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
376
$4.44M
377
$4.43M
378
$4.43M
379
$4.35M
380
$4.23M
381
$4.14M
382
$4.14M
383
$4.07M
384
$4.05M
385
$4.03M
386
$4M
387
$3.97M
388
$3.96M
389
$3.94M
390
$3.9M
391
$3.85M
392
$3.83M
393
$3.8M
394
$3.75M
395
$3.66M
396
$3.62M
397
$3.6M
398
$3.58M
399
$3.56M
400
$3.56M