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
426
$2.85M
427
$2.84M
428
$2.82M
429
$2.8M
430
$2.78M
431
$2.77M
432
$2.73M
433
$2.72M
434
$2.71M
435
$2.71M
436
$2.71M
437
$2.69M
438
$2.68M
439
$2.65M
440
$2.64M
441
$2.62M
442
$2.61M
443
$2.61M
444
$2.61M
445
$2.59M
446
$2.58M
447
$2.56M
448
$2.54M
449
$2.52M
450
$2.49M