil & Gas Operator | Dec 2025 |
| 6342 | Copperhead Oil | Colony, KS 66015 | Oil Operator | Sep 1985 |
| 6343 | Copperhead Oil & Gas, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2017 |
| 6344 | Coppertop | San Angelo, TX 76904 | Oil & Gas Operator | Jun 2026 |
| 6345 | Coppock Herb Energy | Fairview, OK 73737-1037 | Oil & Gas Operator | May 2018 |
| 6346 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 6347 | Coral Coast Petroleum, L.C. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 6348 | Coral E&P, LLC | Adkins, TX 78101 | Oil & Gas Operator | Jun 2026 |
| 6349 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Feb 2026 |
| 6350 | Corbell Wayne L | Arlinton, TX 76006 | Oil & Gas Operator | Apr 2023 |
| 6351 | Corbell, W. D. | Dublin, TX 76446 | Oil & Gas Operator | Dec 2001 |
| 6352 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2026 |
| 6353 | Cordele Development Corporation | San Antonio, TX 78205 | Oil & Gas Operator | Jun 2026 |
| 6354 | Cordero Energy Operating LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2020 |
| 6355 | Cordero Mining Co | Gillette, WY 82717 | Oil Operator | Nov 2009 |
| 6356 | Cordero Oil And Gas LLC | Gillette, WY 82716 | Oil Operator | Nov 2021 |
| 6357 | Cordex Petroleums, Inc. | | Oil & Gas Operator | Jun 1996 |
| 6358 | Cordillera Corporation | Denver, CO 80237 | Oil & Gas Operator | Feb 1996 |
| 6359 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Mar 2026 |
| 6360 | Cordillera Energy Partners III LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Mar 2014 |
| 6361 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 6362 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 6363 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 6364 | Core Antrim Company LLC | | Gas Operator | Apr 2026 |
| 6365 | Core Appalachia Operating LLC | Charleston, WV 25362 | Oil & Gas Operator | Dec 2024 |
| 6366 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Jun 2026 |
| 6367 | Core Energy LLC | | Oil & Gas Operator | Apr 2026 |
| 6368 | Core Minerals Operating Co Inc | | Oil & Gas Operator | Dec 2024 |
| 6369 | Core Petro, LLC | Abilene, TX 79608 | Oil & Gas Operator | Jun 2026 |
| 6370 | Core Solutions LLC | | Oil & Gas Operator | Dec 2021 |
| 6371 | Corenergy Operating Group, LLC | Houston, TX 77074 | Oil & Gas Operator | Jun 2026 |
| 6372 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Jun 2026 |
| 6373 | Corfu Darien Properties, LLC | Corfu, NY 14036 | Gas Operator | Dec 2024 |
| 6374 | Corie Oil Co., Inc. | Russell, KS 67665 | Oil Operator | Feb 2003 |
| 6375 | Corie Oil Compan | | Oil Operator | Jul 1985 |
| 6376 | Corinne Grace | Carlsbad, NM 88220 | Oil & Gas Operator | Jan 2011 |
| 6377 | Corinthian Exploration (USA) Corp | | Oil & Gas Operator | Apr 2016 |
| 6378 | Cork Petroleum Corporation | Thermopolis, WY 82443 | Oil & Gas Operator | Apr 2012 |
| 6379 | Corkran Energy, LP | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 6380 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2026 |
| 6381 | Corley G R | | Oil & Gas Operator | Jun 2009 |
| 6382 | Corley Production Company | Wilson, OK 73463-7218 | Oil Operator | Apr 2026 |
| 6383 | Corley Production Inc | Comanche, OK 73529-4668 | Oil Operator | Mar 2015 |
| 6384 | Corley, Henry Oil Properties LLC | El Dorado, AR 71730 | Oil Operator | Jan 2025 |
| 6385 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 6386 | Cornelius Dale | Willow, OK 73673 | Oil Operator | Mar 2026 |
| 6387 | Cornelius Oil Company | Kellyville, OK 74039-0459 | Oil & Gas Operator | Jul 2015 |
| 6388 | Cornelius Oil Inc | Kellyville, OK 74039 | Oil & Gas Operator | Apr 2026 |
| 6389 | Cornelius Petroleum Inc | | Oil & Gas Operator | Apr 2026 |
| 6390 | Cornelius Phillip J & Connie | Kellyville, OK 74039 | Oil & Gas Operator | Dec 2000 |
| 6391 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | Apr 2026 |
| 6392 | Cornelius, Steven L | | Oil Operator | Sep 2015 |
| 6393 | Cornell Glen R | Pauls Valley, OK 73075-9606 | Oil & Gas Operator | Oct 2013 |
| 6394 | Cornell Oil Company | | Oil & Gas Operator | May 1985 |
| 6395 | Cornell Rich M - | | Oil & Gas Operator | May 1993 |
| 6396 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 6397 | Corner Operating Company, Inc | New York, NY 10165 | Oil & Gas Operator | Dec 1999 |
| 6398 | Cornerstone E & P Company LP | Irving, TX 75038 | Oil & Gas Operator | Nov 2010 |
| 6399 | Cornerstone Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Nov 2011 |
| 6400 | Cornerstone Energy, LLC | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |