| 5901 | Clothier, David W. | Eastborough, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 5902 | Cloud Peak Operating LLC | Casper, WY 82601 | Oil Operator | Aug 2024 |
| 5903 | Clovelly DRLG & Dev Co Inc | | Oil & Gas Operator | Oct 1983 |
| 5904 | Clovelly Oil Co. LLC | | Oil & Gas Operator | May 2024 |
| 5905 | Clovelly Oil Co., Inc. | | Oil & Gas Operator | Dec 2008 |
| 5906 | Clovelly Oil Co., Inc. - Ripco | | Oil & Gas Operator | Nov 1991 |
| 5907 | Clover Energy Corp | | Oil & Gas Operator | May 1980 |
| 5908 | Clover Oil Company | | Oil Operator | Jul 2024 |
| 5909 | Clover Production Company | Sourlake, TX 77659 | Oil & Gas Operator | Nov 2024 |
| 5910 | Clowser Well Service, Inc. | | Oil & Gas Operator | Dec 2021 |
| 5911 | CLR Gauging Corp. | Tuleta, TX 78162 | Oil & Gas Operator | Nov 2024 |
| 5912 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Nov 2024 |
| 5913 | CLS Interests, Incorporated | Austin, TX 78734 | Oil & Gas Operator | Jan 1997 |
| 5914 | CLS Petroleum Holdings LLC | Wichita Falls, TX 76308 | Oil Operator | Nov 2024 |
| 5915 | Clsog L.C. | Houston, TX 77024 | Gas Operator | Jun 2008 |
| 5916 | Clubine, Jim L. | Independence, KS 67301 | Oil Operator | May 2024 |
| 5917 | Clute Oil Corporation | Cherry Hills VIllage, CO 80113 | Oil & Gas Operator | Jul 2024 |
| 5918 | CLV Oil & Gas Inc | Tulsa, OK 74169-0713 | Oil & Gas Operator | Apr 2020 |
| 5919 | CLX Oil & Gas LLC | | Oil & Gas Operator | Feb 2005 |
| 5920 | Clyde G. Kissinger | | Oil Operator | Jun 1964 |
| 5921 | Clyde H & Rae M Peters | Waterford, PA 16441-8872 | Gas Operator | Dec 2007 |
| 5922 | Clyde Petroleum | | Oil & Gas Operator | Dec 1988 |
| 5923 | Clyde W. Jones | | Oil Operator | Sep 2003 |
| 5924 | Clydesdale Energy LLC | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Nov 2019 |
| 5925 | Clymar, Inc | New Lexington, OH 43764 | Oil & Gas Operator | Dec 1996 |
| 5926 | CM Exploration Company Inc. | | Oil & Gas Operator | Apr 2009 |
| 5927 | CM Oil Co., L.L.C. | | Oil Operator | Jul 2024 |
| 5928 | CM Production LLC | | Oil & Gas Operator | Aug 2020 |
| 5929 | CM TX Production, LLC | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2023 |
| 5930 | Cmint Productions LLC | Dallas, TX 75248-2643 | Oil Operator | Oct 2021 |
| 5931 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Nov 2024 |
| 5932 | Cmo Inc. | | Oil Operator | Sep 2024 |
| 5933 | Cmo LLC | Cleveland, OK 74020 | Oil & Gas Operator | Sep 2024 |
| 5934 | CMR Energy, L.P. | Houston, TX 77077 | Oil & Gas Operator | Nov 2024 |
| 5935 | CMR Operating LLC | Tulsa, OK 74135-2653 | Oil & Gas Operator | Jun 2018 |
| 5936 | CMS Energy Inc | Dallas, TX 75287 | Oil & Gas Operator | Aug 2024 |
| 5937 | CMS Nomeco Oil & Gas Co. | Jackson, MI 49201 | Oil & Gas Operator | Jan 2015 |
| 5938 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 5939 | CMT Oil & Gas Company Inc | Tulsa, OK 74133-6724 | Oil & Gas Operator | Jul 2024 |
| 5940 | CMT Operating LLC | Cleveland, OK 74020-0113 | Oil & Gas Operator | Mar 2015 |
| 5941 | CMW Oil Company | | Oil & Gas Operator | Dec 1976 |
| 5942 | CMX Inc Of Kansas | Wichita, KS 67206-2561 | Oil & Gas Operator | Sep 2024 |
| 5943 | CMX, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jul 2024 |
| 5944 | CN Operating Company | Drumright, OK 74030 | Oil & Gas Operator | Nov 1998 |
| 5945 | CNC Oil Co., Inc. | | Oil Operator | Aug 1991 |
| 5946 | CNG Development Co | | Oil & Gas Operator | Dec 2008 |
| 5947 | CNG Producing | New Orleans, LA 70112-6000 | Oil & Gas Operator | Jun 2000 |
| 5948 | CNG Producing Co.-Tulsa Div. | | Oil & Gas Operator | Jun 1986 |
| 5949 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 5950 | CNS Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2010 |
