| 1401 | CONRHEIN N | Greene County, PA | Gas Property | Feb 2025 |
| 1402 | CONRHEIN NV | Washington County, PA | Gas Property | Feb 2025 |
| 1403 | CONSOL | Greene County, PA | Gas Property | Feb 2025 |
| 1404 | CONSOL | Greene County, PA | Gas Property | Dec 2024 |
| 1405 | CONSOL | Greene County, PA | Gas Property | Feb 2025 |
| 1406 | CONSOL GH | Greene County, PA | Gas Property | Feb 2025 |
| 1407 | CONSOL MOR | Greene County, PA | Gas Property | Feb 2025 |
| 1408 | CONSOL MOR44 | Washington County, PA | Gas Property | Feb 2025 |
| 1409 | CONSOL NV | Washington County, PA | Oil & Gas Property | Feb 2025 |
| 1410 | CONSOL NV57 | Washington County, PA | Gas Property | Feb 2025 |
| 1411 | CONSOL PA | Greene County, PA | Gas Property | Dec 2024 |
| 1412 | CONSOL PA COAL CO | Greene County, PA | Gas Property | Dec 2023 |
| 1413 | CONSOL PENNSYLVANIA CO | Greene County, PA | Gas Property | Feb 2025 |
| 1414 | CONSOL RHL11 | Greene County, PA | Gas Property | Feb 2025 |
| 1415 | CONSOL WFN6 | Washington County, PA | Oil & Gas Property | Feb 2025 |
| 1416 | CONSOL/USX | Greene County, PA | Oil & Gas Property | Dec 2024 |
| 1417 | CONSOL/USX | Greene County, PA | Oil & Gas Property | Feb 2025 |
| 1418 | CONSOLIDATED RAIL CORP | Clearfield County, PA | Gas Property | Dec 2018 |
| 1419 | CONSOLIDATED RAIL CORPORATION | Allegheny County, PA | Gas Property | Dec 2024 |
| 1420 | CONSOLIDATION COAL CO | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 1421 | CONSOLIDATION COAL CO | Allegheny County, PA | Gas Property | Dec 2024 |
| 1422 | CONSOLIDATION COAL CO | Monongalia County, WV | Gas Property | Dec 2019 |
| 1423 | CONSTANTINE | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 1424 | COOK | Venango County, PA | Oil Property | Dec 1998 |
| 1425 | COOK 05 040 0 | Bradford County, PA | Gas Property | Feb 2025 |
| 1426 | COOK FOREST STATE PARK | Clarion County, PA | Gas Property | Dec 2024 |
| 1427 | COOK N SUS | Susquehanna County, PA | Gas Property | Feb 2025 |
| 1428 | COOK UNIT | Jefferson County, PA | Gas Property | Feb 2025 |
| 1429 | COOK UNIT COOK 2H | Wyoming County, PA | Gas Property | Feb 2025 |
| 1430 | COOK-SMITH | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 1431 | COOLEY | Bradford County, PA | Gas Property | Feb 2025 |
| 1432 | COOLEY (05-266-0 | Bradford County, PA | Gas Property | Feb 2025 |
| 1433 | COOLEY 05 004 01 P 1H OG WELL | Bradford County, PA | Gas Property | Feb 2025 |
| 1434 | COON HOLLOW 904 | Potter County, PA | Gas Property | Feb 2025 |
| 1435 | COOPER | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 1436 | COOPER | Venango County, PA | Oil & Gas Property | Dec 1997 |
| 1437 | COOPER 400 1H | Tioga County, PA | Gas Property | Feb 2025 |
| 1438 | COOPER 590 | Greene County, PA | Oil & Gas Property | May 2020 |
| 1439 | COOPER CHARLES | Washington County, PA | Oil & Gas Property | Dec 2011 |
| 1440 | COP 2 | Elk County, PA | Gas Property | Feb 2025 |
| 1441 | COP 324 | Clearfield County, PA | Gas Property | Feb 2025 |
| 1442 | COP 3H 4093 | Elk County, PA | Gas Property | Feb 2025 |
| 1443 | COP 5H 2316 | Elk County, PA | Gas Property | Feb 2025 |
| 1444 | COP 6 | Elk County, PA | Gas Property | Dec 2024 |
| 1445 | COP 6 | Clearfield County, PA | Gas Property | Feb 2025 |
| 1446 | COP 7 | Clearfield County, PA | Gas Property | Feb 2025 |
| 1447 | COP 8 | Clearfield County, PA | Gas Property | Feb 2025 |
| 1448 | COP TR | Centre County, PA | Gas Property | Dec 2016 |
| 1449 | COP TR | Centre County, PA | Gas Property | Feb 2025 |
| 1450 | COP TR | Centre County, PA | Gas Property | Dec 2024 |
