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
601
$793K
602
$793K
603
$792K
604
$788K
605
$788K
606
$781K
607
$779K
608
$766K
609
$765K
610
$759K
611
$754K
612
$753K
613
$752K
614
$744K
615
$733K
616
$730K
617
$730K
618
$730K
619
$726K
620
$722K
621
$698K
622
$696K
623
$695K
624
$690K
625
$680K