Quantum-Si Incorporated

Historical 13F Holders

Symbol
QSI
CUSIP
74765K105
All holders as of
Q2 2026
Type
Equity
Class
COM CL A
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 74765K105 since 12/18/2024, newest first.

Filer % of Class Filed
Rothberg Jonathan M 13D/A Amendment 5
100.0% 8/28/2026
Event 8/26/2026
BlackRock, Inc. 13G/A Amendment 2 2.3% 7/29/2026
Event 6/30/2026
Vanguard Group Inc 13G/A Amendment 1 4.8% 10/30/2025
Event 9/30/2025
Rothberg Jonathan M 13D/A Amendment 4
100.0% 9/11/2025
Event 9/9/2025
Vanguard Group Inc 13G 5.3% 7/29/2025
Event 6/30/2025
ARK Investment Management LLC 13G/A Amendment 8
4.8% 6/6/2025
Event 5/31/2025
ARK Investment Management LLC 13G/A Amendment 7
5.3% 5/14/2025
Event 3/31/2025
ARK Investment Management LLC 13G/A Amendment 6 7.2% 2/14/2025
Event 12/31/2024
Nikko Asset Management Americas, Inc. 13G/A Amendment 1 4.9% 2/13/2025
Event 12/31/2024
Sumitomo Mitsui Trust Group, Inc. 13G/A Amendment 1
4.8% 2/4/2025
Event 12/31/2024
ARK Investment Management LLC 13G/A Amendment 5 9.7% 1/10/2025
Event 9/30/2024
Rothberg Jonathan M 13D/A Amendment 3
100.0% 12/31/2024
Event 12/27/2024

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 10 114 k $122 k
2026 Q2 149 52.9 M $46.8 M
2026 Q1 166 63.1 M $49.0 M
2025 Q4 149 67.5 M $74.3 M
2025 Q3 140 64.7 M $91.7 M
2025 Q2 148 64.8 M $127 M
2025 Q1 150 57.8 M $69.3 M
2024 Q4 135 53.7 M $145 M
2024 Q3 114 52.1 M $45.9 M
2024 Q2 108 53.8 M $56.3 M
2024 Q1 105 53.4 M $105 M
2023 Q4 101 57.0 M $114 M
2023 Q3 104 54.5 M $90.5 M
2023 Q2 94 43.8 M $78.5 M
2023 Q1 105 43.5 M $76.5 M
2022 Q4 117 52.4 M $95.8 M
2022 Q3 113 47.7 M $131 M
2022 Q2 111 48.6 M $140 M
2022 Q1 107 46.0 M $216 M
2021 Q4 108 47.2 M $371 M
2021 Q3 87 44.6 M $372 M
2021 Q2 86 44.4 M $535 M