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 Q3 2021?

70 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 Q3 2021. Use the holders table for investor-level position and value details.

CUSIP: 74765K105

Q3 2021 13F Holders as of 30 Sep 2021

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: 44,603,838
Total 13F value: $372,106,029
Share change: +231,113
Put/Call ratio: 62%
SEC-reported price per share: $8.34
Number of holders: 70
Value change: -$32,106,463
Number of buys: 42
Number of sells: 34
Shares outstanding: 19,937,500

Security key

74765K105

Report period

Q3 2021

Institutions

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

2012 JMR Trust Common LLC

Disclosed value leader

GLENVIEW CAPITAL MANAGEME...

Comparable rows

0/15

Latest evidence

30 Jun 2021

3/4/5 13F Highest disclosed value: $88,114,000 15 rows are not safely comparable across share classes. Showing 1-6 of 15 holder rows.

Quick read

GLENVIEW CAPITAL MANAGEMENT, LLC has the largest disclosed position value at $88.11M.

0 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 GLENVIEW CAPITAL MANAGEMENT, LLC's linked filing trail.

Disclosed position value Top 5

2012 JMR Trust Common LLC $22.09M

GLENVIEW CAPITAL MANAGEMENT, LLC $88.11M

Foresite Capital Management IV, LLC $54.72M

ARK Investment Management LLC $49.63M

Alyeska Investment Group, L.P. $34.35M

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

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

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
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
GLENVIEW CAPITAL MANAGEMENT, LLC	13F Company 13F	— denominator unverified	$88,114,000 7,187,091 shares	—	30 Jun 2021
Foresite Capital Management IV, LLC	13F Company 13F	— denominator unverified	$54,724,000 4,463,619 shares	—	30 Jun 2021
ARK Investment Management LLC	13F Company 13F	— denominator unverified	$49,632,000 4,048,303 shares	—	30 Jun 2021
Alyeska Investment Group, L.P.	13F Company 13F	— denominator unverified	$34,350,000 3,125,374 shares	—	30 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 Q3 2021

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

Institutions

44,603,838

Rows available

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 Q3 2021 vs Q2 2021 Across Filers

Q2 2021 holders

Q3 2021 holders

Holder diff

Investor	Q2 2021 Shares	Q3 2021 Shares	Share Diff	Share Chg %	Q2 2021 value	Q3 2021 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend