| 1 | O & R KOHL | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 2 | O CRAMER | Indiana County, PA | Gas Property | Dec 2024 |
| 3 | O F HILL | Indiana County, PA | Gas Property | Dec 2025 |
| 4 | O GIBSON | Armstrong County, PA | Gas Property | Dec 2025 |
| 5 | O J KING | Armstrong County, PA | Gas Property | Dec 2025 |
| 6 | O M RE | Clearfield County, PA | Gas Property | Dec 2025 |
| 7 | O REILLY 1 | Susquehanna County, PA | Gas Property | Dec 2025 |
| 8 | O W RIGGLE | Armstrong County, PA | Gas Property | Dec 2025 |
| 9 | OAK RIDGE N | Susquehanna County, PA | Gas Property | Dec 2025 |
| 10 | OAK TREE FAIRWAY UNIT | Mercer County, PA | Oil & Gas Property | Dec 2025 |
| 11 | OAKES | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 12 | OAKES | McKean County, PA | Oil Property | Dec 2007 |
| 13 | OAKLAND | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 14 | OAKLAND CEMET | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 15 | OAKMONT COUNT | Allegheny County, PA | Gas Property | Dec 2025 |
| 16 | OAKMONT EAST | Allegheny County, PA | Gas Property | Dec 2025 |
| 17 | OBER UNIT | Bradford County, PA | Gas Property | Dec 2025 |
| 18 | OBER UNIT | Westmoreland County, PA | Gas Property | Dec 2023 |
| 19 | OBLINSKY | Indiana County, PA | Gas Property | Dec 2025 |
| 20 | OBRIEN | Susquehanna County, PA | Gas Property | Dec 2025 |
| 21 | OCHS | Clarion County, PA | Gas Property | Dec 2025 |
| 22 | OCHS | Clearfield County, PA | Gas Property | Dec 2025 |
| 23 | OCHS INVESTMENT LTD PARTNERSHIP | Clarion County, PA | Gas Property | Dec 2025 |
| 24 | OCHS/SBI | Armstrong County, PA | Gas Property | Dec 2025 |
| 25 | OCTA NUPP | Indiana County, PA | Gas Property | Dec 2025 |
| 26 | ODONNELL | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 27 | ODONNELL | Warren County, PA | Oil & Gas Property | Dec 2025 |
| 28 | ODONNELL JOSEPH UNIT | Washington County, PA | Gas Property | Nov 2025 |
| 29 | ODOWD | Susquehanna County, PA | Gas Property | Dec 2025 |
| 30 | OESTERLING | Armstrong County, PA | Gas Property | Dec 2025 |
| 31 | OFFUTT | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 32 | OGONTZ FISHING CLUB | Lycoming County, PA | Gas Property | Nov 2025 |
| 33 | OHIO VALLEY LBC UNIT | Washington County, PA | Oil & Gas Property | Nov 2025 |
| 34 | OIL CREEK S | Venango County, PA | Gas Property | Dec 2024 |
| 35 | OILCAN | Bradford County, PA | Gas Property | Dec 2025 |
| 36 | OLCZAK | Greene County, PA | Gas Property | Dec 2025 |
| 37 | OLD HOME MANOR | Indiana County, PA | Oil & Gas Property | Dec 2025 |
| 38 | OLD MCDONALD FARM UNIT | Washington County, PA | Gas Property | Nov 2025 |
| 39 | OLD TOWN BEAGLE CLUB | Clearfield County, PA | Gas Property | Dec 2025 |
| 40 | OLER THOMPSON B | Clearfield County, PA | Gas Property | Dec 2025 |
| 41 | OLEXA | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 42 | OLGA H WEBER | Jefferson County, PA | Gas Property | Dec 2025 |
| 43 | OLIVER | Fayette County, PA | Gas Property | Dec 2024 |
| 44 | OLIVER | Allegheny County, PA | Gas Property | Dec 2025 |
| 45 | OLIVER | Mercer County, PA | Oil & Gas Property | Dec 2025 |
| 46 | OLIVER EAST MON23H1 | Allegheny County, PA | Gas Property | Dec 2025 |
| 47 | OLIVER FARM WARRANT 4004 | McKean County, PA | Oil & Gas Property | Dec 2009 |
| 48 | OLIVER UNIT | Susquehanna County, PA | Gas Property | Dec 2025 |
| 49 | OLIVER W PROPER | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 50 | OLLIE MORRIS | Jefferson County, PA | Gas Property | Dec 2025 |
