American Century Companies
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American Century Companies’s Quantum-Si Incorporated QSI Stock Holding History

American Century Companies’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
2025
Q3 		– Sell
-12,036
Closed -$23.6K – 2863
2025
Q2 		$23.6K Buy
+12,036
New +$17.8K ﹤0.01% 2845
2024
Q2 		– Sell
-31,982
Closed -$63K – 2926
2024
Q1 		$63K Buy
+31,982
New +$55.9K ﹤0.01% 2887
2023
Q4 		– Sell
-28,169
Closed -$46.8K – 2915
2023
Q3 		$46.8K Buy
+28,169
New +$67.8K ﹤0.01% 2810

Other funds holding QSI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
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
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

American Century Companies's QSI Position: Q3 2025 in Review

American Century Companies sold out of Quantum-Si Incorporated (QSI) in Q3 2025, closing a stake of 12,036 shares — an estimated $23.6K sold.

American Century Companies first reported a position in QSI in Q3 2023 and held it in 3 quarters. The position peaked at $63K in Q1 2024. 125 funds tracked by Wall St. Rank hold QSI as of Q3 2025.

  • American Century Companies reported no remaining Quantum-Si Incorporated position as of Q3 2025 after selling out during the quarter.
  • American Century Companies sold 12,036 Quantum-Si Incorporated shares in Q3 2025, an estimated $23.6K.
  • American Century Companies first reported a position in Quantum-Si Incorporated in Q3 2023 and held it in 3 quarters.
  • American Century Companies's Quantum-Si Incorporated position peaked at $63K in Q1 2024.
  • 125 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q3 2025.

Based on American Century Companies's 13F filing for Q3 2025, filed 12 Nov 2025.