| 4801 | MACKEY, R | Susquehanna County, PA | Gas Property | Mar 2025 |
| 4802 | MACKRELL UNIT | Butler County, PA | Gas Property | Mar 2025 |
| 4803 | MACLEAN (M-618) | Clearfield County, PA | Gas Property | Dec 2024 |
| 4804 | MACLEOD/NORRIS | Armstrong County, PA | Gas Property | Dec 2024 |
| 4805 | MAD DOG 2020 | Washington County, PA | Gas Property | Mar 2025 |
| 4806 | MAD DOG BRA | Bradford County, PA | Gas Property | Mar 2025 |
| 4807 | MADALYN C. HEILMAN | Armstrong County, PA | Gas Property | Dec 2024 |
| 4808 | MADDEN | Bradford County, PA | Gas Property | Oct 2024 |
| 4809 | MADIGAN FARMS UNIT A 1H | Bradford County, PA | Gas Property | Mar 2025 |
| 4810 | MADISON | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 4811 | MAGA BEA | Beaver County, PA | Gas Property | Mar 2025 |
| 4812 | MAGAGNOTTI | Armstrong County, PA | Gas Property | Dec 2024 |
| 4813 | MAGGIE | Bradford County, PA | Gas Property | Mar 2025 |
| 4814 | MAGGIE SHROKMAN | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 4815 | MAGILL UNIT | Butler County, PA | Oil & Gas Property | Mar 2025 |
| 4816 | MAGNUM | Greene County, PA | Gas Property | Mar 2025 |
| 4817 | MAHAFFEY | Clearfield County, PA | Oil & Gas Property | Dec 2024 |
| 4818 | MAHAN | Warren County, PA | Oil Property | Dec 2016 |
| 4819 | MAHLE | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 4820 | MAHLE | Venango County, PA | Gas Property | Dec 2024 |
| 4821 | MAHLON J BYLER | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 4822 | MAHONING | Lawrence County, PA | Oil & Gas Property | Mar 2025 |
| 4823 | MAHONING | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 4824 | MAHONING AMBROSIA | Lawrence County, PA | Gas Property | Mar 2025 |
| 4825 | MAHONING VALLEY MILLING CO | Jefferson County, PA | Gas Property | Dec 2024 |
| 4826 | MAHONING YEO | Lawrence County, PA | Oil & Gas Property | Mar 2025 |
| 4827 | MAIOLINI | Susquehanna County, PA | Gas Property | Mar 2025 |
| 4828 | MAKAYLA | Bradford County, PA | Gas Property | Mar 2025 |
| 4829 | MAKOSKY T | Susquehanna County, PA | Gas Property | Mar 2025 |
| 4830 | MAKUCH | Venango County, PA | Oil Property | Dec 2021 |
| 4831 | MALACHOSKY | Washington County, PA | Gas Property | Mar 2025 |
| 4832 | MALEK | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 4833 | MALEK | Warren County, PA | Gas Property | Dec 2024 |
| 4834 | MALINKY | Fayette County, PA | Gas Property | Dec 2024 |
| 4835 | MALINKY UNIT | Washington County, PA | Gas Property | Mar 2025 |
| 4836 | MALJOVEC | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 4837 | MALLORY | Venango County, PA | Gas Property | Dec 2024 |
| 4838 | MALLORY | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 4839 | MALLORY | Lycoming County, PA | Gas Property | Mar 2025 |
| 4840 | MALLORY 1 | McKean County, PA | Oil & Gas Property | Dec 2022 |
| 4841 | MALLORY LOT | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 4842 | MALLORY W | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 4843 | MALLORY WARRANT 433 | McKean County, PA | Oil & Gas Property | Dec 2022 |
| 4844 | MALLORY-INTERSTATE | McKean County, PA | Oil & Gas Property | Dec 2022 |
| 4845 | MALLOY | Clearfield County, PA | Gas Property | Dec 2024 |
| 4846 | MAMMA BEAR | Washington County, PA | Gas Property | Mar 2025 |
| 4847 | MAMMOTH PARK 0 | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 4848 | MAMONT SOUTH | Westmoreland County, PA | Gas Property | Mar 2025 |
| 4849 | MANACK | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 4850 | MANAHAN | Bradford County, PA | Gas Property | Mar 2025 |
