| 4901 | Cardinal Oil Company, Inc. | | Oil Operator | Dec 2024 |
| 4902 | Cardinal Oil LLC | Drumright, OK 74030 | Oil & Gas Operator | Dec 2025 |
| 4903 | Cardinal Operating Corporation | Waxahachie, TX 75165 | Oil & Gas Operator | Jan 1997 |
| 4904 | Cardinal Petroleum Co. | | Oil & Gas Operator | May 2004 |
| 4905 | Cardinal Petroleum Corp Of La | | Oil Operator | May 2003 |
| 4906 | Cardinal Producing Co. | Abilene, TX 79606 | Oil & Gas Operator | Aug 2003 |
| 4907 | Cardinal River Operating LLC | Oklahoma City, OK 73102-7109 | Oil & Gas Operator | Dec 2025 |
| 4908 | Cardinal Shares, Inc. | West Bloomfld, MI 48322 | Oil & Gas Operator | Mar 2004 |
| 4909 | Cardinal Wyoming LLC | | Oil & Gas Operator | Jan 2026 |
| 4910 | Cardneaux Inc | | Oil & Gas Operator | Aug 2009 |
| 4911 | Cardwell Oil Corporation | Midland, TX 79710 | Oil & Gas Operator | Mar 2026 |
| 4912 | Cardwell'S U Bar Oil | Manor, TX 78653 | Oil & Gas Operator | Mar 2026 |
| 4913 | Carey Gas Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 1999 |
| 4914 | Carey Resources Inc | Great Neck, NY 11023 | Oil & Gas Operator | Dec 1988 |
| 4915 | Carey, Shirley L. Trust | Abilene, TX 79608 | Oil & Gas Operator | Mar 2026 |
| 4916 | Cargas Operating Company | | Oil & Gas Operator | Dec 2024 |
| 4917 | Caribbean Energy LLC II | Cotulla, TX 78014 | Oil & Gas Operator | Mar 2026 |
| 4918 | Caribbean Energy, L.L.C. | Cotulla, TX 78014 | Oil & Gas Operator | Nov 2019 |
| 4919 | Caribbean Oil & Gas Corp | | Oil & Gas Operator | Mar 1980 |
| 4920 | Caribe Production Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 1993 |
| 4921 | Caribe Resources, Inc. | | Oil & Gas Operator | Jan 1985 |
| 4922 | Caribou Operating Co. | Granbury, TX 76048 | Oil & Gas Operator | Mar 2010 |
| 4923 | Caribou Operating, Inc. | Granbury, TX 76048 | Oil & Gas Operator | Mar 2026 |
| 4924 | Carken LLC | Andrews, TX 79714 | Oil Operator | Mar 2026 |
| 4925 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 4926 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 4927 | Carl E Smith Petroleum Inc | Dallas, TX 75234-6057 | Oil & Gas Operator | Dec 2019 |
| 4928 | Carl E. Hansford | | Oil Operator | Oct 1980 |
| 4929 | Carl Humphries Inc | Piedmont, OK 73078-0514 | Oil & Gas Operator | Jan 2026 |
| 4930 | Carl Oil & Gas Co. | Bakersfield, CA 93309 | Oil & Gas Operator | Dec 1995 |
| 4931 | Carl Oil & Gas Co.-CNG | | Oil & Gas Operator | Dec 1995 |
| 4932 | Carl P. Roppolo, Jr. | | Oil & Gas Operator | Mar 1991 |
| 4933 | Carl Schellinger | Roswell,, NM 88201 | Oil & Gas Operator | May 2010 |
| 4934 | Carl W Jones Et Al | | Oil & Gas Operator | Jul 1995 |
| 4935 | Carl Weaver Properties | | Oil & Gas Operator | Dec 1987 |
| 4936 | Carl, William E. | Corpus Christi, TX 78471 | Oil Operator | Jul 1986 |
| 4937 | Carla Energy Corporation | Oklahoma City, OK 73154-1487 | Oil & Gas Operator | Nov 2014 |
| 4938 | Carless Resources Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1997 |
| 4939 | Carlin Oil & Gas | | Oil Operator | Jan 1994 |
| 4940 | Carlin Oil And Gas Company | Tulsa, OK 74101-1019 | Oil & Gas Operator | May 1992 |
| 4941 | Carlon Oil & Gas Co Inc | Derby, KS 67037 | Gas Operator | Dec 2025 |
| 4942 | Carloran Production Corp | Windthorst, TX 76389 | Oil & Gas Operator | Mar 2026 |
| 4943 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 4944 | Carlson Oil Inc. | | Oil & Gas Operator | Oct 2008 |
| 4945 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 4946 | Carlton Oil Corp | Newport, OH 45768 | Oil & Gas Operator | Dec 2013 |
| 4947 | Carlton, Richard L | | Oil & Gas Operator | Aug 1999 |
| 4948 | Carlton, Wayne Inc. | Bronte, TX 76933 | Oil & Gas Operator | Dec 2002 |
| 4949 | Carmac Energy Company LLC | Shawnee, OK 74804 | Oil Operator | Dec 2025 |
| 4950 | Carmac Energy Corporation | Dallas, TX 75219-2311 | Oil & Gas Operator | Dec 2025 |
| 4951 | Carman C Wilford | | Oil & Gas Operator | Jan 2007 |
