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
376
$4.42M
377
$4.41M
378
$4.41M
379
$4.38M
380
$4.31M
381
$4.29M
382
$4.25M
383
$4.23M
384
$4.22M
385
$4.21M
386
$4.2M
387
$4.16M
388
$4.08M
389
$4.07M
390
$4.04M
391
$4.03M
392
$4M
393
$3.97M
394
$3.94M
395
$3.94M
396
$3.9M
397
$3.89M
398
$3.85M
399
$3.84M
400
$3.82M