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
401
$3.48M
402
$3.48M
403
$3.41M
404
$3.4M
405
$3.37M
406
$3.34M
407
$3.33M
408
$3.33M
409
$3.31M
410
$3.31M
411
$3.3M
412
$3.28M
413
$3.26M
414
$3.26M
415
$3.24M
416
$3.22M
417
$3.17M
418
$3.17M
419
$3.1M
420
$2.98M
421
$2.92M
422
$2.9M
423
$2.89M
424
$2.89M
425
$2.85M