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
551
$1.17M
552
$1.16M
553
$1.16M
554
$1.15M
555
$1.15M
556
$1.15M
557
$1.14M
558
$1.13M
559
$1.13M
560
$1.12M
561
$1.12M
562
$1.09M
563
$1.09M
564
$1.08M
565
$1.08M
566
$1.07M
567
$1.05M
568
$1.04M
569
$1.04M
570
$1.01M
571
$1.01M
572
$1.01M
573
$976K
574
$960K
575
$934K