1,037 hedge funds and large institutions have $34.9B invested in Biogen in 2021 Q3 according to their latest regulatory filings, with 72 funds opening new positions, 350 increasing their positions, 397 reducing their positions, and 124 closing their positions.

New
Increased
Maintained
Reduced
Closed

less ownership

Funds ownership:

less funds holding

Funds holding:

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less capital invested

Capital invested by funds: $ → $

27% less call options, than puts

Call options by funds: $1.24B | Put options by funds: $1.7B

42% less first-time investments, than exits

New positions opened: 72 | Existing positions closed: 124

44% less funds holding in top 10

Funds holding in top 10: 2715 (-12)

Holders
1,037
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
15
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.24B
Puts
$1.7B
Net Calls
Net Calls Change

Top Buyers

1 +$226M
2 +$136M
3 +$131M
4
JP Morgan Chase
JP Morgan Chase
New York
+$82.1M
5
Amundi
Amundi
France
+$77.1M

Top Sellers

1 -$210M
2 -$135M
3 -$115M
4
Renaissance Technologies
Renaissance Technologies
New York
-$114M
5
Northern Trust
Northern Trust
Illinois
-$101M
Name Holding Trade Value Shares
Change
Change in
Stake
826
$203K
827
$202K
828
$202K
829
$201K
830
$201K
831
$200K
832
$200K
833
$197K
834
$190K
835
$184K
836
$183K
837
$179K
838
$178K
839
$175K
840
$170K
841
$170K
842
$170K
843
$168K
844
$160K
845
$159K
846
$155K
847
$154K
848
$153K
849
$145K
850
$145K