| 4901 | MASTERS | Venango County, PA | Oil Property | Dec 2024 |
| 4902 | MATCHETT FARM 12122 | Washington County, PA | Gas Property | Oct 2025 |
| 4903 | MATEER | Armstrong County, PA | Gas Property | Dec 2024 |
| 4904 | MATEER/SBI | Armstrong County, PA | Gas Property | Dec 2024 |
| 4905 | MATHEWS | Greene County, PA | Oil & Gas Property | Oct 2025 |
| 4906 | MATHEWS UNIT | Crawford County, PA | Gas Property | Dec 2024 |
| 4907 | MATSON | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 4908 | MATSON | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 4909 | MATSON MATSON | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 4910 | MATSON-193 | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 4911 | MATT | Sullivan County, PA | Gas Property | Oct 2025 |
| 4912 | MATT DALE | Westmoreland County, PA | Gas Property | Dec 2024 |
| 4913 | MATT WILL FARMS | Bradford County, PA | Gas Property | Oct 2025 |
| 4914 | MATTESON | Potter County, PA | Gas Property | Dec 2024 |
| 4915 | MATTHEW ANTHONY | Armstrong County, PA | Gas Property | Dec 2024 |
| 4916 | MATTHEW HEIRS | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 4917 | MATTHEW MILLER | Armstrong County, PA | Gas Property | Feb 2025 |
| 4918 | MATTHEWS | Greene County, PA | Oil & Gas Property | Oct 2025 |
| 4919 | MATTIE | Armstrong County, PA | Gas Property | Dec 2024 |
| 4920 | MATTOCKS UNIT MATTOCKS | Wyoming County, PA | Gas Property | Aug 2025 |
| 4921 | MATTY/MOMYER | Westmoreland County, PA | Gas Property | Oct 2025 |
| 4922 | MATWAY | Fayette County, PA | Gas Property | Dec 2024 |
| 4923 | MATZ 824 | Tioga County, PA | Gas Property | Oct 2025 |
| 4924 | MAUDE E. CUMMIN | Armstrong County, PA | Gas Property | Dec 2024 |
| 4925 | MAURICE | Armstrong County, PA | Gas Property | Dec 2024 |
| 4926 | MAURICE M SINAN ET UX | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 4927 | MAVILLA 42 | Washington County, PA | Oil & Gas Property | Dec 2024 |
| 4928 | MAWC TR | Westmoreland County, PA | Gas Property | Dec 2024 |
| 4929 | MAWC TR 1 | Westmoreland County, PA | Gas Property | Dec 2024 |
| 4930 | MAWC TR 2 | Westmoreland County, PA | Gas Property | Oct 2025 |
| 4931 | MAWC TR 51 HUTCHIN | Westmoreland County, PA | Gas Property | Dec 2024 |
| 4932 | MAWC TRACT 3 | Westmoreland County, PA | Gas Property | Dec 2024 |
| 4933 | MAX M LLOYD | Indiana County, PA | Gas Property | Dec 2024 |
| 4934 | MAX M SHOFESTALL | Clarion County, PA | Gas Property | Dec 2024 |
| 4935 | MAX TENN | Armstrong County, PA | Gas Property | Dec 2024 |
| 4936 | MAX THEODORE CRAIG | Indiana County, PA | Gas Property | Dec 2024 |
| 4937 | MAXSON | Potter County, PA | Gas Property | Dec 2024 |
| 4938 | MAYO | Jefferson County, PA | Gas Property | Dec 2024 |
| 4939 | MAYS | Clarion County, PA | Oil & Gas Property | Dec 2020 |
| 4940 | MAZURE WILLIAM 12118 | Washington County, PA | Gas Property | Oct 2025 |
| 4941 | MAZZARA | Wyoming County, PA | Gas Property | Oct 2025 |
| 4942 | MC ANULTY | Indiana County, PA | Gas Property | Dec 2024 |
| 4943 | MCADOO UNIT | Washington County, PA | Oil & Gas Property | Oct 2025 |
| 4944 | MCARDLE | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 4945 | MCAWLEY | Armstrong County, PA | Gas Property | Dec 2024 |
| 4946 | MCBETH | Fayette County, PA | Gas Property | Dec 2024 |
| 4947 | MCBETH | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 4948 | MCBROOM 1 | Westmoreland County, PA | Gas Property | Oct 2025 |
| 4949 | MCC PARTNERS | Washington County, PA | Oil & Gas Property | Oct 2025 |
| 4950 | MCCABE | Bradford County, PA | Gas Property | Oct 2025 |
