| Case Number | Case Title | Open Date | Closed Date |
| 07-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 03/26/2007 | |
| 07-0501-EL-FOR | OHIO POWER COMPANY | 03/26/2007 | |
| 07-0502-EL-FOR | COLUMBUS SOUTHERN POWER COMPANY | 03/26/2007 | |
| 07-0504-EL-FOR | FIRSTENERGY CORPORATION | 03/26/2007 | |
| 07-0505-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 03/26/2007 | |
| 08-0501-EL-FOR | OHIO POWER COMPANY | 01/04/2008 | |
| 08-0502-EL-FOR | COLUMBUS SOUTHERN POWER COMPANY | 01/04/2008 | |
| 08-0504-EL-FOR | FIRSTENERGY CORPORATION | 01/04/2008 | |
| 08-0505-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 01/04/2008 | |
| 09-0501-EL-FOR | OHIO POWER COMPANY | 04/15/2009 | |
| 09-0502-EL-FOR | COLUMBUS SOUTHERN POWER COMPANY | 04/15/2009 | |
| 09-0504-EL-FOR | FIRSTENERGY CORPORATION | 04/15/2009 | |
| 09-0505-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 03/24/2009 | |
| 10-0503-EL-FOR | DUKE ENERGY OF OHIO CORPORATION | 03/25/2010 | |
| 10-0504-EL-FOR | FIRSTENERGY CORPORATION | 03/25/2010 | |
| 10-0505-EL-FOR | DAYTON POWER & LIGHT COMPANY | 03/25/2010 | |
| 11-1435-EL-FOR | FIRSTENERGY CORPORATION | 03/31/2011 | |
| 11-2500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 04/15/2011 | |
| 11-2501-EL-FOR | OHIO POWER COMPANY | 04/15/2011 | |
| 11-2502-EL-FOR | COLUMBUS SOUTHERN POWER COMPANY | 04/15/2011 | |
| 11-2505-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 04/15/2011 | |
| 12-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 04/13/2012 | |
| 12-0501-EL-FOR | OHIO POWER COMPANY | 03/21/2012 | |
| 12-0504-EL-FOR | FIRSTENERGY CORPORATION | 04/16/2012 | |
| 12-0505-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 04/13/2012 | |
| 12-1501-EL-FOR | OHIO TRANSCO | 04/13/2012 | |
| 13-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 04/15/2013 | |
| 13-0501-EL-FOR | OHIO POWER COMPANY | 03/01/2013 | |
| 13-0810-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 04/15/2013 | |
| 13-0925-EL-FOR | OHIO EDISON COMPANY/THE CLEVELAND ELECTRIC ILLUMINATING COMPANY/THE TOLEDO EDISON COMPANY/AMERICAN TRANSMISSION SYSTEMS INCORPORATED | 04/15/2013 | |
| 13-1501-EL-FOR | AEP OHIO TRANSMISSION COMPANY | 04/15/2013 | |
| 14-0501-EL-FOR | OHIO POWER COMPANY | 04/15/2014 | |
| 14-0536-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 04/15/2014 | |
| 14-0625-EL-FOR | Ohio Edison Company, The Cleveland Electric Illuminating Company, the Toledo Edison Company | 04/15/2014 | |
| 14-1501-EL-FOR | AEP OHIO TRANSMISSION COMPANY | 04/15/2014 | |
| 15-0501-EL-FOR | OHIO POWER COMPANY | 04/15/2015 | |
| 15-0649-EL-FOR | Ohio Edison Company, The Cleveland Electric Illuminating Company, The Toledo Edison Company | 04/15/2015 | |
| 15-0663-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 04/14/2015 | |
| 16-0501-EL-FOR | OHIO POWER COMPANY | 04/15/2016 | |
| 16-0582-EL-FOR | Ohio Edison Company, The Cleveland Electric Illuminating Company, The Toledo Edison Company, and American Transmission Systems, Inc. | 03/29/2016 | |
| 16-0588-EL-FOR | Duke Energy Ohio, Inc. | 03/18/2016 | |
| 16-0724-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 04/15/2016 | |
| 17-0501-EL-FOR | AMERICAN ELECTRIC POWER OHIO | 04/17/2017 | |
| 17-0888-EL-FOR | Duke Energy Ohio, Inc. | 03/31/2017 | |
| 17-0913-EL-FOR | Ohio Edison Company, The Cleveland Electric Illuminating Company, The Toledo Edison Company | 04/07/2017 | |
| 17-0928-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 04/11/2017 | |
| 17-1501-EL-FOR | AEP OHIO TRANSCO | 04/17/2017 | |
| 18-0449-EL-FOR | Ohio Edison Company, The Cleveland Electric Illuminating Company, The Toledo Edison Company | 04/16/2018 | |
| 18-0467-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 04/13/2018 | |
| 18-0484-EL-FOR | Duke Energy Ohio, Inc. | 03/21/2018 | |
| 18-0501-EL-FOR | AEP Ohio | 04/16/2018 | |
| 19-0500-EL-FOR | OVEC | 04/15/2019 | |
| 19-0501-EL-FOR | AEP OHIO | 04/15/2019 | |
