| 6501 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 6502 | Coronado Energy Partners LLC | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2024 |
| 6503 | Coronado Great Plains LLC | Tulsa, OK 74137-2832 | Gas Operator | Apr 2013 |
| 6504 | Coronado Kansas, LLC | Tulsa, OK 74133 | Oil Operator | Oct 2009 |
| 6505 | Coronado Minerals, LLC | Houston, TX 77208 | Oil & Gas Operator | Nov 2024 |
| 6506 | Coronado Oil | Lindsborg, KS 67456 | Oil Operator | Sep 1985 |
| 6507 | Coronado Oil & G | | Oil Operator | Dec 1996 |
| 6508 | Coronado Oil & Gas, Inc. | Great Bend, KS 67530 | Oil Operator | Jul 2004 |
| 6509 | Coronado Oil & Minerals Co. | | Oil & Gas Operator | Sep 1980 |
| 6510 | Coronado Oil Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 6511 | Coronado Oil, Inc. | Salina, KS 67401 | Oil Operator | May 1990 |
| 6512 | Coronado Oklahoma LLC | Tulsa, OK 74133-7036 | Gas Operator | Apr 2020 |
| 6513 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Aug 2024 |
| 6514 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 6515 | Corpus Christi Leaseholds, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 1996 |
| 6516 | Corpus Christi Oil & Gas Co. | | Oil & Gas Operator | Dec 1991 |
| 6517 | Correll, Spencer | Perryton, TX 79070 | Oil & Gas Operator | Nov 2024 |
| 6518 | Corrida Oil Inc | Denver, CO 80217 | Oil & Gas Operator | Jun 1990 |
| 6519 | Corriente Operating Company LLC | Taft, TX 78390 | Oil & Gas Operator | Nov 2024 |
| 6520 | Corsa Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 6521 | Corsair Energy, LC | Wichita, KS 67202 | Oil & Gas Operator | Apr 2004 |
| 6522 | Corsicana Crude Company, LLC | Denver, CO 80202 | Oil Operator | Nov 2024 |
| 6523 | Corsicana Crude Holdings, LLC | Denver, CO 80202 | Oil Operator | Nov 2024 |
| 6524 | Corsicana Field Fund | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1993 |
| 6525 | Corsicana Oil & Gas | Corsicana, TX 75151 | Oil Operator | Nov 2024 |
| 6526 | Cortam, Inc. | Augusta, KS 67010 | Oil Operator | Jul 2024 |
| 6527 | Corterra Energy Operating LLC | Tulsa, OK 74119-4844 | Oil & Gas Operator | Aug 2021 |
| 6528 | Cortex Energy, Inc. | Wichita, KS 67217 | Oil & Gas Operator | Jun 2024 |
| 6529 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 6530 | Cortland Energy Co Inc | Cortland, OH 44410 | Oil & Gas Operator | Dec 2023 |
| 6531 | Corum Operating Company, LLC | Houston, TX 77055 | Oil & Gas Operator | Nov 2024 |
| 6532 | Corum Production Co.-Tepco | | Oil & Gas Operator | Dec 1989 |
| 6533 | Corum Production Company | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 6534 | Corvette Oil Corporation | Fort Worth, TX 76115 | Oil & Gas Operator | Mar 2008 |
| 6535 | Corvin Craig | Jenks, OK 74037-0516 | Oil Operator | Feb 2012 |
| 6536 | Corwin, B. V. | Enid, OK 73701 | Oil & Gas Operator | Apr 2017 |
| 6537 | Cory, Kenneth W. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2012 |
| 6538 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Nov 2024 |
| 6539 | Coseka Resources USA LTD | Denver, CO 80202-1602 | Oil & Gas Operator | Jun 1988 |
| 6540 | Cosgriff Joe | Detroit, MI 48208 | Oil & Gas Operator | Dec 1998 |
| 6541 | Coshocton Pipe Co | Columbus, OH 43229 | Oil & Gas Operator | Dec 1989 |
| 6542 | Costa Energy, LLC | Irving, TX 75063 | Oil & Gas Operator | Nov 2024 |
| 6543 | Costa Loma LTD. | | Oil & Gas Operator | Aug 2024 |
| 6544 | Costa Resources, Inc. | Dallas, TX 75209 | Oil & Gas Operator | Aug 2003 |
| 6545 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 6546 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 6547 | Coteau Energy LLC | | Oil & Gas Operator | Jun 2024 |
| 6548 | Coterra Energy Inc | Pittsburgh, PA 15275-1121 | Oil & Gas Operator | Sep 2024 |
| 6549 | Cotiga Development Company, Limited Partnership | Williamson, WV 25661-0000 | Oil & Gas Operator | Dec 2021 |
| 6550 | Cotton County Ventures | Estes Park, CO 80517 | Oil Operator | Nov 2003 |
