| 1 | M B ODEGARD | Campbell County, WY | Gas Property | Oct 2014 |
| 2 | M COZZENS | Big Horn County, WY | Oil & Gas Property | Jul 2026 |
| 3 | M D HARRIS | Big Horn County, WY | Oil & Gas Property | Jul 2026 |
| 4 | M DAHILL | Natrona County, WY | Oil & Gas Property | Jun 2025 |
| 5 | M E JONES | Campbell County, WY | Gas Property | Jun 2026 |
| 6 | M MAYCOCK | Campbell County, WY | Gas Property | Jun 2026 |
| 7 | M ODEGARD FED | Campbell County, WY | Gas Property | Apr 2012 |
| 8 | M ODEGARD FED 2 | Campbell County, WY | Gas Property | Oct 2014 |
| 9 | M W NEWBERGER | Sweetwater County, WY | Oil & Gas Property | Jun 2026 |
| 10 | MACCUBBIN 32 | Sheridan County, WY | Gas Property | Jul 2010 |
| 11 | MACINTOSH BE | Big Horn County, WY | Oil Property | Nov 2017 |
| 12 | MACKEY TRUST | Campbell County, WY | Gas Property | Dec 2011 |
| 13 | MACSY | Campbell County, WY | Gas Property | Jan 2008 |
| 14 | MAD HATTER FE | Natrona County, WY | Oil Property | Jun 2026 |
| 15 | MADDEN DEEP UNIT | Fremont County, WY | Oil & Gas Property | Jul 2026 |
| 16 | MADDEN DEEP UNIT | Fremont County, WY | Oil & Gas Property | Jul 2026 |
| 17 | MADELEINE | Washakie County, WY | Oil Property | Jul 2025 |
| 18 | MADISON UNIT | Park County, WY | Oil & Gas Property | Jun 2026 |
| 19 | MADSEN | Converse County, WY | Oil & Gas Property | May 2026 |
| 20 | MADSEN STATE FED 21-36-1 FH | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 21 | MAHONEY | Carbon County, WY | Oil & Gas Property | Aug 1979 |
| 22 | MAHONEY DOME UNIT | Carbon County, WY | Oil & Gas Property | Jun 2026 |
| 23 | MAJEWSKI | Sheridan County, WY | Gas Property | Jun 2015 |
| 24 | MALIBU | Laramie County, WY | Oil & Gas Property | Jun 2026 |
| 25 | MALLI | Campbell County, WY | Gas Property | May 2012 |
| 26 | MALLI | Sheridan County, WY | Gas Property | Jan 2012 |
| 27 | MALTA 2 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 28 | MANDERSON | Big Horn County, WY | Oil & Gas Property | Jul 2026 |
| 29 | MANIGAULT | Campbell County, WY | Gas Property | Jun 2015 |
| 30 | MANIGAULT | Campbell County, WY | Gas Property | Jun 2015 |
| 31 | MANKIN | Campbell County, WY | Gas Property | Jan 2008 |
| 32 | MANKIN | Campbell County, WY | Gas Property | Aug 2012 |
| 33 | MANKIN | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 34 | MANKIN | Campbell County, WY | Oil & Gas Property | Jun 2026 |
| 35 | MANKIN | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 36 | MANNING | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 37 | MANNING | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 38 | MANNING | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 39 | MANNING | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 40 | MANNING | Converse County, WY | Oil & Gas Property | Jun 2026 |
| 41 | MANSFIELD | Sweetwater County, WY | Oil & Gas Property | Jun 2026 |
| 42 | MAPES | Campbell County, WY | Oil Property | Jul 2026 |
| 43 | MAPLE | Campbell County, WY | Oil & Gas Property | Jun 2026 |
| 44 | MAPLE 3 | Converse County, WY | Oil & Gas Property | May 2026 |
| 45 | MARAUDER | Laramie County, WY | Oil & Gas Property | Jun 2026 |
| 46 | MARCIA GAIL | Campbell County, WY | Oil Property | Oct 1994 |
| 47 | MARIANNE | Sweetwater County, WY | Oil & Gas Property | Jun 2026 |
| 48 | MARILYN FEDERAL 14-35 | Crook County, WY | Oil & Gas Property | Jul 2026 |
| 49 | MARILYN STATE 36-69 36 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 50 | MARK ANDERSON | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 51 | MARKER | Weston County, WY | Oil Property | Jul 1988 |
