863 hedge funds and large institutions have $20.1B invested in Biogen in 2024 Q4 according to their latest regulatory filings, with 129 funds opening new positions, 293 increasing their positions, 320 reducing their positions, and 158 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less funds holding

Funds holding:

less call options, than puts

Call options by funds: $ | Put options by funds: $

18% less first-time investments, than exits

New positions opened: 129 | Existing positions closed: 158

19% less capital invested

Capital invested by funds: $24.9B → $20.1B (-$4.83B)

50% less funds holding in top 10

Funds holding in top 10: 84 (-4)

Holders
863
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
4
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$308M
Puts
$356M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
801
$4.28K
802
$4K
803
$3.82K
804
$3.82K
805
$3.67K
806
$3.52K
807
$3.42K
808
$3.36K
809
$3.36K
810
$3.21K
811
$3.06K
812
$3.06K
813
$3K
814
$2.75K
815
$2.75K
816
$2.75K
817
$2.6K
818
$2.59K
819
$2.59K
820
$2.45K
821
$2.45K
822
$2.45K
823
$2.29K
824
$2.29K
825
$2.29K