| Property Name | Property Location | Property Type | Most Recent Production | |
|---|---|---|---|---|
| 101 | MAMMA BEAR | Washington County, PA | Gas Property | May 2025 |
| 102 | MAMMOTH PARK 0 | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 103 | MAMONT SOUTH | Westmoreland County, PA | Gas Property | May 2025 |
| 104 | MANACK | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 105 | MANAHAN | Bradford County, PA | Gas Property | May 2025 |
| 106 | MANEVAL 296 | Tioga County, PA | Gas Property | May 2025 |
| 107 | MANEY | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 108 | MANGINI S&M | Westmoreland County, PA | Gas Property | Dec 2024 |
| 109 | MANNING | Sullivan County, PA | Gas Property | May 2025 |
| 110 | MANNING UNIT REIMILLER 1 MANNING | Wyoming County, PA | Gas Property | May 2025 |
| 111 | MANOR | Indiana County, PA | Gas Property | Dec 2024 |
| 112 | MANOR DEVELOPMENT | Armstrong County, PA | Gas Property | Dec 2024 |
| 113 | MANOR REAL EST | McKean County, PA | Gas Property | Dec 2024 |
| 114 | MANOR REAL ESTATE | Indiana County, PA | Gas Property | Dec 2024 |
| 115 | MANOR REAL ESTATE | Armstrong County, PA | Gas Property | Dec 2024 |
| 116 | MANROSS | Forest County, PA | Oil Property | Dec 2024 |
| 117 | MANSFIELD | Armstrong County, PA | Gas Property | Dec 2024 |
| 118 | MANTZ | McKean County, PA | Gas Property | Dec 2024 |
| 119 | MANUEL UNIT | Butler County, PA | Gas Property | May 2025 |
| 120 | MANUFACTURERS GAS | Elk County, PA | Gas Property | Dec 2024 |
| 121 | MANULIFE INS CO 3 | McKean County, PA | Gas Property | Dec 2024 |
| 122 | MANZER A 4 | Susquehanna County, PA | Gas Property | May 2025 |
| 123 | MARBACH | Indiana County, PA | Gas Property | Dec 2024 |
| 124 | MARBAKER | Susquehanna County, PA | Gas Property | May 2025 |
| 125 | MARBURGER FARM DAIRY | Butler County, PA | Gas Property | May 2025 |
| 126 | MARCHAND 3 | Indiana County, PA | Gas Property | May 2025 |
| 127 | MARCHEZAK | Washington County, PA | Gas Property | Dec 2024 |
| 128 | MARCHEZAK | Washington County, PA | Oil & Gas Property | May 2025 |
| 129 | MARCHINI ZINGIESER | Bradford County, PA | Gas Property | May 2025 |
| 130 | MARCHO W&M | Susquehanna County, PA | Gas Property | May 2025 |
| 131 | MARCO | Westmoreland County, PA | Gas Property | May 2025 |
| 132 | MARCO | Westmoreland County, PA | Gas Property | Dec 2024 |
| 133 | MARCUCCI JONES | Bradford County, PA | Gas Property | May 2025 |
| 134 | MARGARET | Crawford County, PA | Gas Property | Dec 2024 |
| 135 | MARGARET | Indiana County, PA | Gas Property | Dec 2024 |
| 136 | MARGARET | Armstrong County, PA | Gas Property | Dec 2024 |
| 137 | MARGARET | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 138 | MARGARET | Butler County, PA | Gas Property | Dec 2024 |
| 139 | MARGARET E BECK | Indiana County, PA | Gas Property | Dec 2024 |
| 140 | MARGARET E SHOUP | Greene County, PA | Gas Property | Dec 2022 |
| 141 | MARGARET HAMILTON | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 142 | MARGARET L. GIBSON | Indiana County, PA | Gas Property | Dec 2024 |
| 143 | MARGARIA PAUL UNIT | Washington County, PA | Gas Property | May 2025 |
| 144 | MARGARIA RAYMOND UNIT | Washington County, PA | Gas Property | May 2025 |
| 145 | MARGERY M STEPHENSON | Indiana County, PA | Gas Property | Dec 2024 |
| 146 | MARIAN | Fayette County, PA | Gas Property | Dec 2024 |
| 147 | MARIAN J BUTERBAUGH | Indiana County, PA | Gas Property | Dec 2024 |
| 148 | MARIAN LASKOWSKI | Westmoreland County, PA | Gas Property | Dec 2023 |
| 149 | MARIE C CAMPBELL | Armstrong County, PA | Gas Property | Dec 2024 |
