SEI Investments
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SEI Investments’s Quantum-Si Incorporated QSI Stock Holding History

SEI Investments’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
Q2 		– Sell
-33,103
Closed -$25.6K – 3385
2026
Q1 		$25.6K Hold
33,103
– – ﹤0.01% 3210
2025
Q4 		$36.4K Hold
33,103
– – ﹤0.01% 3093
2025
Q3 		$46.7K Hold
33,103
– – ﹤0.01% 2785
2025
Q2 		$64.9K Hold
33,103
– – ﹤0.01% 2732
2025
Q1 		$39.7K Hold
33,103
– – ﹤0.01% 2694
2024
Q4 		$89.4K Hold
33,103
– – ﹤0.01% 2602
2024
Q3 		$29.2K Hold
33,103
– – ﹤0.01% 2657
2024
Q2 		$34.8K Sell
33,103
-1,597
-5% -$2.56K ﹤0.01% 2610
2024
Q1 		$68.4K Buy
+34,700
New +$60.6K ﹤0.01% 2539

Other funds holding QSI

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
BlackRock
BlackRock New York $6.73T AUM 46.02% 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
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return

SEI Investments's QSI Position: Q2 2026 in Review

SEI Investments sold out of Quantum-Si Incorporated (QSI) in Q2 2026, closing a stake of 33,103 shares — an estimated $25.6K sold.

SEI Investments first reported a position in QSI in Q1 2024 and held it in 9 quarters. The position peaked at $89.4K in Q4 2024. 141 funds tracked by Wall St. Rank hold QSI as of Q2 2026.

  • SEI Investments reported no remaining Quantum-Si Incorporated position as of Q2 2026 after selling out during the quarter.
  • SEI Investments sold 33,103 Quantum-Si Incorporated shares in Q2 2026, an estimated $25.6K.
  • SEI Investments first reported a position in Quantum-Si Incorporated in Q1 2024 and held it in 9 quarters.
  • SEI Investments's Quantum-Si Incorporated position peaked at $89.4K in Q4 2024.
  • 141 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.