| 5901 | Co-St Oil Operating Co Inc | Enid, OK 73706 | Oil & Gas Operator | Apr 1997 |
| 5902 | Co-Wil-Co, Incorporated | | Oil Operator | Dec 1990 |
| 5903 | Coachman Energy Operating Co, LLC | Englewood, CO 80111 | Oil Operator | May 2024 |
| 5904 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 5905 | Coal Creek Minerals LLC | Northglenn, CO 80234 | Gas Operator | Feb 2012 |
| 5906 | Coal Gas Recovery II LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2017 |
| 5907 | Coal Gas Recovery LLC | | Gas Operator | Dec 2012 |
| 5908 | Coal Gas Recovery LP | Linthicum Heights, MD 21090-2227 | Gas Operator | Dec 2010 |
| 5909 | Coal Gas Transportation LLC | Cadiz, OH 43907 | Gas Operator | Dec 2016 |
| 5910 | Coal Oil & Gas Company | Ada, OK 74820 | Oil & Gas Operator | Jul 2026 |
| 5911 | Coal Oil Inc. | | Oil & Gas Operator | Dec 1997 |
| 5912 | Coaleum Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jan 2001 |
| 5913 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 5914 | Coaltech, Inc. | | Gas Operator | Jun 1993 |
| 5915 | Coast David | Bartlesville, OK 74006-0407 | Oil & Gas Operator | Jun 2026 |
| 5916 | Coast Exploration Co. | | Oil & Gas Operator | Nov 1997 |
| 5917 | Coast Supply Company LTD. | | Oil & Gas Operator | Dec 1991 |
| 5918 | Coastal Bend Petroleum Corp. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Dec 2002 |
| 5919 | Coastal Chem Inc | Midvale, UT 84047 | Oil & Gas Operator | Aug 2003 |
| 5920 | Coastal Expanse Oil & Gas | Austin, TX 78704 | Oil & Gas Operator | Sep 2026 |
| 5921 | Coastal Investments Inc. | El Campo, TX 77437 | Oil & Gas Operator | Sep 2026 |
| 5922 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 5923 | Coastal Minerals, Inc. | | Oil Operator | Aug 1991 |
| 5924 | Coastal New Mexico MGMT LLC | Carlsbad, NM 88220 | Oil & Gas Operator | Sep 2026 |
| 5925 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 5926 | Coastal Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 5927 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 5928 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 5929 | Coastal Petro Corp | Oil City, PA 16301-6327 | Oil & Gas Operator | Jul 2018 |
| 5930 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 2026 |
| 5931 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | Sep 2026 |
| 5932 | Coastal Production Company, Inc. | El Campo, TX 77437 | Oil & Gas Operator | Aug 1995 |
| 5933 | Coastal Production Inc. | | Oil & Gas Operator | Aug 2000 |
| 5934 | Coastal Shoreline Corp. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Aug 2003 |
| 5935 | Coastal States & Emerald Oil | | Oil & Gas Operator | Dec 1979 |
| 5936 | Coastal States Gas Prod Co | | Oil & Gas Operator | Jun 1996 |
| 5937 | Coastland Operations, LLC | Dallas, TX 75287 | Oil & Gas Operator | Sep 2026 |
| 5938 | Coastline Exploration, Inc. | Stafford, TX 77477 | Oil & Gas Operator | Sep 2026 |
| 5939 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 5940 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 5941 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 5942 | Coats Energy, Inc. | Wichita, KS 67201 | Oil & Gas Operator | May 2026 |
| 5943 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | May 2026 |
| 5944 | Cobalt Environmental Solutions LLC | Oklahoma City, OK 73101-0249 | Oil Operator | Jun 2019 |
| 5945 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 5946 | Cobb, E M | Henderson, KY 42420 | Oil Operator | Dec 2019 |
| 5947 | Cobb, Maurice W | | Oil Operator | Dec 2024 |
| 5948 | Cobb, Maurice W Dba M W C Oil Co | Eddyville, KY 42038 | Oil Operator | Dec 2019 |
| 5949 | Cobbs Brothers Oil & Gas | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Jun 2009 |
| 5950 | Cobham Gas Industries, Inc. | | Oil & Gas Operator | Dec 2006 |
