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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Citation Oil & Gas Corp. | Montana | 15,341 BBLs | 952 MCF | Jan 1991 - Jan 2026 |
| Continental Resources Inc | Montana | 192,166 BBLs | 330,165 MCF | Jan 1991 - Jan 2026 |
| Darrah Oil Company, LLC | Montana | 176 BBLs | 0 MCF | Sep 2007 - Jan 2026 |
| Devon Energy Williston, L.L.C. | Montana | 94,855 BBLs | 104,922 MCF | Apr 2021 - Jan 2026 |
| Digital Operating Company LLC | Montana | 306 BBLs | 0 MCF | Jun 2021 - Jan 2026 |
| Foundation Energy Management, LLC | Montana | 1,127 BBLs | 638 MCF | Jan 2016 - Jan 2026 |
| Granite Creek Energy LLC | Montana | 7,888 BBLs | 4,917 MCF | Mar 2024 - Jan 2026 |
| Green Valley Operating, LLC | Montana | 2,063 BBLs | 1,100 MCF | Jun 2022 - Jan 2026 |
| HK Eagle LLC | Montana | 436 BBLs | 0 MCF | Sep 2025 - Jan 2026 |
| Kraken Operating, LLC | Montana | 768,880 BBLs | 1,273,882 MCF | Sep 2013 - Jan 2026 |
| Oasis Petroleum North America LLC | Montana | 67,524 BBLs | 62,956 MCF | Mar 2007 - Jan 2026 |
| Phoenix Operating LLC | Montana | 67,247 BBLs | 104,928 MCF | Nov 2024 - Jan 2026 |
| Prima Exploration, Inc. | Montana | 47,614 BBLs | 63,023 MCF | Jan 1991 - Jan 2026 |
| R3 Operating Corporation | Montana | 3,454 BBLs | 1,457 MCF | May 2024 - Jan 2026 |
| Samson Oil And Gas USA, Inc. | Montana | 8,733 BBLs | 5,111 MCF | May 2012 - Jan 2026 |
| Sinclair Oil & Gas Company | Montana | 1,236 BBLs | 1,528 MCF | Dec 1995 - Jan 2026 |
| Slawson Exploration Company Inc | Montana | 11,755 BBLs | 24,342 MCF | Jun 1993 - Jan 2026 |
| True Oil LLC | Montana | 7,635 BBLs | 5,876 MCF | Jan 1986 - Jan 2026 |
| White Rock Oil & Gas, LLC | Montana | 213,989 BBLs | 158,232 MCF | Jan 2015 - Jan 2026 |
| Whiting Oil And Gas Corporation | Montana | 32,968 BBLs | 42,379 MCF | Oct 2003 - Jan 2026 |