| 5601 | OMR (02-188 | Tioga County, PA | Gas Property | Jun 2025 |
| 5602 | ONEIL | Warren County, PA | Oil Property | Dec 2024 |
| 5603 | ONEILL | Warren County, PA | Oil Property | Dec 2024 |
| 5604 | ONIFRO O | McKean County, PA | Oil & Gas Property | Dec 2005 |
| 5605 | OPACIC | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 5606 | ORENCHUK RUSSELL 11890 | Washington County, PA | Gas Property | Jun 2025 |
| 5607 | ORIN LEE NEAL | Jefferson County, PA | Gas Property | Dec 2024 |
| 5608 | ORIS | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 5609 | ORIS M. SCHRECENGOST | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 5610 | ORLANDO HARMAN | Armstrong County, PA | Gas Property | Dec 2024 |
| 5611 | ORLOSKY | Mercer County, PA | Gas Property | Dec 2024 |
| 5612 | ORMSBY DEVONIAN | McKean County, PA | Gas Property | Dec 1993 |
| 5613 | OROURKE 05 046 0 | Bradford County, PA | Gas Property | Jun 2025 |
| 5614 | ORR 1 | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 5615 | ORR 2 | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 5616 | ORR 3 | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 5617 | ORTH B | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5618 | ORTHODOX | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 5619 | ORTON | Washington County, PA | Oil & Gas Property | Apr 2023 |
| 5620 | ORTON | Erie County, PA | Gas Property | Dec 1986 |
| 5621 | ORVILLE | Indiana County, PA | Gas Property | Dec 2024 |
| 5622 | ORVILLE M WATSON | Indiana County, PA | Gas Property | Dec 2024 |
| 5623 | ORVILLE W. PRESCOTT | Clearfield County, PA | Gas Property | Dec 2008 |
| 5624 | ORWICK | Clearfield County, PA | Gas Property | Dec 2024 |
| 5625 | OS BURNHAM | Crawford County, PA | Gas Property | Dec 2017 |
| 5626 | OSCAR B GRANT | Elk County, PA | Oil & Gas Property | Dec 2024 |
| 5627 | OSCAR C BENSON | Jefferson County, PA | Gas Property | Dec 2024 |
| 5628 | OSCAR EARL HOUSER | Armstrong County, PA | Gas Property | Dec 2024 |
| 5629 | OSCAR J DRESSLER | Clearfield County, PA | Gas Property | Dec 2024 |
| 5630 | OSLEY | Fayette County, PA | Gas Property | Dec 2024 |
| 5631 | OSSESIA | Clarion County, PA | Gas Property | Dec 2024 |
| 5632 | OSSESSIA | Clarion County, PA | Gas Property | Dec 2024 |
| 5633 | OSTRANDER | Tioga County, PA | Gas Property | Jun 2025 |
| 5634 | OSTRICH | Greene County, PA | Gas Property | Jun 2025 |
| 5635 | OSWAYO CHEMICAL | Potter County, PA | Gas Property | Dec 2024 |
| 5636 | OTIS | Bradford County, PA | Gas Property | May 2025 |
| 5637 | OTIS IRONS | McKean County, PA | Gas Property | Dec 2024 |
| 5638 | OTIS PROCIOUS ETAL | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 5639 | OTT 1 | Warren County, PA | Gas Property | Dec 2024 |
| 5640 | OTT 2 | Warren County, PA | Gas Property | Dec 2024 |
| 5641 | OTTEN | Bradford County, PA | Gas Property | Jun 2025 |
| 5642 | OTTEN | Wyoming County, PA | Gas Property | Jun 2025 |
| 5643 | OTTER WELL SVC | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5644 | OTTO CHEM | Elk County, PA | Gas Property | Dec 2024 |
| 5645 | OUTSIDE IN SCH OF EXPERI | Westmoreland County, PA | Gas Property | Dec 2024 |
| 5646 | OVER | Clarion County, PA | Gas Property | Dec 2024 |
| 5647 | OVER | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 5648 | OW PROPER | Elk County, PA | Gas Property | Dec 2024 |
| 5649 | OWENS | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5650 | OZOG-THOMPSON 00 | Westmoreland County, PA | Gas Property | Dec 2024 |
| 5651 | P B SLEASE | Armstrong County, PA | Gas Property | Dec 2024 |
| 5652 | P CULLEN | Bradford County, PA | Gas Property | Jun 2025 |
