| 5801 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Aug 2026 |
| 5802 | Clear Lake Oil Co. | | Oil Operator | Jan 2025 |
| 5803 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Aug 2026 |
| 5804 | Clearfield Energy Resources & Management Inc. | | Oil & Gas Operator | Dec 1998 |
| 5805 | Clearfork Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2011 |
| 5806 | Clearfork Petroleum Inc. (A) | Lubbock, TX 79408 | Oil & Gas Operator | Aug 2026 |
| 5807 | Clearfork Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 5808 | Clearly Petroleum, LLC | Houston, TX 77086 | Oil & Gas Operator | Jun 2020 |
| 5809 | Cleary Exploration LLC | Oklahoma City, OK 73112-7221 | Oil & Gas Operator | Oct 2014 |
| 5810 | Cleary Jo Anne | Saint Louis, OK 74866 | Oil Operator | Mar 2026 |
| 5811 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 5812 | Cleaver Loraine | | Oil Operator | Dec 1996 |
| 5813 | Cleaver, Loraine G. (Deceased) Estate | Iola, KS 66749 | Oil Operator | Nov 2009 |
| 5814 | Cleere Operating LLC | Shawnee, OK 74804-2610 | Oil Operator | Apr 2026 |
| 5815 | Clem Energy LLC | | Oil & Gas Operator | Dec 2021 |
| 5816 | Clements Energy, Inc. | | Oil & Gas Operator | Oct 1987 |
| 5817 | Clements Exploration Co | Oklahoma City, OK 73132-5922 | Oil & Gas Operator | Jan 2006 |
| 5818 | Clements Operating Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 5819 | Clements-B & MCK - Luffey | | Gas Operator | Apr 1979 |
| 5820 | Clemishire Don | Hominy, OK 74035 | Oil & Gas Operator | Apr 2026 |
| 5821 | Clemishire, Brian S | | Oil & Gas Operator | Nov 2014 |
| 5822 | Clemishire, Jerry L | | Oil & Gas Operator | Apr 2026 |
| 5823 | Clemishire, Mark E | | Oil Operator | Apr 2026 |
| 5824 | Clemons, Tony W. | Minden, LA 71055 | Oil & Gas Operator | Dec 2016 |
| 5825 | Clemshire Bob | Hominy, OK 74035 | Oil & Gas Operator | Apr 2026 |
| 5826 | Clemshire Drilling Company | Tulsa, OK 74105 | Oil Operator | Apr 2026 |
| 5827 | Clendening, John A | | Oil Operator | Dec 2021 |
| 5828 | Cleo Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 1997 |
| 5829 | Cleveland Oil & Gas | Wichita Falls, TX 76308 | Oil Operator | Aug 2026 |
| 5830 | Cleveland Oil Company,L.L.C.,The | Midland, TX 79702 | Oil & Gas Operator | Sep 1999 |
| 5831 | Cleveland Production Company | Summit, MS 39666 | Oil & Gas Operator | Jul 1999 |
| 5832 | Cleveland Rod & Tracy | Elmore City, OK 73433-9467 | Oil & Gas Operator | Jul 2023 |
| 5833 | Click Betty | Stigler, OK 74462-0081 | Oil & Gas Operator | Feb 2016 |
| 5834 | Click Corp | Monroe, LA 71207 | Oil & Gas Operator | Jan 2025 |
| 5835 | Click Energy Company | Houston, TX 77269 | Oil & Gas Operator | Aug 2026 |
| 5836 | Click Robert R | Dallas, TX 75231 | Oil & Gas Operator | Nov 1995 |
| 5837 | Clide Oil Corp. | Iraan, TX 79744 | Oil & Gas Operator | Nov 2015 |
| 5838 | Clifford & Scott McKeever | Clarksburg, PA 15725 | Gas Operator | Dec 2024 |
| 5839 | Clifford C. Or Mary A. Terry | Dadeville, AL 36853 | Oil Operator | Feb 2003 |
| 5840 | Clifford Resources Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Jul 2015 |
| 5841 | Cliffs Drilling Company | | Oil & Gas Operator | Dec 1984 |
| 5842 | Cliffs Oil And Gas Company | | Oil & Gas Operator | Oct 1997 |
| 5843 | Cliffwood Production Co. | Houston, TX 77090 | Oil & Gas Operator | Aug 2013 |
| 5844 | Clift Cary E | Chickasha, OK 73018-6305 | Oil & Gas Operator | Mar 2026 |
| 5845 | Clifton & Associates Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2020 |
| 5846 | Clifton Consulting Inc | Piedmont, OK 73078-0180 | Gas Operator | Apr 2026 |
| 5847 | Clifton Oil | Muenster, TX 76252 | Oil & Gas Operator | Mar 2006 |
| 5848 | Clifton, B.W. | Graham, TX 76450 | Oil & Gas Operator | Mar 2000 |
| 5849 | Clifton, Joe B. Exploration, Inc | Pauls Valley, OK 73075 | Oil & Gas Operator | Mar 2008 |
