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