Simplex Trading
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Simplex Trading’s Quantum-Si Incorporated QSI Stock Holding History

Simplex Trading’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 		$219K Sell
283,200
-38,100
-12% -$39.5K ﹤0.01% 4204
2025
Q4 		$353K Buy
321,300
+163,900
+104% +$267K ﹤0.01% 3650
2025
Q3 		$221K Buy
157,400
+10,200
+7% +$14.7K ﹤0.01% 4827
2025
Q2 		$288K Sell
147,200
-45,200
-23% -$66.9K ﹤0.01% 4111
2025
Q1 		$230K Buy
192,400
+44,500
+30% +$85.3K ﹤0.01% 4171
2024
Q4 		$399K Buy
147,900
+87,700
+146% +$103K ﹤0.01% 3777
2024
Q3 		$53K Sell
60,200
-28,200
-32% -$27.4K ﹤0.01% 5833
2024
Q2 		$92K Buy
88,400
+36,900
+72% +$59.2K ﹤0.01% 5461
2024
Q1 		$101K Sell
51,500
-124,500
-71% -$218K ﹤0.01% 5564
2023
Q4 		$353K Sell
176,000
-14,800
-8% -$22.6K ﹤0.01% 4060
2023
Q3 		$316K Buy
190,800
+186,600
+4,443% +$449K ﹤0.01% 3885
2023
Q2 		$7K Hold
4,200
– – ﹤0.01% 7705
2023
Q1 		$7K Sell
4,200
-45,300
-92% -$89.4K ﹤0.01% 7842
2022
Q4 		$90K Sell
49,500
-42,400
-46% -$109K ﹤0.01% 5207
2022
Q3 		$252K Sell
91,900
-68,700
-43% -$220K ﹤0.01% 4308
2022
Q2 		$372K Buy
160,600
+56,100
+54% +$215K ﹤0.01% 3830
2022
Q1 		$489K Buy
104,500
+37,700
+56% +$184K ﹤0.01% 3869
2021
Q4 		$525K Sell
66,800
-39,900
-37% -$300K ﹤0.01% 3716
2021
Q3 		$1.29M Buy
106,700
+4,400
+4% +$43.3K ﹤0.01% 2737
2021
Q2 		$1.25M Buy
102,300
+101,977
+31,572% +$1.07M ﹤0.01% 2795
2021
Q1 		$385K Buy
+323
New +$3.9K ﹤0.01% 3766

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 $154B AUM 29.96% 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

Simplex Trading's QSI Position: Q1 2026 in Review

Simplex Trading increased its Quantum-Si Incorporated (QSI) stake by 12% in Q1 2026, buying an estimated $10.4K and bringing the position to 90,531 shares worth $70.1K. The position accounts for ﹤0.01% of the portfolio, ranked #5495.

Simplex Trading first reported a position in QSI in Q1 2021 and has held it in 13 quarters since. The position peaked at $828K in Q4 2024. 156 funds tracked by Wall St. Rank hold QSI as of Q1 2026.

  • Simplex Trading held 90,531 shares of Quantum-Si Incorporated worth $70.1K as of Q1 2026.
  • Simplex Trading bought 10,024 Quantum-Si Incorporated shares in Q1 2026, an estimated $10.4K.
  • Quantum-Si Incorporated made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #5495 holding.
  • Simplex Trading first reported a position in Quantum-Si Incorporated in Q1 2021 and has held it in 13 quarters since.
  • Simplex Trading's Quantum-Si Incorporated position peaked at $828K in Q4 2024.
  • 156 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q1 2026.

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