| 5653 | P F EIS | Westmoreland County, PA | Gas Property | Dec 2024 |
| 5654 | P F RIGGLE | Armstrong County, PA | Gas Property | Dec 2024 |
| 5655 | P H C 58H | Clearfield County, PA | Gas Property | Jun 2025 |
| 5656 | P H DEETER NORTH | Venango County, PA | Gas Property | Dec 2024 |
| 5657 | P KELLEY | Susquehanna County, PA | Gas Property | Jun 2025 |
| 5658 | P LONG | Indiana County, PA | Gas Property | Dec 2024 |
| 5659 | P M DEETER | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 5660 | P MOHNEY | Armstrong County, PA | Gas Property | Dec 2024 |
| 5661 | P NICHOLS | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5662 | P P V CORP | Clearfield County, PA | Gas Property | Dec 2024 |
| 5663 | P R LONG | Westmoreland County, PA | Gas Property | Dec 2024 |
| 5664 | P R U E WEISTER | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 5665 | P RINNE | Washington County, PA | Gas Property | Dec 2020 |
| 5666 | P WALDENBERGER | Susquehanna County, PA | Gas Property | Jun 2025 |
| 5667 | P WELLS | Susquehanna County, PA | Gas Property | Jun 2025 |
| 5668 | P WINSLOW | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 5669 | P&G 4 UNIT P&G4 2H | Wyoming County, PA | Gas Property | Jun 2025 |
| 5670 | P&G WAREHOUSE UNIT | Wyoming County, PA | Gas Property | Jun 2025 |
| 5671 | P&G4 P&G | Wyoming County, PA | Gas Property | Jun 2025 |
| 5672 | P.T. SHERRY | Indiana County, PA | Gas Property | Dec 2024 |
| 5673 | PA CHIP CHOP | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 5674 | PA DEPT | Clearfield County, PA | Gas Property | Dec 2023 |
| 5675 | PA DEPT OF F & W | Potter County, PA | Gas Property | Dec 1985 |
| 5676 | PA DEPT OF FOREST & WATERS | Clearfield County, PA | Gas Property | Dec 1985 |
| 5677 | PA EAST SIDE LAND | Armstrong County, PA | Gas Property | Dec 2024 |
| 5678 | PA FORESTS & WATERS DEPT | Elk County, PA | Gas Property | Dec 2022 |
| 5679 | PA FORESTS & WATERS DEPT TRACT | Elk County, PA | Gas Property | Dec 2021 |
| 5680 | PA FORESTS & WATERS DEPT TRACT 27 | Elk County, PA | Oil & Gas Property | Dec 2009 |
| 5681 | PA GAME | Jefferson County, PA | Gas Property | Dec 2013 |
| 5682 | PA GAME COMM | Jefferson County, PA | Gas Property | Dec 2024 |
| 5683 | PA GAME COMM | Mercer County, PA | Gas Property | Dec 2023 |
| 5684 | PA GAME COMM FMLY A | Jefferson County, PA | Gas Property | Dec 2024 |
| 5685 | PA GAME COMM SGL | McKean County, PA | Oil & Gas Property | Dec 2011 |
| 5686 | PA GAME COMMISSION UNIT | Washington County, PA | Gas Property | Jun 2025 |
| 5687 | PA GAS CO 1 | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 5688 | PA GAS WARRANT 3188 | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 5689 | PA GAS WARRANT 3188 | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 5690 | PA LAND HOLDINGS | Greene County, PA | Gas Property | Dec 2020 |
| 5691 | PA LAND HOLDINGS CO | Greene County, PA | Gas Property | Dec 2024 |
| 5692 | PA MINES | Cambria County, PA | Oil & Gas Property | Dec 2024 |
| 5693 | PA OIL CO TRACT | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 5694 | PA S FARM FAMILY UNIT A 1H | Bradford County, PA | Gas Property | Jun 2025 |
| 5695 | PA SGL 28 | Elk County, PA | Oil & Gas Property | Dec 2024 |
| 5696 | PA SGL 44 3 | Elk County, PA | Gas Property | Dec 2024 |
| 5697 | PA SGL 54 387 | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 5698 | PA STATE FOREST | Elk County, PA | Oil & Gas Property | Dec 2024 |
| 5699 | PA STATE FOREST | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 5700 | PA STATE FOREST | Jefferson County, PA | Oil & Gas Property | Dec 2024 |