Biogen Idec CEO James Mullen retiring June 8; company starts search for successor

Biogen Idec CEO retiring in June

CAMBRIDGE, Mass. — Biogen Idec Inc. said Monday that CEO James C. Mullen will retire June 8 and the biotechnology company has started a search for his successor.

Mullen, 51, will also retire from the company’s board of directors when his term expires in 2010.

Shares of Biogen rose 14 cents to close at $53.64.