| 6551 | Cotton Petroleum Corp/Apc | Denver, CO 80203-4549 | Oil & Gas Operator | Nov 1990 |
| 6552 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 6553 | Cotton Valley Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2000 |
| 6554 | Cotton Valley Operations, Inc. | Longview, TX 75608 | Oil & Gas Operator | Nov 2024 |
| 6555 | Cotton Valley Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 6556 | Cotton Well Drilling Co Inc | Sheridan, NY 14135 | Oil & Gas Operator | Dec 2023 |
| 6557 | Cotton, W. L. | Hebbronville, TX 78361 | Oil & Gas Operator | Mar 1996 |
| 6558 | Cotton, W.L. Gems & Minerals LTD | Hebbronville, TX 78361 | Oil & Gas Operator | May 2000 |
| 6559 | Cottonmouth SWD LLC | Tulsa, OK 74103-3522 | Oil Operator | Aug 2024 |
| 6560 | Cottonwood Oil C | | Oil & Gas Operator | Oct 1988 |
| 6561 | Cottonwood Oil Inc | Worland, WY 82401 | Oil & Gas Operator | Jun 1988 |
| 6562 | Cottonwood Opr Corp | Dubois, PA 15801-0403 | Gas Operator | Dec 1989 |
| 6563 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 6564 | Cottonwood Prod Co Inc | Buffalo, NY 14202-2212 | Gas Operator | Dec 2002 |
| 6565 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 6566 | Cottrell Gas, LLC | Meade, KS 67864 | Gas Operator | Jul 2024 |
| 6567 | Couch Donald W | Marlow, OK 73055-5252 | Oil & Gas Operator | Sep 2024 |
| 6568 | Couch Fred J | Broken Arrow, OK 74012 | Oil Operator | Mar 2010 |
| 6569 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Nov 2024 |
| 6570 | Couch, Gilbert | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 6571 | Couch, Harry L. | Odessa, TX 79762 | Oil & Gas Operator | Nov 1994 |
| 6572 | Cougar Energies, Inc. | Oberlin, KS 67749 | Oil Operator | Jun 1996 |
| 6573 | Cougar Energy Inc | Oil City, PA 16301-4046 | Oil & Gas Operator | Dec 2013 |
| 6574 | Cougar Energy Investment LLC | Spring, TX 77387-7277 | Oil & Gas Operator | Sep 2014 |
| 6575 | Cougar Exploration, Inc. | | Oil & Gas Operator | Jun 1988 |
| 6576 | Cougar Oil & Gas Co., Inc. | Houston, TX 77269 | Oil & Gas Operator | Mar 2008 |
| 6577 | Cougar Oil, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Jun 2009 |
| 6578 | Coughlin Daniel | El Reno, OK 73036 | Oil Operator | Aug 2000 |
| 6579 | Coulthurst MGT & Inv Inc | Reno, NV 89504 | Oil Operator | Sep 2020 |
| 6580 | Council Oak Resources LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Sep 2024 |
| 6581 | Country Boy Oil Co Inc | | Oil Operator | Nov 2017 |
| 6582 | Country Side Sand & Gravel, Inc | Collins, NY 14034 | Gas Operator | Dec 2023 |
| 6583 | Countrymark Energy Resources, LLC | MT Vernon, IN 47620 | Oil & Gas Operator | Dec 2022 |
| 6584 | County Line Resources LLC | Lancaster, TX 75146 | Oil Operator | Nov 2024 |
| 6585 | County Line Stone Co., Inc. | Akron, NY 14001 | Gas Operator | Dec 2023 |
| 6586 | County Line Stripper Wells LLC | Chelsea, OK 74016 | Oil & Gas Operator | Jun 2024 |
| 6587 | County Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 1993 |
| 6588 | Countyline Production Co LLC | Duncan, OK 73533 | Oil Operator | Sep 2024 |
| 6589 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 6590 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Nov 2024 |
| 6591 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 6592 | Courtland City Lights Assoc. | | Oil Operator | Dec 2005 |
| 6593 | Courtney Oil Co. | | Oil Operator | Dec 1998 |
| 6594 | Courtwright Management, Inc. | Bridgeport, WV 26330 | Gas Operator | Dec 2021 |
| 6595 | Coushatta Oil & Gas Inc. | | Oil & Gas Operator | Jan 2007 |
| 6596 | Cousins Exploration Co | Wichita Falls, TX 76307 | Oil Operator | Jun 1991 |
| 6597 | Covalent Exploration Incorporated | Houston, TX 77079 | Oil Operator | Nov 2024 |
| 6598 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 6599 | Covenant Oil & Gas, L.P. | Houston, TX 77057 | Oil & Gas Operator | Dec 2006 |
| 6600 | Covenant Oil Company | Houma, LA 70360 | Oil & Gas Operator | Dec 2015 |