| 1001 | CLIFFORD CHANEY | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1002 | CLINE | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1003 | CLINE | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 1004 | CLINE | Washington County, OH | Oil & Gas Property | Dec 2025 |
| 1005 | CLINE | Licking County, OH | Oil & Gas Property | Dec 2024 |
| 1006 | CLINE | Washington County, OH | Oil & Gas Property | Dec 2025 |
| 1007 | CLINE DAV | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1008 | CLINE LUTHER (WOOL MICHAEL) | Monroe County, OH | Oil & Gas Property | Dec 2016 |
| 1009 | CLINGER | Morrow County, OH | Oil Property | Dec 2011 |
| 1010 | CLINTON OIL | Ashtabula County, OH | Oil & Gas Property | Dec 2015 |
| 1011 | CLINTON SLAUGHTER | Muskingum County, OH | Oil & Gas Property | Dec 2013 |
| 1012 | CLOSE | Holmes County, OH | Oil & Gas Property | Dec 2025 |
| 1013 | CLOSE | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1014 | CLOUSE | Perry County, OH | Oil & Gas Property | Dec 2025 |
| 1015 | CLUB NE SMF JF | Jefferson County, OH | Gas Property | Dec 2025 |
| 1016 | CLUB NW SMF JF | Jefferson County, OH | Gas Property | Dec 2025 |
| 1017 | CLUB SE SMF JF 8H | Jefferson County, OH | Gas Property | Dec 2025 |
| 1018 | CLUTTER | Knox County, OH | Oil & Gas Property | Dec 2024 |
| 1019 | CLYDE HENDERSON | Perry County, OH | Oil & Gas Property | Dec 2014 |
| 1020 | CNGD-ABRAMS | Geauga County, OH | Oil & Gas Property | Dec 2008 |
| 1021 | CNX UNIT OH121000 | Noble County, OH | Oil & Gas Property | Dec 2021 |
| 1022 | COAD OXF GR | Guernsey County, OH | Oil & Gas Property | Dec 2025 |
| 1023 | COAKLEY | Hocking County, OH | Oil & Gas Property | Dec 2025 |
| 1024 | COAL UNIT | Noble County, OH | Oil & Gas Property | Dec 2025 |
| 1025 | COBLE | Perry County, OH | Oil & Gas Property | Dec 2022 |
| 1026 | COBLENTZ | Holmes County, OH | Oil & Gas Property | Dec 2025 |
| 1027 | COBLENTZ | Holmes County, OH | Oil & Gas Property | Dec 2022 |
| 1028 | COBRA CDZ HR | Harrison County, OH | Oil & Gas Property | Dec 2025 |
| 1029 | COCHE | Perry County, OH | Oil & Gas Property | Dec 2002 |
| 1030 | COCHRAN | Licking County, OH | Oil Property | Dec 2016 |
| 1031 | COCHRELL | Wayne County, OH | Oil & Gas Property | Dec 2025 |
| 1032 | COCKS P B | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1033 | COE 34-12-4 | Carroll County, OH | Oil & Gas Property | Dec 2025 |
| 1034 | COFFEY | Athens County, OH | Oil & Gas Property | Dec 2025 |
| 1035 | COFFIELD | Belmont County, OH | Gas Property | Dec 2025 |
| 1036 | COFFMAN CLARENCE | Washington County, OH | Oil & Gas Property | Dec 2019 |
| 1037 | COFFMAN FARMS | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1038 | COLAIANNI | Jefferson County, OH | Gas Property | Dec 2025 |
| 1039 | COLBURN | Athens County, OH | Oil & Gas Property | Dec 2025 |
| 1040 | COLE | Guernsey County, OH | Oil & Gas Property | Dec 2025 |
| 1041 | COLE-KAESGEN | Holmes County, OH | Oil & Gas Property | Dec 2000 |
| 1042 | COLEMAN RCH BL | Belmont County, OH | Gas Property | Dec 2025 |
| 1043 | COLESCOTT 11-12-5 | Carroll County, OH | Oil & Gas Property | Dec 2025 |
| 1044 | COLLECTORS S NTG HR | Harrison County, OH | Oil & Gas Property | Dec 2025 |
| 1045 | COLLECTORS TRIANGLE S U | Monroe County, OH | Gas Property | Dec 2025 |
| 1046 | COLLINS | Jefferson County, OH | Gas Property | Dec 2025 |
| 1047 | COLLINS | Guernsey County, OH | Oil & Gas Property | Dec 2022 |
| 1048 | COLLINS | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1049 | COLOPY | Knox County, OH | Oil & Gas Property | Dec 2023 |
| 1050 | COLOPY | Knox County, OH | Oil & Gas Property | Dec 2024 |
| 1051 | COLOPY WILFORD | Knox County, OH | Oil & Gas Property | Dec 1995 |
