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
182,694,067
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares, excl. options
64,383,294
Holdings value
$90,787,757
% of all portfolios
0%
Number of holders
118
Number of buys
51
Number of sells
-62
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% $23,326,875 19,937,500 0% ROTHBERG JONATHAN M. 09 Sep 2025
VANGUARD GROUP INC 4.77% -10.6% $12,287,455 +$63,233 8,714,507 +0.52% The Vanguard Group 30 Sep 2025
ARK Investment Management LLC 4.77% -11.4% $11,792,099 -$1,365,288 7,809,337 -10.4% ARK Investment Management LLC 31 May 2025
Sumitomo Mitsui Trust Group, Inc. 4.8% $7,217,902 5,965,208 Sumitomo Mitsui Trust Group, Inc. 31 Dec 2024
Nikko Asset Management Americas, Inc. 4.85% $7,217,902 5,965,208 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 64,383,294 $90,787,757 -$423,392 $1.41 118
2025 Q2 64,302,080 $126,030,953 +$13,332,090 $1.96 131
2025 Q1 57,702,101 $69,187,968 +$4,278,851 $1.2 132
2024 Q4 53,650,133 $144,828,921 +$7,467,683 $2.7 119
2024 Q3 52,018,403 $45,873,394 -$1,304,094 $0.8822 106
2024 Q2 53,534,496 $56,052,952 +$296,093 $1.05 97
2024 Q1 52,939,609 $104,094,301 -$7,060,197 $1.97 93
2023 Q4 56,545,513 $113,571,460 +$3,979,280 $2.01 88
2023 Q3 54,518,149 $90,500,891 +$17,074,897 $1.66 94
2023 Q2 43,838,780 $78,455,574 +$764,050 $1.79 88
2023 Q1 43,470,316 $76,438,490 -$11,104,148 $1.76 95
2022 Q4 50,563,530 $92,475,906 +$3,565,426 $1.83 98
2022 Q3 47,618,704 $130,884,473 -$2,677,367 $2.75 96
2022 Q2 48,637,778 $139,588,569 +$2,799,359 $2.32 93
2022 Q1 45,913,518 $214,907,059 -$18,856,558 $4.68 86
2021 Q4 47,044,785 $370,416,832 +$7,975,560 $7.87 91
2021 Q3 44,603,838 $372,106,029 -$32,106,463 $8.34 70
2021 Q2 44,270,353 $533,450,402 +$533,145,402 $12.26 70