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
476
$1.82M
477
$1.81M
478
$1.81M
479
$1.81M
480
$1.8M
481
$1.78M
482
$1.77M
483
$1.76M
484
$1.74M
485
$1.73M
486
$1.71M
487
$1.71M
488
$1.71M
489
$1.71M
490
$1.71M
491
$1.7M
492
$1.7M
493
$1.69M
494
$1.68M
495
$1.68M
496
$1.66M
497
$1.66M
498
$1.66M
499
$1.66M
500
$1.61M