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

CUSIP 74765K105 is the security identifier for QSI - Quantum-Si Inc - Common Stock used to aggregate holder disclosures.

How many institutions held QSI - Quantum-Si Inc - Common Stock in Q3 2021?

70 institutional investors reported QSI - Quantum-Si Inc - Common Stock for Q3 2021. Use the holders table for investor-level position and value details.

Quantum-Si Inc - Common Stock (QSI)

CUSIP: 74765K105

Q3 2021 13F Holders as of 30 Sep 2021

Type / Class: Equity / Common Stock
Shares outstanding: 182,694,067
Total 13F shares: 44,603,838
Share change: +231,113
Total reported value: $372,106,029
Put/Call ratio: 62%
Price per share: $8.34
Number of holders: 70
Value change: -$32,106,463
Number of buys: 42
Number of sells: 34

Quarterly Holders Quick Answers

What is CUSIP 74765K105?
CUSIP 74765K105 identifies QSI - Quantum-Si Inc - Common Stock in SEC institutional holdings data.

Need full ownership history?
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Related Filing Research

Latest 13F filings for newly reported positions.
Latest Schedule 13D/13G reports for ownership changes outside 13F cadence.
Latest 10-Q/10-K reports for financial context tied to this issuer.
Recent insider transactions for executive and insider activity.
SEC investors directory and top value investors for manager drilldown.
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Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q4 2021
Previous quarter: Q2 2021

