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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Conocophillips Company | New Mexico | 314,365 BBLs | 1,341,774 MCF | Jan 2003 - Jan 2025 |
| Contango Resources LLC | Wyoming | 384,542 BBLs | 10,806,089 MCF | Feb 2020 - Feb 2025 |
| Contango Resources, Inc. | Montana | 16,185 BBLs | 63,453 MCF | Dec 2020 - Feb 2025 |
| Contango Resources, LLC | New Mexico | 6,123 BBLs | 62,849 MCF | Feb 2021 - Jan 2025 |
| Continental Resources Inc | Montana | 126,226 BBLs | 262,781 MCF | Jan 1991 - Jan 2025 |
| Continental Resources Inc | Wyoming | 729,898 BBLs | 2,481,810 MCF | Jan 1993 - Feb 2025 |
| Continental Resources, Inc. | North Dakota | 4,279,966 BBLs | 16,051,513 MCF | Sep 1978 - Feb 2025 |
| Cook Inlet Energy, LLC. | Alaska | 111,541 BBLs | 58,724 MCF | Dec 2009 - Feb 2025 |
| Coral Production Corporation | Kansas | 1,639 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Core Energy LLC | Michigan | 31,366 BBLs | 9,789 MCF | Jan 2006 - Jan 2025 |
| Cornerstone Natural Resources LLC | North Dakota | 7,054 BBLs | 7,885 MCF | Jan 2007 - Feb 2025 |
| Coteau Energy LLC | Louisiana | 11,100 BBLs | 72,787 MCF | Aug 2021 - Dec 2024 |
| Coterra Energy Operating Co. | New Mexico | 1,493,382 BBLs | 5,644,720 MCF | Oct 2002 - Jan 2025 |
| Crawford Production Company | Kansas | 1,622 BBLs | 750 MCF | Jan 1980 - Dec 2024 |
| Creole Operating, LLC | Louisiana | 1,922 BBLs | 11,244 MCF | May 2020 - Dec 2024 |
| Crescent Pass Energy, LLC | Louisiana | 100 BBLs | 90,211 MCF | Aug 2018 - Jan 2025 |
| Crestone Peak Resources Operating LLC | Colorado | 1,406,545 BBLs | 7,409,404 MCF | Aug 2016 - Jan 2025 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 5,845 BBLs | 36,932 MCF | Apr 1982 - Jan 2025 |
| Cross Bar Energy, LLC | Kansas | 2,640 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Cross Timbers Energy, LLC | New Mexico | 26,432 BBLs | 371,766 MCF | Jul 2013 - Jan 2025 |
| Crowheart Energy LLC | Wyoming | 242,244 BBLs | 6,704,052 MCF | Feb 2018 - Jan 2025 |
| Crown Energy Company | Kansas | 1,630 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Cumberland Operating LLC | Wyoming | 214 BBLs | 22,479 MCF | Oct 2015 - Feb 2025 |
| Curt'S Oil Operation, LLC | Kansas | 4,778 BBLs | 235 MCF | Jan 2010 - Dec 2024 |
| CWT Operating, LLC | Montana | 1,457 BBLs | 312 MCF | Dec 2021 - Jan 2025 |
| Cypress Operating, Inc | Arkansas | 2,283 BBLs | 0 MCF | Jan 2001 - Jan 2025 |
| D & Z Exploration, Inc. | Kansas | 1,350 BBLs | 0 MCF | Jul 1985 - Dec 2024 |
| Dale E. Jackson Production Co. | Kansas | 1,977 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Darrah Oil Company, LLC | Kansas | 15,125 BBLs | 5,160 MCF | Jan 2010 - Dec 2024 |
| Daube Company The | Wyoming | 4,853 BBLs | 450 MCF | Jan 1990 - Jan 2025 |
| Daylight Petroleum LLC | Louisiana | 6,709 BBLs | 21,077 MCF | Feb 2019 - Dec 2024 |
| Daystar Petroleum, Inc. | Kansas | 10,653 BBLs | 13,919 MCF | Jan 1980 - Dec 2024 |
| De Soto Oil Properties, LLC | Alabama | 1,723 BBLs | 1,397 MCF | May 1988 - Jan 2025 |
| Delta Royalties LLC | Louisiana | 2,739 BBLs | 7,275 MCF | Nov 2019 - Dec 2024 |
| Denbury Onshore LLC | Wyoming | 192,716 BBLs | 132,796 MCF | Jan 2011 - Feb 2025 |
| Denbury Onshore, LLC | Alabama | 20,548 BBLs | 0 MCF | Jan 1956 - Jan 2025 |
| Denbury Onshore, LLC | Louisiana | 76,063 BBLs | 69,845 MCF | Jan 2004 - Dec 2024 |
| Denbury Onshore, LLC | Montana | 306,406 BBLs | 6,190,640 MCF | Jan 2011 - Jan 2025 |
| Denbury Onshore, LLC | North Dakota | 73,000 BBLs | 15,919 MCF | Oct 2007 - Feb 2025 |
| Desert Eagle Operating LLC | Colorado | 0 BBLs | 47,648 MCF | Jun 2022 - Feb 2025 |
| Desert Mountain Energy Corp. | New Mexico | 0 BBLs | 26,712 MCF | Jan 2025 - Jan 2025 |
| Deutsch Oil Company | Kansas | 2,916 BBLs | 1,679 MCF | Jan 1980 - Dec 2024 |
| Devon Energy Production Company LP | Wyoming | 715,337 BBLs | 1,116,425 MCF | Jan 1978 - Feb 2025 |
| Devon Energy Production Company, LP | New Mexico | 6,588,291 BBLs | 29,078,030 MCF | Jan 1993 - Jan 2025 |
| Devon Energy Williston, L.L.C. | Montana | 5,988 BBLs | 14,582 MCF | Apr 2021 - Jan 2025 |
| DGH Oil, LLC | Kansas | 4,517 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Diamond Oil & Gas LLC | Wyoming | 1,220 BBLs | 14,614 MCF | Oct 2011 - Feb 2025 |
| Diehl Oil Inc | Kansas | 1,757 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Diversified Production LLC | Louisiana | 8,836 BBLs | 3,242,940 MCF | May 2021 - Dec 2024 |
| Dixon Operating Company, LLC | Kansas | 10,307 BBLs | 48,896 MCF | Jan 2010 - Dec 2024 |