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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Armstrong Operating, Inc. | Montana | 1,542 BBLs | 48 MCF | Feb 1995 - Dec 2025 |
| Citation Oil & Gas Corp. | Montana | 15,945 BBLs | 1,757 MCF | Jan 1991 - Dec 2025 |
| Continental Resources Inc | Montana | 179,295 BBLs | 305,757 MCF | Jan 1991 - Dec 2025 |
| Devon Energy Williston, L.L.C. | Montana | 114,197 BBLs | 119,124 MCF | Apr 2021 - Dec 2025 |
| Diamond Halo Group LLC | Montana | 71 BBLs | 0 MCF | Dec 2020 - Dec 2025 |
| Digital Operating Company LLC | Montana | 716 BBLs | 0 MCF | Jun 2021 - Dec 2025 |
| Empire North Dakota LLC | Montana | 3,756 BBLs | 1,421 MCF | Jul 2019 - Dec 2025 |
| Genesis St Operating LLC | Montana | 0 BBLs | 0 MCF | May 1992 - Dec 2025 |
| Kraken Operating, LLC | Montana | 849,078 BBLs | 1,365,535 MCF | Sep 2013 - Dec 2025 |
| Morningstar Operating LLC | Montana | 377,867 BBLs | 526,077 MCF | Jan 2024 - Dec 2025 |
| Murex Petroleum Corp. | Montana | 0 BBLs | 0 MCF | Jan 2001 - Dec 2025 |
| Oasis Petroleum North America LLC | Montana | 42,763 BBLs | 52,395 MCF | Mar 2007 - Dec 2025 |
| Prima Exploration, Inc. | Montana | 36,188 BBLs | 44,358 MCF | Jan 1991 - Dec 2025 |
| R3 Operating Corporation | Montana | 4,539 BBLs | 1,960 MCF | May 2024 - Dec 2025 |
| Ramhorn Energy, LLC | Montana | 98 BBLs | 0 MCF | Dec 2019 - Dec 2025 |
| Rim Operating, Inc. | Montana | 6,134 BBLs | 3,629 MCF | Jan 1991 - Dec 2025 |
| Sinclair Oil & Gas Company | Montana | 1,240 BBLs | 2,318 MCF | Dec 1995 - Dec 2025 |
| Slawson Exploration Company Inc | Montana | 12,177 BBLs | 33,665 MCF | Jun 1993 - Dec 2025 |
| Swanson Oil & Gas LLC | Montana | 1,409 BBLs | 1,774 MCF | Mar 2025 - Dec 2025 |
| True Oil LLC | Montana | 7,793 BBLs | 7,405 MCF | Jan 1986 - Dec 2025 |
| Wesco Operating, Inc. | Montana | 5,619 BBLs | 2,160 MCF | Jun 1999 - Dec 2025 |
| White Rock Oil & Gas, LLC | Montana | 106,301 BBLs | 124,099 MCF | Jan 2015 - Dec 2025 |
| Whiting Oil And Gas Corporation | Montana | 35,479 BBLs | 46,576 MCF | Oct 2003 - Dec 2025 |