Biogen Idec, Inc.

M&A Transactions Summary

Bought

Nov 2003
May 2006
Jan 2007
Dec 2010
Sept 2011
Feb 2012
Feb 2013

Sold

Jan 2005
June 2005
April 2006
Dec 2011
Dec 2011
Sept 2012

Private Placements

Jan 2012
Aug 2012