CAMBRIDGE, Mass.--(BUSINESS WIRE)--Biogen Idec Inc. (NASDAQ: BIIB) today announced the final results of its modified “Dutch Auction” tender offer which expired at 12:00 midnight ET on Tuesday, June 26, 2007. Biogen Idec has accepted for payment an aggregate of 56,424,155 shares of its common stock at a purchase price of $53.00 per share, for an aggregate share repurchase of approximately $3 billion. These shares represent approximately 16.4 percent of the shares outstanding as of June 26, 2007.