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874 hedge funds and large institutions have $20.2B invested in Biogen in 2024 Q4 according to their latest regulatory filings, with 131 funds opening new positions, 300 increasing their positions, 322 reducing their positions, and 159 closing their positions.

New
Increased
Maintained
Reduced
Closed

1.72% more ownership

Funds ownership: 89.11%90.83% (+1.7%)

7% less repeat investments, than reductions

Existing positions increased: 300 | Existing positions reduced: 322

5% less funds holding

Funds holding: 916874 (-42)

13% less call options, than puts

Call options by funds: $310M | Put options by funds: $356M

18% less first-time investments, than exits

New positions opened: 131 | Existing positions closed: 159

19% less capital invested

Capital invested by funds: $25.1B → $20.2B (-$4.84B)

38% less funds holding in top 10

Funds holding in top 10: 85 (-3)

Holders
874
Holders Change
-42
Holders Change %
-4.59%
% of All Funds
11.51%
Holding in Top 10
5
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-37.5%
% of All Funds
0.07%
New
131
Increased
300
Reduced
322
Closed
159
Calls
$310M
Puts
$356M
Net Calls
-$45.6M
Net Calls Change
+$21.7M