| 51 | OLSON | Warren County, PA | Gas Property | Dec 2025 |
| 52 | OLSON 02 101 0 | Tioga County, PA | Gas Property | Dec 2025 |
| 53 | OLSON ROBERT & MARGARET 3864 | Jefferson County, PA | Gas Property | Dec 2025 |
| 54 | OLSON UNIT | Venango County, PA | Gas Property | Dec 2024 |
| 55 | OLYMPIC LAKE ESTATES 07 083 0 | Susquehanna County, PA | Gas Property | Dec 2025 |
| 56 | OMASTA | Westmoreland County, PA | Gas Property | Dec 2000 |
| 57 | OMR (02-188 | Tioga County, PA | Gas Property | Dec 2025 |
| 58 | ONEIL | Warren County, PA | Oil Property | Dec 2025 |
| 59 | ONEILL | Warren County, PA | Oil Property | Dec 2025 |
| 60 | ONIFRO O | McKean County, PA | Oil & Gas Property | Dec 2005 |
| 61 | OPACIC | Westmoreland County, PA | Oil & Gas Property | Dec 2025 |
| 62 | ORENCHUK RUSSELL 11890 | Washington County, PA | Gas Property | Nov 2025 |
| 63 | ORIN LEE NEAL | Jefferson County, PA | Gas Property | Dec 2025 |
| 64 | ORIS | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 65 | ORIS M. SCHRECENGOST | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 66 | ORLANDO HARMAN | Armstrong County, PA | Gas Property | Dec 2025 |
| 67 | ORLOSKY | Mercer County, PA | Gas Property | Dec 2025 |
| 68 | ORMSBY DEVONIAN | McKean County, PA | Gas Property | Dec 1993 |
| 69 | OROURKE 05 046 0 | Bradford County, PA | Gas Property | Dec 2025 |
| 70 | ORR 1 | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 71 | ORR 2 | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 72 | ORR 3 | Fayette County, PA | Oil & Gas Property | Dec 2025 |
| 73 | ORTH B | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 74 | ORTHODOX | Crawford County, PA | Oil & Gas Property | Dec 2025 |
| 75 | ORTON | Washington County, PA | Oil & Gas Property | Oct 2025 |
| 76 | ORTON | Erie County, PA | Gas Property | Dec 1986 |
| 77 | ORVILLE | Indiana County, PA | Gas Property | Dec 2025 |
| 78 | ORVILLE M WATSON | Indiana County, PA | Gas Property | Dec 2025 |
| 79 | ORVILLE W. PRESCOTT | Clearfield County, PA | Gas Property | Dec 2025 |
| 80 | ORWICK | Clearfield County, PA | Gas Property | Dec 2025 |
| 81 | OS BURNHAM | Crawford County, PA | Gas Property | Dec 2017 |
| 82 | OSCAR B GRANT | Elk County, PA | Oil & Gas Property | Dec 2025 |
| 83 | OSCAR C BENSON | Jefferson County, PA | Gas Property | Dec 2025 |
| 84 | OSCAR EARL HOUSER | Armstrong County, PA | Gas Property | Dec 2025 |
| 85 | OSCAR J DRESSLER | Clearfield County, PA | Gas Property | Dec 2025 |
| 86 | OSLEY | Fayette County, PA | Gas Property | Dec 2025 |
| 87 | OSSESIA | Clarion County, PA | Gas Property | Dec 2025 |
| 88 | OSSESSIA | Clarion County, PA | Gas Property | Dec 2025 |
| 89 | OSTRANDER | Tioga County, PA | Gas Property | Dec 2025 |
| 90 | OSTRICH | Greene County, PA | Gas Property | Dec 2025 |
| 91 | OTIS | Bradford County, PA | Gas Property | Dec 2025 |
| 92 | OTIS IRONS | McKean County, PA | Gas Property | Dec 2025 |
| 93 | OTIS PROCIOUS ETAL | Armstrong County, PA | Oil & Gas Property | Dec 2025 |
| 94 | OTT 1 | Warren County, PA | Gas Property | Dec 2024 |
| 95 | OTT 2 | Warren County, PA | Gas Property | Dec 2024 |
| 96 | OTTEN | Bradford County, PA | Gas Property | Dec 2025 |
| 97 | OTTEN | Wyoming County, PA | Gas Property | Dec 2025 |
| 98 | OTTER WELL SVC | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 99 | OTTO CHEM | Elk County, PA | Gas Property | Dec 2025 |
| 100 | OVER | Clarion County, PA | Gas Property | Dec 2025 |