| 5701 | Clark Exploratio | | Oil & Gas Operator | Jun 1991 |
| 5702 | Clark Exploration Company | Highlands Ranch, CO 80126-7645 | Oil & Gas Operator | Jul 2024 |
| 5703 | Clark Krista | Ada, OK 74820-8595 | Oil Operator | Sep 2001 |
| 5704 | Clark Oil & Gas Inc | | Oil & Gas Operator | Dec 1990 |
| 5705 | Clark Oil Co. | Dallas, TX 75360 | Oil & Gas Operator | Sep 2026 |
| 5706 | Clark Oil Producing Company | | Oil & Gas Operator | Oct 1979 |
| 5707 | Clark Oil, LLC | Wellsville, KS 66092 | Oil Operator | Apr 2022 |
| 5708 | Clark Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 5709 | Clark Operating Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 5710 | Clark Operating Services Inc | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 5711 | Clark Well Service | Depew, OK 74028-0296 | Oil & Gas Operator | Aug 2013 |
| 5712 | Clark, B. C. | Cross Plains, TX 76443 | Oil Operator | Dec 2007 |
| 5713 | Clark, Daniel J. | Auburn, NY 13021 | Gas Operator | Dec 2025 |
| 5714 | Clark, Daryl | Phillipsburg, KS 67661 | Oil Operator | May 2026 |
| 5715 | Clark, Donald E. | | Gas Operator | Dec 2003 |
| 5716 | Clark, Donald-Roger Young | | Oil & Gas Operator | Jan 1988 |
| 5717 | Clark, G. A., Trustee | San Antonio, TX 78210 | Oil & Gas Operator | Nov 2017 |
| 5718 | Clark, John M. | Midland, TX 79701 | Oil & Gas Operator | Dec 1993 |
| 5719 | Clark, John M., Inc. | Midland, TX 79704 | Oil & Gas Operator | Sep 2026 |
| 5720 | Clark, N.G. Dba Glenn, Inc | | Oil & Gas Operator | Dec 2021 |
| 5721 | Clark, Noel D. Et Al | | Oil & Gas Operator | Mar 1994 |
| 5722 | Clark, Richard E., Inc. | Longview, TX 75604 | Oil & Gas Operator | May 2001 |
| 5723 | Clark, Robert A. | Wichita, KS 67202 | Gas Operator | Jul 1990 |
| 5724 | Clarkco Services, Inc. | | Oil & Gas Operator | May 2026 |
| 5725 | Clarke Corporati | Medicine Lodge, KS 67104 | Oil & Gas Operator | May 2026 |
| 5726 | Clarkston Oil Co | | Oil Operator | Dec 2025 |
| 5727 | Clarkston Oil Corp | | Oil Operator | Dec 2025 |
| 5728 | Claron Corporation | Houston, TX 77219 | Oil & Gas Operator | Sep 2026 |
| 5729 | Class Oil | Hays, KS 67601 | Oil Operator | Jun 1991 |
| 5730 | Class Petroleum Corporation | Barnsdall, OK 74002 | Oil Operator | Aug 2013 |
| 5731 | Classic Energy Incorporated | Tyler, TX 75701 | Oil & Gas Operator | Jul 2005 |
| 5732 | Classic Oil & Gas Resources Inc | | Gas Operator | Dec 2008 |
| 5733 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 5734 | Classic Operating Co. LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 5735 | Classic Petroleum Partners, Inc. | Whitehouse, TX 75791 | Oil & Gas Operator | Sep 2026 |
| 5736 | Classic Well Service, Inc. | Claflin, KS 67525 | Oil Operator | Dec 2019 |
| 5737 | Claude Debeaux, Jr. Et Al | | Oil Operator | Dec 1999 |
| 5738 | Claude S. Hinds | | Oil Operator | Aug 1985 |
| 5739 | Claude-Maggie Co. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 5740 | Clausen, A. G. | Cross Plains, TX 76443 | Oil & Gas Operator | Sep 2026 |
| 5741 | Clausing, Garry | Coffeyville, KS 67337 | Oil Operator | Apr 2024 |
| 5742 | Claussen Roy A & | | Oil Operator | Jun 1986 |
| 5743 | Clavo Oil, LLC | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 5744 | Clawson, Merle Eugene | McCune, KS 66753 | Oil Operator | Nov 2016 |
| 5745 | Clay A Muegge | | Oil & Gas Operator | Jul 2026 |
| 5746 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 5747 | Clay Investments LLC | Stillwater, OK 74075-3600 | Oil & Gas Operator | Jan 2021 |
| 5748 | Clay Oil & Gas Co | Zanesville, OH 43701 | Oil Operator | Dec 1991 |
| 5749 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 5750 | Clay, Charles E. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2010 |
| 5751 | Clay, Jerry H. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2006 |
