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
451
$1.23M
452
$1.2M
453
$1.19M
454
$1.19M
455
$1.18M
456
$1.15M
457
$1.15M
458
$1.14M
459
$1.12M
460
$1.12M
461
$1.11M
462
$1.1M
463
$1.1M
464
$1.08M
465
$1.08M
466
$1.05M
467
$1.05M
468
$1.04M
469
$1.04M
470
$1.02M
471
$1.01M
472
$1.01M
473
$997K
474
$980K
475
$979K