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
801
$210K
802
$206K
803
$203K
804
$202K
805
$202K
806
$202K
807
$201K
808
$201K
809
$193K
810
$187K
811
$175K
812
$175K
813
$160K
814
$155K
815
$153K
816
$146K
817
$132K
818
$132K
819
$127K
820
$120K
821
$117K
822
$117K
823
$116K
824
$115K
825
$111K