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
526
$1.32M
527
$1.31M
528
$1.31M
529
$1.31M
530
$1.3M
531
$1.3M
532
$1.28M
533
$1.26M
534
$1.23M
535
$1.22M
536
$1.21M
537
$1.2M
538
$1.16M
539
$1.15M
540
$1.14M
541
$1.12M
542
$1.12M
543
$1.09M
544
$1.07M
545
$1.05M
546
$1.05M
547
$1.05M
548
$1.04M
549
$1.04M
550
$1.03M