| 5401 | MORETZ 03 036 | Bradford County, PA | Gas Property | Dec 2025 |
| 5402 | MORGAN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5403 | MORGAN | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 5404 | MORGAN | Armstrong County, PA | Gas Property | Dec 2025 |
| 5405 | MORGAN | Washington County, PA | Oil & Gas Property | Dec 2021 |
| 5406 | MORGAN 01 07 | Bradford County, PA | Gas Property | Dec 2025 |
| 5407 | MORITZ EDWARD UNIT | Washington County, PA | Gas Property | Dec 2025 |
| 5408 | MORRIS | McKean County, PA | Oil Property | Dec 2022 |
| 5409 | MORRIS | Armstrong County, PA | Gas Property | Dec 2025 |
| 5410 | MORRIS STERN | Indiana County, PA | Gas Property | Dec 2021 |
| 5411 | MORRISON | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 5412 | MORRISON | Venango County, PA | Oil Property | Dec 1999 |
| 5413 | MORRISON | Warren County, PA | Oil & Gas Property | Dec 2021 |
| 5414 | MORRISON | Warren County, PA | Gas Property | Dec 2024 |
| 5415 | MORRISON RUN LOT 4 | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 5416 | MORROW | Greene County, PA | Gas Property | Dec 2025 |
| 5417 | MORROW | Butler County, PA | Gas Property | Dec 2025 |
| 5418 | MORSE | Bradford County, PA | Gas Property | Dec 2025 |
| 5419 | MORTON | Greene County, PA | Oil & Gas Property | Dec 2025 |
| 5420 | MOSER | Lycoming County, PA | Gas Property | Dec 2025 |
| 5421 | MOSER | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 5422 | MOSER WARRANT 3767 | McKean County, PA | Oil & Gas Property | Dec 2008 |
| 5423 | MOSHANNON DCNR TRACT 826 | Clearfield County, PA | Gas Property | Dec 2016 |
| 5424 | MOUNTAIN GATHERING | Butler County, PA | Oil & Gas Property | Dec 2025 |
| 5425 | MOUNTAIN MEADOW | Lycoming County, PA | Gas Property | Dec 2025 |
| 5426 | MOUNTAIN RUN HUNTING CLUB 02 153 0 | Tioga County, PA | Gas Property | Dec 2025 |
| 5427 | MOUNTAIN TRAILS INC | Armstrong County, PA | Gas Property | Dec 2025 |
| 5428 | MOURER | Butler County, PA | Oil & Gas Property | Dec 2025 |
| 5429 | MOWL CHARLES 11760 | Washington County, PA | Gas Property | Dec 2025 |
| 5430 | MOWREY | Clearfield County, PA | Gas Property | Dec 2025 |
| 5431 | MOWREY | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 5432 | MOWREY MARSHBURG | McKean County, PA | Oil & Gas Property | Dec 2020 |
| 5433 | MOWRY | Bradford County, PA | Gas Property | Dec 2025 |
| 5434 | MOYER BRA | Bradford County, PA | Gas Property | Dec 2025 |
| 5435 | MOYLAN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5436 | MPC SUL | Sullivan County, PA | Gas Property | Dec 2025 |
| 5437 | MR COBB TRACT | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 5438 | MROC PAD | McKean County, PA | Gas Property | Dec 2025 |
| 5439 | MT SAVAGE REF | Armstrong County, PA | Gas Property | Dec 2025 |
| 5440 | MT SAVAGE REFRAC | Clarion County, PA | Gas Property | Dec 2025 |
| 5441 | MTL 1 | Bradford County, PA | Gas Property | Dec 2025 |
| 5442 | MTL 4H | Bradford County, PA | Gas Property | Dec 2025 |
| 5443 | MTL 6HC | Bradford County, PA | Gas Property | Dec 2025 |
| 5444 | MUDLICK | Armstrong County, PA | Gas Property | Dec 2025 |
| 5445 | MUDRICK | Washington County, PA | Gas Property | Dec 2025 |
| 5446 | MUELLER | Butler County, PA | Oil & Gas Property | Dec 2025 |
| 5447 | MUIR 8 | Westmoreland County, PA | Gas Property | Dec 2025 |
| 5448 | MULLEN | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 5449 | MULLOY | Susquehanna County, PA | Gas Property | Dec 2025 |
| 5450 | MUMAU | Indiana County, PA | Gas Property | Dec 2025 |
