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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Mr NM Operating LLC | New Mexico | 9,690 BBLs | 49,844 MCF | Mar 2021 - Feb 2025 |
| MTM Petroleum, Inc. | Kansas | 164 BBLs | 20,181 MCF | Jan 1980 - Dec 2024 |
| Mull Drilling Company Inc | Colorado | 21,899 BBLs | 125,429 MCF | Jan 1999 - Feb 2025 |
| Mull Drilling Company, Inc. | Kansas | 20,490 BBLs | 26,122 MCF | Jan 1980 - Dec 2024 |
| Murex Petroleum Corporation | North Dakota | 174,672 BBLs | 395,414 MCF | Apr 2001 - Feb 2025 |
| Murfin Drilling Co., Inc. | Kansas | 74,361 BBLs | 1,676 MCF | Jan 1980 - Dec 2024 |
| Murphrey Oil Company, Inc. | Louisiana | 3,563 BBLs | 0 MCF | Feb 2020 - Jan 2025 |
| Muskegon Operating Company LLC | Michigan | 23,530 BBLs | 315,592 MCF | Jan 2021 - Feb 2025 |
| Mustang Energy Corporation | Kansas | 4,730 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Mustang Holding, LLC (Finnex) | Alaska | 329 BBLs | 15,587 MCF | Dec 2024 - Mar 2025 |
| Mustang Resources LLC | New Mexico | 559 BBLs | 115,530 MCF | Sep 2018 - Feb 2025 |
| Mustang Resources LLC | Wyoming | 1,166 BBLs | 159,992 MCF | Nov 2014 - Feb 2025 |
| Muzyl Oil Corp | Michigan | 58 BBLs | 161,185 MCF | Nov 2016 - Mar 2025 |
| MWK Petroleum, LLC | Kansas | 2,082 BBLs | 0 MCF | Jan 2020 - Dec 2024 |
| N-10 Exploration, LLC | Kansas | 1,579 BBLs | 49,958 MCF | Jan 2010 - Dec 2024 |
| Nadel And Gussman LLC | Kansas | 1,803 BBLs | 3,189 MCF | Jan 1980 - Dec 2024 |
| Nadel And Gussman Ruston, LLC | Louisiana | 7,961 BBLs | 1,173,013 MCF | Mar 2012 - Dec 2024 |
| Natural Gas Processing Company | Wyoming | 1,431 BBLs | 9,919 MCF | Feb 1978 - Mar 2025 |
| Nautilus Poplar LLC | Montana | 4,571 BBLs | 0 MCF | Jun 2007 - Feb 2025 |
| Navigation Powder River LLC | Wyoming | 15,893 BBLs | 56,236 MCF | Dec 2016 - Feb 2025 |
| Nec Operating - Kansas, LLC | Kansas | 2,630 BBLs | 4,293 MCF | Jan 2020 - Dec 2024 |
| Neptune Operating LLC | North Dakota | 814,598 BBLs | 1,832,815 MCF | Jan 2023 - Feb 2025 |
| New Age Oil LLC | Kansas | 1,402 BBLs | 57 MCF | Feb 1982 - Dec 2024 |
| New Era Petroleum Inc | Wyoming | 1,948 BBLs | 0 MCF | Feb 2010 - Feb 2025 |
| New Millennium Resources, Inc. | North Dakota | 1,360 BBLs | 84 MCF | Apr 2002 - Feb 2025 |
| Nnogc Exploration & Production, LLC | Utah | 16,321 BBLs | 31,059 MCF | Nov 2012 - Feb 2025 |
| Noble Energy Inc | Colorado | 2,286,776 BBLs | 16,913,609 MCF | Jan 1997 - Feb 2025 |
| Norstar Petroleum, Inc. | Kansas | 1,402 BBLs | 129 MCF | Jan 1980 - Dec 2024 |
| North Fork Operating, LP | New Mexico | 3,487 BBLs | 51,904 MCF | Jan 2020 - Feb 2025 |
| North Shore Exploration & Prod LLC | Wyoming | 10,714 BBLs | 716,969 MCF | May 2015 - Feb 2025 |
| North Shore Exploration & Production, LLC | Utah | 0 BBLs | 19,565 MCF | Oct 2019 - Feb 2025 |
| North Silo Resources LLC | Wyoming | 155,234 BBLs | 221,411 MCF | Sep 2019 - Feb 2025 |
| North Slope Borough | Alaska | 0 BBLs | 147,694 MCF | Sep 1950 - Mar 2025 |
| Northern Lights Oil Company, LLC | Kansas | 1,135 BBLs | 570 MCF | Jan 1980 - Dec 2024 |
| Northern Oil Production, Inc. | Montana | 5,124 BBLs | 1,807 MCF | May 1992 - Feb 2025 |
| Northwestern Corporation | Montana | 239 BBLs | 296,863 MCF | Apr 2004 - Feb 2025 |
| Novo Oil & Gas Northern Delaware, LLC | New Mexico | 660,702 BBLs | 4,506,906 MCF | Feb 2018 - Feb 2025 |
| Novy Oil & Gas, Inc. | Kansas | 1,337 BBLs | 7 MCF | Jan 1980 - Dec 2024 |
| Nuevida Resources LLC | Colorado | 0 BBLs | 602,723 MCF | Jul 2023 - Feb 2025 |
| O'Brien Energy Resources Corp. | Kansas | 2,146 BBLs | 33,842 MCF | May 2008 - Dec 2024 |
| Oasis Petroleum North America LLC | Montana | 36,919 BBLs | 47,339 MCF | Mar 2007 - Feb 2025 |
| Oasis Petroleum North America LLC | North Dakota | 2,031,501 BBLs | 5,781,567 MCF | May 2007 - Feb 2025 |
| Occidental Permian LTD | New Mexico | 436,433 BBLs | 1,101,371 MCF | Mar 1997 - Feb 2025 |
| Ogris Operating LLC | Colorado | 0 BBLs | 579,695 MCF | Sep 2020 - Feb 2025 |
| Oil Mountain Energy Inc | Wyoming | 1,287 BBLs | 0 MCF | Oct 2018 - Mar 2025 |
| Oil Producers, Inc. Of Kansas | Kansas | 6,698 BBLs | 42,259 MCF | Jan 1980 - Dec 2024 |
| Oildigger Resources Fund L LLLP | Wyoming | 4,664 BBLs | 3,109 MCF | Sep 2016 - Mar 2025 |
| Oleum Energy LLC | New Mexico | 3,585 BBLs | 0 MCF | Aug 2022 - Feb 2025 |
| Olipdp II, LLC | Louisiana | 14,206 BBLs | 54,310 MCF | Jul 2022 - Dec 2024 |
| Onshore Royalties, LLC | New Mexico | 199 BBLs | 15,949 MCF | Oct 2014 - Feb 2025 |