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
726
$320K
727
$311K
728
$306K
729
$306K
730
$305K
731
$305K
732
$299K
733
$299K
734
$298K
735
$297K
736
$294K
737
$292K
738
$292K
739
$292K
740
$292K
741
$292K
742
$292K
743
$289K
744
$287K
745
$287K
746
$286K
747
$286K
748
$286K
749
$285K
750
$282K