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
826
$110K
827
$110K
828
$108K
829
$106K
830
$105K
831
$99K
832
$99K
833
$98K
834
$97K
835
$96K
836
$95K
837
$94K
838
$92.2K
839
$83K
840
$82K
841
$80K
842
$73K
843
$70K
844
$70K
845
$68K
846
$65.7K
847
$63K
848
$58.4K
849
$58K
850
$58K