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
776
$6.53K
777
$6.42K
778
$6.12K
779
$6.12K
780
$6.1K
781
$6K
782
$5.66K
783
$5.66K
784
$5.66K
785
$5.61K
786
$5.5K
787
$5.35K
788
$5.35K
789
$5.2K
790
$5.05K
791
$4.89K
792
$4.59K
793
$4.59K
794
$4.59K
795
$4.59K
796
$4.43K
797
$4.43K
798
$4.28K
799
$4.28K
800
$4.28K