Institutional investors hold a majority ownership of BIIB through the 93.33% of the outstanding shares that they control. This interest is also higher than at almost any other company in the Biotechnology industry.
Mutual fund holders
Largest Quarterly Institutional Transactions
Latest Institutional Activity
AMERICAN CENTURY INVESTMENT MANA... Bought 193.4 Thousand shares of Biogen
TEKLA CAPITAL MANAGEMENT LLC Bought 140.5 Thousand shares of Biogen
OLD MUTUAL GLOBAL INVESTORS (UK)... Bought 82.2 Thousand shares of Biogen