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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Armstrong Operating, Inc. | Montana | 1,241 BBLs | 45 MCF | Feb 1995 - Jun 2026 |
| Continental Resources Inc | Montana | 99,167 BBLs | 206,079 MCF | Jan 1991 - Jun 2026 |
| Devon Energy Williston, L.L.C. | Montana | 87,621 BBLs | 92,738 MCF | Apr 2021 - Jun 2026 |
| Digital Operating Company LLC | Montana | 275 BBLs | 0 MCF | Jun 2021 - Jun 2026 |
| Empire North Dakota LLC | Montana | 2,356 BBLs | 0 MCF | Jul 2019 - Jun 2026 |
| Genesis St Operating LLC | Montana | 0 BBLs | 0 MCF | May 1992 - Jun 2026 |
| Kraken Operating, LLC | Montana | 732,544 BBLs | 1,238,293 MCF | Sep 2013 - Jun 2026 |
| Montana Heartland LLC | Montana | 404 BBLs | 1,270 MCF | Jun 1991 - Jun 2026 |
| Morningstar Operating LLC | Montana | 264,831 BBLs | 436,062 MCF | Jan 2024 - Jun 2026 |
| Oasis Petroleum North America LLC | Montana | 58,658 BBLs | 81,897 MCF | Mar 2007 - Jun 2026 |
| Phoenix Operating LLC | Montana | 37,043 BBLs | 77,095 MCF | Nov 2024 - Jun 2026 |
| Prima Exploration, Inc. | Montana | 28,232 BBLs | 48,847 MCF | Jan 1991 - Jun 2026 |
| R3 Operating Corporation | Montana | 4,809 BBLs | 811 MCF | May 2024 - Jun 2026 |
| Ramhorn Energy, LLC | Montana | 94 BBLs | 0 MCF | Dec 2019 - Jun 2026 |
| Rim Operating, Inc. | Montana | 6,228 BBLs | 3,076 MCF | Jan 1991 - Jun 2026 |
| Samson Oil And Gas USA, Inc. | Montana | 6,266 BBLs | 3,132 MCF | May 2012 - Jun 2026 |
| Sinclair Oil & Gas Company | Montana | 781 BBLs | 1,421 MCF | Dec 1995 - Jun 2026 |
| Slawson Exploration Company Inc | Montana | 10,680 BBLs | 23,833 MCF | Jun 1993 - Jun 2026 |
| Swanson Oil & Gas LLC | Montana | 3,348 BBLs | 11,131 MCF | Mar 2025 - Jun 2026 |
| True Oil LLC | Montana | 7,056 BBLs | 4,925 MCF | Jan 1986 - Jun 2026 |
| Wesco Operating, Inc. | Montana | 6,128 BBLs | 2,847 MCF | Jun 1999 - Jun 2026 |
| White Rock Oil & Gas, LLC | Montana | 202,661 BBLs | 155,815 MCF | Jan 2015 - Jun 2026 |
| Whiting Oil And Gas Corporation | Montana | 35,168 BBLs | 48,844 MCF | Oct 2003 - Jun 2026 |