| 4951 | MCCALL UNIT | Butler County, PA | Oil & Gas Property | Oct 2025 |
| 4952 | MCCALMONT | Venango County, PA | Oil Property | Dec 2015 |
| 4953 | MCCALMONT | Butler County, PA | Oil & Gas Property | Dec 2016 |
| 4954 | MCCARTHY UNIT MCCARTHY 1H | Wyoming County, PA | Gas Property | Oct 2025 |
| 4955 | MCCARTHY UNIT P&G WAREHOUSE 1 MCCARTHY | Wyoming County, PA | Gas Property | Oct 2025 |
| 4956 | MCCARTNEY | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 4957 | MCCARTY | Sullivan County, PA | Gas Property | Oct 2025 |
| 4958 | MCCAULEY M | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 4959 | MCCAY M-598 | Clearfield County, PA | Gas Property | Dec 2024 |
| 4960 | MCCHESNEY | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 4961 | MCCLAIN | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 4962 | MCCLAIN 8 | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 4963 | MCCLAY J | Washington County, PA | Oil Property | Dec 1993 |
| 4964 | MCCLEARY | Jefferson County, PA | Gas Property | Dec 2024 |
| 4965 | MCCLIMANS | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 4966 | MCCLOSKEY L | Mercer County, PA | Gas Property | Dec 2024 |
| 4967 | MCCLURE | Greene County, PA | Gas Property | Dec 2024 |
| 4968 | MCCLURE HEIRS | Greene County, PA | Gas Property | Dec 2024 |
| 4969 | MCCLURE M | Jefferson County, PA | Gas Property | Dec 2024 |
| 4970 | MCCONNAUGHEY | Indiana County, PA | Gas Property | Dec 2024 |
| 4971 | MCCONNELL | Bradford County, PA | Gas Property | Oct 2025 |
| 4972 | MCCONNELL | Indiana County, PA | Gas Property | Dec 2024 |
| 4973 | MCCONNELL UNIT MCCONNELL 1 | Wyoming County, PA | Gas Property | Oct 2025 |
| 4974 | MCCOOL | Warren County, PA | Oil & Gas Property | Dec 2001 |
| 4975 | MCCOOL & MCCOOL | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 4976 | MCCOOL BROS STONEHAM LEASE LOT 466 | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 4977 | MCCORMACK | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 4978 | MCCORMICK 00 | Indiana County, PA | Gas Property | Dec 2024 |
| 4979 | MCCOY | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 4980 | MCCOY | Clarion County, PA | Oil & Gas Property | Dec 2020 |
| 4981 | MCCOY SMALL | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 4982 | MCCRACKEN | Clearfield County, PA | Gas Property | Dec 2024 |
| 4983 | MCCRADY | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 4984 | MCCREA | Butler County, PA | Gas Property | Oct 2025 |
| 4985 | MCCREIGHT | Jefferson County, PA | Gas Property | Dec 2023 |
| 4986 | MCCULLOUGH | Indiana County, PA | Gas Property | Dec 2024 |
| 4987 | MCCULLOUGH | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 4988 | MCCULLOUGH | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 4989 | MCCULLOUGH | Westmoreland County, PA | Gas Property | Oct 2025 |
| 4990 | MCCULLOUGH | Mercer County, PA | Oil & Gas Property | Oct 2025 |
| 4991 | MCCULLOUGH H | Armstrong County, PA | Gas Property | Dec 2024 |
| 4992 | MCCULLOUGH IMOGENE | Armstrong County, PA | Gas Property | Dec 2024 |
| 4993 | MCDANEL BEA | Beaver County, PA | Gas Property | Oct 2025 |
| 4994 | MCDIVITT | Westmoreland County, PA | Gas Property | Dec 2024 |
| 4995 | MCDONOUGH | Washington County, PA | Gas Property | Oct 2025 |
| 4996 | MCDONOUGH | Wyoming County, PA | Gas Property | Oct 2025 |
| 4997 | MCDOWELL | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 4998 | MCDOWELL | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 4999 | MCELHINNY | Butler County, PA | Oil & Gas Property | Oct 2025 |
| 5000 | MCELHOES-BUCHANAN | Indiana County, PA | Oil & Gas Property | Dec 2024 |