| 601 | COURTNEY | Mercer County, PA | Gas Property | Dec 2024 |
| 602 | COURTNEY | Tioga County, PA | Gas Property | Feb 2025 |
| 603 | COVEYTOWN | Sullivan County, PA | Gas Property | Jan 2025 |
| 604 | COVINGTON | Bradford County, PA | Gas Property | Feb 2025 |
| 605 | COVINGTON PROSPECT PAD R (WATKINS) 1 | Tioga County, PA | Gas Property | Feb 2025 |
| 606 | COWDEN | Washington County, PA | Oil & Gas Property | Feb 2025 |
| 607 | COWDEN | Washington County, PA | Oil & Gas Property | Feb 2025 |
| 608 | COWDEN | Washington County, PA | Oil & Gas Property | Feb 2025 |
| 609 | COWDEN WILLIAM UNIT | Washington County, PA | Gas Property | Feb 2025 |
| 610 | COX COX 1 | McKean County, PA | Gas Property | Dec 2024 |
| 611 | COYLE BRA | Bradford County, PA | Gas Property | Feb 2025 |
| 612 | COYLE SOUTH | Susquehanna County, PA | Gas Property | Feb 2025 |
| 613 | COYNE-SLAGLE UNIT | Venango County, PA | Gas Property | Dec 2024 |
| 614 | COYOTE RUN | Bradford County, PA | Gas Property | Feb 2025 |
| 615 | COZY | Crawford County, PA | Gas Property | Dec 2024 |
| 616 | CP 1H | Washington County, PA | Gas Property | Feb 2025 |
| 617 | CP 3H | Washington County, PA | Gas Property | Feb 2025 |
| 618 | CP 4H | Washington County, PA | Gas Property | Feb 2025 |
| 619 | CP 5H | Washington County, PA | Gas Property | Feb 2025 |
| 620 | CP FOGLE F | Forest County, PA | Oil Property | Dec 2024 |
| 621 | CP UNIT | Venango County, PA | Gas Property | Dec 2024 |
| 622 | CP UNIT | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 623 | CRAFT C | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 624 | CRAIG | Erie County, PA | Oil & Gas Property | Dec 2024 |
| 625 | CRAIG LASH UNIT | Westmoreland County, PA | Gas Property | Feb 2025 |
| 626 | CRAIG NT | Indiana County, PA | Gas Property | Dec 2024 |
| 627 | CRAIGE | Susquehanna County, PA | Gas Property | Feb 2025 |
| 628 | CRAIN | Bradford County, PA | Gas Property | Feb 2025 |
| 629 | CRAMER | Susquehanna County, PA | Gas Property | Feb 2025 |
| 630 | CRANE | Bradford County, PA | Gas Property | Feb 2025 |
| 631 | CRANE J 0 | Susquehanna County, PA | Gas Property | Feb 2025 |
| 632 | CRANK 03 067 | Bradford County, PA | Gas Property | Feb 2025 |
| 633 | CRANRUN | Bradford County, PA | Gas Property | Feb 2025 |
| 634 | CRATTY | Butler County, PA | Gas Property | Feb 2025 |
| 635 | CRATTY B UNIT 1H | Butler County, PA | Gas Property | Feb 2025 |
| 636 | CRAVAT COAL B UNIT | Washington County, PA | Gas Property | Feb 2025 |
| 637 | CRAWFORD | Elk County, PA | Oil & Gas Property | Dec 2018 |
| 638 | CRAWFORD | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 639 | CRAWFORD | Bradford County, PA | Gas Property | Apr 2024 |
| 640 | CRAWFORD | Mercer County, PA | Gas Property | Dec 2024 |
| 641 | CRAWFORD | Armstrong County, PA | Gas Property | Dec 2024 |
| 642 | CREE | Greene County, PA | Oil & Gas Property | Feb 2025 |
| 643 | CREIGHTON | Washington County, PA | Gas Property | Dec 2024 |
| 644 | CREW-LEVICK (MCCOOL) | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 645 | CREWE | Armstrong County, PA | Gas Property | Dec 2024 |
| 646 | CRICK | Clarion County, PA | Oil & Gas Property | Dec 2020 |
| 647 | CRIMALDI | Cambria County, PA | Gas Property | Dec 2024 |
| 648 | CRISPEN H | Mercer County, PA | Gas Property | Dec 2024 |
| 649 | CRITZER | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 650 | CROASMUN | Cambria County, PA | Gas Property | Dec 2024 |