| 5951 | Cobopco Inc | Tulsa, OK 74103-4391 | Oil & Gas Operator | Feb 1997 |
| 5952 | Cobra Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 5953 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 5954 | Cobra Operating Company | Houston, TX 77002 | Oil & Gas Operator | Sep 2003 |
| 5955 | Cobra Petroleum Production Corp | | Oil & Gas Operator | Dec 2018 |
| 5956 | Cobra Resources LLC | North Jackson, OH 44451 | Oil & Gas Operator | Dec 2025 |
| 5957 | Cobra-Lyons-Hilliard-Watson | | Oil & Gas Operator | Jun 1992 |
| 5958 | Cochise Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 5959 | Cochon Properties, LLC | | Oil & Gas Operator | Aug 2016 |
| 5960 | Cochran Industrial Corporation | Cushing, OK 74023-1427 | Oil & Gas Operator | Apr 2001 |
| 5961 | Cochrane Resources, Inc. | Roosevelt, UT 84066 | Oil & Gas Operator | Jul 2026 |
| 5962 | Cockburn Oil Corporation | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2005 |
| 5963 | Cockrell Oil Corporation | Houston, TX 77002-7348 | Oil & Gas Operator | Feb 2001 |
| 5964 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Sep 2026 |
| 5965 | Cockriel Petroleum | | Oil & Gas Operator | Dec 1993 |
| 5966 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 5967 | Cody & Krysti Hunsperger | Osawatomie, KS 66064 | Oil Operator | Mar 2026 |
| 5968 | Cody C. Beasley | | Oil & Gas Operator | Apr 1987 |
| 5969 | Cody Company | Amarillo, TX 79121 | Oil & Gas Operator | Mar 2020 |
| 5970 | Cody Energy LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2020 |
| 5971 | Cody Energy, Inc. | Houston, TX 77077 | Oil & Gas Operator | Jul 2026 |
| 5972 | Cody Operating, Inc. | | Oil & Gas Operator | Jun 2026 |
| 5973 | Cody Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Sep 2002 |
| 5974 | Cody, Ken L. | Longton, KS 67352 | Oil & Gas Operator | Mar 2026 |
| 5975 | Cody, Nancy M. | Fredonia, KS 66736 | Oil Operator | Jun 1998 |
| 5976 | Cody, Patricia H | | Oil & Gas Operator | Nov 2007 |
| 5977 | Coe Production Company | Talala, OK 74080-0264 | Oil & Gas Operator | Aug 2015 |
| 5978 | Coe Production Company LLC | Talala, OK 74080 | Oil Operator | May 2026 |
| 5979 | Coelho & Case Oil Company | | Oil & Gas Operator | Dec 1997 |
| 5980 | Coen Energy | | Oil Operator | Mar 1995 |
| 5981 | Coen Energy Corporation | Overland Park, KS 66221 | Oil Operator | May 2026 |
| 5982 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 5983 | Coert Holdings 1 LLC | Greenwich, CT 06830 | Oil & Gas Operator | Dec 2021 |
| 5984 | Cofer & Co LLC | Hobbs, NM 88240 | Oil & Gas Operator | May 2026 |
| 5985 | Coffee Petroleum | | Oil & Gas Operator | Jun 2026 |
| 5986 | Coffman Oil & Gas | | Oil & Gas Operator | Dec 1999 |
| 5987 | Coffman Oil & Real Estate Inc | Newport Beach, CA 92661 | Oil Operator | Dec 2024 |
| 5988 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 5989 | COG Petroleum Corporation | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2019 |
| 5990 | COG Production LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 5991 | Cohen & Kosovitz | | Oil & Gas Operator | May 1998 |
| 5992 | Coho Louisiana Production Co | | Gas Operator | Dec 1998 |
| 5993 | Coho Oil & Gas Inc | Coppell, TX 75019-8288 | Oil & Gas Operator | Mar 2015 |
| 5994 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 5995 | Cohort Energy Company | Centennial, CO 80112 | Oil & Gas Operator | Feb 2007 |
| 5996 | Cokan Resources | Colby, KS 67701 | Oil Operator | Aug 1994 |
| 5997 | Coker Oil Company | Duncan, OK 73533-0818 | Oil Operator | Jan 2014 |
| 5998 | Coker, Jonathan C., Inc. | Austin, TX 78746 | Oil Operator | Mar 2011 |
| 5999 | Coker, Nel Rey Daws | Throckmorton, TX 76483 | Oil & Gas Operator | Mar 2008 |
| 6000 | Coker, Tom | Seymour, TX 76380 | Oil & Gas Operator | Sep 2006 |