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
601
$315K
602
$302K
603
$301K
604
$298K
605
$297K
606
$296K
607
$295K
608
$295K
609
$294K
610
$292K
611
$291K
612
$289K
613
$288K
614
$286K
615
$286K
616
$282K
617
$280K
618
$280K
619
$280K
620
$279K
621
$277K
622
$277K
623
$274K
624
$274K
625
$269K