| 6601 | Coomer, Mitchell | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 6602 | Coon Creek Gas Inc | | Oil & Gas Operator | Mar 2014 |
| 6603 | Coon Creek Transmission LLC | Barnsdall, OK 74002 | Oil & Gas Operator | May 2018 |
| 6604 | Coop Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 6605 | Cooper & Brain Inc. | | Oil & Gas Operator | Dec 2024 |
| 6606 | Cooper A L & Mae C | | Oil & Gas Operator | Jan 2001 |
| 6607 | Cooper Energy Corp | | Oil & Gas Operator | Jun 1995 |
| 6608 | Cooper John T | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 6609 | Cooper Lisa L | Cushing, OK 74023 | Oil & Gas Operator | Mar 2015 |
| 6610 | Cooper Mineral Group Inc | Bellaire, TX 77401 | Oil & Gas Operator | Feb 2004 |
| 6611 | Cooper Oil & Gas, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2010 |
| 6612 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 6613 | Cooper Oil Company | Andover, KS 67002 | Oil Operator | Oct 1997 |
| 6614 | Cooper Oil Inc | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 6615 | Cooper Operating | Olney, TX 76374 | Oil Operator | Apr 2007 |
| 6616 | Cooper Operating LLC | Yukon, OK 73099 | Oil & Gas Operator | Feb 2025 |
| 6617 | Cooper Production Company | New Braunfels, TX 78132 | Oil & Gas Operator | Sep 2021 |
| 6618 | Cooper Service Co. | | Oil & Gas Operator | Nov 2024 |
| 6619 | Cooper, Glenn W. Oil & Gas | Seymour, TX 76380 | Oil & Gas Operator | Feb 2000 |
| 6620 | Cooper, J. M. | Winfield, KS 67119 | Oil Operator | Oct 1997 |
| 6621 | Cooper, Lowell E. | Peabody, KS 66866 | Oil Operator | Nov 1987 |
| 6622 | Coors Energy | Golden, CO 80402-0467 | Oil & Gas Operator | Sep 1992 |
| 6623 | Coots, Jesse | Le Roy, NY 14482 | Gas Operator | Dec 2023 |
| 6624 | Copano Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 6625 | Copano Gas Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 6626 | Cope Oil Company | Valley VIew, TX 76272 | Oil & Gas Operator | Feb 2015 |
| 6627 | Copeland Gas LLC | Albion, PA 16401 | Gas Operator | Dec 2024 |
| 6628 | Copestone Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | Apr 2025 |
| 6629 | Copper Land Resources LLC | | Oil Operator | Feb 2025 |
| 6630 | Copper Ridge Oil Inc | Olean, NY 14760 | Oil & Gas Operator | Dec 2023 |
| 6631 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Feb 2025 |
| 6632 | Copperhead Creek Enterprises, Inc. | Chautauqua, KS 67334 | Oil Operator | Sep 2019 |
| 6633 | Copperhead Enterprises LLC | Ludlow, PA 16333-0057 | Oil & Gas Operator | Dec 2024 |
| 6634 | Copperhead Oil | Colony, KS 66015 | Oil Operator | Sep 1985 |
| 6635 | Copperhead Oil & Gas, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2017 |
| 6636 | Coppertop | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2025 |
| 6637 | Coppock Herb Energy | Fairview, OK 73737-1037 | Oil & Gas Operator | May 2018 |
| 6638 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 6639 | Coral Coast Petroleum, L.C. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 6640 | Coral E&P, LLC | Adkins, TX 78101 | Oil & Gas Operator | Apr 2025 |
| 6641 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Jan 2025 |
| 6642 | Corbell Wayne L | Fort Worth, TX 76111-4615 | Oil & Gas Operator | Apr 2023 |
| 6643 | Corbell, W. D. | Dublin, TX 76446 | Oil & Gas Operator | Dec 2001 |
| 6644 | Corda Corporation | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 2025 |
| 6645 | Cordele Development Corporation | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2025 |
| 6646 | Cordero Energy Operating LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2020 |
| 6647 | Cordero Mining Co | Gillette, WY 82717 | Oil Operator | Nov 2009 |
| 6648 | Cordero Oil And Gas LLC | Gillette, WY 82716 | Oil Operator | Nov 2021 |
| 6649 | Cordex Petroleums, Inc. | | Oil & Gas Operator | Jun 1996 |
| 6650 | Cordillera Corporation | Denver, CO 80237 | Oil & Gas Operator | Feb 1996 |
