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
526
$608K
527
$608K
528
$607K
529
$600K
530
$598K
531
$591K
532
$589K
533
$587K
534
$584K
535
$577K
536
$570K
537
$570K
538
$567K
539
$559K
540
$559K
541
$546K
542
$546K
543
$540K
544
$532K
545
$528K
546
$514K
547
$510K
548
$507K
549
$503K
550
$497K