Vanguard Personalized Indexing Management
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Vanguard Personalized Indexing Management’s Quantum-Si Incorporated QSI Stock Holding History

Vanguard Personalized Indexing Management’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 		$18K Sell
20,350
-3,641
-15% -$3.47K ﹤0.01% 2209
2026
Q1 		$18.6K Buy
23,991
+192
+0.8% +$199 ﹤0.01% 2127
2025
Q4 		$26.2K Sell
23,799
-1,394
-6% -$2.27K ﹤0.01% 1927
2025
Q3 		$35.5K Buy
25,193
+1,102
+5% +$1.59K ﹤0.01% 1936
2025
Q2 		$47.2K Buy
24,091
+614
+3% +$908 ﹤0.01% 1831
2025
Q1 		$28.2K Buy
23,477
+3,532
+18% +$6.77K ﹤0.01% 1734
2024
Q4 		$53.9K Buy
19,945
+3,612
+22% +$4.23K ﹤0.01% 1692
2024
Q3 		$14.4K Buy
+16,333
New +$15.9K ﹤0.01% 1744

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

Vanguard Personalized Indexing Management's QSI Position: Q2 2026 in Review

Vanguard Personalized Indexing Management reduced its Quantum-Si Incorporated (QSI) stake by 15% in Q2 2026, selling an estimated $3.47K and leaving 20,350 shares worth $18K. The position accounts for ﹤0.01% of the portfolio, ranked #2209.

Vanguard Personalized Indexing Management first reported a position in QSI in Q3 2024 and has held it in 8 quarters since. The position peaked at $53.9K in Q4 2024. 141 funds tracked by Wall St. Rank hold QSI as of Q2 2026.

  • Vanguard Personalized Indexing Management held 20,350 shares of Quantum-Si Incorporated worth $18K as of Q2 2026.
  • Vanguard Personalized Indexing Management sold 3,641 Quantum-Si Incorporated shares in Q2 2026, an estimated $3.47K.
  • Quantum-Si Incorporated made up ﹤0.01% of Vanguard Personalized Indexing Management's portfolio in Q2 2026, its #2209 holding.
  • Vanguard Personalized Indexing Management first reported a position in Quantum-Si Incorporated in Q3 2024 and has held it in 8 quarters since.
  • Vanguard Personalized Indexing Management's Quantum-Si Incorporated position peaked at $53.9K in Q4 2024.
  • 141 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q2 2026.

Based on Vanguard Personalized Indexing Management's 13F filing for Q2 2026, filed 11 Aug 2026.