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Sirios Capital Management’s Annexon ANNX Stock Holding History

Sirios Capital Management’s Portfolio ANNX Stock Details ANNX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$3.25M Sell
569,276
-5,787
-1% -$32K 0.4% 52
2026
Q1 		$3.19M Sell
575,063
-135,193
-19% -$761K 0.39% 53
2025
Q4 		$3.57M Sell
710,256
-259,944
-27% -$994K 0.44% 43
2025
Q3 		$2.96M Sell
970,200
-19,377
-2% -$48.1K 0.39% 40
2025
Q2 		$2.37M Buy
989,577
+220,891
+29% +$443K 0.34% 44
2025
Q1 		$1.48M Buy
+768,686
New +$2.56M 0.26% 50

Other funds holding ANNX

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RG
Redmile Group San Francisco, California $1.49B AUM 208.7% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
BI
BVF Inc San Francisco, California $3.91B AUM 304.52% 1-Year Est. Return
WP
Woodline Partners San Francisco, California $32.4B AUM 58.5% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
MCO
MAK Capital One New York $714M AUM 68.07% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $4.94B AUM 244.43% 1-Year Est. Return

Sirios Capital Management's ANNX Position: Q2 2026 in Review

Sirios Capital Management reduced its Annexon (ANNX) stake by 1% in Q2 2026, selling an estimated $32K and leaving 569,276 shares worth $3.25M. The position accounts for 0.4% of the portfolio, ranked #52.

Sirios Capital Management first reported a position in ANNX in Q1 2025 and has held it in 6 quarters since. The position peaked at $3.57M in Q4 2025. 216 funds tracked by Wall St. Rank hold ANNX as of Q2 2026.

  • Sirios Capital Management held 569,276 shares of Annexon worth $3.25M as of Q2 2026.
  • Sirios Capital Management sold 5,787 Annexon shares in Q2 2026, an estimated $32K.
  • Annexon made up 0.4% of Sirios Capital Management's portfolio in Q2 2026, its #52 holding.
  • Sirios Capital Management first reported a position in Annexon in Q1 2025 and has held it in 6 quarters since.
  • Sirios Capital Management's Annexon position peaked at $3.57M in Q4 2025.
  • 216 funds tracked by Wall St. Rank held Annexon as of Q2 2026.

Based on Sirios Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.