| 4001 | NOFSINGER | Tuscarawas County, OH | Oil & Gas Property | Dec 2025 |
| 4002 | NOLAN NE CRC JF 3H | Jefferson County, OH | Gas Property | Mar 2026 |
| 4003 | NOLAN NW CRC JF 1H | Jefferson County, OH | Gas Property | Mar 2026 |
| 4004 | NOLAN S CRC JF | Jefferson County, OH | Gas Property | Mar 2026 |
| 4005 | NOLL | Noble County, OH | Oil & Gas Property | Dec 2024 |
| 4006 | NOON | Noble County, OH | Oil & Gas Property | Dec 2025 |
| 4007 | NORA GARBER | Coshocton County, OH | Oil & Gas Property | Dec 2025 |
| 4008 | NORBERT PLOSKI | Vinton County, OH | Oil & Gas Property | Dec 2025 |
| 4009 | NORMA 210 | Belmont County, OH | Oil & Gas Property | Mar 2026 |
| 4010 | NORMAN | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 4011 | NORRIS | Licking County, OH | Oil Property | Dec 2025 |
| 4012 | NORRIS | Knox County, OH | Oil & Gas Property | Dec 2025 |
| 4013 | NORRIS | Tuscarawas County, OH | Oil & Gas Property | Dec 2025 |
| 4014 | NORRIS | Washington County, OH | Oil & Gas Property | Dec 2005 |
| 4015 | NORRIS | Perry County, OH | Oil Property | Dec 2011 |
| 4016 | NORRIS | Washington County, OH | Oil & Gas Property | Dec 2022 |
| 4017 | NORRIS | Coshocton County, OH | Oil & Gas Property | Dec 1996 |
| 4018 | NORRIS-MILLER-PIKE | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 4019 | NORTH AMERICAN | Tuscarawas County, OH | Gas Property | Dec 2025 |
| 4020 | NORTH AMERICAN COAL | Tuscarawas County, OH | Oil & Gas Property | Dec 2025 |
| 4021 | NORTH AMERICAN COAL | Harrison County, OH | Oil & Gas Property | Mar 2026 |
| 4022 | NORTH AMERICAN COAL | Jefferson County, OH | Oil & Gas Property | Dec 2013 |
| 4023 | NORTH WEST UNIT 2 | Belmont County, OH | Gas Property | Mar 2026 |
| 4024 | NORTH WEST UNIT MED BL 4H | Belmont County, OH | Gas Property | Mar 2026 |
| 4025 | NORTHERN LIGHT | Meigs County, OH | Gas Property | Dec 2023 |
| 4026 | NORTHSTAR | Noble County, OH | Oil & Gas Property | Mar 2026 |
| 4027 | NORTHWESTERN MUTUAL LIFE INS CO | Cuyahoga County, OH | Oil & Gas Property | Dec 1993 |
| 4028 | NOSSE | Trumbull County, OH | Oil & Gas Property | Dec 2025 |
| 4029 | NOYES | Perry County, OH | Oil & Gas Property | Dec 1995 |
| 4030 | NUSSBAUM | Wayne County, OH | Oil & Gas Property | Dec 2025 |
| 4031 | NUTTER | Hocking County, OH | Oil & Gas Property | Dec 2025 |
| 4032 | NUTTER | Perry County, OH | Oil & Gas Property | Dec 2003 |
| 4033 | NUTTER BROTHERS | Hocking County, OH | Oil & Gas Property | Dec 2005 |
| 4034 | NUTTER/SUNDAY CREEK | Perry County, OH | Oil & Gas Property | Dec 2015 |
| 4035 | NUZUM W | Perry County, OH | Oil & Gas Property | Dec 1995 |
| 4036 | NYHART | Coshocton County, OH | Oil & Gas Property | Dec 2025 |
| 4037 | O FELUMLEE | Licking County, OH | Oil & Gas Property | Dec 2025 |
| 4038 | O OSBORN | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 4039 | O WAGNER | Washington County, OH | Oil & Gas Property | Dec 2025 |
| 4040 | O.P. RATLIFF | Vinton County, OH | Oil & Gas Property | Dec 2025 |
| 4041 | OAKLIEF-SHARROCK | Coshocton County, OH | Oil & Gas Property | Dec 2025 |
| 4042 | OAKWOOD CLUB | Cuyahoga County, OH | Oil & Gas Property | Dec 2015 |
| 4043 | OBANNON | Licking County, OH | Oil & Gas Property | Dec 2025 |
| 4044 | OBERLE-WILKES | Trumbull County, OH | Oil & Gas Property | Dec 2025 |
| 4045 | OBERMILLER | Wayne County, OH | Oil & Gas Property | Dec 2025 |
| 4046 | OBERNYER | Ashtabula County, OH | Oil & Gas Property | Dec 2025 |
| 4047 | OBERT | Summit County, OH | Oil & Gas Property | Dec 2025 |
| 4048 | OBERT J | Licking County, OH | Oil Property | Dec 2025 |
| 4049 | OBOY N CLR BL 5H | Belmont County, OH | Gas Property | Mar 2026 |
| 4050 | OBOY NE CLR BL | Belmont County, OH | Gas Property | Mar 2026 |