| 150 | MARIE FITZSIMMONS | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 151 | MARIE SNYDER | Clearfield County, PA | Gas Property | Dec 2024 |
| 152 | MARINI | Armstrong County, PA | Gas Property | Dec 2024 |
| 153 | MARIS | Susquehanna County, PA | Gas Property | May 2025 |
| 154 | MARJORIE C YANITY | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 155 | MARK A ANTHONY | Indiana County, PA | Gas Property | Dec 2024 |
| 156 | MARK A ANTHONY | Indiana County, PA | Gas Property | Dec 2024 |
| 157 | MARK A SNYDER ET UX | Armstrong County, PA | Gas Property | Dec 2024 |
| 158 | MARK E DIXON | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 159 | MARK FEILING | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 160 | MARK M STEPHENSON | Indiana County, PA | Gas Property | Dec 2024 |
| 161 | MARK REED MONTGOMERY | Jefferson County, PA | Gas Property | Dec 2024 |
| 162 | MARK W & RUTH W SIMPSON | Indiana County, PA | Gas Property | Dec 2024 |
| 163 | MARK WITHEROW | Clearfield County, PA | Gas Property | Dec 2024 |
| 164 | MARKLE | Westmoreland County, PA | Oil & Gas Property | May 2025 |
| 165 | MARKOVITCH | Susquehanna County, PA | Gas Property | May 2025 |
| 166 | MARLIN B STEPHENS | Indiana County, PA | Gas Property | Dec 2024 |
| 167 | MARLIN FUNKA | Washington County, PA | Oil & Gas Property | May 2025 |
| 168 | MARQUARDT | Lycoming County, PA | Gas Property | May 2025 |
| 169 | MARSH | Indiana County, PA | Gas Property | Dec 2024 |
| 170 | MARSH | Indiana County, PA | Gas Property | Dec 2024 |
| 171 | MARSH | Mercer County, PA | Gas Property | Dec 2024 |
| 172 | MARSHALL | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 173 | MARSHALL | Indiana County, PA | Gas Property | Dec 2024 |
| 174 | MARSHALL A DANIELSON | Warren County, PA | Gas Property | Dec 2024 |
| 175 | MARSHALL HEIRS | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 176 | MARSHALL-BELL UNIT | Clearfield County, PA | Gas Property | Dec 2024 |
| 177 | MARSHLANDS UNIT | Tioga County, PA | Gas Property | May 2025 |
| 178 | MARSUN | Crawford County, PA | Gas Property | Dec 2024 |
| 179 | MARTHA ARNOLD MILLS | Indiana County, PA | Gas Property | Dec 2024 |
| 180 | MARTHA EARHART | Westmoreland County, PA | Gas Property | Dec 2024 |
| 181 | MARTHA MALES 125 A | Clarion County, PA | Gas Property | Dec 2024 |
| 182 | MARTIN | Bradford County, PA | Gas Property | May 2025 |
| 183 | MARTIN | Bradford County, PA | Gas Property | May 2025 |
| 184 | MARTIN | Mercer County, PA | Gas Property | Dec 2024 |
| 185 | MARTIN | Jefferson County, PA | Gas Property | Dec 2024 |
| 186 | MARTIN | Crawford County, PA | Gas Property | Dec 2024 |
| 187 | MARTIN | Westmoreland County, PA | Gas Property | Dec 2024 |
| 188 | MARTIN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 189 | MARTIN | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 190 | MARTIN | Armstrong County, PA | Gas Property | Dec 2024 |
| 191 | MARTIN | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 192 | MARTIN | Washington County, PA | Oil Property | Dec 2005 |
| 193 | MARTIN BEARER | Cambria County, PA | Gas Property | Dec 2024 |
| 194 | MARTIN C. TATE | Clearfield County, PA | Gas Property | Dec 2024 |
| 195 | MARTIN EDWARD 12273 | Washington County, PA | Gas Property | May 2025 |
| 196 | MARTIN FONNER | Greene County, PA | Oil & Gas Property | Dec 2024 |
| 197 | MARTIN L BEARER | Cambria County, PA | Gas Property | Dec 2024 |
| 198 | MARTIN L BEARER | Indiana County, PA | Gas Property | Dec 2024 |
| 199 | MARTIN L BEARER | Indiana County, PA | Gas Property | Dec 2024 |
| 200 | MARTIN MARIETTA CORP | Preston County, WV | Gas Property | Dec 2019 |