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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Conocophillips Company | New Mexico | 655,375 BBLs | 2,990,980 MCF | Jan 2003 - Oct 2025 |
| Contango Resources LLC | Wyoming | 388,067 BBLs | 4,957,212 MCF | Feb 2020 - Oct 2025 |
| Contango Resources, Inc. | Montana | 19,635 BBLs | 77,123 MCF | Dec 2020 - Sep 2025 |
| Continental Resources Inc | Montana | 242,469 BBLs | 371,107 MCF | Jan 1991 - Sep 2025 |
| Continental Resources Inc | Wyoming | 893,193 BBLs | 2,746,010 MCF | Jan 1993 - Oct 2025 |
| Continental Resources, Inc. | North Dakota | 5,904,695 BBLs | 20,980,186 MCF | Sep 1978 - Oct 2025 |
| Cook Inlet Energy, LLC. | Alaska | 96,242 BBLs | 38,873 MCF | Dec 2009 - Oct 2025 |
| Coral Production Corporation | Kansas | 2,398 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Core Antrim Company LLC | Michigan | 0 BBLs | 62,908 MCF | Jul 2025 - Oct 2025 |
| Core Energy LLC | Michigan | 31,725 BBLs | 11,807 MCF | Jan 2006 - Sep 2025 |
| Cornerstone Natural Resources LLC | North Dakota | 7,294 BBLs | 10,606 MCF | Jan 2007 - Oct 2025 |
| Coteau Energy LLC | Louisiana | 11,100 BBLs | 72,787 MCF | Aug 2021 - Dec 2024 |
| Coterra Energy Operating Co. | New Mexico | 1,226,737 BBLs | 6,847,681 MCF | Oct 2002 - Sep 2025 |
| Coterra Energy Operating E LLC | New Mexico | 304,379 BBLs | 403,701 MCF | Jan 2023 - Sep 2025 |
| Coterra Energy Operating F LLC | New Mexico | 1,081,566 BBLs | 4,222,826 MCF | Apr 2019 - Sep 2025 |
| Crawford Production Company | Kansas | 1,336 BBLs | 721 MCF | Jan 1980 - Jun 2025 |
| Creole Operating, LLC | Louisiana | 1,922 BBLs | 11,244 MCF | May 2020 - Dec 2024 |
| Crescent Energy Operating, LLC | Utah | 567,738 BBLs | 2,228,018 MCF | Sep 2025 - Sep 2025 |
| Crescent Pass Energy, LLC | Louisiana | 100 BBLs | 90,211 MCF | Aug 2018 - Jan 2025 |
| Crestone Peak Resources Operating LLC | Colorado | 1,248,999 BBLs | 6,424,049 MCF | Jan 1999 - Sep 2025 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 2,756 BBLs | 22,761 MCF | Apr 1982 - Sep 2025 |
| Cross Bar Energy, LLC | Kansas | 2,273 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Cross Timbers Energy, LLC | New Mexico | 27,531 BBLs | 386,350 MCF | Jul 2013 - Sep 2025 |
| Crowheart Energy LLC | Wyoming | 260,098 BBLs | 8,376,917 MCF | Feb 2018 - Sep 2025 |
| Crown Energy Company | Kansas | 2,315 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Cumberland Operating LLC | Wyoming | 520 BBLs | 15,450 MCF | Oct 2015 - Oct 2025 |
| Curt'S Oil Operation, LLC | Kansas | 4,627 BBLs | 2,475 MCF | Jan 2010 - Jun 2025 |
| Dakota Crude, Inc. | North Dakota | 1,398 BBLs | 0 MCF | May 2003 - Oct 2025 |
| Dale E. Jackson Production Co. | Kansas | 1,960 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Darrah Oil Company, LLC | Kansas | 16,783 BBLs | 7,084 MCF | Jan 2010 - Jun 2025 |
| Daube Company The | Wyoming | 7,571 BBLs | 450 MCF | Jan 1990 - Sep 2025 |
| Daylight Petroleum LLC | Louisiana | 6,709 BBLs | 21,077 MCF | Feb 2019 - Dec 2024 |
| Daystar Petroleum, Inc. | Kansas | 11,240 BBLs | 14,356 MCF | Jan 1980 - Jun 2025 |
| De Soto Oil Properties, LLC | Alabama | 1,597 BBLs | 1,520 MCF | May 1988 - Sep 2025 |
| Deep River Energy LLC | Michigan | 1,488 BBLs | 0 MCF | May 2022 - Sep 2025 |
| Delta Royalties LLC | Louisiana | 2,739 BBLs | 7,275 MCF | Nov 2019 - Dec 2024 |
| Denbury Onshore LLC | Wyoming | 165,084 BBLs | 118,040 MCF | Jan 2011 - Sep 2025 |
| Denbury Onshore, LLC | Louisiana | 76,063 BBLs | 69,845 MCF | Jan 2004 - Dec 2024 |
| Denbury Onshore, LLC | Montana | 275,571 BBLs | 5,964,100 MCF | Jan 2011 - Sep 2025 |
| Denbury Onshore, LLC | North Dakota | 95,222 BBLs | 20,847 MCF | Oct 2007 - Oct 2025 |
| Desert Eagle Operating LLC | Colorado | 0 BBLs | 43,787 MCF | Apr 2022 - Oct 2025 |
| Deutsch Oil Company | Kansas | 3,496 BBLs | 988 MCF | Jan 1980 - Jun 2025 |
| Devon Energy Production Company LP | Wyoming | 717,336 BBLs | 1,170,560 MCF | Jan 1978 - Oct 2025 |
| Devon Energy Production Company, LP | New Mexico | 6,522,217 BBLs | 32,920,891 MCF | Jan 1993 - Sep 2025 |
| Devon Energy Williston, L.L.C. | Montana | 160,708 BBLs | 137,982 MCF | Apr 2021 - Sep 2025 |
| DGH Oil, LLC | Kansas | 4,658 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| DHP Investments, LTD. | Kansas | 1,316 BBLs | 0 MCF | Mar 2008 - Jun 2025 |
| Diamond Oil & Gas LLC | Wyoming | 1,124 BBLs | 13,232 MCF | Oct 2011 - Oct 2025 |
| Diehl Oil Inc | Kansas | 2,094 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Diversified Production LLC | Louisiana | 8,836 BBLs | 3,242,940 MCF | May 2021 - Dec 2024 |