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
351
$5.45M
352
$5.41M
353
$5.34M
354
$5.26M
355
$5.17M
356
$5.1M
357
$5.02M
358
$5.02M
359
$4.93M
360
$4.93M
361
$4.87M
362
$4.86M
363
$4.8M
364
$4.77M
365
$4.75M
366
$4.75M
367
$4.75M
368
$4.74M
369
$4.73M
370
$4.72M
371
$4.71M
372
$4.67M
373
$4.6M
374
$4.52M
375
$4.42M