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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Contango Resources LLC | Wyoming | 393,568 BBLs | 10,582,134 MCF | Feb 2020 - Jun 2025 |
| Contango Resources, Inc. | Montana | 21,125 BBLs | 77,313 MCF | Dec 2020 - Jul 2025 |
| Continental Resources Inc | Montana | 144,201 BBLs | 277,934 MCF | Jan 1991 - Jun 2025 |
| Continental Resources Inc | Wyoming | 815,139 BBLs | 2,684,436 MCF | Jan 1993 - Jun 2025 |
| Continental Resources, Inc. | North Dakota | 5,657,039 BBLs | 18,862,783 MCF | Sep 1978 - Jul 2025 |
| Cook Inlet Energy, LLC. | Alaska | 109,725 BBLs | 34,537 MCF | Dec 2009 - Jul 2025 |
| Coral Production Corporation | Kansas | 2,607 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Core Energy LLC | Michigan | 27,712 BBLs | 10,659 MCF | Jan 2006 - Jun 2025 |
| Cornerstone Natural Resources LLC | North Dakota | 7,755 BBLs | 11,448 MCF | Jan 2007 - Jun 2025 |
| Coteau Energy LLC | Louisiana | 11,100 BBLs | 72,787 MCF | Aug 2021 - Dec 2024 |
| Coterra Energy Operating Co. | New Mexico | 1,644,277 BBLs | 7,623,186 MCF | Oct 2002 - Jun 2025 |
| Coterra Energy Operating E LLC | New Mexico | 437,831 BBLs | 504,191 MCF | Jan 2023 - Jun 2025 |
| Coterra Energy Operating F LLC | New Mexico | 1,013,987 BBLs | 3,232,451 MCF | Apr 2019 - Jun 2025 |
| Crawford Production Company | Kansas | 2,417 BBLs | 734 MCF | Jan 1980 - Apr 2025 |
| 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 | 1,474,787 BBLs | 6,794,242 MCF | Aug 2016 - Jun 2025 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 6,719 BBLs | 44,499 MCF | Apr 1982 - May 2025 |
| Cross Bar Energy, LLC | Kansas | 2,638 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Cross Timbers Energy, LLC | New Mexico | 26,664 BBLs | 394,149 MCF | Jul 2013 - Jun 2025 |
| Crowheart Energy LLC | Wyoming | 243,970 BBLs | 8,152,846 MCF | Feb 2018 - Jun 2025 |
| Crown Energy Company | Kansas | 2,668 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Curt'S Oil Operation, LLC | Kansas | 4,589 BBLs | 1,292 MCF | Jan 2010 - Apr 2025 |
| Dakota Crude, Inc. | North Dakota | 1,317 BBLs | 0 MCF | May 2003 - Jul 2025 |
| Dale E. Jackson Production Co. | Kansas | 1,942 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Darrah Oil Company, LLC | Kansas | 19,085 BBLs | 7,298 MCF | Jan 2010 - Apr 2025 |
| Daube Company The | Wyoming | 7,715 BBLs | 450 MCF | Jan 1990 - Jun 2025 |
| Daylight Petroleum LLC | Louisiana | 6,709 BBLs | 21,077 MCF | Feb 2019 - Dec 2024 |
| Daystar Petroleum, Inc. | Kansas | 12,642 BBLs | 14,786 MCF | Jan 1980 - Apr 2025 |
| De Soto Oil Properties, LLC | Alabama | 2,099 BBLs | 1,680 MCF | May 1988 - May 2025 |
| Delta Royalties LLC | Louisiana | 2,739 BBLs | 7,275 MCF | Nov 2019 - Dec 2024 |
| Denbury Onshore LLC | Wyoming | 172,711 BBLs | 124,363 MCF | Jan 2011 - Jun 2025 |
| Denbury Onshore, LLC | Louisiana | 76,063 BBLs | 69,845 MCF | Jan 2004 - Dec 2024 |
| Denbury Onshore, LLC | Mississippi | 35,211 BBLs | 0 MCF | Jun 1971 - May 2025 |
| Denbury Onshore, LLC | Montana | 267,493 BBLs | 5,879,385 MCF | Jan 2011 - Jun 2025 |
| Denbury Onshore, LLC | North Dakota | 93,550 BBLs | 17,367 MCF | Oct 2007 - Jul 2025 |
| Desert Eagle Operating LLC | Colorado | 0 BBLs | 48,560 MCF | Jun 2022 - Jun 2025 |
| Deutsch Oil Company | Kansas | 4,938 BBLs | 1,152 MCF | Jan 1980 - Apr 2025 |
| Devon Energy Production Company LP | Wyoming | 698,416 BBLs | 1,166,198 MCF | Jan 1978 - Jun 2025 |
| Devon Energy Production Company, LP | New Mexico | 6,049,860 BBLs | 31,208,791 MCF | Jan 1993 - Jun 2025 |
| Devon Energy Williston, L.L.C. | Montana | 4,925 BBLs | 11,341 MCF | Apr 2021 - Jun 2025 |
| DGH Oil, LLC | Kansas | 5,034 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Diehl Oil Inc | Kansas | 1,761 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Digital Operating Company LLC | Montana | 2,188 BBLs | 931 MCF | Jun 2021 - Jun 2025 |
| Diversified Production LLC | Louisiana | 8,836 BBLs | 3,242,940 MCF | May 2021 - Dec 2024 |
| Dixon Operating Company, LLC | Kansas | 10,974 BBLs | 44,242 MCF | Jan 2010 - Apr 2025 |
| DJR Operating, LLC | New Mexico | 543,900 BBLs | 1,474,800 MCF | Nov 2017 - Jun 2025 |
| DNR Oil And Gas, Inc. | Kansas | 1,454 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Dorcheat Oil & Gas, LLC | Louisiana | 245 BBLs | 35,651 MCF | Mar 2016 - Dec 2024 |
| Double Eagle Exploration, Inc. | Kansas | 1,762 BBLs | 0 MCF | Jan 1980 - Apr 2025 |