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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Armstrong Operating, Inc. | Montana | 1,164 BBLs | 47 MCF | Feb 1995 - Apr 2026 |
| Citation Oil & Gas Corp. | Montana | 16,399 BBLs | 849 MCF | Jan 1991 - Apr 2026 |
| Continental Resources Inc | Montana | 153,491 BBLs | 305,968 MCF | Jan 1991 - Apr 2026 |
| Devon Energy Williston, L.L.C. | Montana | 215,090 BBLs | 232,759 MCF | Apr 2021 - Apr 2026 |
| Digital Operating Company LLC | Montana | 167 BBLs | 0 MCF | Jun 2021 - Apr 2026 |
| Empire North Dakota LLC | Montana | 3,263 BBLs | 0 MCF | Jul 2019 - Apr 2026 |
| Kraken Operating, LLC | Montana | 863,679 BBLs | 1,299,772 MCF | Sep 2013 - Apr 2026 |
| Morningstar Operating LLC | Montana | 304,346 BBLs | 476,065 MCF | Jan 2024 - Apr 2026 |
| Murex Petroleum Corp. | Montana | 42 BBLs | 0 MCF | Jan 2001 - Apr 2026 |
| Oasis Petroleum North America LLC | Montana | 65,575 BBLs | 66,621 MCF | Mar 2007 - Apr 2026 |
| Phoenix Operating LLC | Montana | 51,228 BBLs | 97,535 MCF | Nov 2024 - Apr 2026 |
| Prima Exploration, Inc. | Montana | 48,573 BBLs | 79,532 MCF | Jan 1991 - Apr 2026 |
| R3 Operating Corporation | Montana | 4,979 BBLs | 443 MCF | May 2024 - Apr 2026 |
| Ridge Oil & Gas, LLC | Montana | 5,575 BBLs | 753,796 MCF | Feb 2022 - Apr 2026 |
| Rim Operating, Inc. | Montana | 6,418 BBLs | 3,308 MCF | Jan 1991 - Apr 2026 |
| Samson Oil And Gas USA, Inc. | Montana | 8,710 BBLs | 4,961 MCF | May 2012 - Apr 2026 |
| Sinclair Oil & Gas Company | Montana | 867 BBLs | 1,823 MCF | Dec 1995 - Apr 2026 |
| Slawson Exploration Company Inc | Montana | 13,555 BBLs | 33,949 MCF | Jun 1993 - Apr 2026 |
| Swanson Oil & Gas LLC | Montana | 997 BBLs | 1,123 MCF | Mar 2025 - Apr 2026 |
| True Oil LLC | Montana | 5,941 BBLs | 4,142 MCF | Jan 1986 - Apr 2026 |
| Wesco Operating, Inc. | Montana | 5,318 BBLs | 2,655 MCF | Jun 1999 - Apr 2026 |
| White Rock Oil & Gas, LLC | Montana | 197,739 BBLs | 152,351 MCF | Jan 2015 - Apr 2026 |
| Whiting Oil And Gas Corporation | Montana | 31,841 BBLs | 42,709 MCF | Oct 2003 - Apr 2026 |