| 4952 | Carman Frances J | Pawhuska, OK 74056-0101 | Oil & Gas Operator | Aug 2013 |
| 4953 | Carman Robert W | Bristow, OK 74010-3454 | Oil & Gas Operator | Dec 2025 |
| 4954 | Carmel Energy, Inc. | | Oil Operator | Dec 2009 |
| 4955 | Carmen Field LP | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2008 |
| 4956 | Carmen Schmitt, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Sep 2025 |
| 4957 | Carmet Oil, Inc. | | Oil & Gas Operator | Dec 1990 |
| 4958 | Carmichael Oil & Gas Company | Vallejo, CA 94591-5653 | Oil & Gas Operator | Apr 2014 |
| 4959 | Carnegie Natural Gas Co | Pittsburgh, PA 15236-1435 | Gas Operator | Dec 1991 |
| 4960 | Carnegie Production Co | Charleston, WV 25328 | Oil & Gas Operator | Dec 2017 |
| 4961 | Carneros Energy Inc. | | Oil & Gas Operator | Dec 2004 |
| 4962 | Carnes Crude Oil Reclaiming Industry | | Oil Operator | Dec 2019 |
| 4963 | Carnes Oil LLC | Russell Springs, KY 42642 | Oil Operator | Dec 2020 |
| 4964 | Carnes Petroleum Corporation | Cleveland, OK 74020 | Oil & Gas Operator | May 2020 |
| 4965 | Carney A B | | Oil & Gas Operator | Jan 2014 |
| 4966 | Carney Mark C & Karen M | Dallas, TX 75206-4010 | Oil & Gas Operator | Oct 1994 |
| 4967 | Caroden Energy LLC | Wake Forest, NC 27587 | Oil Operator | Sep 2025 |
| 4968 | Caroil, LLC | Odessa, TX 79761 | Oil Operator | Mar 2026 |
| 4969 | Carol Rhodabarger Heitz | | Oil & Gas Operator | Dec 1996 |
| 4970 | Carol S Pultorak & Ra A Pultorak | Waynesburg, PA 15370-2434 | Gas Operator | Dec 2018 |
| 4971 | Carol-Holly Oil Corporation | Denver, CO 80237 | Oil & Gas Operator | Jan 2026 |
| 4972 | Caroline Hunt Schoellkopf | | Oil & Gas Operator | Aug 1987 |
| 4973 | Caroline Hunt Trust Estate | | Oil & Gas Operator | Mar 1987 |
| 4974 | Carolynn Clark Wiggin Oil Properties | Farmington, NM 874990420 | Oil & Gas Operator | Sep 2011 |
| 4975 | Carotex Energy, Inc. | Wilson, NC 27893 | Oil & Gas Operator | Aug 2003 |
| 4976 | Carpco Efficient Energy Co., LLC | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2026 |
| 4977 | Carpenter Corporation | Sourlake, TX 77659 | Oil & Gas Operator | Oct 1994 |
| 4978 | Carpenter Luther | Skiatook, OK 74070-9124 | Oil & Gas Operator | Dec 2025 |
| 4979 | Carpenter R L | Sapulpa, OK 74067-0452 | Oil Operator | Mar 2007 |
| 4980 | Carpenter Services | Colorado City, TX 79512 | Oil & Gas Operator | May 1996 |
| 4981 | Carper Ruth A& Henthorn Jr W D | Pataskala, OH 43062 | Oil & Gas Operator | Dec 2024 |
| 4982 | Carper Well Service Inc. | Reno, OH 45773 | Oil & Gas Operator | Dec 2023 |
| 4983 | Carr Exploration | | Oil & Gas Operator | Sep 1993 |
| 4984 | Carr Exploration Corp. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 4985 | Carr Petroleum, Inc. | | Oil Operator | Apr 1987 |
| 4986 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2026 |
| 4987 | Carr Well Service Inc | Odessa, TX 79769 | Oil & Gas Operator | Nov 1996 |
| 4988 | Carraway Co. | | Oil Operator | Apr 2006 |
| 4989 | Carrell Oil Company Dba Coco | Laurel, MT 59044 | Oil Operator | Jul 2020 |
| 4990 | Carrera Energy LLC | Midland, TX 79704-5036 | Oil & Gas Operator | Nov 2025 |
| 4991 | Carrie Exploration & Development, LLC | Hays, KS 67601 | Oil & Gas Operator | Dec 2019 |
| 4992 | Carriero, Pamela A. | Angola, NY 14006 | Gas Operator | Dec 2024 |
| 4993 | Carrizo (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jan 2020 |
| 4994 | Carrizo (Marcellus) LLC | Houston, TX 77002-5018 | Gas Operator | Jun 2019 |
| 4995 | Carrizo (Permian) LLC | Houston, TX 77042 | Oil & Gas Operator | Jan 2020 |
| 4996 | Carrizo (Utica) LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2017 |
| 4997 | Carrizo Exploration, Inc. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Aug 2016 |
| 4998 | Carrizo Niobrara LLC | | Oil & Gas Operator | Jun 2017 |
| 4999 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2026 |
| 5000 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Mar 2026 |