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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| M G Oil Inc | Kansas | 6,804 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Mack Energy Corp | New Mexico | 177,403 BBLs | 359,161 MCF | Jan 1993 - Feb 2025 |
| Mad Operators LLC | Kansas | 1,738 BBLs | 472 MCF | Jan 2020 - Dec 2024 |
| Magna Operating, LLC | Louisiana | 4,137 BBLs | 0 MCF | Sep 2010 - Dec 2024 |
| Magpie Operating, Inc | Colorado | 24,352 BBLs | 98,795 MCF | Jan 1999 - Jan 2025 |
| Mai Oil Operations, Inc. | Kansas | 43,636 BBLs | 347 MCF | Jan 1980 - Dec 2024 |
| Manzanita Operating, LLC | New Mexico | 5,038 BBLs | 0 MCF | Apr 2022 - Jan 2025 |
| Manzano LLC | New Mexico | 1,856 BBLs | 5,382 MCF | Mar 2005 - Jan 2025 |
| Mar-Lou Oil Co., LLC | Kansas | 1,642 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 182,063 MCF | Jan 1999 - Jan 2025 |
| Marathon Oil Company | North Dakota | 2,692,165 BBLs | 5,421,526 MCF | Jul 1979 - Feb 2025 |
| Marathon Oil Permian LLC | New Mexico | 764,918 BBLs | 2,824,210 MCF | Jul 2017 - Jan 2025 |
| Marlin Exploration, LLC | Louisiana | 2,976 BBLs | 2,082 MCF | Mar 2015 - Jan 2025 |
| Marlin Operating, LLC | New Mexico | 8,597 BBLs | 26,863 MCF | Jan 2022 - Jan 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 | 39,951 BBLs | 101,906 MCF | Jan 1993 - Jan 2025 |
| Matador Production Company | New Mexico | 4,283,114 BBLs | 17,426,991 MCF | Mar 2006 - Jan 2025 |
| Maverick Permian LLC | New Mexico | 133,255 BBLs | 1,178,860 MCF | Jul 2022 - Jan 2025 |
| Maxim Drilling & Expl Inc | Wyoming | 1,563 BBLs | 17,157 MCF | Jun 1982 - Feb 2025 |
| Maximus Operating LTD | Wyoming | 9,469 BBLs | 547 MCF | Jul 2014 - Feb 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 | 15,764 BBLs | 24,458 MCF | Jan 1980 - Dec 2024 |
| McFadden Oil Co. | Kansas | 3,128 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| McGinness Energy Company, Inc. | Kansas | 1,718 BBLs | 41,398 MCF | Jan 2020 - Dec 2024 |
| McGowan Working Partners Inc. | Mississippi | 1,668 BBLs | 2,896 MCF | Dec 1976 - Jan 2025 |
| McGowan Working Partners, Inc. | Arkansas | 5,936 BBLs | 3,081 MCF | Jan 2001 - Jan 2025 |
| McGowan Working Partners, Inc. | Louisiana | 22,202 BBLs | 40,083 MCF | Jan 2001 - Dec 2024 |
| MDS Energy Development LLC | Colorado | 14,114 BBLs | 46,461 MCF | Nov 2022 - Feb 2025 |
| MDS Energy Development LLC | Wyoming | 4,360 BBLs | 3,821 MCF | Jan 2025 - Feb 2025 |
| Me-Tex Oil & Gas Inc | New Mexico | 3,503 BBLs | 20,014 MCF | Jan 1993 - Feb 2025 |
| Medora Minerals, LLC | North Dakota | 8,205 BBLs | 32 MCF | Nov 2018 - Feb 2025 |
| Mega Energy LLC | Wyoming | 0 BBLs | 32,026 MCF | May 2013 - Feb 2025 |
| Mercury Resources LLC | North Dakota | 14,350 BBLs | 0 MCF | Dec 2018 - Feb 2025 |
| Meridian Energy Inc. | Kansas | 4,654 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Merit Energy Company | Wyoming | 421,149 BBLs | 224,543 MCF | Jan 1981 - Jan 2025 |
| Merit Energy Company, LLC | Kansas | 176,507 BBLs | 1,766,647 MCF | Jan 1980 - Dec 2024 |
| Merrion Oil & Gas Corp | Colorado | 304 BBLs | 19,187 MCF | Jan 1999 - Feb 2025 |
| Merrion Oil & Gas Corp | New Mexico | 1,281 BBLs | 102,948 MCF | Jan 1993 - Feb 2025 |
| Merrion Oil & Gas Corporation | Wyoming | 1,157 BBLs | 33,303 MCF | Jan 1978 - Feb 2025 |
| Messenger Petroleum, Inc. | Kansas | 1,333 BBLs | 32,904 MCF | Jan 1980 - Dec 2024 |
| Mewbourne Oil Co | New Mexico | 7,204,578 BBLs | 29,523,057 MCF | Jan 1993 - Jan 2025 |
| Mid-Con Energy Operating LLC | Wyoming | 7,354 BBLs | 1,636 MCF | Feb 2017 - Feb 2025 |
| Mid-Continent Resources, Inc. | Kansas | 1,599 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Mid-South Trading, Inc. | Louisiana | 2,454 BBLs | 0 MCF | Dec 1995 - Jan 2025 |
| Mike Kelso Oil, Inc. | Kansas | 9,367 BBLs | 95,115 MCF | Jan 1980 - Dec 2024 |
| Miller Energy Company II LLC | Michigan | 18,248 BBLs | 0 MCF | Jan 1982 - Dec 2024 |
| Mineral Ventures, Inc. | Louisiana | 687 BBLs | 39,684 MCF | Mar 1998 - Dec 2024 |
| Missaukee Oil And Gas Company LLC | Michigan | 7,417 BBLs | 4,126 MCF | Sep 2019 - Dec 2024 |