| 1052 | COLUMBIA | Lorain County, OH | Oil & Gas Property | Dec 2021 |
| 1053 | COLUMBIA CEMENT | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 1054 | COLUMBIA FIRE BRICK CO | Tuscarawas County, OH | Gas Property | Dec 2025 |
| 1055 | COLUMBIA GAS TRANSMISSION | Hocking County, OH | Oil & Gas Property | Dec 2006 |
| 1056 | COLUMBUS B | Hocking County, OH | Oil & Gas Property | Dec 2024 |
| 1057 | COLUMBUS S | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 1058 | COLUMBUS SOUTHER | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 1059 | COLVILLE | Licking County, OH | Oil & Gas Property | Dec 2001 |
| 1060 | COLVIN | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 1061 | COMBS | Morgan County, OH | Oil & Gas Property | Dec 2024 |
| 1062 | COMFORT | Stark County, OH | Oil & Gas Property | Dec 2024 |
| 1063 | COMMISSIONERS | Guernsey County, OH | Oil & Gas Property | Dec 2025 |
| 1064 | COMMISSIONERS | Summit County, OH | Oil & Gas Property | Dec 2018 |
| 1065 | COMMUNITY IMPROVEMENT CORP | Mahoning County, OH | Oil & Gas Property | Dec 2025 |
| 1066 | COMP | Ashtabula County, OH | Oil & Gas Property | Dec 2024 |
| 1067 | COMSTOCK | Morrow County, OH | Oil & Gas Property | Dec 2025 |
| 1068 | CONARD | Coshocton County, OH | Oil Property | Dec 2024 |
| 1069 | CONE/HEMPHILL | Lake County, OH | Oil & Gas Property | Dec 2024 |
| 1070 | CONGER | Licking County, OH | Oil Property | Dec 2025 |
| 1071 | CONGLETON | Washington County, OH | Oil & Gas Property | Dec 2025 |
| 1072 | CONIGLIO 7-14-4 | Carroll County, OH | Oil & Gas Property | Dec 2025 |
| 1073 | CONKLE | Coshocton County, OH | Oil & Gas Property | Dec 2024 |
| 1074 | CONKLE | Hocking County, OH | Oil & Gas Property | Dec 2025 |
| 1075 | CONKLE C | Coshocton County, OH | Oil & Gas Property | Dec 2024 |
| 1076 | CONKLE JOHN | Coshocton County, OH | Oil & Gas Property | Dec 2023 |
| 1077 | CONKLIN 34-13-7 4 | Tuscarawas County, OH | Oil & Gas Property | Dec 2025 |
| 1078 | CONLEY DENVER & BONNIE | Medina County, OH | Oil & Gas Property | Dec 2007 |
| 1079 | CONNEAUT | Ashtabula County, OH | Oil & Gas Property | Dec 2024 |
| 1080 | CONNIE JO | Belmont County, OH | Gas Property | Dec 2025 |
| 1081 | CONOTTON | Carroll County, OH | Oil & Gas Property | Dec 2023 |
| 1082 | CONOTTON LAND | Tuscarawas County, OH | Oil & Gas Property | Dec 2025 |
| 1083 | CONOTTON LAND | Harrison County, OH | Oil & Gas Property | Dec 2025 |
| 1084 | CONOTTON LAND CO | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 1085 | CONRAD | Wayne County, OH | Oil & Gas Property | Dec 2025 |
| 1086 | CONRAD | Licking County, OH | Oil & Gas Property | Dec 2024 |
| 1087 | CONRAD | Licking County, OH | Oil Property | Dec 1989 |
| 1088 | CONRAD CG | Coshocton County, OH | Oil & Gas Property | Dec 2024 |
| 1089 | CONRAIL | Trumbull County, OH | Oil & Gas Property | Dec 2025 |
| 1090 | CONRAIL | Trumbull County, OH | Oil & Gas Property | Dec 2025 |
| 1091 | CONSERVATION LEAGUE | Trumbull County, OH | Oil & Gas Property | Dec 2024 |
| 1092 | CONSOL | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 1093 | CONSOL C | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1094 | CONSOL MINING COMPANY LLC SWITZ27 | Monroe County, OH | Gas Property | Dec 2025 |
| 1095 | CONSOLIDATED COAL | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1096 | CONSOLIDATED FREIGHTWAYS | Summit County, OH | Oil & Gas Property | Dec 2020 |
| 1097 | CONSOLIDATION CO | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1098 | CONSOLIDATION COAL | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1099 | CONSOLIDATION COAL C | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1100 | CONSOLIDATION COAL CO | Noble County, OH | Oil & Gas Property | Dec 2024 |