| 5951 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Sep 2024 |
| 5952 | Co Energy | Benbrook, TX 76126 | Oil & Gas Operator | Nov 2024 |
| 5953 | Co-Co Incorporat | | Oil Operator | Oct 1989 |
| 5954 | Co-Co Oil, Inc. | Lubbock, TX 79407 | Oil & Gas Operator | Aug 2003 |
| 5955 | Co-St Oil Operating Co Inc | Enid, OK 73706 | Oil & Gas Operator | Apr 1997 |
| 5956 | Co-Wil-Co, Incorporated | | Oil Operator | Dec 1990 |
| 5957 | Coachman Energy Operating Company LLC | Englewood, CO 80111 | Oil & Gas Operator | May 2024 |
| 5958 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 5959 | Coal Creek Minerals LLC | Northglenn, CO 80234 | Gas Operator | Feb 2012 |
| 5960 | Coal Gas Recovery II LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2017 |
| 5961 | Coal Gas Recovery LLC | Waynesburg, PA 15370-2330 | Gas Operator | Dec 2012 |
| 5962 | Coal Gas Recovery LP | Linthicum Heights, MD 21090-2227 | Gas Operator | Dec 2010 |
| 5963 | Coal Gas Transportation LLC | Cadiz, OH 43907 | Gas Operator | Dec 2016 |
| 5964 | Coal Oil & Gas Company | Ada, OK 74820 | Oil & Gas Operator | Sep 2024 |
| 5965 | Coal Oil Inc. | | Oil & Gas Operator | Dec 1997 |
| 5966 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 5967 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 5968 | Coaltech, Inc. | | Gas Operator | Jun 1993 |
| 5969 | Coast David | Bartlesville, OK 74006-0407 | Oil & Gas Operator | Sep 2024 |
| 5970 | Coast Exploration Co. | | Oil & Gas Operator | Nov 1997 |
| 5971 | Coast Petroleum Company | | Oil Operator | Nov 1998 |
| 5972 | Coast Supply Company LTD. | | Oil & Gas Operator | Dec 1991 |
| 5973 | Coastal Bend Petroleum Corp. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Dec 2002 |
| 5974 | Coastal Chem Inc | Midvale, UT 84047 | Oil & Gas Operator | Aug 2003 |
| 5975 | Coastal Derby Refining Co | Houston, TX 77046 | Oil Operator | Feb 1994 |
| 5976 | Coastal Expanse Oil & Gas | Austin, TX 78746 | Oil & Gas Operator | Nov 2024 |
| 5977 | Coastal Investments Inc. | El Campo, TX 77437 | Oil & Gas Operator | Nov 2024 |
| 5978 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 5979 | Coastal Minerals, Inc. | | Oil Operator | Aug 1991 |
| 5980 | Coastal New Mexico MGMT LLC | Carlsbad, NM 88220 | Oil & Gas Operator | Nov 2024 |
| 5981 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 5982 | Coastal Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 5983 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 5984 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 5985 | Coastal Petro Corp | Oil City, PA 16301-6327 | Oil & Gas Operator | Jul 2018 |
| 5986 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2024 |
| 5987 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | Nov 2024 |
| 5988 | Coastal Production Company, Inc. | El Campo, TX 77437 | Oil & Gas Operator | Aug 1995 |
| 5989 | Coastal Production Inc. | | Oil & Gas Operator | Aug 2000 |
| 5990 | Coastal Shoreline Corp. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Aug 2003 |
| 5991 | Coastal States & Emerald Oil | | Oil & Gas Operator | Dec 1979 |
| 5992 | Coastal States Gas Prod. Co. | | Oil & Gas Operator | Jun 1996 |
| 5993 | Coastland Operations, LLC | Dallas, TX 75287 | Oil & Gas Operator | Nov 2024 |
| 5994 | Coastline Exploration, Inc. | Stafford, TX 77477 | Oil & Gas Operator | Nov 2024 |
| 5995 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 5996 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 5997 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 5998 | Coats Energy, Inc. | Wichita, KS 67201 | Oil & Gas Operator | Jul 2024 |
| 5999 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Jul 2024 |
| 6000 | Cobalt Environmental Solutions LLC | Oklahoma City, OK 73101-0249 | Oil Operator | Jun 2019 |