| 5752 | Claybanks Oil Co LLC | | Oil Operator | Jun 2019 |
| 5753 | Claybrook Drilling Co Inc | | Oil & Gas Operator | Sep 2014 |
| 5754 | Claybrook Production Co. Inc. | Wewoka, OK 74884-1380 | Oil & Gas Operator | Jun 2014 |
| 5755 | Clayton Corp Petro & Natural Gas Prod | Lakewood, CO 80228-1836 | Oil & Gas Operator | Oct 2020 |
| 5756 | Clayton Corp Petro & NTRL Gas Prodn | Lakewood, CO 80228 | Oil & Gas Operator | Dec 2009 |
| 5757 | Clayton Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 5758 | Clayton Investment | Farmington, NM 87401 | Oil & Gas Operator | Jun 1995 |
| 5759 | Clayton Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | May 2004 |
| 5760 | Clayton W. Williams, Jr. | | Oil & Gas Operator | Sep 1986 |
| 5761 | Clayton W. Williams, Jr., Inc. | | Oil & Gas Operator | May 1993 |
| 5762 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 5763 | CLC Operations Inc | Midland, TX 79701 | Oil & Gas Operator | Mar 1997 |
| 5764 | Clean Energy Exploration & Production LLC | Norristown, PA 19403 | Gas Operator | Jun 2026 |
| 5765 | Clean Energy Systems Placerita Inc. | | Oil & Gas Operator | Dec 2025 |
| 5766 | Clean Gas, Inc | Hindman, KY 41822 | Oil & Gas Operator | Dec 2023 |
| 5767 | Clean Oil LLC | Ada, OK 74820 | Oil & Gas Operator | Jun 2026 |
| 5768 | Cleantex Oilfield Services, LLC | Tyler, TX 75702 | Oil Operator | Sep 2026 |
| 5769 | Clear Brooke Ranches, LLC | Fort Worth, TX 76179 | Oil & Gas Operator | Sep 2026 |
| 5770 | Clear Creek Energy LLC | Seneca Rocks, WV 26884 | Oil & Gas Operator | Dec 2021 |
| 5771 | Clear Creek Exploration LLC | Fredonia, KS 66736 | Gas Operator | Apr 2011 |
| 5772 | Clear Creek Oil Co | Nova, OH 44859 | Oil & Gas Operator | Dec 2018 |
| 5773 | Clear Creek Royalty LLC | Tulsa, OK 74137 | Oil & Gas Operator | Jul 2023 |
| 5774 | Clear Fork Gas Company | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 5775 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 5776 | Clear Lake Oil Co. | | Oil Operator | Jan 2025 |
| 5777 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 5778 | Clearfield Energy Resources & Management Inc. | | Oil & Gas Operator | Dec 1998 |
| 5779 | Clearfork Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2011 |
| 5780 | Clearfork Petroleum Inc. (A) | Lubbock, TX 79408 | Oil & Gas Operator | Sep 2026 |
| 5781 | Clearfork Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 5782 | Clearly Petroleum, LLC | Houston, TX 77086 | Oil & Gas Operator | Jun 2020 |
| 5783 | Cleary Exploration LLC | Oklahoma City, OK 73112-7221 | Oil & Gas Operator | Oct 2014 |
| 5784 | Cleary Jo Anne | Saint Louis, OK 74866 | Oil Operator | May 2026 |
| 5785 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 5786 | Cleaver Loraine | | Oil Operator | Dec 1996 |
| 5787 | Cleaver, Loraine G. (Deceased) Estate | Iola, KS 66749 | Oil Operator | Nov 2009 |
| 5788 | Cleere Operating LLC | Shawnee, OK 74804-2610 | Oil Operator | Jun 2026 |
| 5789 | Clem Energy LLC | Weston, WV 26452 | Oil & Gas Operator | Dec 2021 |
| 5790 | Clements Energy, Inc. | | Oil & Gas Operator | Oct 1987 |
| 5791 | Clements Exploration Co | Oklahoma City, OK 73132-5922 | Oil & Gas Operator | Jan 2006 |
| 5792 | Clements Operating Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 5793 | Clements-B & MCK - Luffey | | Gas Operator | Apr 1979 |
| 5794 | Clemishire Don | Hominy, OK 74035 | Oil & Gas Operator | Jun 2026 |
| 5795 | Clemishire, Brian S | | Oil & Gas Operator | Nov 2014 |
| 5796 | Clemishire, Jerry L | | Oil & Gas Operator | Jun 2026 |
| 5797 | Clemishire, Mark E | | Oil Operator | Jun 2026 |
| 5798 | Clemons, Tony W. | Minden, LA 71055 | Oil & Gas Operator | Dec 2016 |
| 5799 | Clemshire Bob | Hominy, OK 74035 | Oil & Gas Operator | Jun 2026 |
| 5800 | Clemshire Drilling Company | Tulsa, OK 74105 | Oil Operator | Jun 2026 |