QC
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Quadrature Capital’s Quantum-Si Incorporated QSI Stock Holding History

Quadrature Capital’s Portfolio QSI Stock Details QSI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-276,889
Closed -$305K – 1762
2025
Q4 		$305K Buy
+276,889
New +$451K ﹤0.01% 845

Other funds holding QSI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AIM
ARK Investment Management St. Petersburg, Florida $15.4B AUM 50.29% 1-Year Est. Return
NAMA
Nikko Asset Management Americas New York $7.75B AUM 33.73% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Quadrature Capital's QSI Position: Q1 2026 in Review

Quadrature Capital sold out of Quantum-Si Incorporated (QSI) in Q1 2026, closing a stake of 276,889 shares — an estimated $305K sold.

Quadrature Capital first reported a position in QSI in Q4 2025 and held it in 1 quarter. The position peaked at $305K in Q4 2025. 157 funds tracked by Wall St. Rank hold QSI as of Q1 2026.

  • Quadrature Capital reported no remaining Quantum-Si Incorporated position as of Q1 2026 after selling out during the quarter.
  • Quadrature Capital sold 276,889 Quantum-Si Incorporated shares in Q1 2026, an estimated $305K.
  • Quadrature Capital first reported a position in Quantum-Si Incorporated in Q4 2025 and held it in 1 quarter.
  • Quadrature Capital's Quantum-Si Incorporated position peaked at $305K in Q4 2025.
  • 157 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q1 2026.

Based on Quadrature Capital's 13F filing for Q1 2026, filed 15 May 2026.