| 5001 | MAXSON | Potter County, PA | Gas Property | Dec 2024 |
| 5002 | MAYO | Jefferson County, PA | Gas Property | Dec 2024 |
| 5003 | MAYO LOT | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5004 | MAYS | Clarion County, PA | Oil & Gas Property | Dec 2020 |
| 5005 | MAZURE WILLIAM 12118 | Washington County, PA | Gas Property | May 2025 |
| 5006 | MAZZARA | Wyoming County, PA | Gas Property | May 2025 |
| 5007 | MC ANULTY | Indiana County, PA | Gas Property | Dec 2024 |
| 5008 | MCADOO UNIT | Washington County, PA | Oil & Gas Property | May 2025 |
| 5009 | MCARDLE | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 5010 | MCAWLEY | Armstrong County, PA | Gas Property | Dec 2024 |
| 5011 | MCBETH | Fayette County, PA | Gas Property | Dec 2024 |
| 5012 | MCBETH | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 5013 | MCBROOM 1 | Westmoreland County, PA | Gas Property | May 2025 |
| 5014 | MCC PARTNERS | Washington County, PA | Oil & Gas Property | May 2025 |
| 5015 | MCCABE | Bradford County, PA | Gas Property | May 2025 |
| 5016 | MCCALL UNIT | Butler County, PA | Oil & Gas Property | May 2025 |
| 5017 | MCCALMONT | Butler County, PA | Oil & Gas Property | Dec 2016 |
| 5018 | MCCALMONT | Venango County, PA | Oil Property | Dec 2015 |
| 5019 | MCCARTHY UNIT MCCARTHY 1H | Wyoming County, PA | Gas Property | May 2025 |
| 5020 | MCCARTHY UNIT P&G WAREHOUSE 1 MCCARTHY | Wyoming County, PA | Gas Property | May 2025 |
| 5021 | MCCARTNEY | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5022 | MCCARTY | Sullivan County, PA | Gas Property | May 2025 |
| 5023 | MCCAULEY M | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5024 | MCCAY M-598 | Clearfield County, PA | Gas Property | Dec 2024 |
| 5025 | MCCHESNEY | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5026 | MCCLAIN | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 5027 | MCCLAIN 8 | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 5028 | MCCLAY J | Washington County, PA | Oil Property | Dec 1993 |
| 5029 | MCCLEARY | Jefferson County, PA | Gas Property | Dec 2024 |
| 5030 | MCCLIMANS | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5031 | MCCLOSKEY L | Mercer County, PA | Gas Property | Dec 2024 |
| 5032 | MCCLURE | Greene County, PA | Gas Property | Dec 2024 |
| 5033 | MCCLURE HEIRS | Greene County, PA | Gas Property | Dec 2024 |
| 5034 | MCCLURE M | Jefferson County, PA | Gas Property | Dec 2024 |
| 5035 | MCCONNAUGHEY | Indiana County, PA | Gas Property | Dec 2024 |
| 5036 | MCCONNELL | Indiana County, PA | Gas Property | Dec 2024 |
| 5037 | MCCONNELL | Bradford County, PA | Gas Property | May 2025 |
| 5038 | MCCOOL | Warren County, PA | Oil & Gas Property | Dec 2001 |
| 5039 | MCCOOL & MCCOOL | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5040 | MCCOOL BROS STONEHAM LEASE LOT 466 | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5041 | MCCORMACK | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5042 | MCCORMICK 00 | Indiana County, PA | Gas Property | Dec 2024 |
| 5043 | MCCOY | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 5044 | MCCOY | Clarion County, PA | Oil & Gas Property | Dec 2020 |
| 5045 | MCCOY SMALL | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 5046 | MCCRACKEN | Clearfield County, PA | Gas Property | Dec 2024 |
| 5047 | MCCRADY | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 5048 | MCCREA | Butler County, PA | Gas Property | May 2025 |
| 5049 | MCCREIGHT | Jefferson County, PA | Gas Property | Dec 2023 |
