| 1001 | CANIS MAJOR | Butler County, PA | Gas Property | Jun 2025 |
| 1002 | CANNELLA | Susquehanna County, PA | Gas Property | Jun 2025 |
| 1003 | CANNIZZARO | Fayette County, PA | Oil & Gas Property | Dec 2024 |
| 1004 | CANNON | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 1005 | CANO | Westmoreland County, PA | Oil & Gas Property | Dec 2024 |
| 1006 | CANTERBURY | Armstrong County, PA | Gas Property | Dec 2024 |
| 1007 | CANTONI 00 | Allegheny County, PA | Oil & Gas Property | Dec 2024 |
| 1008 | CAPIZZI | Indiana County, PA | Gas Property | Dec 2024 |
| 1009 | CAPPUCCI | Wyoming County, PA | Gas Property | Jun 2025 |
| 1010 | CAPRIO 07 077 | Susquehanna County, PA | Gas Property | Jun 2025 |
| 1011 | CAPTAIN | Fayette County, PA | Gas Property | Dec 2024 |
| 1012 | CAPTAIN JACK SPARROW | Washington County, PA | Gas Property | Jun 2025 |
| 1013 | CAPTAIN USA | Washington County, PA | Gas Property | Jun 2025 |
| 1014 | CARBONARA | Fayette County, PA | Gas Property | Dec 2024 |
| 1015 | CARDINE | Fayette County, PA | Gas Property | Jun 2025 |
| 1016 | CARDON M-621 | Clearfield County, PA | Gas Property | Dec 2024 |
| 1017 | CAREY R 00 | Susquehanna County, PA | Gas Property | Jun 2025 |
| 1018 | CARJA INC | Armstrong County, PA | Gas Property | Dec 2024 |
| 1019 | CARKIN R | Mercer County, PA | Gas Property | Dec 2024 |
| 1020 | CARL A SPEVETZ ET UX | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 1021 | CARL BAILEY | Indiana County, PA | Oil & Gas Property | Dec 2024 |
| 1022 | CARL BE | Erie County, PA | Gas Property | Dec 2024 |
| 1023 | CARL DECKER | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 1024 | CARL E HARKLEROAD | Clearfield County, PA | Gas Property | Dec 2024 |
| 1025 | CARL E MCCALL | Clarion County, PA | Oil & Gas Property | Dec 2024 |
| 1026 | CARL ECKLUND | Clearfield County, PA | Gas Property | Dec 2024 |
| 1027 | CARL FREDERICK | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 1028 | CARL H & ELEANOR FITZSIMMONS | Westmoreland County, PA | Gas Property | Dec 2024 |
| 1029 | CARL L C | Armstrong County, PA | Gas Property | Dec 2024 |
| 1030 | CARL M HAGGERTY | Indiana County, PA | Gas Property | Dec 2024 |
| 1031 | CARL PATCHIN | Cambria County, PA | Gas Property | Dec 2024 |
| 1032 | CARL R EARHART | Westmoreland County, PA | Gas Property | Dec 2024 |
| 1033 | CARL R PROPER | Venango County, PA | Oil & Gas Property | Dec 2024 |
| 1034 | CARL W ELLINGER ETUX | Clearfield County, PA | Gas Property | Dec 2024 |
| 1035 | CARL W SNYDER | Armstrong County, PA | Gas Property | Dec 2024 |
| 1036 | CARL WALKER WAYNE D BRAUGHLER ET UX | Indiana County, PA | Gas Property | Dec 2024 |
| 1037 | CARLIN | Venango County, PA | Oil Property | Dec 1999 |
| 1038 | CARLIN | Centre County, PA | Gas Property | Dec 2024 |
| 1039 | CARLISLE RUTH UNIT | Washington County, PA | Gas Property | Jun 2025 |
| 1040 | CARLSON | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 1041 | CARLSON | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 1042 | CARLSON | Warren County, PA | Oil & Gas Property | Dec 2011 |
| 1043 | CARMALT BURNS | Jefferson County, PA | Gas Property | Dec 2024 |
| 1044 | CARNEGIE NATURAL GAS CO | Fayette County, PA | Gas Property | Dec 2024 |
| 1045 | CARNS DONALD | Washington County, PA | Gas Property | Jun 2025 |
| 1046 | CARNS DONALD UNIT | Washington County, PA | Gas Property | Jun 2025 |
| 1047 | CARNS UNIT | Washington County, PA | Oil & Gas Property | Dec 2013 |
| 1048 | CAROFF | Indiana County, PA | Gas Property | Dec 2024 |
| 1049 | CAROLYN & GEORGE MORRIS | Greene County, PA | Gas Property | Dec 2020 |
