SEI Investments
ANNX icon

SEI Investments’s Annexon ANNX Stock Holding History

SEI Investments’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 		$1.13M Buy
203,236
+144,977
+249% +$816K ﹤0.01% 2307
2025
Q4 		$292K Buy
+58,259
New +$223K ﹤0.01% 2757
2025
Q1 		– Sell
-10,319
Closed -$52.9K – 2764
2024
Q4 		$52.9K Hold
10,319
– – ﹤0.01% 2659
2024
Q3 		$61.1K Buy
+10,319
New +$61.2K ﹤0.01% 2615

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

SEI Investments's ANNX Position: Q1 2026 in Review

SEI Investments increased its Annexon (ANNX) stake by 249% in Q1 2026, buying an estimated $816K and bringing the position to 203,236 shares worth $1.13M. The position accounts for ﹤0.01% of the portfolio, ranked #2307.

SEI Investments first reported a position in ANNX in Q3 2024 and has held it in 4 quarters since. 217 funds tracked by Wall St. Rank hold ANNX as of Q1 2026.

  • SEI Investments held 203,236 shares of Annexon worth $1.13M as of Q1 2026.
  • SEI Investments bought 144,977 Annexon shares in Q1 2026, an estimated $816K.
  • Annexon made up ﹤0.01% of SEI Investments's portfolio in Q1 2026, its #2307 holding.
  • SEI Investments first reported a position in Annexon in Q3 2024 and has held it in 4 quarters since.
  • 217 funds tracked by Wall St. Rank held Annexon as of Q1 2026.

Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.