870 hedge funds and large institutions have $20.2B invested in Biogen in 2024 Q4 according to their latest regulatory filings, with 130 funds opening new positions, 298 increasing their positions, 321 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: $25.1B → $20.2B (-$4.83B)

38% less funds holding in top 10

Funds holding in top 10: 85 (-3)

Holders
870
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
5
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$310M
Puts
$356M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
826
$2.59K
827
$2.45K
828
$2.45K
829
$2.45K
830
$2.29K
831
$2.29K
832
$2.29K
833
$2.29K
834
$2K
835
$1.99K
836
$1.99K
837
$1.84K
838
$1.84K
839
$1.84K
840
$1.68K
841
$1.53K
842
$1.38K
843
$1.38K
844
$1.22K
845
$1.07K
846
$1.07K
847
$1.07K
848
$1.05K
849
$999
850
$918