922 hedge funds and large institutions have $58.4B invested in Biogen in 2015 Q3 according to their latest regulatory filings, with 105 funds opening new positions, 406 increasing their positions, 283 reducing their positions, and 150 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
922
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
37
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.22B
Puts
$1.8B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
501
$1.84M
502
$1.83M
503
$1.82M
504
$1.75M
505
$1.7M
506
$1.7M
507
$1.67M
508
$1.67M
509
$1.64M
510
$1.64M
511
$1.63M
512
$1.61M
513
$1.6M
514
$1.59M
515
$1.58M
516
$1.51M
517
$1.5M
518
$1.49M
519
$1.46M
520
$1.46M
521
$1.43M
522
$1.42M
523
$1.41M
524
$1.4M
525
$1.4M