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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| M G Oil Inc | Kansas | 7,962 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Mack Energy Corp | New Mexico | 140,816 BBLs | 350,932 MCF | Jan 1993 - Oct 2025 |
| Mad Operators LLC | Kansas | 8,225 BBLs | 515 MCF | Jan 2020 - Jun 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 | 47,427 BBLs | 4,293 MCF | Jan 1980 - Jun 2025 |
| Manzanita Operating, LLC | New Mexico | 5,728 BBLs | 0 MCF | Apr 2022 - Oct 2025 |
| Manzano LLC | New Mexico | 9,469 BBLs | 7,934 MCF | Mar 2005 - Nov 2025 |
| Mar-Lou Oil Co., LLC | Kansas | 1,918 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 177,454 MCF | Jan 1999 - Oct 2025 |
| Marathon Oil Company | North Dakota | 2,012,988 BBLs | 4,613,923 MCF | Jul 1979 - Nov 2025 |
| Marathon Oil Permian LLC | New Mexico | 860,519 BBLs | 3,209,955 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 | 47,375 BBLs | 60,534 MCF | Jan 2022 - Oct 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 | 29,358 BBLs | 102,405 MCF | Jan 1993 - Oct 2025 |
| Matador Production Company | New Mexico | 4,822,500 BBLs | 19,626,304 MCF | Mar 2006 - Oct 2025 |
| Maverick Permian LLC | New Mexico | 130,584 BBLs | 117,827 MCF | Jul 2022 - Oct 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 | 19,948 BBLs | 21,408 MCF | Jan 1980 - Jun 2025 |
| McFadden Oil Co. | Kansas | 3,492 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| McGinness Energy Company, Inc. | Kansas | 1,592 BBLs | 49,850 MCF | Jan 2020 - Jun 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 | 3,549 BBLs | 24,462 MCF | Jan 1993 - Nov 2025 |
| Medora Minerals, LLC | North Dakota | 6,935 BBLs | 39 MCF | Nov 2018 - Nov 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 - Nov 2025 |
| Meridian Energy Inc. | Kansas | 5,585 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Merit Energy Company | Wyoming | 400,883 BBLs | 220,092 MCF | Jan 1981 - Oct 2025 |
| Merit Energy Company, LLC | Kansas | 168,247 BBLs | 1,819,034 MCF | Jan 1980 - Jun 2025 |
| Merrion Oil & Gas Corp | New Mexico | 1,124 BBLs | 102,880 MCF | Jan 1993 - Oct 2025 |
| Merrion Oil & Gas Corporation | Wyoming | 1,375 BBLs | 56,625 MCF | Jan 1978 - Oct 2025 |
| Messenger Petroleum, Inc. | Kansas | 1,370 BBLs | 48,861 MCF | Jan 1980 - Jun 2025 |
| Messer LLC | Colorado | 0 BBLs | 117,589 MCF | Jan 1999 - Nov 2025 |
| Mewbourne Oil Co | New Mexico | 8,377,218 BBLs | 29,941,472 MCF | Jan 1993 - Oct 2025 |
| Mi3 Energy LLC | Wyoming | 18,524 BBLs | 4,315 MCF | Oct 2025 - Oct 2025 |
| Michael D. Weilert Oil Company | Kansas | 1,491 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Mid-Con Energy Operating LLC | Wyoming | 7,338 BBLs | 2,188 MCF | Feb 2017 - Nov 2025 |
| Mid-Continent Resources, Inc. | Kansas | 1,279 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Mid-South Trading, Inc. | Louisiana | 2,454 BBLs | 0 MCF | Dec 1995 - Jan 2025 |
| Midco Exploration, Inc. | Kansas | 319 BBLs | 14,743 MCF | Jan 1980 - Jun 2025 |
| Middle Fork Energy Uinta, LLC | Utah | 109,656 BBLs | 7,688,172 MCF | Sep 2018 - Oct 2025 |