| 4901 | Canyon Operating Unit | San Angelo, TX 76904 | Oil & Gas Operator | Sep 1995 |
| 4902 | Canyon Reef Brine LLC | Snyder, TX 79550 | Oil Operator | Apr 2025 |
| 4903 | Canyon Ridge Energy LLC | Iowa Park, TX 76367 | Oil Operator | Nov 2024 |
| 4904 | Cap Energy LLC | Greeley, CO 80634 | Oil & Gas Operator | Aug 2019 |
| 4905 | Cap Oil Company | Ada, OK 74820 | Oil Operator | Dec 2024 |
| 4906 | Cap Operating Inc. | Borger, TX 79008 | Oil & Gas Operator | Apr 2025 |
| 4907 | Cap Production | | Oil Operator | Dec 2024 |
| 4908 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 4909 | Capco Offshore Of Texas, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 4910 | Capco Offshore, Inc. | Irving, TX 75063 | Oil & Gas Operator | May 2012 |
| 4911 | Capco Resource Corporation | Orange,, CA 92869 | Oil Operator | Sep 2007 |
| 4912 | Capco Resources Corporation | Irving, TX 75016 | Oil & Gas Operator | Mar 2004 |
| 4913 | Capco Resources Of Texas, Inc | Irving, TX 75063 | Oil & Gas Operator | Jun 2003 |
| 4914 | Cape Oil Associates | | Oil & Gas Operator | Sep 1997 |
| 4915 | Cape Operating, Inc. | Longview, TX 75608 | Oil & Gas Operator | Nov 2007 |
| 4916 | Cape, Randy | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 4917 | Capio Oil & Gas, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2015 |
| 4918 | Capital A Corp. | San Antonio, TX 78279 | Oil & Gas Operator | Jun 2002 |
| 4919 | Capital Energy Group, Inc. | Bardonia, NY 10954 | Oil Operator | Jan 1998 |
| 4920 | Capital Energy, LLC | Ripley, WV 25271 | Oil & Gas Operator | Dec 2021 |
| 4921 | Capital Gas, Inc. | | Gas Operator | Jan 1998 |
| 4922 | Capital Oil & Gas Inc | Austintown, OH 44515-3033 | Oil & Gas Operator | Dec 2024 |
| 4923 | Capital Pet & Investments Inc | Oklahoma City, OK 73102-7400 | Oil & Gas Operator | Mar 2015 |
| 4924 | Capital Production Company | | Oil Operator | Dec 1997 |
| 4925 | Capital Programs Company Inc | Addison, TX 75001-6030 | Oil Operator | Jul 2021 |
| 4926 | Capital Resource Management Inc | Austin, TX 78716 | Oil & Gas Operator | May 1999 |
| 4927 | Capital Star Oil & Gas, Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2025 |
| 4928 | Capitan Energy, Incorporated | Carlsbad, NM 88221 | Oil & Gas Operator | Apr 2025 |
| 4929 | Capitan Operating LLC | Reno, NV 89502 | Oil & Gas Operator | Jan 2013 |
| 4930 | Capitol Oil & Gas Corporation | Centennial, WY 82055 | Oil Operator | Feb 2006 |
| 4931 | Capitol Oil Corporation | | Oil & Gas Operator | Dec 2024 |
| 4932 | Capitol Operating & Expl., Inc. | Austin, TX 78766 | Oil & Gas Operator | Feb 2001 |
| 4933 | Capitol Operating Group, LLC | Lafayette, LA 70503-5334 | Oil & Gas Operator | Feb 2025 |
| 4934 | Capitol Well Servicing Co., Inc. | Oklahoma City, OK 73143 | Oil & Gas Operator | May 2023 |
| 4935 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 4936 | Capp Petroleum, LLC | Ashland, KY 41105 | Oil & Gas Operator | Dec 2020 |
| 4937 | Cappellino, Nancy J. & Marina A. | Arcade, NY 14009 | Gas Operator | Dec 2023 |
| 4938 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 4939 | Caprock Drilling & Operating Co Inc | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 4940 | Caprock Energy, Inc. | Denton, TX 76205 | Oil & Gas Operator | Apr 1993 |
| 4941 | Caprock Engineering, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Nov 2018 |
| 4942 | Caprock Exploration, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Apr 2025 |
| 4943 | Caprock Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2007 |
| 4944 | Caprock, Inc. | Ralls, TX 79357 | Oil & Gas Operator | Mar 2013 |
| 4945 | Capstone Cactus Operating Comp. | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2025 |
| 4946 | Capstone Natural Res II, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 4947 | Capstone Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2015 |
| 4948 | Capstone Oil & Gas LLC | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 4949 | Capstone Oil Producing LLC | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2024 |