| 5451 | MUMAU REVOCABLE TRUST 00 | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 5452 | MUMFORD | Crawford County, PA | Gas Property | Dec 2025 |
| 5453 | MUNCE | Washington County, PA | Oil & Gas Property | Dec 2025 |
| 5454 | MUNCE WILLIAM 10060 | Washington County, PA | Gas Property | Dec 2025 |
| 5455 | MUNICIPAL AUTHORITY WESTMORELAND C | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 5456 | MURACCA | Allegheny County, PA | Gas Property | Dec 2025 |
| 5457 | MURDICK-MORGAN | Indiana County, PA | Gas Property | Dec 2025 |
| 5458 | MURDOCK | Erie County, PA | Gas Property | Dec 2025 |
| 5459 | MURIEL HOSTET | Indiana County, PA | Gas Property | Dec 2025 |
| 5460 | MURPHY 07 075 0 | Susquehanna County, PA | Gas Property | Dec 2025 |
| 5461 | MURPHY 110 | Washington County, PA | Gas Property | Dec 2024 |
| 5462 | MURRAY | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 5463 | MURRAY | Tioga County, PA | Gas Property | Dec 2025 |
| 5464 | MURRAY ESTATE | Clearfield County, PA | Gas Property | Dec 2025 |
| 5465 | MURRAY LEVINE | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 5466 | MURRELL STATES | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 5467 | MURRY HEIRS | Allegheny County, PA | Oil & Gas Property | Dec 2025 |
| 5468 | MUSANTE M | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 5469 | MUSGRAVE | Beaver County, PA | Oil & Gas Property | Dec 2023 |
| 5470 | MUSKO | Armstrong County, PA | Gas Property | Dec 2025 |
| 5471 | MUSKOVICH PHILIP 12080 | Washington County, PA | Gas Property | Dec 2025 |
| 5472 | MUSOLINO NV62 | Washington County, PA | Gas Property | Dec 2025 |
| 5473 | MUSSER | Indiana County, PA | Gas Property | Dec 2025 |
| 5474 | MUSSER | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 5475 | MUSSER | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 5476 | MUSSER | Indiana County, PA | Gas Property | Dec 2025 |
| 5477 | MUSSER ASSOCIATES | Indiana County, PA | Gas Property | Dec 2023 |
| 5478 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2025 |
| 5479 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2025 |
| 5480 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2025 |
| 5481 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2025 |
| 5482 | MUTNANSKY UNIT | Fayette County, PA | Gas Property | Dec 2025 |
| 5483 | MUZETTE MS | Forest County, PA | Oil & Gas Property | Dec 2025 |
| 5484 | MV JONES ET UX | Clarion County, PA | Gas Property | Dec 2022 |
| 5485 | MY TB INVESTMENTS LLC 6076 | Tioga County, PA | Gas Property | Dec 2025 |
| 5486 | MYERS | Venango County, PA | Gas Property | Dec 2025 |
| 5487 | MYERS | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 5488 | MYERS | Clearfield County, PA | Gas Property | Dec 2025 |
| 5489 | MYERS | Washington County, PA | Gas Property | Dec 2025 |
| 5490 | MYERS | Westmoreland County, PA | Gas Property | Dec 2025 |
| 5491 | MYERS | Washington County, PA | Gas Property | Dec 2025 |
| 5492 | MYERS | Mercer County, PA | Oil & Gas Property | Dec 2025 |
| 5493 | MYERS 00 | Armstrong County, PA | Gas Property | Dec 2025 |
| 5494 | MYERS R | Susquehanna County, PA | Gas Property | Dec 2025 |
| 5495 | MYERS UNIT | Bradford County, PA | Gas Property | Dec 2025 |
| 5496 | MYERS UNIT | Lycoming County, PA | Gas Property | Dec 2025 |
| 5497 | MYERS UNIT | Venango County, PA | Gas Property | Dec 2024 |
| 5498 | MYERS V | Venango County, PA | Oil & Gas Property | Dec 2023 |
| 5499 | MYRTLE MACKENDRICK | Indiana County, PA | Gas Property | Dec 2025 |
| 5500 | MYRTLE SHUMAKER | Armstrong County, PA | Gas Property | Dec 2025 |