XT
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XTX Topco’s Annexon ANNX Stock Holding History

XTX Topco’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
Q1 		$446K Sell
80,495
-162,818
-67% -$917K 0.01% 2142
2025
Q4 		$1.22M Buy
243,313
+95,473
+65% +$365K 0.03% 884
2025
Q3 		$451K Buy
+147,840
New +$367K 0.02% 1151
2025
Q2 		– Sell
-58,130
Closed -$112K – 2318
2025
Q1 		$112K Buy
58,130
+22,979
+65% +$76.5K 0.01% 1843
2024
Q4 		$180K Buy
+35,151
New +$216K 0.01% 1591
2022
Q2 		– Sell
-36,742
Closed -$100K – 834
2022
Q1 		$100K Buy
+36,742
New +$226K 0.04% 517

Other funds holding ANNX

RG
Redmile Group San Francisco, California $1.51B AUM 164.17% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BI
BVF Inc San Francisco, California $3.14B AUM 249.53% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
BCLSI
Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return
BG
Bellevue Group Kuesnacht, Switzerland $4.2B AUM 54.85% 1-Year Est. Return
MCO
MAK Capital One New York $679M AUM 29.02% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return

XTX Topco's ANNX Position: Q1 2026 in Review

XTX Topco reduced its Annexon (ANNX) stake by 67% in Q1 2026, selling an estimated $917K and leaving 80,495 shares worth $446K. The position accounts for 0.01% of the portfolio, ranked #2142.

XTX Topco first reported a position in ANNX in Q1 2022 and has held it in 6 quarters since. The position peaked at $1.22M in Q4 2025. 217 funds tracked by Wall St. Rank hold ANNX as of Q1 2026.

  • XTX Topco held 80,495 shares of Annexon worth $446K as of Q1 2026.
  • XTX Topco sold 162,818 Annexon shares in Q1 2026, an estimated $917K.
  • Annexon made up 0.01% of XTX Topco's portfolio in Q1 2026, its #2142 holding.
  • XTX Topco first reported a position in Annexon in Q1 2022 and has held it in 6 quarters since.
  • XTX Topco's Annexon position peaked at $1.22M in Q4 2025.
  • 217 funds tracked by Wall St. Rank held Annexon as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.