Institutional investors hold a majority ownership of BIIB through the 92.60% of the outstanding shares that they control. This interest is also higher than at almost any other company in the Biotechnology industry. Last, during the quarter ended June 2014, these large investors purchased a net $3.6 million shares.
Mutual fund holders
Largest Quarterly Institutional Transactions
Latest Institutional Activity
FIDELITY MANAGEMENT & RESEARCH C... Bought 3.1 Million shares of Biogen Idec Inc