Investor Updates

Investor Update* Date DTE Energy's Summary of  Energy Legislation Passed by the Michigan Senate June 30, 2008 DTE Energy's Summary of  Energy Legislation Passed by the Michigan House April 18, 2008 Detroit Edison Rate Case Update Filing February 20, 2008 Detroit Edison Supplemental Rate Filing August 31, 2007 MichCon Gas Sale Settlement August 22, 2007 Detroit Edison Rate Filing Summary April 13, 2007 Detroit Edison Show Cause Settlement - Investor Summary August 31, 2006

* To view and print this information, you need Adobe® Acrobat® Reader.