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
626
$674K
627
$671K
628
$669K
629
$659K
630
$659K
631
$651K
632
$648K
633
$640K
634
$631K
635
$626K
636
$619K
637
$618K
638
$618K
639
$600K
640
$598K
641
$595K
642
$584K
643
$584K
644
$584K
645
$584K
646
$578K
647
$575K
648
$569K
649
$565K
650
$553K