Quantum-Si Inc - Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share (QSI)

Q: What does CUSIP 74765K105 represent in this 13F holders report?

CUSIP 74765K105 is the security identifier for QSI - Quantum-Si Inc - Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share used to aggregate holder disclosures.

Q: How many institutions held QSI - Quantum-Si Inc - Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share in Q1 2026?

156 institutional investors reported QSI - Quantum-Si Inc - Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share for Q1 2026. Use the holders table for investor-level position and value details.

CUSIP: 74765K105

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share
Total 13F shares: 63,116,141
Total 13F value: $48,952,321
Share change: -4,551,572
Put/Call ratio: 65%
SEC-reported price per share: $0.77
Number of holders: 156
Value change: -$4,160,683
Number of buys: 78
Number of sells: 57
Shares outstanding: 19,937,500

Security key

74765K105

Report period

Q1 2026

Institutions

156

Top holders

QSI full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 Quantum-Si Inc SEC filings Quantum-Si Inc company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 74765K105

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of QSI - Quantum-Si Inc - Class A common stock, par value $0.0001 per share, Class B common stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Amova Asset Management Am...

Disclosed value leader

2012 JMR Trust Common LLC

Comparable rows

4/15

Latest evidence

31 Dec 2025

13D/G 13F 3/4/5 Lead comparable stake: 4.8% 11 rows are not safely comparable across share classes. 13D/G row: Amova Asset Management Americas, Inc. Showing 1-6 of 15 holder rows.

Quick read

Amova Asset Management Americas, Inc. leads the comparable SEC ownership view at 4.8%.

4 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Amova Asset Management Americas, Inc.'s linked filing trail.

Comparable ownership Top 4

Amova Asset Management Americas, ... 4.8%

Sumitomo Mitsui Trust Group, Inc. 4.8%

VANGUARD GROUP INC 4.8%

ARK Investment Management LLC 4.8%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Amova Asset Management Americas, Inc.	13D/G 13F Nikko Asset Management Americas, Inc. · Company 13D/G 13F	4.8% Reported 13D/G · 31 Dec 2024	$7,217,902 5,965,208 shares	$0	31 Dec 2024
Sumitomo Mitsui Trust Group, Inc.	13D/G 13F Company 13D/G 13F	4.8% Reported 13D/G · 31 Dec 2024	$7,217,902 5,965,208 shares	$0	31 Dec 2024
VANGUARD GROUP INC	13D/G 13F The Vanguard Group · Company 13D/G 13F	4.8% Reported 13D/G · 30 Sep 2025	$12,287,455 8,714,507 shares	+$63,233	30 Sep 2025
ARK Investment Management LLC	13D/G 13F Company 13D/G 13F	4.8% Reported 13D/G · 31 May 2025	$11,792,099 7,809,337 shares	-$1,365,288	31 May 2025
2012 JMR Trust Common LLC	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$22,089,791 12,480,108 shares	—	10 Jun 2021
4C Holdings I, LLC	3/4/5 10%+ Owner 3/4/5	— denominator unverified	— 17,943,750 shares	—	10 Jun 2021

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

156

63,116,141

Rows available

156

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

156

Q1 2026 holders

156

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend