Group One Trading
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Group One Trading’s Quantum-Si Incorporated QSI Stock Holding History

Group One 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
Q2 		$58.9K Buy
66,500
+13,400
+25% +$12.8K ﹤0.01% 5279
2026
Q1 		$41.1K Buy
53,100
+3,700
+7% +$3.83K ﹤0.01% 5404
2025
Q4 		$54.3K Buy
49,400
+8,100
+20% +$13.2K ﹤0.01% 5538
2025
Q3 		$58.2K Sell
41,300
-77,800
-65% -$112K ﹤0.01% 5825
2025
Q2 		$233K Buy
119,100
+20,800
+21% +$30.8K ﹤0.01% 4176
2025
Q1 		$118K Buy
98,300
+15,100
+18% +$28.9K ﹤0.01% 4466
2024
Q4 		$225K Buy
+83,200
New +$97.5K ﹤0.01% 3846
2024
Q2 		– Sell
-9,100
Closed -$17.9K – 7345
2024
Q1 		$17.9K Buy
9,100
+8,100
+810% +$14.2K ﹤0.01% 5503
2023
Q4 		$2.01K Sell
1,000
-4,000
-80% -$6.1K ﹤0.01% 6823
2023
Q3 		$8.3K Buy
+5,000
New +$12K ﹤0.01% 6456
2023
Q2 		– Sell
-400
Closed -$704 – 8107
2023
Q1 		$704 Sell
400
-2,000
-83% -$3.94K ﹤0.01% 6851
2022
Q4 		$4.39K Sell
2,400
-180,500
-99% -$465K ﹤0.01% 6394
2022
Q3 		$503K Buy
182,900
+180,400
+7,216% +$577K ﹤0.01% 3228
2022
Q2 		$6K Sell
2,500
-2,600
-51% -$9.96K ﹤0.01% 7019
2022
Q1 		$24K Sell
5,100
-11,900
-70% -$58K ﹤0.01% 6645
2021
Q4 		$134K Sell
17,000
-2,200
-11% -$16.6K ﹤0.01% 5468
2021
Q3 		$160K Buy
19,200
+3,500
+22% +$34.5K ﹤0.01% 5409
2021
Q2 		$192K Buy
15,700
+4,600
+41% +$48.2K ﹤0.01% 5290
2021
Q1 		$132K Buy
+11,100
New +$134K ﹤0.01% 5402

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

Group One Trading's QSI Position: Q2 2026 in Review

Group One Trading reduced its Quantum-Si Incorporated (QSI) stake by 62% in Q2 2026, selling an estimated $168K and leaving 107,473 shares worth $95.1K. The position accounts for ﹤0.01% of the portfolio, ranked #4903.

Group One Trading first reported a position in QSI in Q1 2021 and has held it in 9 quarters since. The position peaked at $533K in Q3 2025. 141 funds tracked by Wall St. Rank hold QSI as of Q2 2026.

  • Group One Trading held 107,473 shares of Quantum-Si Incorporated worth $95.1K as of Q2 2026.
  • Group One Trading sold 176,508 Quantum-Si Incorporated shares in Q2 2026, an estimated $168K.
  • Quantum-Si Incorporated made up ﹤0.01% of Group One Trading's portfolio in Q2 2026, its #4903 holding.
  • Group One Trading first reported a position in Quantum-Si Incorporated in Q1 2021 and has held it in 9 quarters since.
  • Group One Trading's Quantum-Si Incorporated position peaked at $533K in Q3 2025.
  • 141 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q2 2026.

Based on Group One Trading's 13F filing for Q2 2026, filed 14 Aug 2026.