| 5850 | Climax Oil Co LLC | Comanche, OK 73529-7715 | Oil Operator | Apr 2026 |
| 5851 | Clinch Drilling Company | | Oil & Gas Operator | Jan 2000 |
| 5852 | Clindco Inc | Bartlesville, OK 74006-6213 | Oil & Gas Operator | Oct 2019 |
| 5853 | Cline Oil Inc | Bradford, PA 16701 | Oil & Gas Operator | Dec 2025 |
| 5854 | Cline Production Company | Billings, MT 59104 | Oil & Gas Operator | May 2026 |
| 5855 | Clint H. Woodington | | Oil Operator | Dec 1994 |
| 5856 | Clinton Bowers Estate | Manhatten, KS 66502 | Oil Operator | Dec 1998 |
| 5857 | Clinton Gas Marketing Inc | Columbus, OH 43214 | Oil & Gas Operator | Dec 1988 |
| 5858 | Clinton Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Apr 1980 |
| 5859 | Clinton Petroleum Co Inc | Randolph, OH 44265 | Oil & Gas Operator | Dec 2009 |
| 5860 | Clinton Producti | | Oil Operator | Dec 1989 |
| 5861 | Clinton Production, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Aug 2025 |
| 5862 | Clinton Public Works Authority | Clinton, OK 73601 | Oil & Gas Operator | May 2023 |
| 5863 | Clinton, Orville L., Jr. | Paola, KS 66071 | Oil Operator | Apr 2005 |
| 5864 | Clipper Operating Co., Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 2000 |
| 5865 | CLK Energy Partners, LLC | | Oil & Gas Operator | Aug 2018 |
| 5866 | CLM Oil Production Inc | Bartlesville, OK 74006-4417 | Oil & Gas Operator | Apr 2026 |
| 5867 | CLM Operating | Graham, TX 76450 | Oil & Gas Operator | Aug 2017 |
| 5868 | CLMX Energy LLC | | Oil Operator | Mar 2026 |
| 5869 | Cloer VIrgil R | Oklahoma City, OK 73121 | Oil & Gas Operator | Apr 1993 |
| 5870 | Clofas Case Oil Co. | | Oil & Gas Operator | Dec 2025 |
| 5871 | Close, Bryan H. | Shamrock, TX 79079 | Gas Operator | Aug 2026 |
| 5872 | Clothier, David W. | Eastborough, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 5873 | Cloud Peak Operating LLC | Casper, WY 82601 | Oil Operator | Jun 2026 |
| 5874 | Clovelly DRLG & Dev Co Inc | | Oil & Gas Operator | Oct 1983 |
| 5875 | Clovelly Oil Co. LLC | | Oil & Gas Operator | Nov 2024 |
| 5876 | Clovelly Oil Co., Inc. | | Oil & Gas Operator | Nov 2008 |
| 5877 | Clovelly Oil Co., Inc. - Ripco | | Oil & Gas Operator | Nov 1991 |
| 5878 | Clover Energy Corp | | Oil & Gas Operator | May 1980 |
| 5879 | Clover Oil Company | | Oil Operator | Mar 2026 |
| 5880 | Clover Production Company | Sourlake, TX 77659 | Oil & Gas Operator | Aug 2026 |
| 5881 | Clowser Well Service, Inc. | | Oil & Gas Operator | Dec 2021 |
| 5882 | CLR Gauging Corp. | Tuleta, TX 78162 | Oil & Gas Operator | Aug 2026 |
| 5883 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Aug 2026 |
| 5884 | CLS Interests, Incorporated | Austin, TX 78734 | Oil & Gas Operator | Jan 1997 |
| 5885 | CLS Petroleum Holdings LLC | Iowa Park, TX 76367 | Oil Operator | Aug 2026 |
| 5886 | Clsog L.C. | Houston, TX 77024 | Gas Operator | Jun 2008 |
| 5887 | Clubine, Jim L. | Independence, KS 67301 | Oil Operator | Jan 2026 |
| 5888 | Clute Oil Corporation | Cherry Hills VIllage, CO 80113 | Oil & Gas Operator | Apr 2026 |
| 5889 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 5890 | Clyde G. Kissinger | | Oil Operator | Jun 1964 |
| 5891 | Clyde H & Rae M Peters | Waterford, PA 16441-8872 | Gas Operator | Dec 2007 |
| 5892 | Clyde Petroleum | | Oil & Gas Operator | Dec 1988 |
| 5893 | Clyde W. Jones | | Oil Operator | Sep 2003 |
| 5894 | Clydesdale Energy LLC | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Nov 2019 |
| 5895 | Clymar, Inc | New Lexington, OH 43764 | Oil & Gas Operator | Dec 1996 |
| 5896 | CM Exploration Company Inc. | | Oil & Gas Operator | Apr 2009 |
| 5897 | CM Oil Co. | FT Stockton, TX 79735 | Oil & Gas Operator | Aug 2026 |
| 5898 | CM Oil Co., L.L.C. | | Oil Operator | Jan 2025 |
| 5899 | CM Production, LLC | | Oil & Gas Operator | Aug 2020 |
| 5900 | CM TX Production, LLC | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2023 |