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Annexon

165 hedge funds and large institutions have $687M invested in Annexon in 2025 Q4 according to their latest regulatory filings, with 40 funds opening new positions, 71 increasing their positions, 29 reducing their positions, and 15 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
165
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
$4.31M
Puts
$2.71M
Net Calls
Net Calls Change

Top Buyers

1 +$15.3M
2 +$14.3M
3 +$11.9M
4
MCO
MAK Capital One
New York
+$11.3M
5
State Street
State Street
Massachusetts
+$9.95M

Top Sellers

1 -$7.73M
2 -$3.61M
3 -$3.28M
4
RPAM
Rhenman & Partners Asset Management
Sweden
-$2.51M
5
Goldman Sachs
Goldman Sachs
New York
-$2.44M