Simplex Trading
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Simplex Trading’s Immuneering IMRX Stock Holding History

Simplex Trading’s Portfolio IMRX Stock Details IMRX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$110K Buy
20,800
+8,000
+63% +$41K ﹤0.01% 4973
2025
Q4 		$84.2K Buy
+12,800
New +$82.2K ﹤0.01% 5171

Other funds holding IMRX

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
S
Sanofi Paris, France $336M AUM 126.85% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
OCM
Occam Crest Management Darien, Connecticut $165M AUM
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Simplex Trading's IMRX Position: Q1 2026 in Review

Simplex Trading reduced its Immuneering (IMRX) stake by 31% in Q1 2026, selling an estimated $20.5K and leaving 8,942 shares worth $47.1K. The position accounts for ﹤0.01% of the portfolio, ranked #5942.

Simplex Trading first reported a position in IMRX in Q4 2025 and has held it in 2 quarters since. The position peaked at $85.2K in Q4 2025. 95 funds tracked by Wall St. Rank hold IMRX as of Q1 2026.

  • Simplex Trading held 8,942 shares of Immuneering worth $47.1K as of Q1 2026.
  • Simplex Trading sold 4,008 Immuneering shares in Q1 2026, an estimated $20.5K.
  • Immuneering made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #5942 holding.
  • Simplex Trading first reported a position in Immuneering in Q4 2025 and has held it in 2 quarters since.
  • Simplex Trading's Immuneering position peaked at $85.2K in Q4 2025.
  • 95 funds tracked by Wall St. Rank held Immuneering as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.