| 4901 | Caprock Energy, Inc. | Denton, TX 76205 | Oil & Gas Operator | Apr 1993 |
| 4902 | Caprock Engineering, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2018 |
| 4903 | Caprock Exploration, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Dec 2025 |
| 4904 | Caprock Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2007 |
| 4905 | Caprock, Inc. | Ralls, TX 79357 | Oil & Gas Operator | Mar 2013 |
| 4906 | Capstone Cactus Operating Comp. | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 4907 | Capstone Natural Res II, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 4908 | Capstone Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2015 |
| 4909 | Capstone Oil & Gas LLC | Hennessey, OK 73742 | Oil & Gas Operator | Oct 2025 |
| 4910 | Capstone Oil Producing LLC | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2024 |
| 4911 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742 | Oil Operator | Dec 2019 |
| 4912 | Captain'S Oil Inc. | Louisburg, KS 66053 | Oil Operator | Sep 2003 |
| 4913 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | Dec 2025 |
| 4914 | Car-Tex Producing Company | | Oil & Gas Operator | Dec 1994 |
| 4915 | Cara Ventures In | | Oil Operator | May 1995 |
| 4916 | Carageannis, Paul C | Attica, KS 67009 | Oil Operator | Feb 2001 |
| 4917 | Caravel Energy O | | Oil & Gas Operator | Feb 1987 |
| 4918 | Caraway Operating Co. | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2025 |
| 4919 | Caraway, Robert | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 4920 | Caraway, Robert R. | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 4921 | Carbon California Operating Company LLC | | Oil & Gas Operator | Oct 2025 |
| 4922 | Carbon Creek Energy LLC | Sheridan, WY 82801 | Oil & Gas Operator | Sep 2025 |
| 4923 | Carbon Economy LLC | Chickasha, OK 73023 | Oil & Gas Operator | Oct 2025 |
| 4924 | Carbon Energy Corporation (USA) | Denver, CO 80290 | Oil & Gas Operator | Jul 2004 |
| 4925 | Carbon Field Energy, L.L.C. | Kilgore, TX 75663 | Oil Operator | Apr 2019 |
| 4926 | Carbon Oil Inc | Vidor, TX 77670 | Oil & Gas Operator | Dec 2025 |
| 4927 | Carbon Ridge Energy LLC | Norman, OK 73069 | Oil & Gas Operator | Oct 2025 |
| 4928 | Carburante Exploration Co, LTD. | Granbury, TX 76048 | Oil & Gas Operator | Dec 2025 |
| 4929 | Card Operating Company, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Dec 1995 |
| 4930 | Carder Oil Company | | Oil & Gas Operator | Dec 2024 |
| 4931 | Cardinal & Great Plains & Kaufman | | Oil Operator | Apr 1985 |
| 4932 | Cardinal Drilling Co. | | Oil Operator | Jan 2007 |
| 4933 | Cardinal Energy | | Oil & Gas Operator | Dec 2008 |
| 4934 | Cardinal Energy Company | Rowlett, TX 75088 | Oil & Gas Operator | Dec 2025 |
| 4935 | Cardinal Expl And Prod | | Oil & Gas Operator | May 2019 |
| 4936 | Cardinal Oil & Gas, Inc. | | Oil & Gas Operator | Jun 1995 |
| 4937 | Cardinal Oil Company, Inc. | | Oil Operator | Dec 2024 |
| 4938 | Cardinal Oil LLC | Drumright, OK 74030 | Oil & Gas Operator | Oct 2025 |
| 4939 | Cardinal Operating Corporation | Waxahachie, TX 75165 | Oil & Gas Operator | Jan 1997 |
| 4940 | Cardinal Petroleum Co. | | Oil & Gas Operator | May 2004 |
| 4941 | Cardinal Petroleum Corp Of La | | Oil Operator | May 2003 |
| 4942 | Cardinal Producing Co. | Abilene, TX 79606 | Oil & Gas Operator | Aug 2003 |
| 4943 | Cardinal River Operating LLC | Oklahoma City, OK 73102-7109 | Oil & Gas Operator | Sep 2025 |
| 4944 | Cardinal Shares, Inc. | West Bloomfld, MI 48322 | Oil & Gas Operator | Mar 2004 |
| 4945 | Cardinal Wyoming LLC | | Oil & Gas Operator | Sep 2025 |
| 4946 | Cardneaux Inc | | Oil & Gas Operator | Aug 2009 |
| 4947 | Cardwell Oil Corporation | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 4948 | Cardwell'S U Bar Oil | Manor, TX 78653 | Oil & Gas Operator | Dec 2025 |
| 4949 | Carey Gas Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 1999 |
