884 hedge funds and large institutions have $72.3B invested in Biogen in 2014 Q4 according to their latest regulatory filings, with 130 funds opening new positions, 343 increasing their positions, 279 reducing their positions, and 54 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
884
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
52
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$975M
Puts
$1.36B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
601
$679K
602
$679K
603
$679K
604
$679K
605
$679K
606
$678K
607
$668K
608
$668K
609
$665K
610
$664K
611
$660K
612
$645K
613
$642K
614
$636K
615
$633K
616
$628K
617
$627K
618
$626K
619
$626K
620
$621K
621
$619K
622
$618K
623
$614K
624
$593K
625
$577K