738 hedge funds and large institutions have $60.8B invested in Biogen in 2013 Q4 according to their latest regulatory filings, with 121 funds opening new positions, 247 increasing their positions, 264 reducing their positions, and 30 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
738
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
$913M
Puts
$771M
Net Calls
Net Calls Change

Top Buyers

1 +$230M
2 +$201M
3 +$173M
4
Morgan Stanley
Morgan Stanley
New York
+$109M
5
Barclays
Barclays
United Kingdom
+$97.8M

Top Sellers

1 -$533M
2 -$447M
3 -$166M
4
UBS AM
UBS AM
Illinois
-$135M
5
Deutsche Bank
Deutsche Bank
Germany
-$134M
Name Holding Trade Value Shares
Change
Change in
Stake
401
$1.99M
402
$1.98M
403
$1.96M
404
$1.91M
405
$1.91M
406
$1.91M
407
$1.85M
408
$1.85M
409
$1.83M
410
$1.83M
411
$1.82M
412
$1.78M
413
$1.77M
414
$1.76M
415
$1.73M
416
$1.72M
417
$1.7M
418
$1.68M
419
$1.68M
420
$1.67M
421
$1.6M
422
$1.6M
423
$1.59M
424
$1.57M
425
$1.56M