| 6601 | Coronado Energy Partners LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 6602 | Coronado Great Plains LLC | Tulsa, OK 74137-2832 | Gas Operator | Apr 2013 |
| 6603 | Coronado Kansas, LLC | Tulsa, OK 74133 | Oil Operator | Oct 2009 |
| 6604 | Coronado Minerals, LLC | Houston, TX 77208 | Oil & Gas Operator | Jun 2025 |
| 6605 | Coronado Oil | Lindsborg, KS 67456 | Oil Operator | Sep 1985 |
| 6606 | Coronado Oil & G | | Oil Operator | Dec 1996 |
| 6607 | Coronado Oil & Gas, Inc. | Great Bend, KS 67530 | Oil Operator | Jul 2004 |
| 6608 | Coronado Oil & Minerals Co. | | Oil & Gas Operator | Sep 1980 |
| 6609 | Coronado Oil Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 6610 | Coronado Oil, Inc. | Salina, KS 67401 | Oil Operator | May 1990 |
| 6611 | Coronado Oklahoma LLC | Tulsa, OK 74133-7036 | Gas Operator | Apr 2020 |
| 6612 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Mar 2025 |
| 6613 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 6614 | Corpus Christi Leaseholds, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 1996 |
| 6615 | Corpus Christi Oil & Gas Co. | | Oil & Gas Operator | Dec 1991 |
| 6616 | Correll, Spencer | Perryton, TX 79070 | Oil & Gas Operator | Jun 2025 |
| 6617 | Corrida Oil Inc | Denver, CO 80217 | Oil & Gas Operator | Jun 1990 |
| 6618 | Corriente Operating Company LLC | Taft, TX 78390 | Oil & Gas Operator | Jun 2025 |
| 6619 | Corsa Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 6620 | Corsair Energy, LC | Wichita, KS 67202 | Oil & Gas Operator | Apr 2004 |
| 6621 | Corsicana Crude Company, LLC | Denver, CO 80202 | Oil Operator | Jun 2025 |
| 6622 | Corsicana Crude Holdings, LLC | Denver, CO 80202 | Oil Operator | Jun 2025 |
| 6623 | Corsicana Field Fund | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1993 |
| 6624 | Corsicana Oil & Gas | Corsicana, TX 75151 | Oil Operator | Jun 2025 |
| 6625 | Cortam, Inc. | Augusta, KS 67010 | Oil Operator | Dec 2024 |
| 6626 | Corterra Energy Operating LLC | Tulsa, OK 74119-4844 | Oil & Gas Operator | Aug 2021 |
| 6627 | Cortex Energy, Inc. | Wichita, KS 67217 | Oil & Gas Operator | Dec 2024 |
| 6628 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 6629 | Cortland Energy Co Inc | Worthington, OH 43085 | Oil & Gas Operator | Dec 2024 |
| 6630 | Corum Operating Company, LLC | Houston, TX 77055 | Oil & Gas Operator | Jun 2025 |
| 6631 | Corum Production Co.-Tepco | | Oil & Gas Operator | Dec 1989 |
| 6632 | Corum Production Company | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 6633 | Corvette Oil Corporation | Fort Worth, TX 76115 | Oil & Gas Operator | Mar 2008 |
| 6634 | Corwin, B. V. | Enid, OK 73701 | Oil & Gas Operator | Apr 2017 |
| 6635 | Cory, Kenneth W. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2012 |
| 6636 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Jun 2025 |
| 6637 | Coseka Resources USA LTD | Denver, CO 80202-1602 | Oil & Gas Operator | Jun 1988 |
| 6638 | Cosgriff Joe | Detroit, MI 48208 | Oil & Gas Operator | Dec 1998 |
| 6639 | Coshocton Pipe Co | Columbus, OH 43229 | Oil & Gas Operator | Dec 1989 |
| 6640 | Costa Energy, LLC | Irving, TX 75063 | Oil & Gas Operator | Jun 2025 |
| 6641 | Costa Loma LTD. | | Oil & Gas Operator | Mar 2025 |
| 6642 | Costa Resources, Inc. | Dallas, TX 75209 | Oil & Gas Operator | Aug 2003 |
| 6643 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 6644 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 6645 | Coteau Energy LLC | | Oil & Gas Operator | Dec 2024 |
| 6646 | Coterra Energy Inc | Pittsburgh, PA 15275-1121 | Oil & Gas Operator | Apr 2025 |
| 6647 | Coterra Energy Operating Co. | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 6648 | Coterra Energy Operating E LLC | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 6649 | Coterra Energy Operating F LLC | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 6650 | Coterra Energy Operating M LLC | Midland, TX 79706 | Oil & Gas Operator | Aug 2019 |