| 19-0590-EL-FOR | In the Matter of the Long-Term Forecast and Resource Plan of Duke Energy Ohio, Inc. | 03/07/2019 | |
| 19-0806-EL-FOR | In the Matter of the Long-Term Forecast Report of Ohio Edison Company, The Cleveland Electric Illuminating Company, The Toledo Edison Company, and Ame | 04/15/2019 | |
| 19-0871-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 04/12/2019 | |
| 19-1501-EL-FOR | AEP TRANSCO | 04/15/2019 | |
| 20-0375-EL-FOR | In the Matter of the Long-Term Forecast and Resource Plan of Duke Energy Ohio, Inc. | 02/18/2020 | |
| 20-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 03/25/2020 | |
| 20-0501-EL-FOR | OHIO POWER COMPANY | 03/24/2020 | |
| 20-0657-EL-FOR | Ohio Edison Company and The Cleveland Electric Illuminating Company and The Toledo Edison Company | 04/15/2020 | |
| 20-0768-EL-FOR | DAYTON POWER AND LIGHT COMPANY
| 04/14/2020 | |
| 20-0942-EL-FOR | Amp Transmission LLC | 04/27/2020 | |
| 20-1501-EL-FOR | AEP OHIO TRANSCO | 03/24/2020 | |
| 21-0439-EL-FOR | In the Matter of the 2021 Long-Term Forecast Report of AMP Transmission, LLC and Related Matters | 04/15/2021 | |
| 21-0500-EL-FOR | In the Matter of the 2021 Long-Term Forecast Report of Ohio Valley Electric Corporation and Related Matters. | 01/25/2021 | |
| 21-0501-EL-FOR | In the Matter of the 2021 Long-Term Forecast Report of Ohio Power Company and Related Matters. | 01/25/2021 | |
| 21-0503-EL-FOR | In the Matter of the 2021 Long-Term Forecast Report of Duke Energy of Ohio Corporation and Related Matters. | 01/25/2021 | |
| 21-0504-EL-FOR | In the Matter of the 2021 Long-Term Forecast Report of Ohio Edison Company, The Cleveland Electric Illuminating Company, The Toledo Edison Company and | 01/25/2021 | |
| 21-0505-EL-FOR | In the Matter of the 2021 Long-Term Forecast Report of Dayton Power and Light Company and Related Matters. | 01/25/2021 | |
| 21-1501-EL-FOR | In the Matter of the 2021 Long-Term Forecast Report of AEP Ohio Transmission Company, Inc. and Related Matters. | 01/25/2021 | |
| 22-0107-EL-FOR | In the Matter of the Long-Term Forecast and Resource Plan of Duke Energy Ohio, Inc.
| 02/14/2022 | |
| 22-0362-EL-FOR | In the Matter of the Long-Term Forecast Report of AMP Transmission, LLC and Related Matters | 04/12/2022 | |
| 22-0500-EL-FOR | Ohio Valley Electric Corporation | 02/15/2022 | |
| 22-0501-EL-FOR | AEP (Ohio Power Company) | 02/15/2022 | |
| 22-0503-EL-FOR | Duke Energy of Ohio Corporation | 02/15/2022 | |
| 22-0504-EL-FOR | First Energy Corporation (Ohio Edison Company, The Cleveland Electric Illuminating Company, The Toledo Edison Company) | 02/15/2022 | |
| 22-0505-EL-FOR | Dayton Power and Light Company | 02/15/2022 | |
| 22-1501-EL-FOR | AEP Ohio Transco | 02/15/2022 | |
| 23-0378-EL-FOR | In the Matter of the Long-Term Forecast Report of AMP Transmission, LLC and Related Matters | 04/12/2023 | |
| 23-0500-EL-FOR | OHIO VALLEY ELECTRIC CORPORATION | 01/03/2023 | |
| 23-0501-EL-FOR | AEP OHIO (OHIO POWER COMPANY) | 01/03/2023 | |
| 23-0503-EL-FOR | DUKE ENERGY OHIO CORPORATION | 01/03/2023 | |
| 23-0504-EL-FOR | FIRSTENERGY CORPORATION (OHIO EDISON COMPANY, THE CLEVELAND ELECTRIC ILLUMINATING COMPANY, THE TOLEDO EDISON COMPANY) | 01/03/2023 | |
| 23-0505-EL-FOR | DAYTON POWER AND LIGHT COMPANY | 01/03/2023 | |
| 23-1501-EL-FOR | AEP OHIO TRANSCO | 01/03/2023 | |
| 24-0366-EL-FOR | In the Matter of the Long-Term Forecast Report of AMP Transmission, LLC and Related Matters | 04/12/2024 | |
| 24-0500-EL-FOR | Ohio Valley Electric Corporation | 01/02/2024 | |
| 24-0501-EL-FOR | AEP Ohio (Ohio Power Company) | 01/02/2024 | |
| 24-0503-EL-FOR | Duke Energy of Ohio Corporation | 01/02/2024 | |
| 24-0504-EL-FOR | First Energy Corporation (Ohio Edison Company, The Cleveland Electric Illuminating Company, The Toledo Edison Company) | 01/02/2024 | |
| 24-0505-EL-FOR | The Dayton Power and Light Company d/b/a AES Ohio | 01/02/2024 | |
| 24-1501-EL-FOR | AEP Ohio Transco | 01/02/2024 | |