| 52 | MARKER CS STATE | Campbell County, WY | Gas Property | Jul 2016 |
| 53 | MARNA | Campbell County, WY | Oil & Gas Property | Jun 2026 |
| 54 | MARNA KUEHNE | Campbell County, WY | Oil Property | Mar 1994 |
| 55 | MARQUARDT | Laramie County, WY | Oil & Gas Property | Jul 2026 |
| 56 | MARQUISS | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 57 | MARQUISS | Campbell County, WY | Gas Property | Jun 2021 |
| 58 | MARQUISS | Campbell County, WY | Oil & Gas Property | Apr 2022 |
| 59 | MARQUISS FEE 12 | Crook County, WY | Oil Property | Aug 1991 |
| 60 | MARSH & ELLIS 2 | Goshen County, WY | Oil & Gas Property | Jun 2026 |
| 61 | MARSHALL | Crook County, WY | Oil Property | Jun 2026 |
| 62 | MARTIN | Natrona County, WY | Oil Property | Oct 2008 |
| 63 | MARTIN SP | Converse County, WY | Oil & Gas Property | Aug 1995 |
| 64 | MARY 5-3 | Fremont County, WY | Oil & Gas Property | Jul 2026 |
| 65 | MARY BAKER | Weston County, WY | Oil & Gas Property | Jul 2026 |
| 66 | MARY HEY | Campbell County, WY | Gas Property | Jun 2026 |
| 67 | MARYS DRAW | Converse County, WY | Oil & Gas Property | Jun 2026 |
| 68 | MARYS DRAW | Converse County, WY | Oil & Gas Property | Jun 2026 |
| 69 | MARYS DRAW | Converse County, WY | Oil & Gas Property | Jun 2026 |
| 70 | MASK CS FEDERAL | Johnson County, WY | Gas Property | Aug 2018 |
| 71 | MASK CS FEDERAL | Campbell County, WY | Gas Property | Dec 2019 |
| 72 | MASON CS | Johnson County, WY | Gas Property | Dec 2019 |
| 73 | MASS STATE 65-3135 | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 74 | MATHER PEAKS 4074-30-31-1 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 75 | MATHESON | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 76 | MATHESON | Campbell County, WY | Oil & Gas Property | Sep 2016 |
| 77 | MATLOCK | Park County, WY | Oil Property | Jun 2026 |
| 78 | MATTIE | Campbell County, WY | Oil & Gas Property | Apr 2009 |
| 79 | MATTSON RANCH | Laramie County, WY | Oil & Gas Property | Jul 2026 |
| 80 | MAVERICK SPRINGS | Fremont County, WY | Oil Property | Nov 2016 |
| 81 | MAY 1 | Park County, WY | Oil Property | Jun 2026 |
| 82 | MAY 2 | Park County, WY | Oil Property | Jun 2026 |
| 83 | MAY 3 | Park County, WY | Oil Property | Jun 2026 |
| 84 | MAY 5H | Park County, WY | Oil Property | Jun 2026 |
| 85 | MAYNE | Weston County, WY | Oil & Gas Property | Apr 2016 |
| 86 | MBCC 1 | Campbell County, WY | Gas Property | Oct 2007 |
| 87 | MCBETH | Campbell County, WY | Oil & Gas Property | Jul 2026 |
| 88 | MCBETH | Campbell County, WY | Gas Property | Nov 2013 |
| 89 | MCBETH STATE | Campbell County, WY | Gas Property | May 2012 |
| 90 | MCBRIDE FEE | Fremont County, WY | Oil & Gas Property | May 2018 |
| 91 | MCCANN 1 | Campbell County, WY | Gas Property | Nov 2007 |
| 92 | MCCHESNEY | Natrona County, WY | Oil Property | Jul 2026 |
| 93 | MCCLAIN | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 94 | MCCLELLAN | Campbell County, WY | Oil & Gas Property | Aug 1994 |
| 95 | MCCLURE | Weston County, WY | Oil & Gas Property | Jul 2026 |
| 96 | MCCLURE | Campbell County, WY | Oil Property | Jul 2026 |
| 97 | MCCONNAUGHEY | Laramie County, WY | Oil & Gas Property | Jun 2026 |
| 98 | MCCONNELL C | Campbell County, WY | Gas Property | May 2008 |
| 99 | MCCREERY | Campbell County, WY | Oil & Gas Property | Mar 2021 |
| 100 | MCCREERY FEDERALY | Campbell County, WY | Gas Property | Oct 2007 |