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
801
$117K
802
$115K
803
$114K
804
$113K
805
$105K
806
$102K
807
$102K
808
$102K
809
$98K
810
$93K
811
$88K
812
$88K
813
$87K
814
$86K
815
$84.9K
816
$73K
817
$71K
818
$68K
819
$64K
820
$63K
821
$56K
822
$50K
823
$43K
824
$35K
825
$35K