| 5801 | City Of Satanta | Satanta, KS 67870 | Gas Operator | Feb 2025 |
| 5802 | City Of Sunray Utilities | Sunray, TX 79086 | Oil & Gas Operator | Jun 2025 |
| 5803 | City Of White Deer | White Deer, TX 79097 | Gas Operator | May 2017 |
| 5804 | City Oil Corp. Oper. For | | Oil & Gas Operator | Dec 1989 |
| 5805 | Civego, Inc. | | Oil & Gas Operator | Jul 1994 |
| 5806 | Civic Energy Corporation | Colony, OK 73021 | Oil & Gas Operator | Mar 2025 |
| 5807 | Civiletto, George & Wendy | Fredonia, NY 14063 | Gas Operator | Dec 2023 |
| 5808 | Civitas North LLC | | Oil & Gas Operator | Apr 2025 |
| 5809 | Civitas Permian Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2025 |
| 5810 | Civron Petroleum Res., LLC | San Antonio, TX 78229 | Oil & Gas Operator | Jun 2025 |
| 5811 | CJ Oil Inc | Madison, KS 66860 | Oil Operator | Feb 2025 |
| 5812 | CJ Tejas Energy, LLC | Pearland, TX 77581 | Oil Operator | Jun 2025 |
| 5813 | CJR Operating LLC | Wister, OK 74966 | Gas Operator | Mar 2025 |
| 5814 | CJRW Oil & Gas | MC Camey, TX 79752 | Oil Operator | Jun 2025 |
| 5815 | CJW Operating Co. | Tucson, AZ 85718 | Oil Operator | Mar 2024 |
| 5816 | CK Oil | | Oil Operator | Aug 2024 |
| 5817 | CK Oil & Gas LLC | Herington, KS 67449 | Oil & Gas Operator | Dec 2023 |
| 5818 | CK Operating Company, LLC | Wichita Falls, TX 76308 | Oil Operator | Jun 2025 |
| 5819 | CK Resources | Cleveland, OK 74020-0772 | Oil Operator | Aug 2013 |
| 5820 | CK5 Services LLC | Zephyr, TX 76890 | Oil & Gas Operator | Jun 2025 |
| 5821 | CKB Corporation | Borger, TX 79008 | Oil & Gas Operator | Aug 1997 |
| 5822 | CKT Energy LLC | Dallas, TX 75379 | Oil & Gas Operator | Sep 2020 |
| 5823 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 5824 | Cla-Mar Oil Company, LLC | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 5825 | Claassen Oil And Gas, Inc. | Estes Park, CO 80517 | Oil & Gas Operator | Feb 2025 |
| 5826 | Claborn Julia | Okmulgee, OK 74447-9781 | Oil & Gas Operator | Mar 2022 |
| 5827 | Claco Oil Co | Artesia, NM 88210 | Oil & Gas Operator | Dec 2014 |
| 5828 | Claiborne-McDonald Inc | Chickasha, OK 73018 | Oil Operator | Jul 2007 |
| 5829 | Claibourn, Darrel R. | Neodesha, KS 66757 | Oil Operator | Oct 2011 |
| 5830 | Clair Oil, Inc. | Russell, KS 67665 | Oil Operator | Nov 2019 |
| 5831 | Clamp Operating | San Antonio, TX 78264 | Oil & Gas Operator | Apr 2002 |
| 5832 | Clamp Operating Incorporated | San Antonio, TX 78264 | Oil & Gas Operator | Mar 2011 |
| 5833 | Clapp Carl O | Cedar Vale, KS 67024 | Oil Operator | Aug 2013 |
| 5834 | Clapp Oil LLC | | Oil Operator | Feb 2025 |
| 5835 | Clarco Gas Co., Inc. | Westmont, IL 60559 | Oil Operator | Dec 2011 |
| 5836 | Claremont Corporation | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2017 |
| 5837 | Claremont Energy | | Gas Operator | Dec 1993 |
| 5838 | Claremont Exploration Inc | Tulsa, OK 74103-4107 | Oil & Gas Operator | Jun 1997 |
| 5839 | Clarence F. Routon, Jr. | | Oil Operator | Apr 1990 |
| 5840 | Clarence K Tussel Jr LTD | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2024 |
| 5841 | Clarence R. Barnett Inc. | | Oil & Gas Operator | Mar 2025 |
| 5842 | Clarita Operating LLC | Ada, OK 74821 | Oil Operator | Jun 2022 |
| 5843 | Clark And Clark | Princeton, NJ 08540-1930 | Oil & Gas Operator | Jul 2013 |
| 5844 | Clark B & Cahoj | | Oil Operator | Apr 1995 |
| 5845 | Clark Blake | | Gas Operator | Sep 2023 |
| 5846 | Clark Energy, LLC | Chanute, KS 66720 | Oil & Gas Operator | Jun 2022 |
| 5847 | Clark Exploratio | | Oil & Gas Operator | Jun 1991 |
| 5848 | Clark Exploration Co. | Highlands Ranch, CO 80126-7645 | Oil & Gas Operator | Nov 2024 |
| 5849 | Clark Krista | Ada, OK 74820-8595 | Oil Operator | Sep 2001 |
| 5850 | Clark Oil & Gas Inc | | Oil & Gas Operator | Dec 1990 |
