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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Cobra Oil & Gas Corporation | North Dakota | 81,675 BBLs | 38,837 MCF | Dec 2015 - Jul 2026 |
| Cobra Oil & Gas Corporation | Utah | 0 BBLs | 79,160 MCF | Aug 2015 - Aug 2026 |
| Cobra Oil & Gas Corporation | Wyoming | 0 BBLs | 32,139 MCF | Jan 1978 - Aug 2026 |
| Cody Operating, Inc. | Mississippi | 1,884 BBLs | 36,915 MCF | Dec 1976 - Jul 2026 |
| COG Operating LLC | New Mexico | 3,635,622 BBLs | 14,871,393 MCF | Dec 2004 - Jul 2026 |
| COG Production, LLC | New Mexico | 546,087 BBLs | 2,782,539 MCF | Jul 2004 - Jul 2026 |
| Colt Energy Inc | Kansas | 14,864 BBLs | 45,138 MCF | Jan 1980 - Jun 2026 |
| Compass Energy Operating, LLC | Louisiana | 138 BBLs | 869,300 MCF | Jul 2014 - Jan 2025 |
| Compass Exploration LLC | Kansas | 1,255 BBLs | 0 MCF | Jan 2020 - Jun 2026 |
| Comstock Oil & Gas--La, LLC | Louisiana | 690 BBLs | 39,125,046 MCF | Apr 2005 - Dec 2024 |
| Connell, Mark Allen | Kansas | 1,002 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Conocophillips Alaska, Inc. | Alaska | 3,652,782 BBLs | 10,204,933 MCF | Dec 1963 - Feb 2026 |
| Conocophillips Company | New Mexico | 910,191 BBLs | 3,349,826 MCF | Jan 2003 - Jul 2026 |
| Contango Resources LLC | Wyoming | 299,733 BBLs | 10,146,139 MCF | Feb 2020 - Aug 2026 |
| Contango Resources, Inc. | Montana | 5,278 BBLs | 6,099 MCF | Dec 2020 - Jul 2026 |
| Continental Resources Inc | Montana | 155,337 BBLs | 346,448 MCF | Jan 1991 - Jul 2026 |
| Continental Resources Inc | Wyoming | 964,698 BBLs | 2,981,791 MCF | Jan 1993 - Aug 2026 |
| Continental Resources, Inc. | North Dakota | 4,302,306 BBLs | 18,927,581 MCF | Sep 1978 - Jul 2026 |
| Cook Inlet Energy, LLC. | Alaska | 80,432 BBLs | 38,413 MCF | Dec 2009 - Feb 2026 |
| Coral Production Corporation | Kansas | 2,446 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Cornerstone Natural Resources LLC | North Dakota | 7,323 BBLs | 9,745 MCF | Jan 2007 - Jul 2026 |
| Coteau Energy LLC | Louisiana | 11,100 BBLs | 72,787 MCF | Aug 2021 - Dec 2024 |
| Coterra Energy Operating Co. | New Mexico | 3,905,560 BBLs | 15,395,814 MCF | Oct 2002 - Jul 2026 |
| Covalence Operating Company LLC | Colorado | 20,503 BBLs | 245,395 MCF | Nov 2025 - Jul 2026 |
| Crawford Production Company | Kansas | 1,784 BBLs | 711 MCF | Jan 1980 - Jun 2026 |
| Creole Operating, LLC | Louisiana | 1,922 BBLs | 11,244 MCF | May 2020 - Dec 2024 |
| Crescent Energy Operating, LLC | Utah | 38,858 BBLs | 2,582,461 MCF | Sep 2025 - Aug 2026 |
| Crescent Pass Energy, LLC | Louisiana | 100 BBLs | 90,211 MCF | Aug 2018 - Jan 2025 |
| Crestone Peak Resources Operating LLC | Colorado | 1,195,087 BBLs | 5,720,944 MCF | Jan 1999 - Jul 2026 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 4,574 BBLs | 38,627 MCF | Apr 1982 - Jul 2026 |
| Cross Bar Energy, LLC | Kansas | 5,400 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Cross Timbers Energy, LLC | New Mexico | 1,484 BBLs | 6,539 MCF | Jul 2013 - Jul 2026 |
| Crowheart Energy LLC | Wyoming | 250,528 BBLs | 9,350,347 MCF | Feb 2018 - Jul 2026 |
| Crown Energy Company | Kansas | 1,791 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Ctoc Energy, LLC | New Mexico | 22,908 BBLs | 347,469 MCF | Jun 2026 - Jul 2026 |
| Curt'S Oil Operation, LLC | Kansas | 4,546 BBLs | 1,573 MCF | Jan 2010 - Jun 2026 |
| Dakota Crude, Inc. | North Dakota | 1,168 BBLs | 0 MCF | May 2003 - Jul 2026 |
| Dakota Resources, Inc | New Mexico | 1,436 BBLs | 1,197 MCF | Jan 1993 - Jul 2026 |
| Dale E. Jackson Production Co. | Kansas | 1,972 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Darrah Oil Company, LLC | Kansas | 15,351 BBLs | 7,424 MCF | Jan 2010 - Jun 2026 |
| Daube Company The | Wyoming | 7,741 BBLs | 450 MCF | Jan 1990 - Aug 2026 |
| Daylight Petroleum LLC | Louisiana | 6,709 BBLs | 21,077 MCF | Feb 2019 - Dec 2024 |
| Daystar Petroleum, Inc. | Kansas | 10,497 BBLs | 12,105 MCF | Jan 1980 - Jun 2026 |
| De Soto Oil Properties, LLC | Alabama | 1,231 BBLs | 787 MCF | May 1988 - Jul 2026 |
| Delta Royalties LLC | Louisiana | 2,739 BBLs | 7,275 MCF | Nov 2019 - Dec 2024 |
| Denbury Onshore LLC | Wyoming | 108,869 BBLs | 90,876 MCF | Jan 2011 - Aug 2026 |
| Denbury Onshore, LLC | Alabama | 18,830 BBLs | 0 MCF | Jan 1956 - Jul 2026 |
| Denbury Onshore, LLC | Louisiana | 76,063 BBLs | 69,845 MCF | Jan 2004 - Dec 2024 |
| Denbury Onshore, LLC | Mississippi | 64,901 BBLs | 318,497 MCF | Jun 1971 - Jul 2026 |
| Denbury Onshore, LLC | Montana | 72,229 BBLs | 5,056,537 MCF | Jan 2011 - Jul 2026 |