923 hedge funds and large institutions have $58.4B invested in Biogen in 2015 Q3 according to their latest regulatory filings, with 105 funds opening new positions, 407 increasing their positions, 283 reducing their positions, and 150 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
923
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
37
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.22B
Puts
$1.8B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
451
$2.56M
452
$2.54M
453
$2.52M
454
$2.51M
455
$2.49M
456
$2.39M
457
$2.35M
458
$2.33M
459
$2.33M
460
$2.31M
461
$2.31M
462
$2.31M
463
$2.3M
464
$2.29M
465
$2.29M
466
$2.29M
467
$2.28M
468
$2.28M
469
$2.26M
470
$2.26M
471
$2.25M
472
$2.25M
473
$2.25M
474
$2.24M
475
$2.22M