865 hedge funds and large institutions have $20.1B invested in Biogen in 2024 Q4 according to their latest regulatory filings, with 130 funds opening new positions, 294 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: 130 | 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
865
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
826
$2.29K
827
$2.29K
828
$2.29K
829
$2K
830
$1.99K
831
$1.99K
832
$1.84K
833
$1.84K
834
$1.84K
835
$1.68K
836
$1.53K
837
$1.38K
838
$1.38K
839
$1.22K
840
$1.07K
841
$1.07K
842
$1.07K
843
$1.05K
844
$999
845
$918
846
$918
847
$918
848
$918
849
$918
850
$765