Biogen Idec Inc. 14 Cambridge Center Cambridge, Massachusetts 02142Employment Agreement • December 22nd, 2005 • Biogen Idec Inc • Biological products, (no disgnostic substances) • California
Reference is made to the Employment Agreement (the “Employment Agreement”) dated July 20, 2003 between you and Biogen Idec Inc. (the “Company”). This letter (the “Letter Agreement”) will set forth our mutual understanding as to the rights and obligations of you and the Company in connection with your retiring as the Executive Chairman and Chairman of the Board of Directors of the Company, effective as of December 30, 2005, and your resignation from the Board of Directors of the Company and from all other positions which you hold with the Company and its affiliates, which will also become effective as of December 30, 2005. Capitalized terms that are used but not defined herein shall have the meaning set forth in the Employment Agreement
