| 5301 | MOORE FARM | Bradford County, PA | Gas Property | Jun 2025 |
| 5302 | MOORE PARK 12065 | Washington County, PA | Gas Property | Jun 2025 |
| 5303 | MOORE RICHARD UNIT | Washington County, PA | Gas Property | Jun 2025 |
| 5304 | MOORE, S | Susquehanna County, PA | Gas Property | Jun 2025 |
| 5305 | MOOSE | Bradford County, PA | Gas Property | Apr 2025 |
| 5306 | MOOSE | Mercer County, PA | Gas Property | Dec 2024 |
| 5307 | MORAVEK | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5308 | MORELAND | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 5309 | MORETZ 03 036 | Bradford County, PA | Gas Property | Jun 2025 |
| 5310 | MORGAN | Washington County, PA | Oil & Gas Property | Dec 2021 |
| 5311 | MORGAN | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 5312 | MORGAN | Armstrong County, PA | Gas Property | Dec 2024 |
| 5313 | MORGAN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5314 | MORGAN 01 07 | Bradford County, PA | Gas Property | Jun 2025 |
| 5315 | MORITZ EDWARD UNIT | Washington County, PA | Gas Property | Jun 2025 |
| 5316 | MORRIS | Armstrong County, PA | Gas Property | Dec 2024 |
| 5317 | MORRIS | McKean County, PA | Oil Property | Dec 2022 |
| 5318 | MORRIS STERN | Indiana County, PA | Gas Property | Dec 2021 |
| 5319 | MORRISON | Warren County, PA | Gas Property | Dec 2024 |
| 5320 | MORRISON | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5321 | MORRISON | Warren County, PA | Oil & Gas Property | Dec 2021 |
| 5322 | MORRISON | Venango County, PA | Oil Property | Dec 1999 |
| 5323 | MORRISON RUN LOT 4 | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5324 | MORROW | Butler County, PA | Gas Property | Jun 2025 |
| 5325 | MORROW | Greene County, PA | Gas Property | Dec 2024 |
| 5326 | MORSE | Bradford County, PA | Gas Property | Jun 2025 |
| 5327 | MORTON | Greene County, PA | Oil & Gas Property | Jun 2025 |
| 5328 | MOSER | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5329 | MOSER | Lycoming County, PA | Gas Property | Jun 2025 |
| 5330 | MOSER WARRANT 3767 | McKean County, PA | Oil & Gas Property | Dec 2008 |
| 5331 | MOSHANNON DCNR TRACT 826 | Clearfield County, PA | Gas Property | Dec 2016 |
| 5332 | MOUNTAIN GATHERING | Butler County, PA | Oil & Gas Property | Jun 2025 |
| 5333 | MOUNTAIN MEADOW | Lycoming County, PA | Gas Property | Jun 2025 |
| 5334 | MOUNTAIN RUN HUNTING CLUB 02 153 0 | Tioga County, PA | Gas Property | Jun 2025 |
| 5335 | MOUNTAIN TRAILS INC | Armstrong County, PA | Gas Property | Dec 2024 |
| 5336 | MOURER | Butler County, PA | Oil & Gas Property | Jun 2025 |
| 5337 | MOWL CHARLES 11760 | Washington County, PA | Gas Property | Jun 2025 |
| 5338 | MOWREY | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5339 | MOWREY | Clearfield County, PA | Gas Property | Dec 2024 |
| 5340 | MOWREY MARSHBURG | McKean County, PA | Oil & Gas Property | Dec 2020 |
| 5341 | MOWRY | Bradford County, PA | Gas Property | Jun 2025 |
| 5342 | MOYER BRA | Bradford County, PA | Gas Property | Jun 2025 |
| 5343 | MOYLAN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5344 | MPC SUL | Sullivan County, PA | Gas Property | Jun 2025 |
| 5345 | MR COBB TRACT | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5346 | MROC PAD | McKean County, PA | Gas Property | Jun 2025 |
| 5347 | MT SAVAGE REF | Armstrong County, PA | Gas Property | Dec 2024 |
| 5348 | MT SAVAGE REFRAC | Clarion County, PA | Gas Property | Dec 2024 |
| 5349 | MTL 1 | Bradford County, PA | Gas Property | Jun 2025 |
| 5350 | MTL 4H | Bradford County, PA | Gas Property | Jun 2025 |
