Northern Trust
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Northern Trust’s Quantum-Si Incorporated QSI Stock Holding History

Northern Trust’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 		$399K Sell
450,531
-810,170
-64% -$771K ﹤0.01% 3726
2026
Q1 		$976K Sell
1,260,701
-947,235
-43% -$982K ﹤0.01% 3353
2025
Q4 		$2.43M Sell
2,207,936
-115,106
-5% -$187K ﹤0.01% 2883
2025
Q3 		$3.28M Buy
2,323,042
+33,586
+1% +$48.5K ﹤0.01% 2748
2025
Q2 		$4.49M Buy
2,289,456
+1,267,338
+124% +$1.87M ﹤0.01% 2518
2025
Q1 		$1.23M Buy
1,022,118
+180,972
+22% +$347K ﹤0.01% 3191
2024
Q4 		$2.27M Buy
841,146
+40,026
+5% +$46.9K ﹤0.01% 2956
2024
Q3 		$707K Buy
801,120
+18,930
+2% +$18.4K ﹤0.01% 3473
2024
Q2 		$821K Sell
782,190
-40,149
-5% -$64.4K ﹤0.01% 3329
2024
Q1 		$1.62M Sell
822,339
-2,048
-0.2% -$3.58K ﹤0.01% 3071
2023
Q4 		$1.66M Buy
824,387
+1,625
+0.2% +$2.48K ﹤0.01% 3100
2023
Q3 		$1.37M Buy
822,762
+43,920
+6% +$106K ﹤0.01% 3142
2023
Q2 		$1.39M Buy
778,842
+36,365
+5% +$57K ﹤0.01% 3214
2023
Q1 		$1.31M Sell
742,477
-28,530
-4% -$56.3K ﹤0.01% 3122
2022
Q4 		$1.41M Sell
771,007
-1,572
-0.2% -$4.05K ﹤0.01% 3151
2022
Q3 		$2.12M Sell
772,579
-2,039
-0.3% -$6.52K ﹤0.01% 2986
2022
Q2 		$1.8M Buy
774,618
+609,737
+370% +$2.34M ﹤0.01% 3119
2022
Q1 		$772K Sell
164,881
-3,997
-2% -$19.5K ﹤0.01% 3549
2021
Q4 		$1.33M Buy
168,878
+23,945
+17% +$180K ﹤0.01% 3429
2021
Q3 		$1.21M Buy
+144,933
New +$1.43M ﹤0.01% 3493

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

Northern Trust's QSI Position: Q2 2026 in Review

Northern Trust reduced its Quantum-Si Incorporated (QSI) stake by 64% in Q2 2026, selling an estimated $771K and leaving 450,531 shares worth $399K. The position accounts for ﹤0.01% of the portfolio, ranked #3726.

Northern Trust first reported a position in QSI in Q3 2021 and has held it in 20 quarters since. The position peaked at $4.49M in Q2 2025. 141 funds tracked by Wall St. Rank hold QSI as of Q2 2026.

  • Northern Trust held 450,531 shares of Quantum-Si Incorporated worth $399K as of Q2 2026.
  • Northern Trust sold 810,170 Quantum-Si Incorporated shares in Q2 2026, an estimated $771K.
  • Quantum-Si Incorporated made up ﹤0.01% of Northern Trust's portfolio in Q2 2026, its #3726 holding.
  • Northern Trust first reported a position in Quantum-Si Incorporated in Q3 2021 and has held it in 20 quarters since.
  • Northern Trust's Quantum-Si Incorporated position peaked at $4.49M in Q2 2025.
  • 141 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q2 2026.

Based on Northern Trust's 13F filing for Q2 2026, filed 13 Aug 2026.