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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| NRD - Rein Resources, A General Partnership | Kansas | 1,137 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Nuenergy LLC | Michigan | 1,285 BBLs | 45,474 MCF | Jul 2001 - Mar 2026 |
| Nuevida Resources LLC | Colorado | 0 BBLs | 783,004 MCF | Jul 2023 - Feb 2026 |
| O'Brien Energy Resources Corp. | Kansas | 1,129 BBLs | 28,570 MCF | May 2008 - Jan 2026 |
| Oasis Petroleum North America LLC | Montana | 55,535 BBLs | 59,098 MCF | Mar 2007 - Mar 2026 |
| Oasis Petroleum North America LLC | North Dakota | 2,243,660 BBLs | 6,682,722 MCF | May 2007 - Mar 2026 |
| Occidental Permian LTD | New Mexico | 430,731 BBLs | 828,759 MCF | Mar 1997 - Mar 2026 |
| Ogris Operating LLC | Colorado | 0 BBLs | 557,962 MCF | Jan 1999 - Feb 2026 |
| Oil Mountain Energy Inc | Wyoming | 1,230 BBLs | 0 MCF | Oct 2018 - Mar 2026 |
| Oil Partners, LLC | Kansas | 1,135 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Oil Producers, Inc. Of Kansas | Kansas | 6,929 BBLs | 52,769 MCF | Jan 1980 - Jan 2026 |
| Oildigger Resources Fund L LLLP | Wyoming | 6,665 BBLs | 4,019 MCF | Sep 2016 - Mar 2026 |
| Oilfield Salvage & Service Company | Wyoming | 2,145 BBLs | 2,283 MCF | Jan 1978 - Mar 2026 |
| Olipdp II, LLC | Louisiana | 14,206 BBLs | 54,310 MCF | Jul 2022 - Dec 2024 |
| Omimex Energy Inc | Michigan | 5,421 BBLs | 15,922 MCF | Jan 1982 - Mar 2026 |
| Opal Operating Company LLC | New Mexico | 3,826 BBLs | 31,354 MCF | Sep 2021 - Mar 2026 |
| Organic Energy Company LLC | Colorado | 2,183 BBLs | 2,388 MCF | Jul 2007 - Mar 2026 |
| Orx Resources, L.L.C. | Louisiana | 9,403 BBLs | 198,757 MCF | Jan 2010 - Dec 2024 |
| Owens Oil Company, LLC | Kansas | 2,364 BBLs | 0 MCF | Jan 2010 - Jan 2026 |
| Owens Petroleum LLC | Kansas | 1,812 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Own Resources Operating LLC | Colorado | 72 BBLs | 767,853 MCF | Jan 1999 - Feb 2026 |
| Own Resources Operating LLC | Kansas | 147 BBLs | 75,245 MCF | Jan 2010 - Jan 2026 |
| Oxy USA Inc | Colorado | 0 BBLs | 164,672 MCF | Jan 1999 - Feb 2026 |
| Oxy USA Inc | New Mexico | 3,567,146 BBLs | 22,851,896 MCF | Jan 1993 - Mar 2026 |
| Oxy USA Inc. | Kansas | 722 BBLs | 13,972 MCF | Jan 1980 - Jan 2026 |
| Oxy USA WTP Limited Partnership | New Mexico | 28,020 BBLs | 408,035 MCF | Jan 2001 - Mar 2026 |
| P. O. & G. Operating LLC | Mississippi | 1,544 BBLs | 6,820 MCF | Dec 1976 - Mar 2026 |
| P.O. & G. Operating, LLC | North Dakota | 4,787 BBLs | 1,450 MCF | Jun 2018 - Mar 2026 |
| Palmer Oil, Inc. | Kansas | 2,732 BBLs | 24,815 MCF | Nov 2005 - Jan 2026 |
| Palo Alto Energy, LLC | North Dakota | 1,635 BBLs | 0 MCF | Dec 2025 - Mar 2026 |
| Paloma Natural Gas, LLC | Louisiana | 0 BBLs | 12,616,935 MCF | Mar 2022 - Dec 2024 |
| Palomino Petroleum, Inc. | Kansas | 29,517 BBLs | 2,810 MCF | Jan 1980 - Jan 2026 |
| Pantera Energy Company | Kansas | 4,846 BBLs | 355 MCF | Jan 2010 - Jan 2026 |
| Paradigm Energy LLC | Louisiana | 2,262 BBLs | 0 MCF | Dec 2014 - Dec 2024 |
| Patterson Energy LLC | Kansas | 59,832 BBLs | 913 MCF | Jan 2010 - Jan 2026 |
| Paul Bowman Oil Trust | Kansas | 1,896 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Pauley Oil | Kansas | 2,934 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Paxton Resources LLC | Michigan | 5,938 BBLs | 0 MCF | Dec 1995 - Apr 2026 |
| PDC Energy Inc | Colorado | 1,804,848 BBLs | 25,327,654 MCF | Jan 1999 - Feb 2026 |
| PDS Resources LLC | Wyoming | 4,258 BBLs | 5,476 MCF | Aug 2023 - Mar 2026 |
| Peak Operating LLC | Kansas | 1,781 BBLs | 0 MCF | Jan 2010 - Jan 2026 |
| Peak Powder River Resources LLC | Wyoming | 75,496 BBLs | 368,078 MCF | Jan 2013 - Mar 2026 |
| 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 | 3,299,036 BBLs | 13,903,744 MCF | Jul 2017 - Mar 2026 |
| Petro Operating Company LLC | Colorado | 67,516 BBLs | 763,135 MCF | Jan 1999 - Feb 2026 |
| 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 |
| Petro-Hunt Dakota, LLC | North Dakota | 78,118 BBLs | 114,864 MCF | Dec 2016 - Mar 2026 |
| Petro-Hunt, L.L.C. | Louisiana | 3,950 BBLs | 2,594 MCF | Apr 1998 - Dec 2024 |