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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Longfellow Energy, LP | New Mexico | 247,579 BBLs | 598,907 MCF | Jul 2017 - Jul 2025 |
| Longs Peak Resources LLC | Colorado | 2,190 BBLs | 1,442 MCF | Feb 2016 - Jul 2025 |
| Longs Peak Resources LLC | Wyoming | 10,488 BBLs | 13,771 MCF | Feb 2016 - Aug 2025 |
| Louisiana Jordan Oil Company, Inc. | Louisiana | 1,207 BBLs | 0 MCF | Jan 2013 - Dec 2024 |
| Luff Exploration Company | North Dakota | 10,439 BBLs | 7,835 MCF | Dec 1996 - Jul 2025 |
| Lynx Operating Co., Inc. | New Mexico | 2,855 BBLs | 2,781 MCF | Jan 1999 - Aug 2025 |
| M & G DRLG Co Inc | New Mexico | 56 BBLs | 59,415 MCF | May 1995 - Jul 2025 |
| M & K Oil Company LLC | Wyoming | 26,261 BBLs | 83,588 MCF | Jan 1978 - Jul 2025 |
| M & M Exploration, Inc. | Kansas | 1,516 BBLs | 18,047 MCF | Mar 2002 - May 2025 |
| M & M Oil Company, L.L.C. | Louisiana | 2,996 BBLs | 0 MCF | Aug 1994 - Jan 2025 |
| M E Klein & Associates, Inc | Kansas | 1,258 BBLs | 4,704 MCF | Jan 1980 - May 2025 |
| M G Oil Inc | Kansas | 6,391 BBLs | 0 MCF | Jan 1980 - May 2025 |
| Mack Energy Corp | New Mexico | 140,934 BBLs | 385,701 MCF | Jan 1993 - Jul 2025 |
| Mad Operators LLC | Kansas | 2,535 BBLs | 506 MCF | Jan 2020 - May 2025 |
| Magna Operating, LLC | Louisiana | 4,137 BBLs | 0 MCF | Sep 2010 - Dec 2024 |
| Magpie Operating, Inc | Colorado | 20,530 BBLs | 113,591 MCF | Jan 1999 - Jul 2025 |
| Mai Oil Operations, Inc. | Kansas | 46,998 BBLs | 300 MCF | Jan 1980 - May 2025 |
| Manzanita Operating, LLC | New Mexico | 5,947 BBLs | 0 MCF | Apr 2022 - Jul 2025 |
| Manzano LLC | New Mexico | 8,642 BBLs | 11,747 MCF | Mar 2005 - Jul 2025 |
| Mar-Lou Oil Co., LLC | Kansas | 2,137 BBLs | 0 MCF | Jan 1980 - May 2025 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 73,107 MCF | Jan 1999 - Jul 2025 |
| Marathon Oil Company | North Dakota | 2,067,980 BBLs | 5,308,567 MCF | Jul 1979 - Jul 2025 |
| Marathon Oil Permian LLC | New Mexico | 1,096,740 BBLs | 3,952,289 MCF | Jul 2017 - Jul 2025 |
| Marlin Exploration, LLC | Louisiana | 2,976 BBLs | 2,082 MCF | Mar 2015 - Jan 2025 |
| Marlin Exploration, LLC | Mississippi | 1,147 BBLs | 0 MCF | Dec 1976 - Jul 2025 |
| Marlin Operating, LLC | New Mexico | 4,619 BBLs | 22,377 MCF | Jan 2022 - Jul 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 | 31,902 BBLs | 99,224 MCF | Jan 1993 - Jul 2025 |
| Matador Production Company | New Mexico | 4,826,391 BBLs | 19,714,906 MCF | Mar 2006 - Jul 2025 |
| Matrix Production Company | Wyoming | 28,558 BBLs | 24,566 MCF | Jan 1994 - Jul 2025 |
| Maxim Drilling & Expl Inc | Wyoming | 1,615 BBLs | 16,474 MCF | Jun 1982 - Jul 2025 |
| Maximus Operating LTD | Wyoming | 11,768 BBLs | 365 MCF | Jul 2014 - Aug 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 | 17,822 BBLs | 19,671 MCF | Jan 1980 - May 2025 |
| McFadden Oil Co. | Kansas | 2,746 BBLs | 0 MCF | Jan 1980 - May 2025 |
| McGinness Energy Company, Inc. | Kansas | 1,263 BBLs | 50,477 MCF | Jan 2020 - May 2025 |
| McGowan Working Partners Inc. | Mississippi | 1,990 BBLs | 3,030 MCF | Dec 1976 - Jul 2025 |
| McGowan Working Partners, Inc. | Louisiana | 22,202 BBLs | 40,083 MCF | Jan 2001 - Dec 2024 |
| MDS Energy Development LLC | Colorado | 12,878 BBLs | 14,044 MCF | Nov 2022 - Jul 2025 |
| MDS Energy Development LLC | Wyoming | 24,312 BBLs | 57,590 MCF | Jan 2025 - Jul 2025 |
| Me-Tex Oil & Gas Inc | New Mexico | 3,701 BBLs | 21,933 MCF | Jan 1993 - Aug 2025 |
| Medora Minerals, LLC | North Dakota | 7,693 BBLs | 10 MCF | Nov 2018 - Jul 2025 |
| Mega Energy LLC | Wyoming | 0 BBLs | 30,748 MCF | May 2013 - Aug 2025 |
| Meridian Energy Inc. | Kansas | 4,942 BBLs | 0 MCF | Jan 1980 - May 2025 |
| Merit Energy Company | Wyoming | 414,084 BBLs | 218,091 MCF | Jan 1981 - Jul 2025 |
| Merit Energy Company, LLC | Kansas | 170,288 BBLs | 1,739,610 MCF | Jan 1980 - May 2025 |
| Merrion Oil & Gas Corp | New Mexico | 760 BBLs | 103,806 MCF | Jan 1993 - Jul 2025 |
| Merrion Oil & Gas Corporation | Wyoming | 1,348 BBLs | 57,063 MCF | Jan 1978 - Jul 2025 |