1,122 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, 399 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: 89.15%89.1% (-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
1,122
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
926
$245K
927
$238K
928
$237K
929
$236K
930
$236K
931
$236K
932
$234K
933
$231K
934
$231K
935
$230K
936
$227K
937
$226K
938
$224K
939
$223K
940
$222K
941
$218K
942
$218K
943
$217K
944
$214K
945
$213K
946
$212K
947
$210K
948
$210K
949
$209K
950
$208K