| 5851 | Clark Oil Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2025 |
| 5852 | Clark Oil Producing Company | | Oil & Gas Operator | Oct 1979 |
| 5853 | Clark Oil, LLC | Wellsville, KS 66092 | Oil Operator | Apr 2022 |
| 5854 | Clark Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 5855 | Clark Operating Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 5856 | Clark Operating Services, Inc. | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 5857 | Clark Well Service | Depew, OK 74028-0296 | Oil & Gas Operator | Aug 2013 |
| 5858 | Clark Wells, LLC | St. Marys, WV 26170 | Gas Operator | Dec 2021 |
| 5859 | Clark, B. C. | Cross Plains, TX 76443 | Oil Operator | Dec 2007 |
| 5860 | Clark, Daniel J. | Auburn, NY 13021 | Gas Operator | Dec 2023 |
| 5861 | Clark, Daryl | Phillipsburg, KS 67661 | Oil Operator | Nov 2024 |
| 5862 | Clark, Donald E. | | Gas Operator | Dec 2003 |
| 5863 | Clark, Donald-Roger Young | | Oil & Gas Operator | Jan 1988 |
| 5864 | Clark, G. A., Trustee | San Antonio, TX 78210 | Oil & Gas Operator | Nov 2017 |
| 5865 | Clark, John M. | Midland, TX 79701 | Oil & Gas Operator | Dec 1993 |
| 5866 | Clark, John M., Inc. | Midland, TX 79704 | Oil & Gas Operator | Jun 2025 |
| 5867 | Clark, N.G. Dba Glenn, Inc | | Oil & Gas Operator | Dec 2021 |
| 5868 | Clark, Noel D. Et Al | | Oil & Gas Operator | Mar 1994 |
| 5869 | Clark, Richard E., Inc. | Longview, TX 75604 | Oil & Gas Operator | May 2001 |
| 5870 | Clark, Robert A. | Wichita, KS 67202 | Gas Operator | Jul 1990 |
| 5871 | Clarkco Services, Inc. | | Oil & Gas Operator | Sep 2024 |
| 5872 | Clarke Corporati | Medicine Lodge, KS 67104 | Oil & Gas Operator | Feb 2025 |
| 5873 | Clarkston Oil Co | | Oil Operator | Dec 2023 |
| 5874 | Clarkston Oil Corp | | Oil Operator | Dec 2023 |
| 5875 | Claron Corporation | Houston, TX 77219 | Oil & Gas Operator | Jun 2025 |
| 5876 | Class Oil | Hays, KS 67601 | Oil Operator | Jun 1991 |
| 5877 | Class Petroleum Corporation | Barnsdall, OK 74002 | Oil Operator | Aug 2013 |
| 5878 | Classic Energy Incorporated | Tyler, TX 75701 | Oil & Gas Operator | Jul 2005 |
| 5879 | Classic Oil & Gas Resources Inc | | Gas Operator | Dec 2008 |
| 5880 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 5881 | Classic Operating Co. LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 5882 | Classic Petroleum Partners, Inc. | Whitehouse, TX 75791 | Oil & Gas Operator | Jun 2025 |
| 5883 | Classic Well Service, Inc. | Claflin, KS 67525 | Oil Operator | Dec 2019 |
| 5884 | Claude Debeaux, Jr. Et Al | | Oil Operator | Dec 1999 |
| 5885 | Claude S. Hinds | | Oil Operator | Aug 1985 |
| 5886 | Claude-Maggie Co. | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 5887 | Clausen, A. G. | Cross Plains, TX 76443 | Oil & Gas Operator | Jun 2025 |
| 5888 | Clausing, Garry | Coffeyville, KS 67337 | Oil Operator | Apr 2024 |
| 5889 | Claussen Roy A & | | Oil Operator | Jun 1986 |
| 5890 | Clavo Oil, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 5891 | Clawson, Merle Eugene | McCune, KS 66753 | Oil Operator | Nov 2016 |
| 5892 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 5893 | Clay Investments LLC | Stillwater, OK 74075-3600 | Oil & Gas Operator | Jan 2021 |
| 5894 | Clay Oil & Gas Co | Zanesville, OH 43701 | Oil Operator | Dec 1991 |
| 5895 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 5896 | Clay, Charles E. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2010 |
| 5897 | Clay, Jerry H. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2006 |
| 5898 | Claybanks Oil Co LLC | | Oil Operator | Jun 2019 |
| 5899 | Claybrook Drilling Co Inc | | Oil & Gas Operator | Sep 2014 |
| 5900 | Claybrook Production Co. Inc. | Wewoka, OK 74884-1380 | Oil & Gas Operator | Jun 2014 |