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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Northern Lights Oil Company, LLC | Kansas | 1,419 BBLs | 615 MCF | Jan 1980 - Sep 2025 |
| Northern Oil Production, Inc. | Montana | 6,269 BBLs | 2,122 MCF | May 1992 - Nov 2025 |
| Northwestern Corporation | Montana | 416 BBLs | 336,573 MCF | Apr 2004 - Nov 2025 |
| Novo Oil & Gas Northern Delaware, LLC | New Mexico | 503,633 BBLs | 3,403,589 MCF | Feb 2018 - Nov 2025 |
| Nuenergy LLC | Michigan | 1,869 BBLs | 50,409 MCF | Jul 2001 - Nov 2025 |
| Nuevida Resources LLC | Colorado | 0 BBLs | 549,364 MCF | Jul 2023 - Oct 2025 |
| O'Brien Energy Resources Corp. | Kansas | 816 BBLs | 31,770 MCF | May 2008 - Sep 2025 |
| Oasis Petroleum North America LLC | Montana | 43,776 BBLs | 52,675 MCF | Mar 2007 - Nov 2025 |
| Oasis Petroleum North America LLC | North Dakota | 2,566,294 BBLs | 7,014,630 MCF | May 2007 - Nov 2025 |
| Occidental Permian LTD | New Mexico | 424,713 BBLs | 811,988 MCF | Mar 1997 - Nov 2025 |
| Ogris Operating LLC | Colorado | 0 BBLs | 641,682 MCF | Jan 1999 - Oct 2025 |
| Oil Producers, Inc. Of Kansas | Kansas | 6,000 BBLs | 54,208 MCF | Jan 1980 - Sep 2025 |
| Oildigger Resources Fund L LLLP | Wyoming | 4,305 BBLs | 2,750 MCF | Sep 2016 - Nov 2025 |
| Oilfield Salvage & Service Company | Wyoming | 2,542 BBLs | 2,926 MCF | Jan 1978 - Oct 2025 |
| Oleum Energy LLC | New Mexico | 3,122 BBLs | 0 MCF | Aug 2022 - Nov 2025 |
| Olipdp II, LLC | Louisiana | 14,206 BBLs | 54,310 MCF | Jul 2022 - Dec 2024 |
| Opal Operating Company LLC | New Mexico | 3,772 BBLs | 28,229 MCF | Sep 2021 - Nov 2025 |
| Organic Energy Company LLC | Colorado | 2,462 BBLs | 2,858 MCF | Jul 2007 - Nov 2025 |
| 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 | 70 BBLs | 855,458 MCF | Jan 1999 - Oct 2025 |
| Own Resources Operating LLC | Kansas | 0 BBLs | 73,991 MCF | Jan 2010 - Sep 2025 |
| Oxy USA Inc | Colorado | 0 BBLs | 332,619 MCF | Jan 1999 - Oct 2025 |
| Oxy USA Inc | New Mexico | 4,339,373 BBLs | 22,638,588 MCF | Jan 1993 - Nov 2025 |
| Oxy USA Inc. | Kansas | 670 BBLs | 15,127 MCF | Jan 1980 - Sep 2025 |
| P O & G Operating LLC | Colorado | 5,877 BBLs | 0 MCF | Jan 1999 - Oct 2025 |
| P O & G Operating LLC | Wyoming | 12,633 BBLs | 21,023 MCF | Jan 2017 - Oct 2025 |
| P. O. & G. Operating, LLC | Mississippi | 4,249 BBLs | 6,820 MCF | Dec 1976 - Oct 2025 |
| P.O. & G. Operating, LLC | North Dakota | 4,366 BBLs | 1,443 MCF | Jun 2018 - Nov 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 | 1,566 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 |
| Paxton Resources LLC | Michigan | 6,242 BBLs | 0 MCF | Dec 1995 - Dec 2025 |
| Pbex Operations, LLC | New Mexico | 35,429 BBLs | 41,579 MCF | Mar 2025 - Nov 2025 |
| PDC Energy Inc | Colorado | 2,345,214 BBLs | 27,709,524 MCF | Jan 1999 - Nov 2025 |
| PDS Resources LLC | Wyoming | 3,836 BBLs | 6,496 MCF | Aug 2023 - Oct 2025 |
| Peak Operating LLC | Kansas | 1,614 BBLs | 0 MCF | Jan 2010 - Sep 2025 |
| Peak Powder River Resources LLC | Wyoming | 76,098 BBLs | 392,730 MCF | Jan 2013 - Oct 2025 |
| 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 |
| Permian Resources Operating, LLC | New Mexico | 3,476,953 BBLs | 13,129,133 MCF | Jul 2017 - Nov 2025 |
| Petro Operating Company LLC | Colorado | 137,880 BBLs | 821,367 MCF | Jan 1999 - Oct 2025 |
| Petro-Chem Operating Company, Inc. | Louisiana | 3,046 BBLs | 87,053 MCF | Jan 2009 - Dec 2024 |
| Petro-Guard Production, L.L.C. | Louisiana | 3,804 BBLs | 1,779 MCF | Jan 1998 - Dec 2024 |