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
726
$297K
727
$295K
728
$295K
729
$294K
730
$294K
731
$291K
732
$290K
733
$286K
734
$278K
735
$275K
736
$273K
737
$272K
738
$268K
739
$264K
740
$258K
741
$257K
742
$255K
743
$255K
744
$253K
745
$253K
746
$250K
747
$250K
748
$249K
749
$246K
750
$239K