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
576
$924K
577
$911K
578
$905K
579
$904K
580
$895K
581
$886K
582
$879K
583
$875K
584
$875K
585
$875K
586
$873K
587
$867K
588
$859K
589
$847K
590
$843K
591
$837K
592
$836K
593
$832K
594
$827K
595
$816K
596
$807K
597
$806K
598
$801K
599
$801K
600
$795K