923 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, 407 increasing their positions, 283 reducing their positions, and 150 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
923
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
$1.85M
502
$1.84M
503
$1.83M
504
$1.82M
505
$1.75M
506
$1.7M
507
$1.7M
508
$1.67M
509
$1.67M
510
$1.64M
511
$1.64M
512
$1.63M
513
$1.61M
514
$1.6M
515
$1.59M
516
$1.58M
517
$1.51M
518
$1.5M
519
$1.49M
520
$1.46M
521
$1.46M
522
$1.43M
523
$1.42M
524
$1.41M
525
$1.4M