| 651 | CROCKER | Warren County, PA | Gas Property | Dec 2024 |
| 652 | CROFTCHECK | Fayette County, PA | Gas Property | Dec 2024 |
| 653 | CROFTCHECK 1 | Fayette County, PA | Gas Property | Dec 2024 |
| 654 | CROSBY | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 655 | CROSBY 00 | Westmoreland County, PA | Gas Property | Dec 2024 |
| 656 | CROSLEY | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 657 | CROSS CREEK C | Washington County, PA | Oil & Gas Property | Feb 2025 |
| 658 | CROSSETT | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 659 | CROSSGATES INC (FMLY J C RINN) | Indiana County, PA | Gas Property | Dec 2024 |
| 660 | CROTALLO | Armstrong County, PA | Gas Property | Dec 2024 |
| 661 | CROTHERS | Washington County, PA | Oil Property | Dec 2000 |
| 662 | CROUSE MOR14 | Greene County, PA | Gas Property | Feb 2025 |
| 663 | CROUSHORE | Fayette County, PA | Oil & Gas Property | Feb 2025 |
| 664 | CROWL C | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 665 | CROWLEY | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 666 | CROWNOVER | Armstrong County, PA | Gas Property | Dec 2024 |
| 667 | CROYLE 00 | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 668 | CRUM NV55 | Washington County, PA | Gas Property | Feb 2025 |
| 669 | CRUTTENDEN | Tioga County, PA | Gas Property | Feb 2025 |
| 670 | CRYSTAL | Bradford County, PA | Gas Property | Feb 2025 |
| 671 | CRYTZER | Armstrong County, PA | Gas Property | Feb 2025 |
| 672 | CSI 2H | Bradford County, PA | Gas Property | Feb 2025 |
| 673 | CSI 5H | Bradford County, PA | Gas Property | Feb 2025 |
| 674 | CTG BEA | Beaver County, PA | Gas Property | Feb 2025 |
| 675 | CUBBON | Venango County, PA | Oil Property | Dec 1997 |
| 676 | CUBBON | Venango County, PA | Gas Property | Dec 2024 |
| 677 | CUBBON | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 678 | CUBBON LUMBER CO | Warren County, PA | Gas Property | Dec 2024 |
| 679 | CULBERTSON | Clarion County, PA | Oil & Gas Property | Dec 2020 |
| 680 | CULBERTSON | Armstrong County, PA | Gas Property | Dec 2024 |
| 681 | CUMBERLAND | Greene County, PA | Gas Property | Dec 2024 |
| 682 | CUMMINGS 823 | Tioga County, PA | Gas Property | Feb 2025 |
| 683 | CUMMINGS LUMBER 01 081 | Bradford County, PA | Gas Property | Feb 2025 |
| 684 | CUNDARI | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 685 | CUNNINGHAM | Venango County, PA | Oil Property | Dec 2014 |
| 686 | CUPPER | Tioga County, PA | Gas Property | Feb 2025 |
| 687 | CURRY | Washington County, PA | Oil & Gas Property | Dec 2024 |
| 688 | CURTIN | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 689 | CURTIN | Wyoming County, PA | Gas Property | Feb 2025 |
| 690 | CURTIN UNIT | Bradford County, PA | Gas Property | Feb 2025 |
| 691 | CURTIS | Erie County, PA | Gas Property | Dec 2024 |
| 692 | CURTIS | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 693 | CURTIS | Bradford County, PA | Gas Property | Feb 2025 |
| 694 | CURTIS F POOLE | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 695 | CURTIS LOT | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 696 | CUSICK H | Mercer County, PA | Gas Property | Dec 2024 |
| 697 | CUTHBERTSON BRA | Bradford County, PA | Gas Property | Feb 2025 |
| 698 | CW MORRIS | Crawford County, PA | Gas Property | Dec 2024 |
| 699 | CYNTHIA BOND | Indiana County, PA | Gas Property | Dec 2024 |
| 700 | CYNTHIA M KNISPEL A | Lycoming County, PA | Gas Property | Feb 2025 |