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
551
$1.03M
552
$1.02M
553
$1.02M
554
$1.02M
555
$1.02M
556
$1M
557
$983K
558
$975K
559
$961K
560
$958K
561
$957K
562
$947K
563
$941K
564
$926K
565
$897K
566
$883K
567
$883K
568
$883K
569
$874K
570
$871K
571
$869K
572
$861K
573
$849K
574
$841K
575
$841K