| 5301 | MOORE, S | Susquehanna County, PA | Gas Property | Jan 2025 |
| 5302 | MOOSE | Bradford County, PA | Gas Property | Jan 2025 |
| 5303 | MOOSE | Mercer County, PA | Gas Property | Dec 2024 |
| 5304 | MORAVEK | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5305 | MORELAND | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 5306 | MORETZ 03 036 | Bradford County, PA | Gas Property | Jan 2025 |
| 5307 | MORGAN | Warren County, PA | Oil & Gas Property | Dec 2019 |
| 5308 | MORGAN | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 5309 | MORGAN | Armstrong County, PA | Gas Property | Dec 2024 |
| 5310 | MORGAN | Washington County, PA | Oil & Gas Property | Dec 2021 |
| 5311 | MORGAN 01 07 | Bradford County, PA | Gas Property | Jan 2025 |
| 5312 | MORITZ EDWARD UNIT | Washington County, PA | Gas Property | Jan 2025 |
| 5313 | MORRIS | McKean County, PA | Oil Property | Dec 2022 |
| 5314 | MORRIS | Armstrong County, PA | Gas Property | Dec 2024 |
| 5315 | MORRIS STERN | Indiana County, PA | Gas Property | Dec 2021 |
| 5316 | MORRISON | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5317 | MORRISON | Venango County, PA | Oil Property | Dec 1999 |
| 5318 | MORRISON | Warren County, PA | Oil & Gas Property | Dec 2021 |
| 5319 | MORRISON | Warren County, PA | Gas Property | Dec 2024 |
| 5320 | MORRISON RUN LOT 4 | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5321 | MORROW | Greene County, PA | Gas Property | Dec 2024 |
| 5322 | MORROW | Butler County, PA | Gas Property | Jan 2025 |
| 5323 | MORSE | Bradford County, PA | Gas Property | Jan 2025 |
| 5324 | MORTON | Greene County, PA | Oil & Gas Property | Jan 2025 |
| 5325 | MOSER | Lycoming County, PA | Gas Property | Jan 2025 |
| 5326 | MOSER | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5327 | MOSER WARRANT 3767 | McKean County, PA | Oil & Gas Property | Dec 2008 |
| 5328 | MOSHANNON DCNR TRACT 826 | Clearfield County, PA | Gas Property | Dec 2016 |
| 5329 | MOUNTAIN GATHERING | Butler County, PA | Oil & Gas Property | Jan 2025 |
| 5330 | MOUNTAIN MEADOW | Lycoming County, PA | Gas Property | Jan 2025 |
| 5331 | MOUNTAIN RUN HUNTING CLUB 02 153 0 | Tioga County, PA | Gas Property | Feb 2024 |
| 5332 | MOUNTAIN TRAILS INC | Armstrong County, PA | Gas Property | Dec 2024 |
| 5333 | MOURER | Butler County, PA | Oil & Gas Property | Jan 2025 |
| 5334 | MOWL CHARLES 11760 | Washington County, PA | Gas Property | Jan 2025 |
| 5335 | MOWREY | Clearfield County, PA | Gas Property | Dec 2024 |
| 5336 | MOWREY | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5337 | MOWREY MARSHBURG | McKean County, PA | Oil & Gas Property | Dec 2020 |
| 5338 | MOWRY | Bradford County, PA | Gas Property | Jan 2025 |
| 5339 | MOYER BRA | Bradford County, PA | Gas Property | Oct 2024 |
| 5340 | MOYLAN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5341 | MPC SUL | Sullivan County, PA | Gas Property | Jan 2025 |
| 5342 | MROC PAD | McKean County, PA | Gas Property | Oct 2024 |
| 5343 | MT SAVAGE REF | Armstrong County, PA | Gas Property | Dec 2024 |
| 5344 | MT SAVAGE REFRAC | Clarion County, PA | Gas Property | Dec 2024 |
| 5345 | MTL 1 | Bradford County, PA | Gas Property | Jan 2025 |
| 5346 | MTL 4H | Bradford County, PA | Gas Property | Jan 2025 |
| 5347 | MTL 6HC | Bradford County, PA | Gas Property | Jan 2025 |
| 5348 | MUDLICK | Armstrong County, PA | Gas Property | Jan 2025 |
| 5349 | MUDRICK | Washington County, PA | Gas Property | Dec 2024 |
| 5350 | MUELLER | Butler County, PA | Oil & Gas Property | Dec 2019 |
