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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Mike Kelso Oil, Inc. | Kansas | 8,173 BBLs | 72,014 MCF | Jan 1980 - Sep 2025 |
| Mineral Ventures, Inc. | Louisiana | 687 BBLs | 39,684 MCF | Mar 1998 - Dec 2024 |
| Missouri River Resources ND, LLC | North Dakota | 5,145 BBLs | 25,979 MCF | Nov 2014 - Dec 2025 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 400 BBLs | 739,023 MCF | Aug 1976 - Oct 2025 |
| Mogo Reagan, LLC | Montana | 3,511 BBLs | 11,346 MCF | Nov 2019 - Dec 2025 |
| Molitor Oil, Inc. | Kansas | 806 BBLs | 4,024 MCF | Jan 1980 - Sep 2025 |
| Momentum Operating Co Inc | New Mexico | 478 BBLs | 10,159 MCF | Dec 2000 - Dec 2025 |
| Moncrief W A Jr | Wyoming | 599 BBLs | 20,757 MCF | Jan 1978 - Dec 2025 |
| Montalban Oil & Gas Operations, Inc. | Montana | 2,859 BBLs | 11,722 MCF | Jan 1991 - Dec 2025 |
| Montex Drilling Company LLC | Wyoming | 793 BBLs | 4,867 MCF | Feb 2025 - Dec 2025 |
| Morgan E&P, LLC | North Dakota | 2,750 BBLs | 1,965 MCF | Dec 2023 - Dec 2025 |
| Morgenstern Oil Operations LLC | Kansas | 1,624 BBLs | 0 MCF | Jan 2020 - Sep 2025 |
| Morningstar Operating LLC | Colorado | 0 BBLs | 157,392 MCF | Jun 2001 - Nov 2025 |
| Morningstar Operating LLC | Montana | 377,867 BBLs | 526,077 MCF | Jan 2024 - Dec 2025 |
| Morningstar Operating LLC | New Mexico | 114,690 BBLs | 3,341,327 MCF | Sep 2020 - Dec 2025 |
| Morningstar Operating LLC | North Dakota | 30,840 BBLs | 37,792 MCF | Oct 2024 - Dec 2025 |
| Mosbacher Energy Company | Mississippi | 15,237 BBLs | 6,932 MCF | Dec 1976 - Nov 2025 |
| Mr NM Operating LLC | New Mexico | 7,678 BBLs | 41,755 MCF | Mar 2021 - Dec 2025 |
| MTM Petroleum, Inc. | Kansas | 328 BBLs | 22,012 MCF | Jan 1980 - Sep 2025 |
| Mull Drilling Company Inc | Colorado | 21,941 BBLs | 163,193 MCF | Jan 1999 - Nov 2025 |
| Mull Drilling Company, Inc. | Kansas | 19,414 BBLs | 21,345 MCF | Jan 1980 - Sep 2025 |
| Murex Petroleum Corporation | North Dakota | 212,212 BBLs | 536,641 MCF | Apr 2001 - Dec 2025 |
| Murfin Drilling Co., Inc. | Kansas | 77,721 BBLs | 1,173 MCF | Jan 1980 - Sep 2025 |
| Murfin Drilling Company, Inc. | North Dakota | 10,181 BBLs | 7,320 MCF | Mar 2025 - Dec 2025 |
| Murphrey Oil Company, Inc. | Louisiana | 3,563 BBLs | 0 MCF | Feb 2020 - Jan 2025 |
| Mustang Energy Corporation | Kansas | 2,898 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Mustang Holding, LLC (Finnex) | Alaska | 27,489 BBLs | 32,416 MCF | Dec 2024 - Dec 2025 |
| Mustang Resources LLC | Colorado | 0 BBLs | 15,253 MCF | Jan 1999 - Nov 2025 |
| MWK Petroleum, LLC | Kansas | 1,400 BBLs | 0 MCF | Jan 2020 - Sep 2025 |
| N & B Enterprises, Inc. | Kansas | 0 BBLs | 12,359 MCF | Jan 1981 - Sep 2025 |
| N-10 Exploration, LLC | Kansas | 1,235 BBLs | 35,191 MCF | Jan 2010 - Sep 2025 |
| Nadel And Gussman LLC | Kansas | 1,779 BBLs | 3,024 MCF | Jan 1980 - Sep 2025 |
| Nadel And Gussman Ruston, LLC | Louisiana | 7,961 BBLs | 1,173,013 MCF | Mar 2012 - Dec 2024 |
| Natural Gas & Oil, Inc. | Alabama | 164 BBLs | 8,649 MCF | Oct 1977 - Oct 2025 |
| Natural Gas Processing Company | Wyoming | 719 BBLs | 10,189 MCF | Feb 1978 - Dec 2025 |
| Navigation Powder River LLC | Wyoming | 15,804 BBLs | 65,537 MCF | Dec 2016 - Dec 2025 |
| Nec Operating - Kansas, LLC | Kansas | 1,118 BBLs | 3,007 MCF | Jan 2020 - Sep 2025 |
| Neptune Operating LLC | North Dakota | 692,993 BBLs | 1,660,316 MCF | Jan 2023 - Dec 2025 |
| New Age Oil LLC | Kansas | 2,714 BBLs | 83 MCF | Feb 1982 - Sep 2025 |
| New Century Exploration, Inc. | Louisiana | 468 BBLs | 7,086 MCF | Sep 2005 - Dec 2024 |
| New Era Petroleum Inc | Wyoming | 1,966 BBLs | 0 MCF | Feb 2010 - Dec 2025 |
| New Horizon Resources LLC | Montana | 7,668 BBLs | 474 MCF | Feb 2022 - Dec 2025 |
| Nnogc Exploration & Production, LLC | Utah | 11,842 BBLs | 27,421 MCF | Nov 2012 - Dec 2025 |
| Noble Energy Inc | Colorado | 2,514,925 BBLs | 19,140,351 MCF | Jan 1999 - Dec 2025 |
| Norstar Petroleum, Inc. | Kansas | 1,429 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| North Fork Operating, LP | New Mexico | 3,147 BBLs | 50,734 MCF | Jan 2020 - Dec 2025 |
| North Shore Exploration & Prod LLC | Wyoming | 9,954 BBLs | 267,858 MCF | May 2015 - Dec 2025 |
| North Shore Exploration & Production, LLC | Utah | 140 BBLs | 31,185 MCF | Oct 2019 - Dec 2025 |
| North Shore Exploration And Production LLC | Colorado | 0 BBLs | 13,773 MCF | Jan 1999 - Dec 2025 |
| North Silo Resources LLC | Wyoming | 115,622 BBLs | 196,979 MCF | Sep 2019 - Dec 2025 |