| 5351 | MTL 6HC | Bradford County, PA | Gas Property | Jun 2025 |
| 5352 | MUDLICK | Armstrong County, PA | Gas Property | Jun 2025 |
| 5353 | MUDRICK | Washington County, PA | Gas Property | Dec 2024 |
| 5354 | MUIR 8 | Westmoreland County, PA | Gas Property | Jun 2025 |
| 5355 | MULLEN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5356 | MULLOY | Susquehanna County, PA | Gas Property | Jun 2025 |
| 5357 | MUMAU | Indiana County, PA | Gas Property | Dec 2024 |
| 5358 | MUMAU REVOCABLE TRUST 00 | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 5359 | MUMFORD | Crawford County, PA | Gas Property | Dec 2024 |
| 5360 | MUNCE | Washington County, PA | Oil & Gas Property | Jun 2025 |
| 5361 | MUNCE WILLIAM 10060 | Washington County, PA | Gas Property | Jun 2025 |
| 5362 | MUNICIPAL AUTHORITY WESTMORELAND C | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 5363 | MURACCA | Allegheny County, PA | Gas Property | Dec 2024 |
| 5364 | MURDICK-MORGAN | Indiana County, PA | Gas Property | Dec 2024 |
| 5365 | MURDOCK | Erie County, PA | Gas Property | Dec 2024 |
| 5366 | MURIEL HOSTET | Indiana County, PA | Gas Property | Dec 2024 |
| 5367 | MURPHY 110 | Washington County, PA | Gas Property | Dec 2024 |
| 5368 | MURRAY | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 5369 | MURRAY | Tioga County, PA | Gas Property | Jun 2025 |
| 5370 | MURRAY ESTATE | Clearfield County, PA | Gas Property | Dec 2024 |
| 5371 | MURRAY LEVINE | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 5372 | MURRELL STATES | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 5373 | MURRY HEIRS | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 5374 | MUSANTE M | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5375 | MUSGRAVE | Beaver County, PA | Oil & Gas Property | Dec 2023 |
| 5376 | MUSKO | Armstrong County, PA | Gas Property | Dec 2024 |
| 5377 | MUSKOVICH PHILIP 12080 | Washington County, PA | Gas Property | Jun 2025 |
| 5378 | MUSOLINO NV62 | Washington County, PA | Gas Property | Jun 2025 |
| 5379 | MUSSER | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 5380 | MUSSER | Indiana County, PA | Gas Property | Dec 2024 |
| 5381 | MUSSER | Indiana County, PA | Gas Property | Dec 2024 |
| 5382 | MUSSER | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 5383 | MUSSER ASSOCIATES | Indiana County, PA | Gas Property | Dec 2023 |
| 5384 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2024 |
| 5385 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2024 |
| 5386 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2024 |
| 5387 | MUSSER FOREST | Indiana County, PA | Gas Property | Dec 2024 |
| 5388 | MUTNANSKY UNIT | Fayette County, PA | Gas Property | Jun 2025 |
| 5389 | MUZETTE MS | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 5390 | MV JONES ET UX | Clarion County, PA | Gas Property | Dec 2022 |
| 5391 | MY TB INVESTMENTS LLC 6076 | Tioga County, PA | Gas Property | Jun 2025 |
| 5392 | MYERS | Washington County, PA | Gas Property | Dec 2024 |
| 5393 | MYERS | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5394 | MYERS | Clearfield County, PA | Gas Property | Dec 2024 |
| 5395 | MYERS | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5396 | MYERS | Venango County, PA | Gas Property | Dec 2024 |
| 5397 | MYERS | Washington County, PA | Gas Property | Dec 2024 |
| 5398 | MYERS | Westmoreland County, PA | Gas Property | Dec 2024 |
| 5399 | MYERS 00 | Armstrong County, PA | Gas Property | Dec 2024 |
| 5400 | MYERS R | Susquehanna County, PA | Gas Property | Jun 2025 |