| 901 | C & K COAL | Jefferson County, PA | Gas Property | Jun 2025 |
| 902 | C & K COAL 1 | Clarion County, PA | Gas Property | Dec 2024 |
| 903 | C & K COAL CO | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 904 | C & K COAL CO | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 905 | C & K UNIT | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 906 | C A OBERLIN HEIRS | Indiana County, PA | Gas Property | Dec 2024 |
| 907 | C ADAMS | Indiana County, PA | Gas Property | Dec 2024 |
| 908 | C B C CORP | Indiana County, PA | Gas Property | Dec 2024 |
| 909 | C BORK | Indiana County, PA | Gas Property | Dec 2024 |
| 910 | C BROWN LEASE | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 911 | C CARL SCHRECENGOST | Armstrong County, PA | Gas Property | Dec 2024 |
| 912 | C COLEMAN | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 913 | C E CANAN | McKean County, PA | Oil Property | Dec 2005 |
| 914 | C E STRICKLAND | Indiana County, PA | Gas Property | Dec 2024 |
| 915 | C F BLEAKNE | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 916 | C FOX | Clarion County, PA | Gas Property | Dec 2024 |
| 917 | C FRYSTAK | Susquehanna County, PA | Gas Property | Jun 2025 |
| 918 | C GUFFEY | Indiana County, PA | Gas Property | Dec 2024 |
| 919 | C H NEISWONGER | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 920 | C H SNYDER CO | Armstrong County, PA | Gas Property | Jun 2025 |
| 921 | C H SNYDER CO UNIT | Armstrong County, PA | Gas Property | Dec 2024 |
| 922 | C I OHARROW | Armstrong County, PA | Gas Property | Dec 2024 |
| 923 | C J BEHM | Greene County, PA | Gas Property | Dec 2024 |
| 924 | C J CLAWS | Indiana County, PA | Gas Property | Dec 2024 |
| 925 | C KALMAR | Armstrong County, PA | Gas Property | Dec 2024 |
| 926 | C L & DELORES WELLS | Indiana County, PA | Gas Property | Dec 2024 |
| 927 | C L RUFFNER | Indiana County, PA | Gas Property | Dec 2024 |
| 928 | C L WARREN | Indiana County, PA | Gas Property | Dec 2024 |
| 929 | C LARUE | Susquehanna County, PA | Gas Property | Jun 2025 |
| 930 | C MATSON | Westmoreland County, PA | Gas Property | Dec 2024 |
| 931 | C MAYS | Clearfield County, PA | Gas Property | Dec 2024 |
| 932 | C MILLER | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 933 | C MOGRIDGE | Susquehanna County, PA | Gas Property | Jun 2025 |
| 934 | C MOORE | Armstrong County, PA | Gas Property | Dec 2024 |
| 935 | C MORRISON UNIT | Mercer County, PA | Gas Property | Dec 2024 |
| 936 | C O P 1 | Clearfield County, PA | Gas Property | Jun 2025 |
| 937 | C O P 3 | Elk County, PA | Gas Property | Jun 2025 |
| 938 | C O P 41H-5303 | Clearfield County, PA | Gas Property | Jun 2025 |
| 939 | C O P 5 | Clearfield County, PA | Gas Property | Jun 2025 |
| 940 | C O P TR | Centre County, PA | Oil & Gas Property | Dec 2024 |
| 941 | C O P TRACT 293 PAD A 240 | Lycoming County, PA | Gas Property | Jun 2025 |
| 942 | C O P TRACT 729 PAD | Lycoming County, PA | Gas Property | Jun 2025 |
| 943 | C QUALK 00 | Washington County, PA | Gas Property | Dec 2024 |
| 944 | C RAYMOND GLASSER | Indiana County, PA | Gas Property | Dec 2024 |
| 945 | C RICHARD CAYLOR ET UX | Jefferson County, PA | Gas Property | Dec 2024 |
| 946 | C ROSENSTEEL | Indiana County, PA | Gas Property | Dec 2024 |
| 947 | C S & AUDREY M DAUGHERTY | Armstrong County, PA | Gas Property | Dec 2024 |
| 948 | C S DAY | Greene County, PA | Gas Property | Dec 2023 |
| 949 | C SCHWERIN | Indiana County, PA | Gas Property | Dec 2024 |