| 4950 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742 | Oil Operator | Dec 2019 |
| 4951 | Captain'S Oil Inc. | Louisburg, KS 66053 | Oil Operator | Sep 2003 |
| 4952 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | Apr 2025 |
| 4953 | Car-Tex Producing Company | | Oil & Gas Operator | Dec 1994 |
| 4954 | Cara Ventures In | | Oil Operator | May 1995 |
| 4955 | Carageannis, Paul C | Attica, KS 67009 | Oil Operator | Feb 2001 |
| 4956 | Caravel Energy O | | Oil & Gas Operator | Feb 1987 |
| 4957 | Caraway Operating Co. | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2025 |
| 4958 | Caraway, Robert | Cisco, TX 76437 | Oil & Gas Operator | Apr 2025 |
| 4959 | Caraway, Robert R. | Cisco, TX 76437 | Oil & Gas Operator | Apr 2025 |
| 4960 | Carbon California Operating Company LLC | | Oil & Gas Operator | Dec 2024 |
| 4961 | Carbon Creek Energy LLC | Sheridan, WY 82801 | Oil & Gas Operator | Jan 2025 |
| 4962 | Carbon Economy LLC | Chickasha, OK 73023 | Oil & Gas Operator | Feb 2025 |
| 4963 | Carbon Energy Corporation (USA) | Denver, CO 80290 | Oil & Gas Operator | Jul 2004 |
| 4964 | Carbon Field Energy, L.L.C. | Kilgore, TX 75663 | Oil Operator | Apr 2019 |
| 4965 | Carbon Oil Inc | Vidor, TX 77670 | Oil & Gas Operator | Apr 2025 |
| 4966 | Carbon Ridge Energy LLC | Norman, OK 73069 | Oil & Gas Operator | Feb 2025 |
| 4967 | Carburante Exploration Co, LTD. | Granbury, TX 76048 | Oil & Gas Operator | Apr 2025 |
| 4968 | Card Operating Company, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Dec 1995 |
| 4969 | Carder Oil Company | | Oil & Gas Operator | Dec 2024 |
| 4970 | Cardinal & Great Plains & Kaufman | | Oil Operator | Apr 1985 |
| 4971 | Cardinal Drilling Co. | | Oil Operator | Jan 2007 |
| 4972 | Cardinal Energy | | Oil & Gas Operator | Dec 2008 |
| 4973 | Cardinal Energy Company | Rowlett, TX 75088 | Oil & Gas Operator | Apr 2025 |
| 4974 | Cardinal Energy LLC | | Oil & Gas Operator | Dec 2021 |
| 4975 | Cardinal Expl And Prod | | Oil & Gas Operator | May 2019 |
| 4976 | Cardinal Oil & Gas, Inc. | | Oil & Gas Operator | Jun 1995 |
| 4977 | Cardinal Oil Company, Inc. | | Oil Operator | Dec 2023 |
| 4978 | Cardinal Oil LLC | Drumright, OK 74030-5820 | Oil & Gas Operator | Jan 2025 |
| 4979 | Cardinal Operating Corporation | Waxahachie, TX 75165 | Oil & Gas Operator | Jan 1997 |
| 4980 | Cardinal Petroleum Co. | | Oil & Gas Operator | May 2004 |
| 4981 | Cardinal Petroleum Corp Of La | | Oil Operator | May 2003 |
| 4982 | Cardinal Producing Co. | Abilene, TX 79606 | Oil & Gas Operator | Aug 2003 |
| 4983 | Cardinal River Operating LLC | Oklahoma City, OK 73102-7109 | Oil & Gas Operator | Jan 2025 |
| 4984 | Cardinal Shares, Inc. | West Bloomfld, MI 48322 | Oil & Gas Operator | Mar 2004 |
| 4985 | Cardinal Wyoming LLC | | Oil & Gas Operator | Feb 2025 |
| 4986 | Cardneaux Inc. | | Oil & Gas Operator | Aug 2009 |
| 4987 | Cardona, LLC | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2025 |
| 4988 | Cardwell Oil Corporation | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 4989 | Cardwell'S U Bar Oil | Manor, TX 78653 | Oil & Gas Operator | Apr 2025 |
| 4990 | Carey Gas Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 1999 |
| 4991 | Carey Resources Inc | Great Neck, NY 11023 | Oil & Gas Operator | Dec 1988 |
| 4992 | Carey, Shirley L. Trust | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 4993 | Cargas Operating Company | | Oil & Gas Operator | Dec 2024 |
| 4994 | Caribbean Energy LLC II | Cotulla, TX 78014 | Oil & Gas Operator | Apr 2025 |
| 4995 | Caribbean Energy, L.L.C. | Cotulla, TX 78014 | Oil & Gas Operator | Nov 2019 |
| 4996 | Caribbean Oil & Gas Corp | | Oil & Gas Operator | Mar 1980 |
| 4997 | Caribe Production Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 1993 |
| 4998 | Caribe Resources, Inc. | | Oil & Gas Operator | Jan 1985 |
| 4999 | Caribou Operating Co. | Granbury, TX 76048 | Oil & Gas Operator | Mar 2010 |
| 5000 | Caribou Operating, Inc. | Granbury, TX 76048 | Oil & Gas Operator | Apr 2025 |