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
701
$359K
702
$357K
703
$351K
704
$350K
705
$344K
706
$339K
707
$339K
708
$339K
709
$339K
710
$339K
711
$339K
712
$339K
713
$339K
714
$334K
715
$333K
716
$331K
717
$329K
718
$328K
719
$316K
720
$312K
721
$306K
722
$306K
723
$306K
724
$301K
725
$297K