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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| M G Oil Inc | Kansas | 7,083 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Mack Energy Corp | New Mexico | 174,612 BBLs | 368,881 MCF | Jan 1993 - Nov 2025 |
| Mad Operators LLC | Kansas | 7,609 BBLs | 493 MCF | Jan 2020 - Sep 2025 |
| Magna Operating, LLC | Louisiana | 4,137 BBLs | 0 MCF | Sep 2010 - Dec 2024 |
| Magpie Operating, Inc | Colorado | 19,487 BBLs | 118,938 MCF | Jan 1999 - Oct 2025 |
| Mai Oil Operations, Inc. | Kansas | 45,275 BBLs | 3,676 MCF | Jan 1980 - Sep 2025 |
| Manzanita Operating, LLC | New Mexico | 5,298 BBLs | 0 MCF | Apr 2022 - Nov 2025 |
| Manzano LLC | New Mexico | 7,664 BBLs | 8,551 MCF | Mar 2005 - Nov 2025 |
| Mar-Lou Oil Co., LLC | Kansas | 2,130 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 177,454 MCF | Jan 1999 - Oct 2025 |
| Marathon Oil Company | North Dakota | 2,012,988 BBLs | 4,569,448 MCF | Jul 1979 - Dec 2025 |
| Marathon Oil Permian LLC | New Mexico | 834,148 BBLs | 3,349,816 MCF | Jul 2017 - Nov 2025 |
| Marlin Exploration, LLC | Louisiana | 2,976 BBLs | 2,082 MCF | Mar 2015 - Jan 2025 |
| Marlin Exploration, LLC | Mississippi | 1,505 BBLs | 0 MCF | Dec 1976 - Oct 2025 |
| Marlin Operating, LLC | New Mexico | 38,040 BBLs | 49,549 MCF | Jan 2022 - Nov 2025 |
| Marlin Resources, L.L.C. | Louisiana | 2,463 BBLs | 0 MCF | Apr 2008 - Jan 2025 |
| Marquee Corporation | Louisiana | 1,825 BBLs | 268 MCF | Jun 1990 - Dec 2024 |
| Marshall & Winston Inc | New Mexico | 43,132 BBLs | 113,187 MCF | Jan 1993 - Nov 2025 |
| Matador Production Company | New Mexico | 4,706,525 BBLs | 19,238,615 MCF | Mar 2006 - Nov 2025 |
| Maverick Permian LLC | New Mexico | 126,132 BBLs | 120,274 MCF | Jul 2022 - Nov 2025 |
| Maxim Drilling & Expl Inc | Wyoming | 1,941 BBLs | 15,063 MCF | Jun 1982 - Oct 2025 |
| Maximus Operating LTD | Wyoming | 13,215 BBLs | 870 MCF | Jul 2014 - Nov 2025 |
| Maximus Operating, LTD. | Louisiana | 526 BBLs | 36,971 MCF | Jan 2006 - Jan 2025 |
| McCormick Production Company, Inc. | Louisiana | 4,393 BBLs | 0 MCF | Jan 2009 - Dec 2024 |
| McCoy Petroleum Corporation | Kansas | 29,593 BBLs | 25,451 MCF | Jan 1980 - Sep 2025 |
| McFadden Oil Co. | Kansas | 3,236 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| McGinness Energy Company, Inc. | Kansas | 2,238 BBLs | 39,020 MCF | Jan 2020 - Sep 2025 |
| McGowan Working Partners Inc. | Mississippi | 2,227 BBLs | 3,149 MCF | Dec 1976 - Oct 2025 |
| McGowan Working Partners, Inc. | Louisiana | 22,202 BBLs | 40,083 MCF | Jan 2001 - Dec 2024 |
| MDS Energy Development LLC | Colorado | 10,480 BBLs | 13,663 MCF | Nov 2022 - Oct 2025 |
| MDS Energy Development LLC | Wyoming | 18,530 BBLs | 37,955 MCF | Jan 2025 - Oct 2025 |
| Me-Tex Oil & Gas Inc | New Mexico | 3,791 BBLs | 23,633 MCF | Jan 1993 - Dec 2025 |
| Medora Minerals, LLC | North Dakota | 6,935 BBLs | 39 MCF | Nov 2018 - Dec 2025 |
| Mega Energy LLC | Wyoming | 0 BBLs | 31,263 MCF | May 2013 - Oct 2025 |
| Mercury Resources LLC | North Dakota | 9,103 BBLs | 18,226 MCF | Dec 2018 - Dec 2025 |
| Meridian Energy Inc. | Kansas | 4,450 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Merit Energy Company | Wyoming | 400,883 BBLs | 220,092 MCF | Jan 1981 - Oct 2025 |
| Merit Energy Company, LLC | Kansas | 181,214 BBLs | 1,857,616 MCF | Jan 1980 - Sep 2025 |
| Merrion Oil & Gas Corp | New Mexico | 1,048 BBLs | 99,996 MCF | Jan 1993 - Dec 2025 |
| Merrion Oil & Gas Corporation | Wyoming | 1,375 BBLs | 56,625 MCF | Jan 1978 - Oct 2025 |
| Messenger Petroleum, Inc. | Kansas | 2,311 BBLs | 43,206 MCF | Jan 1980 - Sep 2025 |
| Messer LLC | Colorado | 0 BBLs | 117,589 MCF | Jan 1999 - Nov 2025 |
| Mewbourne Oil Co | New Mexico | 7,602,529 BBLs | 27,859,558 MCF | Jan 1993 - Nov 2025 |
| Mi3 Energy LLC | Wyoming | 18,524 BBLs | 4,315 MCF | Oct 2025 - Oct 2025 |
| Michael D. Weilert Oil Company | Kansas | 1,254 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Mid-Con Energy Operating LLC | Wyoming | 7,338 BBLs | 2,188 MCF | Feb 2017 - Nov 2025 |
| Mid-Continent Resources, Inc. | Kansas | 1,714 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Mid-South Trading, Inc. | Louisiana | 2,454 BBLs | 0 MCF | Dec 1995 - Jan 2025 |
| Mike Kelso Oil, Inc. | Kansas | 8,173 BBLs | 72,014 MCF | Jan 1980 - Sep 2025 |
| Miller Energy Company II LLC | Michigan | 15,977 BBLs | 0 MCF | Jan 1982 - Dec 2025 |