| Case Number | Case Title | Open Date | Closed Date |
| 08-0883-EL-AEC | COLUMBUS SOUTHERN POWER COMPANY AND SOLSIL INC. | 07/16/2008 | 02/15/2017 |
| 08-0884-EL-AEC | OHIO POWER COMPANY AND GLOBE METALLURGICAL INC | 07/16/2008 | 02/15/2017 |
| 08-1100-EL-AEC | OHIO VALLEY ELECTRIC CORPORATION | 09/19/2008 | 08/20/2010 |
| 09-0119-EL-AEC | ORMET PRIMARY ALUMINUM CORPORATION | 02/17/2009 | 03/22/2019 |
| 09-0702-EL-AEC | THE DAYTON POWER AND LIGHT COMPANY/AIRGAS INC | 08/07/2009 | 02/21/2013 |
| 09-1818-EL-AEC | UNIVERSITY OF CINCINNATI/DUKE ENERGY OHIO INC | 11/17/2009 | 03/21/2011 |
| 10-3066-EL-AEC | TIMKENSTEEL CORPORATION/OHIO POWER COMPANY | 12/20/2010 | 10/29/2015 |
| 11-2336-EL-AEC | CALISOLAR INC | 04/08/2011 | 08/03/2011 |
| 14-1009-EL-AEC | WARREN STEEL HOLDINGS LLC | 06/04/2014 | 09/23/2014 |
| 17-2132-EL-AEC | Ohio Power Company / Acero Junction Inc | 10/18/2017 | 04/05/2019 |
| 18-0450-EL-AEC | AK Steel Corporation/ Duke Energy Ohio, Inc. | 03/15/2018 | 04/05/2019 |
| 92-1743-EL-AEC | CLEVELAND ELECTRIC ILLUMINATING CO. | 10/02/1992 | 01/07/1993 |
| 95-0077-EL-AEC | CEI/AMERICAN STEEL & WIRE CORP. | 01/23/1995 | 09/06/1995 |
| 95-0910-EL-AEC | TOLEDO EDISON/NORTH STAR STEEL-BHP | 10/02/1995 | 10/31/1996 |
| 95-1137-EL-AEC | DP&L/GENERAL MOTORS CORPORATION | 12/08/1995 | 07/31/1997 |
| 96-0225-EL-AEC | DP&L/HONDA OF AMERICAN MFG. | 03/01/1996 | 07/31/1997 |
| 96-0323-EL-AEC | DP&L/AGA GAS | 04/01/1996 | 07/31/1997 |