| 1451 | COP TR 32 | Clearfield County, PA | Gas Property | Feb 2025 |
| 1452 | COP TRACT | Clinton County, PA | Oil & Gas Property | Feb 2025 |
| 1453 | COP TRACT | Clinton County, PA | Gas Property | Feb 2025 |
| 1454 | COP TRACT | Clinton County, PA | Gas Property | Feb 2025 |
| 1455 | COP TRACT | Lycoming County, PA | Gas Property | Feb 2025 |
| 1456 | COP TRACT 322 PAD | Lycoming County, PA | Gas Property | Feb 2025 |
| 1457 | COP TRACT 551 | Lycoming County, PA | Gas Property | Feb 2025 |
| 1458 | COP TRACT 596 PAD | Tioga County, PA | Gas Property | Feb 2025 |
| 1459 | COP TRACT 706 | Centre County, PA | Gas Property | Feb 2025 |
| 1460 | COP TRACT 726 | Lycoming County, PA | Gas Property | Feb 2025 |
| 1461 | COP TRACT 727 PAD 3 | Clinton County, PA | Gas Property | Feb 2025 |
| 1462 | COP WT 2 | Elk County, PA | Gas Property | Feb 2025 |
| 1463 | COP WT 2314 | McKean County, PA | Gas Property | Feb 2025 |
| 1464 | COPELAND | Forest County, PA | Oil Property | Dec 2024 |
| 1465 | CORA A BROWN | Armstrong County, PA | Gas Property | Dec 2024 |
| 1466 | CORA BELLE TURNER | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 1467 | CORBETT | Westmoreland County, PA | Gas Property | Feb 2025 |
| 1468 | CORBETT | Clarion County, PA | Oil & Gas Property | Dec 2020 |
| 1469 | CORBETT | Bradford County, PA | Gas Property | Feb 2025 |
| 1470 | CORBETT & WILSON 58 | Clarion County, PA | Gas Property | Dec 2024 |
| 1471 | CORBIN | Indiana County, PA | Oil & Gas Property | Dec 2022 |
| 1472 | CORBIN J | Susquehanna County, PA | Gas Property | Feb 2025 |
| 1473 | COREY 07 089 0 | Susquehanna County, PA | Gas Property | Feb 2025 |
| 1474 | CORL N SUL 2H | Sullivan County, PA | Gas Property | Feb 2025 |
| 1475 | CORNHILL C UNIT | Lycoming County, PA | Gas Property | Feb 2025 |
| 1476 | CORNPLANTER | Forest County, PA | Oil Property | Dec 2024 |
| 1477 | CORNWALL | Lycoming County, PA | Gas Property | Feb 2025 |
| 1478 | CORNWALL B | Lycoming County, PA | Gas Property | Feb 2025 |
| 1479 | CORNWALL C | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 1480 | CORNWALL EAST UNIT | Lycoming County, PA | Gas Property | Feb 2025 |
| 1481 | CORNWALL NORTH UNIT | Lycoming County, PA | Gas Property | Feb 2025 |
| 1482 | CORNWALL TURKEY UNIT | Lycoming County, PA | Gas Property | Feb 2025 |
| 1483 | CORRIDONI | Indiana County, PA | Gas Property | Dec 2024 |
| 1484 | CORRY | Greene County, PA | Gas Property | Feb 2025 |
| 1485 | CORRY COUNTRY CLUB | Erie County, PA | Gas Property | Dec 1996 |
| 1486 | CORSAIR | Greene County, PA | Gas Property | Feb 2025 |
| 1487 | CORSE | Venango County, PA | Oil Property | Dec 2024 |
| 1488 | CORSON UNIT | Lycoming County, PA | Gas Property | Feb 2025 |
| 1489 | CORY | McKean County, PA | Oil Property | Dec 2024 |
| 1490 | COSGRAY | Greene County, PA | Gas Property | Feb 2025 |
| 1491 | COSNER | Susquehanna County, PA | Gas Property | Feb 2025 |
| 1492 | COSS | Mercer County, PA | Gas Property | Dec 2024 |
| 1493 | COSTANZO UNIT | Washington County, PA | Oil & Gas Property | Feb 2025 |
| 1494 | COSTELLO 16 | Potter County, PA | Gas Property | Dec 2000 |
| 1495 | COTTON HANLON | Lycoming County, PA | Gas Property | Feb 2025 |
| 1496 | COTTON HANLON 595 | Tioga County, PA | Gas Property | Feb 2025 |
| 1497 | COULTER | Crawford County, PA | Oil & Gas Property | Dec 2024 |
| 1498 | COULTER | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 1499 | COUNTY OF ARMSTRONG | Armstrong County, PA | Gas Property | Dec 2024 |
| 1500 | COURTNEY | Mercer County, PA | Gas Property | Dec 2024 |