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
651
$547K
652
$540K
653
$538K
654
$538K
655
$534K
656
$530K
657
$525K
658
$525K
659
$522K
660
$519K
661
$515K
662
$512K
663
$511K
664
$501K
665
$480K
666
$473K
667
$473K
668
$467K
669
$466K
670
$466K
671
$457K
672
$456K
673
$455K
674
$455K
675
$453K