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
451
$2.49M
452
$2.48M
453
$2.46M
454
$2.4M
455
$2.39M
456
$2.38M
457
$2.38M
458
$2.38M
459
$2.37M
460
$2.33M
461
$2.29M
462
$2.27M
463
$2.23M
464
$2.21M
465
$2.16M
466
$2.09M
467
$2.08M
468
$2.06M
469
$2.02M
470
$2.01M
471
$1.97M
472
$1.94M
473
$1.91M
474
$1.87M
475
$1.83M