| 6401 | Coppertop | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2026 |
| 6402 | Coppock Herb Energy | Fairview, OK 73737-1037 | Oil & Gas Operator | May 2018 |
| 6403 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 6404 | Coral Coast Petroleum, L.C. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 6405 | Coral E&P, LLC | Adkins, TX 78101 | Oil & Gas Operator | Aug 2026 |
| 6406 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Apr 2026 |
| 6407 | Corbell Wayne L | Arlinton, TX 76006 | Oil & Gas Operator | Apr 2023 |
| 6408 | Corbell, W. D. | Dublin, TX 76446 | Oil & Gas Operator | Dec 2001 |
| 6409 | Corda Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2026 |
| 6410 | Cordele Development Corporation | San Antonio, TX 78205 | Oil & Gas Operator | Aug 2026 |
| 6411 | Cordero Energy Operating LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2020 |
| 6412 | Cordero Mining Co | Gillette, WY 82717 | Oil Operator | Nov 2009 |
| 6413 | Cordero Oil And Gas LLC | Gillette, WY 82716 | Oil Operator | Nov 2021 |
| 6414 | Cordex Petroleums, Inc. | | Oil & Gas Operator | Jun 1996 |
| 6415 | Cordillera Corporation | Denver, CO 80237 | Oil & Gas Operator | Feb 1996 |
| 6416 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Apr 2026 |
| 6417 | Cordillera Energy Partners III LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Mar 2014 |
| 6418 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 6419 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 6420 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 6421 | Core Antrim Company LLC | | Gas Operator | Jun 2026 |
| 6422 | Core Appalachia Operating LLC | Charleston, WV 25362 | Oil & Gas Operator | Dec 2024 |
| 6423 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Aug 2026 |
| 6424 | Core Energy LLC | | Oil & Gas Operator | Jun 2026 |
| 6425 | Core Minerals Operating Co Inc | | Oil & Gas Operator | Dec 2024 |
| 6426 | Core Petro, LLC | Abilene, TX 79608 | Oil & Gas Operator | Aug 2026 |
| 6427 | Core Solutions LLC | | Oil & Gas Operator | Dec 2021 |
| 6428 | Corenergy Operating Group, LLC | Houston, TX 77074 | Oil & Gas Operator | Aug 2026 |
| 6429 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Aug 2026 |
| 6430 | Corfu Darien Properties, LLC | Corfu, NY 14036 | Gas Operator | Dec 2025 |
| 6431 | Corgray Holdings, LLC | Fulshear, TX 77441 | Gas Operator | Mar 2016 |
| 6432 | Corie Oil Co., Inc. | Russell, KS 67665 | Oil Operator | Feb 2003 |
| 6433 | Corie Oil Compan | | Oil Operator | Jul 1985 |
| 6434 | Corinne Grace | Carlsbad, NM 88220 | Oil & Gas Operator | Jan 2011 |
| 6435 | Corinthian Exploration (USA) Corp | | Oil & Gas Operator | Feb 2016 |
| 6436 | Cork Petroleum Corporation | Thermopolis, WY 82443 | Oil & Gas Operator | Apr 2012 |
| 6437 | Corkran Energy, LP | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 6438 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Aug 2026 |
| 6439 | Corley G R | | Oil & Gas Operator | Jun 2009 |
| 6440 | Corley Production Company | Wilson, OK 73463-7218 | Oil Operator | May 2026 |
| 6441 | Corley Production Inc | Comanche, OK 73529-4668 | Oil Operator | Mar 2015 |
| 6442 | Corley, Henry Oil Properties LLC | El Dorado, AR 71730 | Oil Operator | Jan 2025 |
| 6443 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 6444 | Cornelius Dale | Willow, OK 73673 | Oil Operator | Apr 2026 |
| 6445 | Cornelius Oil Company | Kellyville, OK 74039-0459 | Oil & Gas Operator | Jul 2015 |
| 6446 | Cornelius Oil Inc | Kellyville, OK 74039 | Oil & Gas Operator | Apr 2026 |
| 6447 | Cornelius Petroleum Inc | | Oil & Gas Operator | Apr 2026 |
| 6448 | Cornelius Phillip J & Connie | Kellyville, OK 74039 | Oil & Gas Operator | Dec 2000 |
| 6449 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | Apr 2026 |
| 6450 | Cornelius, Steven L | | Oil Operator | Sep 2015 |
