| Case Number | Case Title | Open Date | Closed Date |
| 05-1500-EL-COI | COMMISSION'S RESPONSE TO PROVISIONS OF THE FEDERAL ENERGY POLICY ACT OF 2005 | 12/08/2005 | 10/29/2009 |
| 10-0325-EL-COI | IN THE MATTER OF THE COMMISSION'S INVESTIGATION INTO THE TESTING AND VERIFICATION OF ADVANCED METERING INFRASTRUCTURE INSTALLATIONS | 03/24/2010 | 10/29/2015 |
| 97-1448-EL-COI | FIRSTENERGY CORP. TRANSMISSION SYS. | 11/06/1997 | 07/26/2013 |