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
776
$211K
777
$208K
778
$208K
779
$207K
780
$204K
781
$204K
782
$200K
783
$200K
784
$193K
785
$187K
786
$181K
787
$180K
788
$178K
789
$156K
790
$150K
791
$144K
792
$143K
793
$142K
794
$140K
795
$136K
796
$136K
797
$134K
798
$128K
799
$122K
800
$118K