| 4950 | Carey Resources Inc | Great Neck, NY 11023 | Oil & Gas Operator | Dec 1988 |
| 4951 | Carey, Shirley L. Trust | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 4952 | Cargas Operating Company | | Oil & Gas Operator | Dec 2024 |
| 4953 | Caribbean Energy LLC II | Cotulla, TX 78014 | Oil & Gas Operator | Dec 2025 |
| 4954 | Caribbean Energy, L.L.C. | Cotulla, TX 78014 | Oil & Gas Operator | Nov 2019 |
| 4955 | Caribbean Oil & Gas Corp | | Oil & Gas Operator | Mar 1980 |
| 4956 | Caribe Production Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 1993 |
| 4957 | Caribe Resources, Inc. | | Oil & Gas Operator | Jan 1985 |
| 4958 | Caribou Operating Co. | Granbury, TX 76048 | Oil & Gas Operator | Mar 2010 |
| 4959 | Caribou Operating, Inc. | Granbury, TX 76048 | Oil & Gas Operator | Dec 2025 |
| 4960 | Carken LLC | Andrews, TX 79714 | Oil Operator | Dec 2025 |
| 4961 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 4962 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 4963 | Carl E Smith Petroleum Inc | Dallas, TX 75234-6057 | Oil & Gas Operator | Dec 2019 |
| 4964 | Carl E. Hansford | | Oil Operator | Oct 1980 |
| 4965 | Carl Humphries Inc | Piedmont, OK 73078-0514 | Oil & Gas Operator | Oct 2025 |
| 4966 | Carl Oil & Gas Co. | Bakersfield, CA 93309 | Oil & Gas Operator | Dec 1995 |
| 4967 | Carl Oil & Gas Co.-CNG | | Oil & Gas Operator | Dec 1995 |
| 4968 | Carl P. Roppolo, Jr. | | Oil & Gas Operator | Mar 1991 |
| 4969 | Carl Schellinger | Roswell,, NM 88201 | Oil & Gas Operator | May 2010 |
| 4970 | Carl W Jones Et Al | | Oil & Gas Operator | Jul 1995 |
| 4971 | Carl Weaver Properties | | Oil & Gas Operator | Dec 1987 |
| 4972 | Carl, William E. | Corpus Christi, TX 78471 | Oil Operator | Jul 1986 |
| 4973 | Carla Energy Corporation | Oklahoma City, OK 73154-1487 | Oil & Gas Operator | Nov 2014 |
| 4974 | Carless Resources Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1997 |
| 4975 | Carlin Oil & Gas | | Oil Operator | Jan 1994 |
| 4976 | Carlin Oil And Gas Company | Tulsa, OK 74101-1019 | Oil & Gas Operator | May 1992 |
| 4977 | Carlon Oil & Gas Co Inc | Derby, KS 67037 | Gas Operator | Dec 2024 |
| 4978 | Carloran Production Corp | Windthorst, TX 76389 | Oil & Gas Operator | Dec 2025 |
| 4979 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 4980 | Carlson Oil Inc. | | Oil & Gas Operator | Oct 2008 |
| 4981 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 4982 | Carlton Oil Corp | Newport, OH 45768 | Oil & Gas Operator | Dec 2013 |
| 4983 | Carlton, Richard L | | Oil & Gas Operator | Aug 1999 |
| 4984 | Carlton, Wayne Inc. | Bronte, TX 76933 | Oil & Gas Operator | Dec 2002 |
| 4985 | Carmac Energy Company LLC | Shawnee, OK 74804 | Oil Operator | Aug 2025 |
| 4986 | Carmac Energy Corporation | Dallas, TX 75219-2311 | Oil & Gas Operator | Sep 2025 |
| 4987 | Carman C Wilford | | Oil & Gas Operator | Jan 2007 |
| 4988 | Carman Frances J | Pawhuska, OK 74056-0101 | Oil & Gas Operator | Aug 2013 |
| 4989 | Carman Robert W | Bristow, OK 74010-3454 | Oil & Gas Operator | Sep 2025 |
| 4990 | Carmel Energy, Inc. | | Oil Operator | Dec 2009 |
| 4991 | Carmen Field LP | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2008 |
| 4992 | Carmen Schmitt, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2025 |
| 4993 | Carmet Oil, Inc. | | Oil & Gas Operator | Dec 1990 |
| 4994 | Carmichael Oil & Gas Company | Vallejo, CA 94591-5653 | Oil & Gas Operator | Apr 2014 |
| 4995 | Carnegie Natural Gas Co | Pittsburgh, PA 15236-1435 | Gas Operator | Dec 1991 |
| 4996 | Carnegie Production Co | Charleston, WV 25328 | Oil & Gas Operator | Dec 2017 |
| 4997 | Carneros Energy Inc. | | Oil & Gas Operator | Dec 2004 |
| 4998 | Carnes Crude Oil Reclaiming Industry | | Oil Operator | Dec 2019 |
| 4999 | Carnes Petroleum Corporation | Cleveland, OK 74020 | Oil & Gas Operator | May 2020 |
| 5000 | Carney A B | | Oil & Gas Operator | Jan 2014 |