| 950 | C SHE | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 951 | C STEWART | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 952 | C STROHMAIER | Indiana County, PA | Gas Property | Dec 2024 |
| 953 | C T BELL | Indiana County, PA | Gas Property | Dec 2024 |
| 954 | C V WHITE | Warren County, PA | Gas Property | Dec 2024 |
| 955 | C W LYDIC | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 956 | C WEIGAND | Armstrong County, PA | Gas Property | Dec 2024 |
| 957 | C&I RESOURCES | Cambria County, PA | Gas Property | Dec 2019 |
| 958 | C&K 58 | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 959 | C&K COAL | Centre County, PA | Oil & Gas Property | Dec 2024 |
| 960 | C&K COAL | Centre County, PA | Gas Property | Dec 2024 |
| 961 | C&K COAL | Centre County, PA | Oil & Gas Property | Dec 2024 |
| 962 | C&K/MCCULLOUGH | Clarion County, PA | Gas Property | Jun 2025 |
| 963 | C&Z UNIT | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 964 | C. PEPPER UNIT | Bradford County, PA | Gas Property | Jun 2025 |
| 965 | C.A. WEST ESTATE | Westmoreland County, PA | Gas Property | Dec 2024 |
| 966 | C.E. SMITH | Washington County, PA | Oil Property | Dec 2024 |
| 967 | C.G.CRAVENER | Armstrong County, PA | Gas Property | Dec 2024 |
| 968 | C.M.SMITH | Indiana County, PA | Gas Property | Dec 2024 |
| 969 | C.O.P. TRACT 25 | Centre County, PA | Oil & Gas Property | Dec 2024 |
| 970 | C.W. MCCONAUGHEY JR & HEIRS | Indiana County, PA | Gas Property | Dec 2024 |
| 971 | CABLE & SNYDER LOGGING CO | Clearfield County, PA | Gas Property | Dec 2024 |
| 972 | CADER 00 | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 973 | CADWALADER UNIT | Lycoming County, PA | Gas Property | Jun 2025 |
| 974 | CAHILL REALTY BUSINESS UNIT | Bradford County, PA | Gas Property | Jun 2025 |
| 975 | CALDWELL C | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 976 | CALDWELL F | Washington County, PA | Oil & Gas Property | Dec 2024 |
| 977 | CALIARI BEL | Clearfield County, PA | Gas Property | Dec 2024 |
| 978 | CALLEN | Armstrong County, PA | Gas Property | Jun 2025 |
| 979 | CALLIOPE | Westmoreland County, PA | Gas Property | Jun 2025 |
| 980 | CALMITCH BRA | Bradford County, PA | Gas Property | Jun 2025 |
| 981 | CALVIN I NIEMEYER | Erie County, PA | Gas Property | Dec 2019 |
| 982 | CALVIN RO | Jefferson County, PA | Oil & Gas Property | Dec 2024 |
| 983 | CALVIN SHAFFER | Jefferson County, PA | Gas Property | Dec 2024 |
| 984 | CALVIN SMITH HEIRS | Westmoreland County, PA | Gas Property | Dec 2024 |
| 985 | CAMERON | Indiana County, PA | Gas Property | Dec 2024 |
| 986 | CAMERON JOHNSTON | Clearfield County, PA | Gas Property | Dec 2024 |
| 987 | CAMP COMFORT 07 185 | Susquehanna County, PA | Gas Property | Jun 2025 |
| 988 | CAMPBELL | Indiana County, PA | Gas Property | Dec 2024 |
| 989 | CAMPBELL | Clarion County, PA | Gas Property | Dec 2020 |
| 990 | CAMPBELL | Indiana County, PA | Gas Property | Dec 2024 |
| 991 | CAMPBELL | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 992 | CAMPBELL | Jefferson County, PA | Gas Property | Dec 2024 |
| 993 | CAMPBELL | Fayette County, PA | Oil & Gas Property | Jun 2025 |
| 994 | CAMPBELL ERCOLE | Bradford County, PA | Gas Property | Jun 2025 |
| 995 | CAMPBELL FARMS | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 996 | CAMPBELL JACOB UNIT | Washington County, PA | Gas Property | Jun 2025 |
| 997 | CAMPBELL UNIT | Washington County, PA | Gas Property | Jun 2025 |
| 998 | CAMPISE | Washington County, PA | Oil & Gas Property | Dec 2024 |
| 999 | CANESTRALE | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 1000 | CANESTRALE | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |