1,121 hedge funds and large institutions have $60B invested in Biogen in 2017 Q4 according to their latest regulatory filings, with 167 funds opening new positions, 398 increasing their positions, 384 reducing their positions, and 48 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding

Funds holding:

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more capital invested

Capital invested by funds: $ → $

0.05% less ownership

Funds ownership: 89.14%89.09% (-0.05%)

26% less funds holding in top 10

Funds holding in top 10: 3828 (-10)

32% less call options, than puts

Call options by funds: $989M | Put options by funds: $1.44B

Holders
1,121
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
28
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$989M
Puts
$1.44B
Net Calls
Net Calls Change

Top Buyers

1 +$618M
2 +$232M
3 +$157M
4
Balyasny Asset Management
Balyasny Asset Management
Illinois
+$123M
5
JP Morgan Chase
JP Morgan Chase
New York
+$106M

Top Sellers

1 -$684M
2 -$230M
3 -$160M
4
Bank of America
Bank of America
North Carolina
-$155M
5
O
OrbiMed
New York
-$127M
Name Holding Trade Value Shares
Change
Change in
Stake
976
$148K
977
$138K
978
$136K
979
$135K
980
$133K
981
$133K
982
$133K
983
$132K
984
$129K
985
$127K
986
$127K
987
$127K
988
$127K
989
$123K
990
$123K
991
$120K
992
$119K
993
$117K
994
$115K
995
$113K
996
$107K
997
$104K
998
$103K
999
$102K
1000
$100K