| 4851 | MANEVAL 296 | Tioga County, PA | Gas Property | Mar 2025 |
| 4852 | MANEY | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 4853 | MANGINI S&M | Westmoreland County, PA | Gas Property | Dec 2024 |
| 4854 | MANNING | Sullivan County, PA | Gas Property | Mar 2025 |
| 4855 | MANNING UNIT REIMILLER 1 MANNING | Wyoming County, PA | Gas Property | Mar 2025 |
| 4856 | MANOR | Indiana County, PA | Gas Property | Dec 2024 |
| 4857 | MANOR DEVELOPMENT | Armstrong County, PA | Gas Property | Dec 2024 |
| 4858 | MANOR REAL EST | McKean County, PA | Gas Property | Dec 2024 |
| 4859 | MANOR REAL ESTATE | Indiana County, PA | Gas Property | Dec 2024 |
| 4860 | MANOR REAL ESTATE | Armstrong County, PA | Gas Property | Dec 2024 |
| 4861 | MANROSS | Forest County, PA | Oil Property | Dec 2024 |
| 4862 | MANSFIELD | Armstrong County, PA | Gas Property | Dec 2024 |
| 4863 | MANTZ | McKean County, PA | Gas Property | Dec 2024 |
| 4864 | MANUEL UNIT | Butler County, PA | Gas Property | Mar 2025 |
| 4865 | MANUFACTURERS GAS | Elk County, PA | Gas Property | Dec 2024 |
| 4866 | MANULIFE INS CO 3 | McKean County, PA | Gas Property | Dec 2024 |
| 4867 | MANZER A 4 | Susquehanna County, PA | Gas Property | Mar 2025 |
| 4868 | MARBACH | Indiana County, PA | Gas Property | Dec 2024 |
| 4869 | MARBAKER | Susquehanna County, PA | Gas Property | Mar 2025 |
| 4870 | MARBURGER FARM DAIRY | Butler County, PA | Gas Property | Mar 2025 |
| 4871 | MARCHAND 3 | Indiana County, PA | Gas Property | Mar 2025 |
| 4872 | MARCHEZAK | Washington County, PA | Gas Property | Dec 2024 |
| 4873 | MARCHEZAK | Washington County, PA | Oil & Gas Property | Mar 2025 |
| 4874 | MARCHINI ZINGIESER | Bradford County, PA | Gas Property | Mar 2025 |
| 4875 | MARCHO W&M | Susquehanna County, PA | Gas Property | Mar 2025 |
| 4876 | MARCO | Westmoreland County, PA | Gas Property | Mar 2025 |
| 4877 | MARCO | Westmoreland County, PA | Gas Property | Dec 2024 |
| 4878 | MARCUCCI JONES | Bradford County, PA | Gas Property | Mar 2025 |
| 4879 | MARGARET | Crawford County, PA | Gas Property | Dec 2024 |
| 4880 | MARGARET | Indiana County, PA | Gas Property | Dec 2024 |
| 4881 | MARGARET | Armstrong County, PA | Gas Property | Dec 2024 |
| 4882 | MARGARET | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 4883 | MARGARET | Butler County, PA | Gas Property | Dec 2024 |
| 4884 | MARGARET E BECK | Indiana County, PA | Gas Property | Dec 2024 |
| 4885 | MARGARET E SHOUP | Greene County, PA | Gas Property | Dec 2022 |
| 4886 | MARGARET HAMILTON | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 4887 | MARGARET L. GIBSON | Indiana County, PA | Gas Property | Dec 2024 |
| 4888 | MARGARIA PAUL UNIT | Washington County, PA | Gas Property | Mar 2025 |
| 4889 | MARGARIA RAYMOND UNIT | Washington County, PA | Gas Property | Mar 2025 |
| 4890 | MARGERY M STEPHENSON | Indiana County, PA | Gas Property | Dec 2024 |
| 4891 | MARIAN | Fayette County, PA | Gas Property | Dec 2024 |
| 4892 | MARIAN J BUTERBAUGH | Indiana County, PA | Gas Property | Dec 2024 |
| 4893 | MARIAN LASKOWSKI | Westmoreland County, PA | Gas Property | Dec 2023 |
| 4894 | MARIE C CAMPBELL | Armstrong County, PA | Gas Property | Dec 2024 |
| 4895 | MARIE FITZSIMMONS | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 4896 | MARIE SNYDER | Clearfield County, PA | Gas Property | Dec 2024 |
| 4897 | MARINI | Armstrong County, PA | Gas Property | Dec 2024 |
| 4898 | MARIS | Susquehanna County, PA | Gas Property | Mar 2025 |
| 4899 | MARJORIE C YANITY | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 4900 | MARK A ANTHONY | Indiana County, PA | Gas Property | Dec 2024 |