| 5050 | MCCULLOUGH | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5051 | MCCULLOUGH | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 5052 | MCCULLOUGH | Indiana County, PA | Gas Property | Dec 2024 |
| 5053 | MCCULLOUGH | Westmoreland County, PA | Gas Property | May 2025 |
| 5054 | MCCULLOUGH | Mercer County, PA | Oil & Gas Property | May 2025 |
| 5055 | MCCULLOUGH H | Armstrong County, PA | Gas Property | Dec 2024 |
| 5056 | MCCULLOUGH IMOGENE | Armstrong County, PA | Gas Property | Dec 2024 |
| 5057 | MCDANEL BEA | Beaver County, PA | Gas Property | May 2025 |
| 5058 | MCDIVITT | Westmoreland County, PA | Gas Property | Dec 2024 |
| 5059 | MCDONALD | Venango County, PA | Oil Property | Dec 2024 |
| 5060 | MCDONOUGH | Wyoming County, PA | Gas Property | May 2025 |
| 5061 | MCDONOUGH | Washington County, PA | Gas Property | May 2025 |
| 5062 | MCDOWELL | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5063 | MCDOWELL | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5064 | MCELHINNY | Butler County, PA | Oil & Gas Property | May 2025 |
| 5065 | MCELHOES-BUCHANAN | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 5066 | MCELROY | Armstrong County, PA | Gas Property | Dec 2024 |
| 5067 | MCENANEY | Bradford County, PA | Gas Property | May 2025 |
| 5068 | MCFADDEN | Clearfield County, PA | Gas Property | Dec 2024 |
| 5069 | MCFALL UNIT | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5070 | MCFARLAND | Lawrence County, PA | Gas Property | Dec 2024 |
| 5071 | MCFATE | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 5072 | MCGARRELL | Forest County, PA | Oil Property | Dec 2021 |
| 5073 | MCGAUGHEY | Armstrong County, PA | Gas Property | Dec 2024 |
| 5074 | MCGAVIN | Wyoming County, PA | Gas Property | May 2025 |
| 5075 | MCGEE | Clearfield County, PA | Oil & Gas Property | Dec 2024 |
| 5076 | MCGILL | Fayette County, PA | Gas Property | Dec 2024 |
| 5077 | MCGOWAN | Washington County, PA | Gas Property | Dec 2024 |
| 5078 | MCGRAW | Wyoming County, PA | Gas Property | May 2025 |
| 5079 | MCGRAW | Warren County, PA | Gas Property | Dec 2024 |
| 5080 | MCGRAW | Indiana County, PA | Gas Property | Dec 2024 |
| 5081 | MCGROARTY | Bradford County, PA | Gas Property | May 2025 |
| 5082 | MCILVAINE CENTRAL PAD 15 | Westmoreland County, PA | Gas Property | May 2025 |
| 5083 | MCINTIRE | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 5084 | MCINTIRE | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 5085 | MCINTIRE | Indiana County, PA | Gas Property | Dec 2024 |
| 5086 | MCIVER MCALEVY | Crawford County, PA | Gas Property | Dec 2024 |
| 5087 | MCJUNKIN | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 5088 | MCKAY | Armstrong County, PA | Gas Property | Dec 2024 |
| 5089 | MCKAY | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5090 | MCKEAN | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5091 | MCKEAN M | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5092 | MCKEEHEN | Clearfield County, PA | Gas Property | Dec 2024 |
| 5093 | MCKINLEY | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 5094 | MCKOWN M | Warren County, PA | Oil & Gas Property | Dec 2011 |
| 5095 | MCLAUGHLIN | Westmoreland County, PA | Gas Property | Dec 2024 |
| 5096 | MCLAUGHLIN J | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5097 | MCMAHAN S | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5098 | MCMAHON | Bradford County, PA | Gas Property | May 2025 |
| 5099 | MCMASTER UNIT | Washington County, PA | Gas Property | May 2025 |
| 5100 | MCMICHAEL | Beaver County, PA | Gas Property | May 2025 |