| 6651 | Cordillera Energy Partners II LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Jan 2025 |
| 6652 | Cordillera Energy Partners III LLC | Greenwood VIllage, CO 80111-2856 | Oil & Gas Operator | Mar 2014 |
| 6653 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 6654 | Cordillera Energy PRTNRS III,LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2012 |
| 6655 | Cordillera Texas, L.P. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Sep 2008 |
| 6656 | Core Appalachia Operating LLC | Charleston, WV 25362 | Oil & Gas Operator | Dec 2023 |
| 6657 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Apr 2025 |
| 6658 | Core Energy LLC | | Oil & Gas Operator | Jan 2025 |
| 6659 | Core Minerals Operating Co Inc | | Oil & Gas Operator | Dec 2023 |
| 6660 | Core Petro, LLC | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 6661 | Core Solutions LLC | | Oil & Gas Operator | Dec 2021 |
| 6662 | Corenergy Operating Group, LLC | Houston, TX 77074 | Oil & Gas Operator | Apr 2025 |
| 6663 | Coreterra Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Apr 2025 |
| 6664 | Corfu Darien Properties, LLC | Corfu, NY 14036 | Gas Operator | Dec 2023 |
| 6665 | Corgray Holdings, LLC | Fulshear, TX 77441 | Gas Operator | Mar 2016 |
| 6666 | Corie Oil Co., Inc. | Russell, KS 67665 | Oil Operator | Feb 2003 |
| 6667 | Corie Oil Compan | | Oil Operator | Jul 1985 |
| 6668 | Corinne Grace | Carlsbad, NM 88220 | Oil & Gas Operator | Jan 2011 |
| 6669 | Corinthian Exploration (USA) Corp | | Oil & Gas Operator | Apr 2016 |
| 6670 | Cork Petroleum Corporation | Thermopolis, WY 82443 | Oil & Gas Operator | Apr 2012 |
| 6671 | Corkran Energy, LP | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 6672 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2025 |
| 6673 | Corley G R | | Oil & Gas Operator | Jun 2009 |
| 6674 | Corley Production Company | Wilson, OK 73463-7218 | Oil Operator | Feb 2025 |
| 6675 | Corley Production Inc | Comanche, OK 73529-4668 | Oil Operator | Mar 2015 |
| 6676 | Corley, Henry Oil Properties LLC | El Dorado, AR 71730 | Oil Operator | Jan 2025 |
| 6677 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 6678 | Cornelius Dale | Willow, OK 73673 | Oil Operator | Jan 2025 |
| 6679 | Cornelius Oil Company | Kellyville, OK 74039-0459 | Oil & Gas Operator | Jul 2015 |
| 6680 | Cornelius Oil Inc | Kellyville, OK 74039 | Oil & Gas Operator | Jan 2025 |
| 6681 | Cornelius Petroleum Inc | Kellyville, OK 74039 | Oil & Gas Operator | Jan 2025 |
| 6682 | Cornelius Phillip J & Connie | Kellyville, OK 74039 | Oil & Gas Operator | Dec 2000 |
| 6683 | Cornelius Tony | Sapulpa, OK 74066-5845 | Oil & Gas Operator | Dec 2024 |
| 6684 | Cornell Glen R | Pauls Valley, OK 73075-9606 | Oil & Gas Operator | Oct 2013 |
| 6685 | Cornell Oil Company | | Oil & Gas Operator | May 1985 |
| 6686 | Cornell Rich M - | | Oil & Gas Operator | May 1993 |
| 6687 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 6688 | Corner Operating Company, Inc | New York, NY 10165 | Oil & Gas Operator | Dec 1999 |
| 6689 | Cornerstone E & P Company, LP | Irving, TX 75038 | Oil & Gas Operator | Nov 2010 |
| 6690 | Cornerstone Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Nov 2011 |
| 6691 | Cornerstone Energy, LLC | Magnolia, AR 71753 | Oil & Gas Operator | Oct 2024 |
| 6692 | Cornerstone Gas Processing Inc | | Oil Operator | Jan 1999 |
| 6693 | Cornerstone Minerals LTD | | Oil & Gas Operator | Dec 2009 |
| 6694 | Cornerstone Mining, LLC | | Gas Operator | Sep 2019 |
| 6695 | Cornerstone Natural Gas Co. | | Oil Operator | Oct 1999 |
| 6696 | Cornerstone Natural Resources LLC | Denver, CO 80234 | Oil & Gas Operator | Feb 2025 |
| 6697 | Cornerstone Oil Trust | San Antonio, TX 78251 | Oil & Gas Operator | Jul 2003 |
| 6698 | Cornie Creek Corporation | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 6699 | Corning Oil Co Inc | Sonora, OH 43785 | Oil & Gas Operator | Dec 2002 |
| 6700 | Cornwell Well Service, Inc. | | Oil & Gas Operator | Feb 2010 |