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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Marathon Oil Permian LLC | New Mexico | 958,968 BBLs | 3,243,177 MCF | Jul 2017 - Feb 2025 |
| Marlin Exploration, LLC | Louisiana | 2,976 BBLs | 2,082 MCF | Mar 2015 - Jan 2025 |
| Marlin Operating, LLC | New Mexico | 7,187 BBLs | 21,866 MCF | Jan 2022 - Feb 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 | 34,475 BBLs | 92,072 MCF | Jan 1993 - Feb 2025 |
| Matador Production Company | New Mexico | 3,698,608 BBLs | 15,218,209 MCF | Mar 2006 - Feb 2025 |
| Maverick Permian LLC | New Mexico | 112,565 BBLs | 1,009,668 MCF | Jul 2022 - Feb 2025 |
| Maxim Drilling & Expl Inc | Wyoming | 1,290 BBLs | 16,209 MCF | Jun 1982 - Feb 2025 |
| Maximus Operating LTD | Wyoming | 8,779 BBLs | 451 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 | 24,824 BBLs | 59,203 MCF | Nov 2022 - Feb 2025 |
| MDS Energy Development LLC | Wyoming | 80,250 BBLs | 103,207 MCF | Jan 2025 - Feb 2025 |
| Me-Tex Oil & Gas Inc | New Mexico | 2,939 BBLs | 17,578 MCF | Jan 1993 - Mar 2025 |
| Medora Minerals, LLC | North Dakota | 8,205 BBLs | 32 MCF | Nov 2018 - Feb 2025 |
| Mega Energy LLC | Wyoming | 0 BBLs | 28,981 MCF | May 2013 - Mar 2025 |
| Mercury Resources LLC | North Dakota | 14,350 BBLs | 18,260 MCF | Dec 2018 - Feb 2025 |
| Meridian Energy Inc. | Kansas | 4,654 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Merit Energy Company | Wyoming | 378,808 BBLs | 200,741 MCF | Jan 1981 - Feb 2025 |
| Merit Energy Company, LLC | Kansas | 176,507 BBLs | 1,766,647 MCF | Jan 1980 - Dec 2024 |
| Merrion Oil & Gas Corp | Colorado | 264 BBLs | 17,841 MCF | Jan 1999 - Feb 2025 |
| Merrion Oil & Gas Corp | New Mexico | 1,142 BBLs | 101,315 MCF | Jan 1993 - Feb 2025 |
| Merrion Oil & Gas Corporation | Wyoming | 1,127 BBLs | 51,164 MCF | Jan 1978 - Feb 2025 |
| Messenger Petroleum, Inc. | Kansas | 1,333 BBLs | 32,904 MCF | Jan 1980 - Dec 2024 |
| Mewbourne Oil Co | New Mexico | 7,037,199 BBLs | 27,942,363 MCF | Jan 1993 - Feb 2025 |
| Mid-Con Energy Operating LLC | Wyoming | 7,245 BBLs | 2,271 MCF | Feb 2017 - Mar 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 |
| Midway Energy, LLC | Montana | 1,394 BBLs | 0 MCF | Mar 2019 - Feb 2025 |
| Mike Kelso Oil, Inc. | Kansas | 9,367 BBLs | 95,115 MCF | Jan 1980 - Dec 2024 |
| Miller Energy Company II LLC | Michigan | 16,211 BBLs | 0 MCF | Jan 1982 - Feb 2025 |
| Mineral Ventures, Inc. | Louisiana | 687 BBLs | 39,684 MCF | Mar 1998 - Dec 2024 |
| Missouri River Resources ND, LLC | North Dakota | 5,893 BBLs | 23,890 MCF | Nov 2014 - Feb 2025 |
| MLT Energy, LLC | Kansas | 1,142 BBLs | 0 MCF | Jan 2020 - Dec 2024 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 201 BBLs | 608,059 MCF | Aug 1976 - Feb 2025 |
| Mogo Reagan, LLC | Montana | 2,640 BBLs | 8,478 MCF | Nov 2019 - Feb 2025 |
| Molitor Oil, Inc. | Kansas | 954 BBLs | 4,925 MCF | Jan 1980 - Dec 2024 |
| Moncrief W A Jr | Wyoming | 353 BBLs | 18,256 MCF | Jan 1978 - Feb 2025 |
| Montalban Oil & Gas Operations, Inc. | Montana | 2,174 BBLs | 50,224 MCF | Jan 1991 - Feb 2025 |
| Morningstar Operating LLC | Colorado | 0 BBLs | 169,886 MCF | Jun 2020 - Feb 2025 |
| Morningstar Operating LLC | Montana | 114,746 BBLs | 170,603 MCF | Jan 2024 - Feb 2025 |
| Morningstar Operating LLC | New Mexico | 109,608 BBLs | 2,911,442 MCF | Sep 2020 - Feb 2025 |
| Morningstar Operating LLC | North Dakota | 28,404 BBLs | 35,351 MCF | Oct 2024 - Feb 2025 |