947 hedge funds and large institutions have $49.3B invested in Biogen in 2016 Q1 according to their latest regulatory filings, with 95 funds opening new positions, 364 increasing their positions, 350 reducing their positions, and 103 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
947
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
32
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.05B
Puts
$1.13B
Net Calls
Net Calls Change

Top Buyers

1 +$458M
2 +$148M
3 +$114M
4
VAM
Visium Asset Management
New York
+$99.3M
5
Invesco
Invesco
Georgia
+$89.1M
Name Holding Trade Value Shares
Change
Change in
Stake
776
$274K
777
$274K
778
$273K
779
$270K
780
$267K
781
$264K
782
$264K
783
$260K
784
$260K
785
$260K
786
$260K
787
$260K
788
$260K
789
$260K
790
$260K
791
$259K
792
$259K
793
$256K
794
$255K
795
$255K
796
$250K
797
$249K
798
$249K
799
$249K
800
$248K