| 6451 | Cornell Glen R | Pauls Valley, OK 73075-9606 | Oil & Gas Operator | Oct 2013 |
| 6452 | Cornell Oil Company | | Oil & Gas Operator | May 1985 |
| 6453 | Cornell Rich M - | | Oil & Gas Operator | May 1993 |
| 6454 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 6455 | Corner Operating Company, Inc | New York, NY 10165 | Oil & Gas Operator | Dec 1999 |
| 6456 | Cornerstone E & P Company LP | Irving, TX 75038 | Oil & Gas Operator | Nov 2010 |
| 6457 | Cornerstone Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Nov 2011 |
| 6458 | Cornerstone Energy, LLC | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 6459 | Cornerstone Gas Processing Inc | | Oil Operator | Jan 1999 |
| 6460 | Cornerstone Minerals LTD | | Oil & Gas Operator | Dec 2009 |
| 6461 | Cornerstone Mining, LLC | | Gas Operator | Sep 2019 |
| 6462 | Cornerstone Natural Gas Co. | | Oil Operator | Oct 1999 |
| 6463 | Cornerstone Natural Resources LLC | Denver, CO 80234 | Oil & Gas Operator | May 2026 |
| 6464 | Cornerstone Oil Trust | San Antonio, TX 78251 | Oil & Gas Operator | Jul 2003 |
| 6465 | Cornie Creek Corporation | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 6466 | Corning Oil Co Inc | Sonora, OH 43785 | Oil & Gas Operator | Dec 2002 |
| 6467 | Cornwell Well Service, Inc. | | Oil & Gas Operator | Feb 2010 |
| 6468 | Cornwell, G. G. | | Oil & Gas Operator | Sep 2009 |
| 6469 | Corona Development Co. Inc. | | Oil Operator | Dec 1989 |
| 6470 | Corona Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2026 |
| 6471 | Corona Operating, LLC | Midland, TX 79702 | Oil Operator | Aug 2026 |
| 6472 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 6473 | Coronado Energy Partners LLC | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2026 |
| 6474 | Coronado Great Plains LLC | Tulsa, OK 74137-2832 | Gas Operator | Apr 2013 |
| 6475 | Coronado Kansas, LLC | Tulsa, OK 74133 | Oil Operator | Oct 2009 |
| 6476 | Coronado Minerals, LLC | Houston, TX 77208 | Oil & Gas Operator | Aug 2026 |
| 6477 | Coronado Oil | Lindsborg, KS 67456 | Oil Operator | Sep 1985 |
| 6478 | Coronado Oil & G | | Oil Operator | Dec 1996 |
| 6479 | Coronado Oil & Gas, Inc. | Great Bend, KS 67530 | Oil Operator | Jul 2004 |
| 6480 | Coronado Oil & Minerals Co. | | Oil & Gas Operator | Sep 1980 |
| 6481 | Coronado Oil Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 6482 | Coronado Oil, Inc. | Salina, KS 67401 | Oil Operator | May 1990 |
| 6483 | Coronado Oklahoma LLC | Tulsa, OK 74133-7036 | Gas Operator | Apr 2020 |
| 6484 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Apr 2026 |
| 6485 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 6486 | Corpus Christi Leaseholds, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 1996 |
| 6487 | Corpus Christi Oil & Gas Co. | | Oil & Gas Operator | Dec 1991 |
| 6488 | Correll, Spencer | Perryton, TX 79070 | Oil & Gas Operator | Aug 2026 |
| 6489 | Corrida Oil Inc | Denver, CO 80217 | Oil & Gas Operator | Jun 1990 |
| 6490 | Corriente Operating Company LLC | Taft, TX 78390 | Oil & Gas Operator | Aug 2026 |
| 6491 | Corsa Resources, LLC | Kemah, TX 77565 | Oil & Gas Operator | Aug 2026 |
| 6492 | Corsair Energy, LC | Wichita, KS 67202 | Oil & Gas Operator | Apr 2004 |
| 6493 | Corsicana Crude Company, LLC | Denver, CO 80202 | Oil Operator | Aug 2026 |
| 6494 | Corsicana Crude Holdings, LLC | Denver, CO 80202 | Oil Operator | Aug 2026 |
| 6495 | Corsicana Field Fund | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1993 |
| 6496 | Corsicana Oil & Gas | Corsicana, TX 75151 | Oil Operator | Aug 2026 |
| 6497 | Cortam, Inc. | Augusta, KS 67010 | Oil Operator | Dec 2024 |
| 6498 | Corterra Energy Operating LLC | Tulsa, OK 74119-4844 | Oil & Gas Operator | Aug 2021 |
| 6499 | Cortex Energy, Inc. | Wichita, KS 67217 | Oil & Gas Operator | Dec 2024 |
| 6500 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |