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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| North Slope Borough | Alaska | 0 BBLs | 88,767 MCF | Sep 1950 - Sep 2025 |
| Northern Lights Oil Company, LLC | Kansas | 1,442 BBLs | 593 MCF | Jan 1980 - Jun 2025 |
| Northern Oil Production, Inc. | Montana | 6,325 BBLs | 2,403 MCF | May 1992 - Aug 2025 |
| Northwestern Corporation | Montana | 525 BBLs | 364,226 MCF | Apr 2004 - Aug 2025 |
| Novo Oil & Gas Northern Delaware, LLC | New Mexico | 529,697 BBLs | 3,955,941 MCF | Feb 2018 - Aug 2025 |
| Nuenergy LLC | Michigan | 1,357 BBLs | 75,556 MCF | Jul 2001 - Sep 2025 |
| O'Brien Energy Resources Corp. | Kansas | 2,305 BBLs | 34,030 MCF | May 2008 - Jun 2025 |
| Oasis Petroleum North America LLC | Montana | 46,602 BBLs | 54,426 MCF | Mar 2007 - Aug 2025 |
| Oasis Petroleum North America LLC | North Dakota | 2,470,541 BBLs | 6,957,857 MCF | May 2007 - Sep 2025 |
| Occidental Permian LTD | New Mexico | 440,120 BBLs | 1,224,163 MCF | Mar 1997 - Aug 2025 |
| Ogris Operating LLC | Colorado | 0 BBLs | 641,543 MCF | Jan 1999 - Aug 2025 |
| Oil Mountain Energy Inc | Wyoming | 1,303 BBLs | 0 MCF | Oct 2018 - Sep 2025 |
| Oil Producers, Inc. Of Kansas | Kansas | 8,140 BBLs | 53,572 MCF | Jan 1980 - Jun 2025 |
| Oil Search (Alaska), LLC | Alaska | 4,653 BBLs | 1,293 MCF | Sep 2023 - Sep 2025 |
| Oildigger Resources Fund L LLLP | Wyoming | 4,879 BBLs | 3,144 MCF | Sep 2016 - Sep 2025 |
| Oilfield Salvage & Service Company | Wyoming | 1,902 BBLs | 3,906 MCF | Jan 1978 - Sep 2025 |
| Oleum Energy LLC | New Mexico | 3,119 BBLs | 0 MCF | Aug 2022 - Aug 2025 |
| Olipdp II, LLC | Louisiana | 14,206 BBLs | 54,310 MCF | Jul 2022 - Dec 2024 |
| Omimex Energy Inc | Michigan | 6,120 BBLs | 19,049 MCF | Jan 1982 - Aug 2025 |
| Opal Operating Company LLC | New Mexico | 3,603 BBLs | 39,218 MCF | Sep 2021 - Aug 2025 |
| Organic Energy Company LLC | Colorado | 2,236 BBLs | 2,930 MCF | Jul 2007 - Sep 2025 |
| Orx Resources, L.L.C. | Louisiana | 9,403 BBLs | 198,757 MCF | Jan 2010 - Dec 2024 |
| Owens Oil Company, LLC | Kansas | 2,193 BBLs | 0 MCF | Jan 2010 - Jun 2025 |
| Owens Petroleum LLC | Kansas | 1,645 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Own Resources Operating LLC | Colorado | 65 BBLs | 852,702 MCF | Jan 1999 - Aug 2025 |
| Own Resources Operating LLC | Kansas | 153 BBLs | 76,525 MCF | Jan 2010 - Jun 2025 |
| Oxy USA Inc | Colorado | 0 BBLs | 154,522 MCF | Jan 1999 - Aug 2025 |
| Oxy USA Inc | New Mexico | 3,831,023 BBLs | 21,145,219 MCF | Jan 1993 - Aug 2025 |
| Oxy USA Inc. | Kansas | 700 BBLs | 15,449 MCF | Jan 1980 - Jun 2025 |
| Oxy USA WTP Limited Partnership | New Mexico | 32,240 BBLs | 337,589 MCF | Jan 2001 - Aug 2025 |
| P O & G Operating LLC | Wyoming | 12,957 BBLs | 26,418 MCF | Jan 2017 - Aug 2025 |
| P. O. & G. Operating, LLC | Mississippi | 4,048 BBLs | 0 MCF | Dec 1976 - Aug 2025 |
| P.O. & G. Operating, LLC | North Dakota | 4,533 BBLs | 1,530 MCF | Jun 2018 - Sep 2025 |
| Palmer Oil, Inc. | Kansas | 3,146 BBLs | 19,261 MCF | Nov 2005 - Jun 2025 |
| Paloma Natural Gas, LLC | Louisiana | 0 BBLs | 12,616,935 MCF | Mar 2022 - Dec 2024 |
| Paloma Permian Assetco, LLC | New Mexico | 10,390 BBLs | 13,635 MCF | Oct 2024 - Aug 2025 |
| Palomino Petroleum, Inc. | Kansas | 31,416 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Pantera Energy Company | Kansas | 4,101 BBLs | 516 MCF | Jan 2010 - Jun 2025 |
| Paradigm Energy LLC | Louisiana | 2,262 BBLs | 0 MCF | Dec 2014 - Dec 2024 |
| Parish Operating LLC | Mississippi | 1,761 BBLs | 0 MCF | Jan 2024 - Aug 2025 |
| Patterson Energy LLC | Kansas | 49,028 BBLs | 0 MCF | Jan 2010 - Jun 2025 |
| Paul Bowman Oil Trust | Kansas | 1,475 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Pauley Oil | Kansas | 2,758 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Paxton Resources LLC | Michigan | 6,579 BBLs | 0 MCF | Dec 1995 - Sep 2025 |
| Pbex Operations, LLC | New Mexico | 52,682 BBLs | 55,259 MCF | Mar 2025 - Sep 2025 |
| PDC Energy Inc | Colorado | 2,238,397 BBLs | 26,006,646 MCF | Jan 1999 - Aug 2025 |
| PDS Resources LLC | Wyoming | 4,495 BBLs | 6,576 MCF | Aug 2023 - Aug 2025 |
| Peak Operating LLC | Kansas | 1,587 BBLs | 0 MCF | Jan 2010 - Jun 2025 |
| Peak Powder River Resources LLC | Wyoming | 79,197 BBLs | 399,466 MCF | Jan 2013 - Aug 2025 |
| Pennington Oil & Gas Int, LLC | Louisiana | 1,787 BBLs | 344 MCF | May 2001 - Dec 2024 |