Quantum-Si Inc - Common Stock (QSI)

Historical Holders from Q2 2021 to Q3 2025

Symbol
QSI on Nasdaq
Type / Class
Equity / Common Stock
Shares outstanding
183M
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares, excl. options
64.4M
Holdings value
$90.8M
% of all portfolios
0%
Grand Portfolio weight change
0%
Number of holders
118
Number of buys
51
Number of sells
-62
Average Value change %
0%
Average buys %
+0%
Average sells %
0%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Quantum-Si Inc - Common Stock (QSI)

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
ROTHBERG JONATHAN M 100% 0% $23.3M 19.9M 0% ROTHBERG JONATHAN M. 09 Sep 2025
VANGUARD GROUP INC 4.77% -10.6% $12.3M $63.2K 8.71M +0.52% The Vanguard Group 30 Sep 2025
ARK Investment Management LLC 4.77% -11.4% $11.8M -$1.37M 7.81M -10.4% ARK Investment Management LLC 31 May 2025
Sumitomo Mitsui Trust Group, Inc. 4.8% $7.22M 5.97M Sumitomo Mitsui Trust Group, Inc. 31 Dec 2024
Nikko Asset Management Americas, Inc. 4.85% $7.22M 5.97M Nikko Asset Management Americas, Inc. 31 Dec 2024

Institutional Holders of Quantum-Si Inc - Common Stock (QSI)

Period Reported Shares, Excl. Options Value, Excl. Options Change Price Investors
2025 Q3 64.4M $90.8M -$423K $1.41 118
2025 Q2 64.3M $126M +$13.3M $1.96 131
2025 Q1 57.7M $69.2M +$4.28M $1.20 132
2024 Q4 53.7M $145M +$7.47M $2.70 119
2024 Q3 52M $45.9M -$1.3M $0.88 106
2024 Q2 53.5M $56.1M +$296K $1.05 97
2024 Q1 52.9M $104M -$7.06M $1.97 93
2023 Q4 56.5M $114M +$3.98M $2.01 88
2023 Q3 54.5M $90.5M +$17.1M $1.66 94
2023 Q2 43.8M $78.5M +$764K $1.79 88
2023 Q1 43.5M $76.4M -$11.1M $1.76 95
2022 Q4 50.6M $92.5M +$3.57M $1.83 98
2022 Q3 47.6M $131M -$2.68M $2.75 96
2022 Q2 48.6M $140M +$2.8M $2.32 93
2022 Q1 45.9M $215M -$18.9M $4.68 86
2021 Q4 47M $370M +$7.98M $7.87 91
2021 Q3 44.6M $372M -$32.1M $8.34 70
2021 Q2 44.3M $533M +$533M $12.26 70