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
351
$5.61M
352
$5.57M
353
$5.51M
354
$5.48M
355
$5.4M
356
$5.39M
357
$5.32M
358
$5.29M
359
$5.27M
360
$5.18M
361
$5.15M
362
$5.14M
363
$5.12M
364
$4.99M
365
$4.93M
366
$4.82M
367
$4.75M
368
$4.72M
369
$4.71M
370
$4.64M
371
$4.61M
372
$4.58M
373
$4.56M
374
$4.53M
375
$4.45M