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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| North Slope Borough | Alaska | 0 BBLs | 155,925 MCF | Sep 1950 - Dec 2025 |
| Northern Lights Oil Company, LLC | Kansas | 1,419 BBLs | 615 MCF | Jan 1980 - Sep 2025 |
| Northern Oil Production, Inc. | Montana | 5,150 BBLs | 1,652 MCF | May 1992 - Dec 2025 |
| Northwestern Corporation | Montana | 474 BBLs | 348,704 MCF | Apr 2004 - Dec 2025 |
| Novo Oil & Gas Northern Delaware, LLC | New Mexico | 487,289 BBLs | 4,379,821 MCF | Feb 2018 - Dec 2025 |
| Nuevida Resources LLC | Colorado | 0 BBLs | 854,471 MCF | Jul 2023 - Nov 2025 |
| O'Brien Energy Resources Corp. | Kansas | 816 BBLs | 31,770 MCF | May 2008 - Sep 2025 |
| Oasis Petroleum North America LLC | Montana | 42,763 BBLs | 52,395 MCF | Mar 2007 - Dec 2025 |
| Oasis Petroleum North America LLC | North Dakota | 2,438,597 BBLs | 6,861,553 MCF | May 2007 - Dec 2025 |
| Occidental Permian LTD | New Mexico | 436,430 BBLs | 930,871 MCF | Mar 1997 - Dec 2025 |
| Ogris Operating LLC | Colorado | 0 BBLs | 609,689 MCF | Jan 1999 - Nov 2025 |
| Oil Mountain Energy Inc | Wyoming | 1,243 BBLs | 0 MCF | Oct 2018 - Dec 2025 |
| Oil Producers, Inc. Of Kansas | Kansas | 6,000 BBLs | 54,208 MCF | Jan 1980 - Sep 2025 |
| Oil Search (Alaska), LLC | Alaska | 34,673 BBLs | 14,525 MCF | Sep 2023 - Jan 2026 |
| Oildigger Resources Fund L LLLP | Wyoming | 5,403 BBLs | 3,007 MCF | Sep 2016 - Dec 2025 |
| Oilfield Salvage & Service Company | Wyoming | 2,743 BBLs | 2,718 MCF | Jan 1978 - Dec 2025 |
| Oleum Energy LLC | New Mexico | 2,977 BBLs | 0 MCF | Aug 2022 - Dec 2025 |
| Olipdp II, LLC | Louisiana | 14,206 BBLs | 54,310 MCF | Jul 2022 - Dec 2024 |
| Opal Operating Company LLC | New Mexico | 3,912 BBLs | 30,483 MCF | Sep 2021 - Dec 2025 |
| Organic Energy Company LLC | Colorado | 2,316 BBLs | 2,685 MCF | Jul 2007 - Jan 2026 |
| Orx Resources, L.L.C. | Louisiana | 9,403 BBLs | 198,757 MCF | Jan 2010 - Dec 2024 |
| Owens Oil Company, LLC | Kansas | 2,549 BBLs | 0 MCF | Jan 2010 - Sep 2025 |
| Owens Petroleum LLC | Kansas | 1,696 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Own Resources Operating LLC | Colorado | 50 BBLs | 824,692 MCF | Jan 1999 - Dec 2025 |
| Own Resources Operating LLC | Kansas | 0 BBLs | 73,991 MCF | Jan 2010 - Sep 2025 |
| Oxy USA Inc | Colorado | 0 BBLs | 146,643 MCF | Jan 1999 - Nov 2025 |
| Oxy USA Inc | New Mexico | 3,933,860 BBLs | 23,117,281 MCF | Jan 1993 - Dec 2025 |
| Oxy USA Inc. | Kansas | 670 BBLs | 15,127 MCF | Jan 1980 - Sep 2025 |
| Oxy USA WTP Limited Partnership | New Mexico | 31,687 BBLs | 375,941 MCF | Jan 2001 - Dec 2025 |
| P O & G Operating LLC | Colorado | 5,789 BBLs | 0 MCF | Jan 1999 - Nov 2025 |
| P O & G Operating LLC | Wyoming | 7,615 BBLs | 22,322 MCF | Jan 2017 - Nov 2025 |
| P. O. & G. Operating, LLC | Mississippi | 2,628 BBLs | 6,600 MCF | Dec 1976 - Dec 2025 |
| P.O. & G. Operating, LLC | North Dakota | 4,277 BBLs | 1,450 MCF | Jun 2018 - Dec 2025 |
| Palmer Oil, Inc. | Kansas | 2,699 BBLs | 23,856 MCF | Nov 2005 - Sep 2025 |
| Paloma Natural Gas, LLC | Louisiana | 0 BBLs | 12,616,935 MCF | Mar 2022 - Dec 2024 |
| Palomino Petroleum, Inc. | Kansas | 28,424 BBLs | 1,194 MCF | Jan 1980 - Sep 2025 |
| Pantera Energy Company | Kansas | 3,760 BBLs | 420 MCF | Jan 2010 - Sep 2025 |
| Paradigm Energy LLC | Louisiana | 2,262 BBLs | 0 MCF | Dec 2014 - Dec 2024 |
| Parish Operating LLC | Mississippi | 1,718 BBLs | 0 MCF | Jan 2024 - Nov 2025 |
| Patterson Energy LLC | Kansas | 51,132 BBLs | 16 MCF | Jan 2010 - Sep 2025 |
| Pauley Oil | Kansas | 1,785 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Pbex Operations, LLC | New Mexico | 33,790 BBLs | 47,733 MCF | Mar 2025 - Dec 2025 |
| PDC Energy Inc | Colorado | 2,162,975 BBLs | 26,457,729 MCF | Jan 1999 - Nov 2025 |
| PDS Resources LLC | Wyoming | 4,082 BBLs | 6,890 MCF | Aug 2023 - Nov 2025 |
| Peak Operating LLC | Kansas | 1,614 BBLs | 0 MCF | Jan 2010 - Sep 2025 |
| Peak Powder River Resources LLC | Wyoming | 72,972 BBLs | 372,427 MCF | Jan 2013 - Nov 2025 |
| Peakview Operating Company, LLC | Colorado | 1,199 BBLs | 500 MCF | Jan 1999 - Dec 2025 |
| Pedernales Petroleum Operating, LLC | Louisiana | 0 BBLs | 10,907 MCF | Dec 2016 - Dec 2024 |
| Pennington Oil & Gas Int, LLC | Louisiana | 1,787 BBLs | 344 MCF | May 2001 - Dec 2024 |
| Perdido Energy Louisiana, LLC | Louisiana | 6,776 BBLs | 71,845 MCF | Dec 2017 - Dec 2024 |