Recent filing periods for CUSIP 74765K105:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of QSI - Quantum-Si Inc - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
GLENVIEW CAPITAL MANAGEMENT, LLC	13F	Company	3.9%	7,187,091	$88,114,000	—	30 Jun 2021	13F
Foresite Capital Management IV, LLC	13F	Company	2.4%	4,463,619	$54,724,000	—	30 Jun 2021	13F
ARK Investment Management LLC	13F	Company	2.2%	4,048,303	$49,632,000	—	30 Jun 2021	13F
Alyeska Investment Group, L.P.	13F	Company	1.7%	3,125,374	$34,350,000	—	30 Jun 2021	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	1.5%	2,750,000	$33,248,000	—	30 Jun 2021	13F
Foresite Capital Management V, LLC	13F	Company	1.3%	2,342,061	$28,714,000	—	30 Jun 2021	13F
Capital International Investors	13F	Company	1.4%	2,500,000	$26,972,000	—	30 Jun 2021	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	1.2%	2,194,600	$25,618,000	—	30 Jun 2021	13F
2012 JMR Trust Common LLC	3/4/5	10%+ Owner	— class O/S missing	12,480,108	$22,089,791	—	10 Jun 2021	3/4/5
FARALLON CAPITAL MANAGEMENT LLC	13F	Company	0.96%	1,750,000	$21,455,000	—	30 Jun 2021	13F
Redmile Group, LLC	13F	Company	0.93%	1,700,000	$20,842,000	—	30 Jun 2021	13F
DEERFIELD MANAGEMENT COMPANY, L.P.	13F	Company	— mixed-class rows	1,733,333 mixed-class rows	$18,417,000	—	30 Jun 2021	13F
Amova Asset Management Americas, Inc.	13F	Company	0.7%	1,283,001	$16,012,000	—	30 Jun 2021	13F
Sumitomo Mitsui Trust Group, Inc.	13F	Company	0.69%	1,260,628	$15,455,000	—	30 Jun 2021	13F
Monashee Investment Management LLC	13F	Company	0.68%	1,250,000	$15,325,000	—	30 Jun 2021	13F
James B. Tananbaum	3/4/5	Director	— class O/S missing	8,424,317	$14,911,041	—	10 Jun 2021	3/4/5
CVI Holdings, LLC	13F	Company	0.66%	1,200,000	$14,712,000	—	30 Jun 2021	13F
CITADEL ADVISORS LLC	13F	Company	0.47%	867,703	$10,471,000	—	30 Jun 2021	13F
Blackstone Inc.	13F	Company	0.47%	850,000	$10,421,000	—	30 Jun 2021	13F
Fosun International Ltd	13F	Company	0.41%	743,936	$9,121,000	—	30 Jun 2021	13F
TOMS Capital Investment Management LP	13F	Company	0.27%	500,000	$6,130,000	—	30 Jun 2021	13F
Rubric Capital Management LP	13F	Company	0.27%	493,013	$6,044,000	—	30 Jun 2021	13F
Clearline Capital LP	13F	Company	— mixed-class rows	469,633 mixed-class rows	$5,082,000	—	30 Jun 2021	13F
HRT FINANCIAL LP	13F	Company	— mixed-class rows	402,633 mixed-class rows	$4,692,000	—	30 Jun 2021	13F
Prosight Management, LP	13F	Company	0.12%	227,391	$2,788,000	—	30 Jun 2021	13F
Sculptor Capital LP	13F	Company	0.12%	213,000	$2,600,000	—	30 Jun 2021	13F
Ikarian Capital, LLC	13F	Company	0.09%	160,000	$1,962,000	—	30 Jun 2021	13F
Westchester Capital Management, LLC	13F	Company	— mixed-class rows	201,242 mixed-class rows	$1,732,000	—	30 Jun 2021	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.07%	135,503	$1,661,000	—	30 Jun 2021	13F
Ionic Capital Management LLC	13F	Company	— mixed-class rows	361,901 mixed-class rows	$1,485,000	—	30 Jun 2021	13F
TD ASSET MANAGEMENT INC	13F	Company	0.08%	150,662	$1,419,000	—	30 Jun 2021	13F
LINDEN ADVISORS LP	13F	Company	— class O/S missing	328,120	$1,242,000	—	30 Jun 2021	13F
Castle Creek Arbitrage, LLC	13F	Company	— mixed-class rows	122,334 mixed-class rows	$934,000	—	30 Jun 2021	13F
Affinity Asset Advisors, LLC	13F	Company	0.04%	75,000	$920,000	—	30 Jun 2021	13F
MORGAN STANLEY	13F	Company	— mixed-class rows	64,155 mixed-class rows	$782,000	—	30 Jun 2021	13F
MARSHALL WACE, LLP	13F	Company	0.03%	61,655	$756,000	—	30 Jun 2021	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.03%	61,418	$752,000	—	30 Jun 2021	13F
Magnetar Financial LLC	13F	Company	— class O/S missing	169,196	$645,000	—	30 Jun 2021	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.03%	51,819	$636,000	—	30 Jun 2021	13F
JANE STREET GROUP, LLC	13F	Company	— mixed-class rows	60,845 mixed-class rows	$599,000	—	30 Jun 2021	13F
Raymond James Financial Services Advisors, Inc.	13F	Company	0.02%	30,544	$374,000	—	30 Jun 2021	13F
BOOTHBAY FUND MANAGEMENT, LLC	13F	Company	0.02%	29,120	$357,000	—	30 Jun 2021	13F
GROUP ONE TRADING LLC	13F	Company	0.02%	27,500	$337,000	—	30 Jun 2021	13F
SIMPLEX TRADING, LLC	13F	Company	0.01%	27,290	$334,000	—	30 Jun 2021	13F
Guidance Point Advisors, LLC	13F	Company	0.01%	25,742	$315,000	—	30 Jun 2021	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.01%	19,494	$239,000	—	30 Jun 2021	13F
MSD Partners, L.P.	13F	Company	— class O/S missing	59,800	$225,000	—	30 Jun 2021	13F
APOGEM CAPITAL LLC	13F	Company	0.01%	17,252	$212,000	—	30 Jun 2021	13F
Private Advisor Group, LLC	13F	Company	0.01%	16,375	$201,000	—	30 Jun 2021	13F
BLUEFIN CAPITAL MANAGEMENT, LLC	13F	Company	0.01%	15,000	$184,000	—	30 Jun 2021	13F

Institutional Holders of Quantum-Si Inc - Common Stock (QSI) as of Q3 2021

As of 30 Sep 2021, Quantum-Si Inc - Common Stock (QSI) was held by 70 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 44,603,838 shares. The largest 10 holders included ARK Investment Management LLC, GLENVIEW CAPITAL MANAGEMENT, LLC, Foresite Capital Management IV, LLC, Capital International Investors, Foresite Capital Management V, LLC, PRICE T ROWE ASSOCIATES INC /MD/, VANGUARD GROUP INC, DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C), Sumitomo Mitsui Trust Holdings, Inc., and Nikko Asset Management Americas, Inc.. This page lists 70 institutional shareholders reporting positions in this security for the Q3 2021 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

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 Diff $	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.