| 5351 | MUIR 8 | Westmoreland County, PA | Gas Property | Jan 2025 |
| 5352 | MULLEN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5353 | MULLOY | Susquehanna County, PA | Gas Property | Jan 2025 |
| 5354 | MUMAU | Indiana County, PA | Gas Property | Dec 2024 |
| 5355 | MUMAU REVOCABLE TRUST 00 | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 5356 | MUMFORD | Crawford County, PA | Gas Property | Dec 2024 |
| 5357 | MUNCE | Washington County, PA | Oil & Gas Property | Jan 2025 |
| 5358 | MUNCE WILLIAM 10060 | Washington County, PA | Gas Property | Jan 2025 |
| 5359 | MUNICIPAL AUTHORITY WESTMORELAND C | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 5360 | MURACCA | Allegheny County, PA | Gas Property | Dec 2024 |
| 5361 | MURDICK-MORGAN | Indiana County, PA | Gas Property | Dec 2024 |
| 5362 | MURDOCK | Erie County, PA | Gas Property | Dec 2024 |
| 5363 | MURIEL HOSTET | Indiana County, PA | Gas Property | Dec 2024 |
| 5364 | MURPHY 110 | Washington County, PA | Gas Property | Dec 2024 |
| 5365 | MURRAY | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 5366 | MURRAY | Tioga County, PA | Gas Property | Jan 2025 |
| 5367 | MURRAY ESTATE | Clearfield County, PA | Gas Property | Dec 2024 |
| 5368 | MURRAY LEVINE | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 5369 | MURRELL STATES | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 5370 | MURRY HEIRS | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 5371 | MUSANTE M | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5372 | MUSGRAVE | Beaver County, PA | Oil & Gas Property | Dec 2023 |
| 5373 | MUSKO | Armstrong County, PA | Gas Property | Dec 2024 |
| 5374 | MUSKOVICH PHILIP 12080 | Washington County, PA | Gas Property | Jan 2025 |
| 5375 | MUSOLINO NV62 | Washington County, PA | Gas Property | Jan 2025 |
| 5376 | MUSSER | Indiana County, PA | Gas Property | Dec 2024 |
| 5377 | MUSSER | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 5378 | MUSSER | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 5379 | MUSSER | Indiana County, PA | Gas Property | Dec 2024 |
| 5380 | MUSSER ASSOCIATES | Indiana County, PA | Gas Property | Dec 2023 |
| 5381 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2024 |
| 5382 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2024 |
| 5383 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2024 |
| 5384 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2024 |
| 5385 | MUTNANSKY UNIT | Fayette County, PA | Gas Property | Jan 2025 |
| 5386 | MUZETTE MS | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 5387 | MV JONES ET UX | Clarion County, PA | Gas Property | Dec 2022 |
| 5388 | MY TB INVESTMENTS LLC 6076 | Tioga County, PA | Gas Property | Jan 2025 |
| 5389 | MYERS | Venango County, PA | Gas Property | Dec 2024 |
| 5390 | MYERS | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5391 | MYERS | Clearfield County, PA | Gas Property | Dec 2024 |
| 5392 | MYERS | Washington County, PA | Gas Property | Dec 2024 |
| 5393 | MYERS | Westmoreland County, PA | Gas Property | Dec 2024 |
| 5394 | MYERS | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5395 | MYERS 00 | Armstrong County, PA | Gas Property | Dec 2024 |
| 5396 | MYERS R | Susquehanna County, PA | Gas Property | Jan 2025 |
| 5397 | MYERS UNIT | Bradford County, PA | Gas Property | Jan 2025 |
| 5398 | MYERS UNIT | Lycoming County, PA | Gas Property | Jan 2025 |
| 5399 | MYERS UNIT | Venango County, PA | Gas Property | Dec 2024 |
| 5400 | MYERS V | Venango County, PA | Oil & Gas Property | Dec 2023 |