| 4051 | OBOY NW CLR BL 3H | Belmont County, OH | Gas Property | Mar 2026 |
| 4052 | OBOY SE CLR BL | Belmont County, OH | Gas Property | Mar 2026 |
| 4053 | OBOY SW CLR BL | Belmont County, OH | Gas Property | Mar 2026 |
| 4054 | OBRIEN | Monroe County, OH | Oil & Gas Property | Dec 2025 |
| 4055 | OBRIEN JAMES | Meigs County, OH | Oil & Gas Property | Dec 2023 |
| 4056 | OCEL | Carroll County, OH | Oil & Gas Property | Mar 2026 |
| 4057 | ODD JOB | Monroe County, OH | Gas Property | Mar 2026 |
| 4058 | ODEA | Stark County, OH | Oil & Gas Property | Dec 1990 |
| 4059 | ODONNELL | Licking County, OH | Oil & Gas Property | Dec 2025 |
| 4060 | ODONNELL | Licking County, OH | Oil & Gas Property | Dec 2015 |
| 4061 | OFARRELL | Perry County, OH | Oil Property | Dec 2017 |
| 4062 | OFFENBERGER | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 4063 | OGLE | Noble County, OH | Oil & Gas Property | Dec 2025 |
| 4064 | OGLE | Coshocton County, OH | Oil Property | Dec 2025 |
| 4065 | OHIO BAPTIST ACRES | Stark County, OH | Oil & Gas Property | Dec 2011 |
| 4066 | OHIO COMMERCE CENTER | Trumbull County, OH | Oil & Gas Property | Dec 2025 |
| 4067 | OHIO EDISON | Trumbull County, OH | Oil & Gas Property | Dec 2024 |
| 4068 | OHIO ELECTRIC CO | Gallia County, OH | Oil & Gas Property | Dec 1993 |
| 4069 | OHIO INDUSTRIAL SUPPLY | Tuscarawas County, OH | Oil & Gas Property | Dec 2025 |
| 4070 | OHIO MINING | Athens County, OH | Oil & Gas Property | Dec 2025 |
| 4071 | OHIO MINING CO | Athens County, OH | Oil & Gas Property | Dec 2015 |
| 4072 | OHIO POWER | Noble County, OH | Oil & Gas Property | Dec 2025 |
| 4073 | OHIO POWER | Washington County, OH | Oil & Gas Property | Dec 2015 |
| 4074 | OHIO POWER | Morgan County, OH | Oil & Gas Property | Dec 1998 |
| 4075 | OHIO POWER | Perry County, OH | Oil & Gas Property | Dec 2025 |
| 4076 | OHIO POWER | Morgan County, OH | Oil & Gas Property | Dec 2025 |
| 4077 | OHIO POWER | Morgan County, OH | Oil & Gas Property | Dec 2024 |
| 4078 | OHIO POWER | Morgan County, OH | Oil & Gas Property | Dec 2025 |
| 4079 | OHIO POWER | Morgan County, OH | Oil & Gas Property | Dec 2003 |
| 4080 | OHIO POWER | Noble County, OH | Oil & Gas Property | Dec 2025 |
| 4081 | OHIO POWER | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 4082 | OHIO POWER | Noble County, OH | Oil & Gas Property | Dec 2025 |
| 4083 | OHIO POWER | Gallia County, OH | Oil & Gas Property | Dec 2025 |
| 4084 | OHIO POWER | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 4085 | OHIO POWER CO | Noble County, OH | Oil & Gas Property | Dec 2025 |
| 4086 | OHIO POWER CO | Gallia County, OH | Oil & Gas Property | Dec 2025 |
| 4087 | OHIO POWER COMPANY | Morgan County, OH | Oil & Gas Property | Dec 1996 |
| 4088 | OHIO POWER COMPANY CM | Morgan County, OH | Oil & Gas Property | Dec 2013 |
| 4089 | OHIO VALLEY FARMS | Perry County, OH | Oil Property | Dec 2025 |
| 4090 | OHIO WATER SERVICE | Trumbull County, OH | Oil & Gas Property | Dec 2025 |
| 4091 | OKEEF | Mahoning County, OH | Oil & Gas Property | Dec 2025 |
| 4092 | OLD EDDY | Washington County, OH | Oil Property | Dec 2023 |
| 4093 | OLD OAK FARM 6-10-3 | Jefferson County, OH | Gas Property | Mar 2026 |
| 4094 | OLD STONE BANK | Summit County, OH | Oil & Gas Property | Dec 2009 |
| 4095 | OLINGER | Coshocton County, OH | Oil & Gas Property | Dec 2025 |
| 4096 | OLIVER | Guernsey County, OH | Oil & Gas Property | Dec 2024 |
| 4097 | OLIVER | Washington County, OH | Oil & Gas Property | Dec 2025 |
| 4098 | OLIVER CR MON | Carroll County, OH | Oil & Gas Property | Mar 2026 |
| 4099 | OLIVER E CLR BL 1 | Belmont County, OH | Gas Property | Mar 2026 |
| 4100 | OLIVER J | Guernsey County, OH | Oil & Gas Property | Dec 2018 |