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
501
$1.61M
502
$1.58M
503
$1.57M
504
$1.56M
505
$1.56M
506
$1.55M
507
$1.54M
508
$1.54M
509
$1.51M
510
$1.49M
511
$1.49M
512
$1.48M
513
$1.47M
514
$1.47M
515
$1.47M
516
$1.45M
517
$1.43M
518
$1.43M
519
$1.43M
520
$1.43M
521
$1.43M
522
$1.43M
523
$1.39M
524
$1.34M
525
$1.33M