| 1050 | CAROLYN KLINGENSMITH | Westmoreland County, PA | Gas Property | Dec 2024 |
| 1051 | CAROLYN PARK | Indiana County, PA | Gas Property | Dec 2024 |
| 1052 | CARPENETTI R | Susquehanna County, PA | Gas Property | Jun 2025 |
| 1053 | CARPENTER | Fayette County, PA | Gas Property | Dec 2024 |
| 1054 | CARPENTER | Greene County, PA | Gas Property | Jun 2025 |
| 1055 | CARPENTER | Crawford County, PA | Gas Property | Dec 2024 |
| 1056 | CARPENTER 03 023 0 | Bradford County, PA | Gas Property | Jun 2025 |
| 1057 | CARPENTERTOWN COAL & CO | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 1058 | CARR | Bradford County, PA | Gas Property | Jun 2025 |
| 1059 | CARR | Westmoreland County, PA | Gas Property | Dec 2024 |
| 1060 | CARR S BRA 2H | Bradford County, PA | Gas Property | Jun 2025 |
| 1061 | CARRAR | Susquehanna County, PA | Gas Property | Jun 2025 |
| 1062 | CARRINGTON | Warren County, PA | Oil & Gas Property | Dec 2014 |
| 1063 | CARROLL | Clarion County, PA | Oil Property | Dec 1992 |
| 1064 | CARROLL | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 1065 | CARROLLS NURSERY | Crawford County, PA | Gas Property | Dec 2024 |
| 1066 | CARSON | Fayette County, PA | Gas Property | Dec 2024 |
| 1067 | CARSON | Susquehanna County, PA | Gas Property | Jun 2025 |
| 1068 | CARSON | Washington County, PA | Oil Property | Dec 2001 |
| 1069 | CARSON UNIT | Butler County, PA | Oil & Gas Property | Jun 2025 |
| 1070 | CARTER | Greene County, PA | Oil & Gas Property | Jun 2025 |
| 1071 | CARTER | Washington County, PA | Oil & Gas Property | Jun 2012 |
| 1072 | CARTY | Susquehanna County, PA | Gas Property | Jun 2025 |
| 1073 | CARTY WISEMAN 1 | Susquehanna County, PA | Gas Property | Jun 2025 |
| 1074 | CASHUP | Venango County, PA | Oil Property | Dec 2024 |
| 1075 | CASTLE | Bradford County, PA | Gas Property | Jun 2025 |
| 1076 | CASTLE 01 047 0 | Bradford County, PA | Gas Property | Jun 2025 |
| 1077 | CASTLE BROOK | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 1078 | CASTRO ET AL UNIT | Washington County, PA | Gas Property | Jun 2025 |
| 1079 | CASTROGIOVANNI A | Susquehanna County, PA | Gas Property | Jun 2025 |
| 1080 | CATALYST 5211 | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 1081 | CATHALEENE | Clearfield County, PA | Gas Property | Dec 2024 |
| 1082 | CATHCART NYAL M & LEWIS | Clearfield County, PA | Gas Property | Dec 2024 |
| 1083 | CATHERINE MOLNAR | Fayette County, PA | Gas Property | Dec 2020 |
| 1084 | CAYLOR | Jefferson County, PA | Gas Property | Dec 2024 |
| 1085 | CAYLOR | Jefferson County, PA | Gas Property | Dec 2024 |
| 1086 | CAYMAN | McKean County, PA | Oil & Gas Property | Dec 2024 |
| 1087 | CBC-MCKENDRICK | Indiana County, PA | Gas Property | Dec 2024 |
| 1088 | CBC/RHODES | Indiana County, PA | Gas Property | Dec 2024 |
| 1089 | CD SNYDER | Jefferson County, PA | Gas Property | Dec 2023 |
| 1090 | CD84 2 JK | Forest County, PA | Oil & Gas Property | Dec 2024 |
| 1091 | CDJ BRA | Bradford County, PA | Gas Property | Jun 2025 |
| 1092 | CEASE | Bradford County, PA | Gas Property | Jun 2025 |
| 1093 | CEASER UNIT | Butler County, PA | Oil & Gas Property | Jun 2025 |
| 1094 | CECILE C VAN CISE | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 1095 | CEMETERY | Warren County, PA | Oil Property | Dec 2024 |
| 1096 | CENKNER | Westmoreland County, PA | Gas Property | Dec 2024 |
| 1097 | CENTER TOWNSHIP | Indiana County, PA | Gas Property | Dec 2024 |
| 1098 | CENTRAL PA LUMBER CO | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 1099 | CERCA | Bradford County, PA | Gas Property | Jun 2025 |
| 1100 | CERULLO | Fayette County, PA | Gas Property | Dec 2024 |