| 6651 | Cotiga Development Company, Limited Partnership | Williamson, WV 25661-0000 | Oil & Gas Operator | Dec 2021 |
| 6652 | Cotton County Ventures | Estes Park, CO 80517 | Oil Operator | Nov 2003 |
| 6653 | Cotton Petroleum | | Oil & Gas Operator | May 1988 |
| 6654 | Cotton Petroleum Corp/Apc | Denver, CO 80203-4549 | Oil & Gas Operator | Nov 1990 |
| 6655 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 6656 | Cotton Valley Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2000 |
| 6657 | Cotton Valley Operations, Inc. | Longview, TX 75608 | Oil & Gas Operator | Jun 2025 |
| 6658 | Cotton Valley Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2025 |
| 6659 | Cotton Well Drilling Co Inc | Sheridan, NY 14135 | Oil & Gas Operator | Dec 2023 |
| 6660 | Cotton, W. L. | Hebbronville, TX 78361 | Oil & Gas Operator | Mar 1996 |
| 6661 | Cotton, W.L. Gems & Minerals LTD | Hebbronville, TX 78361 | Oil & Gas Operator | May 2000 |
| 6662 | Cottonmouth SWD LLC | Tulsa, OK 74103-3522 | Oil Operator | Mar 2025 |
| 6663 | Cottonwood Oil C | | Oil & Gas Operator | Oct 1988 |
| 6664 | Cottonwood Oil Inc | Worland, WY 82401 | Oil & Gas Operator | Jun 1988 |
| 6665 | Cottonwood Opr Corp | Dubois, PA 15801-0403 | Gas Operator | Dec 1989 |
| 6666 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 6667 | Cottonwood Prod Co Inc | Buffalo, NY 14202-2212 | Gas Operator | Dec 2002 |
| 6668 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 6669 | Couch Donald W | Marlow, OK 73055 | Oil & Gas Operator | Apr 2025 |
| 6670 | Couch Fred J | Broken Arrow, OK 74012 | Oil Operator | Mar 2010 |
| 6671 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Jun 2025 |
| 6672 | Couch, Gilbert | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 6673 | Couch, Harry L. | Odessa, TX 79762 | Oil & Gas Operator | Nov 1994 |
| 6674 | Cougar Energies, Inc. | Oberlin, KS 67749 | Oil Operator | Jun 1996 |
| 6675 | Cougar Energy Inc | Oil City, PA 16301-4046 | Oil & Gas Operator | Dec 2013 |
| 6676 | Cougar Energy Investment LLC | Spring, TX 77387-7277 | Oil & Gas Operator | Sep 2014 |
| 6677 | Cougar Exploration, Inc. | | Oil & Gas Operator | Jun 1988 |
| 6678 | Cougar Oil | | Oil Operator | Feb 2025 |
| 6679 | Cougar Oil & Gas Co., Inc. | Houston, TX 77269 | Oil & Gas Operator | Mar 2008 |
| 6680 | Cougar Oil, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Jun 2009 |
| 6681 | Coughlin, Daniel L | | Oil Operator | Aug 2000 |
| 6682 | Coulthurst MGT & Inv Inc | Reno, NV 89504 | Oil Operator | Sep 2020 |
| 6683 | Council Oak Resources LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Apr 2025 |
| 6684 | Country Boy Oil Co Inc | | Oil Operator | Nov 2017 |
| 6685 | Country Side Sand & Gravel, Inc | Collins, NY 14034 | Gas Operator | Dec 2023 |
| 6686 | Countrymark Energy Resources, LLC | MT Vernon, IN 47620 | Oil & Gas Operator | Dec 2023 |
| 6687 | County Line Resources LLC | Lancaster, TX 75146 | Oil Operator | Jun 2025 |
| 6688 | County Line Stone Co., Inc. | Akron, NY 14001 | Gas Operator | Dec 2023 |
| 6689 | County Line Stripper Wells LLC | Chelsea, OK 74016 | Oil & Gas Operator | Mar 2025 |
| 6690 | County Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 1993 |
| 6691 | Countyline Production Co LLC | Duncan, OK 73533 | Oil Operator | Apr 2025 |
| 6692 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 6693 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2025 |
| 6694 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 6695 | Courtland City Lights Assoc. | | Oil Operator | Dec 2005 |
| 6696 | Courtney Oil Co. | | Oil Operator | Dec 1998 |
| 6697 | Courtwright Management, Inc. | Bridgeport, WV 26330 | Gas Operator | Dec 2021 |
| 6698 | Coushatta Oil & Gas Inc. | | Oil & Gas Operator | Jan 2007 |
| 6699 | Cousins Exploration Co | Wichita Falls, TX 76307 | Oil Operator | Jun 1991 |
| 6700 | Covalent Exploration Incorporated | Houston, TX 77079 | Oil Operator | Jun 2025 |