Two Sigma Investments
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Two Sigma Investments’s Quantum-Si Incorporated QSI Stock Holding History

Two Sigma 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
Q1 		$41K Sell
52,924
-1,331,257
-96% -$1.38M ﹤0.01% 4466
2025
Q4 		$1.52M Buy
1,384,181
+868,329
+168% +$1.41M ﹤0.01% 2647
2025
Q3 		$727K Sell
515,852
-48,590
-9% -$70.2K ﹤0.01% 2788
2025
Q2 		$1.11M Sell
564,442
-252,533
-31% -$374K ﹤0.01% 2186
2025
Q1 		$980K Buy
816,975
+664,292
+435% +$1.27M ﹤0.01% 2190
2024
Q4 		$412K Buy
+152,683
New +$179K ﹤0.01% 2622
2024
Q3 		– Sell
-89,261
Closed -$93.7K – 3300
2024
Q2 		$93.7K Sell
89,261
-43,295
-33% -$69.4K ﹤0.01% 2831
2024
Q1 		$261K Buy
132,556
+56,665
+75% +$99K ﹤0.01% 2613
2023
Q4 		$153K Sell
75,891
-6,900
-8% -$10.5K ﹤0.01% 2890
2023
Q3 		$137K Buy
82,791
+45,700
+123% +$110K ﹤0.01% 2706
2023
Q2 		$66.4K Sell
37,091
-5,937
-14% -$9.3K ﹤0.01% 2798
2023
Q1 		$75.7K Sell
43,028
-3,172
-7% -$6.26K ﹤0.01% 2707
2022
Q4 		$84.5K Buy
+46,200
New +$119K ﹤0.01% 2531

Other funds holding QSI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
AIM
ARK Investment Management St. Petersburg, Florida $12.9B AUM 64.92% 1-Year Est. Return
NAMA
Nikko Asset Management Americas New York $7.07B AUM 50.91% 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 $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Two Sigma Investments's QSI Position: Q1 2026 in Review

Two Sigma Investments reduced its Quantum-Si Incorporated (QSI) stake by 96% in Q1 2026, selling an estimated $1.38M and leaving 52,924 shares worth $41K. The position accounts for ﹤0.01% of the portfolio, ranked #4466.

Two Sigma Investments first reported a position in QSI in Q4 2022 and has held it in 13 quarters since. The position peaked at $1.52M in Q4 2025. 156 funds tracked by Wall St. Rank hold QSI as of Q1 2026.

  • Two Sigma Investments held 52,924 shares of Quantum-Si Incorporated worth $41K as of Q1 2026.
  • Two Sigma Investments sold 1,331,257 Quantum-Si Incorporated shares in Q1 2026, an estimated $1.38M.
  • Quantum-Si Incorporated made up ﹤0.01% of Two Sigma Investments's portfolio in Q1 2026, its #4466 holding.
  • Two Sigma Investments first reported a position in Quantum-Si Incorporated in Q4 2022 and has held it in 13 quarters since.
  • Two Sigma Investments's Quantum-Si Incorporated position peaked at $1.52M in Q4 2025.
  • 156 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q1 2026.

Based on Two Sigma Investments's 13F filing for Q1 2026, filed 15 May 2026.