How many institutions held QTRX - Quanterix Corp - Common Stock, $0.001 par value per share in Q2 2021?

156 institutional investors reported QTRX - Quanterix Corp - Common Stock, $0.001 par value per share for Q2 2021. Use the holders table for investor-level position and value details.

Quanterix Corp - Common Stock, $0.001 par value per share (QTRX)

Q: What does CUSIP 74766Q101 represent in this 13F holders report?

CUSIP 74766Q101 is the security identifier for QTRX - Quanterix Corp - Common Stock, $0.001 par value per share used to aggregate holder disclosures.

CUSIP: 74766Q101

Q2 2021 13F Holders as of 30 Jun 2021

Security type / class: Equity / Common Stock, $0.001 par value per share
Total 13F shares: 29,988,923
Total 13F value: $1,759,555,578
Share change: +2,010,823
Put/Call ratio: 61%
SEC-reported price per share: $58.66
Number of holders: 156
Value change: +$118,333,332
Number of buys: 97
Number of sells: 69
Shares outstanding: 47,133,168

Security key

74766Q101

Report period

Q2 2021

Institutions

156

Top holders

QTRX full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2021 Previous quarter: Q1 2021 Quanterix Corp SEC filings Quanterix Corp company facts Quanterix Corp 13D/G history

Broader feeds

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

Reporting periods

Holder history for CUSIP 74766Q101

Newer quarter: Q3 2021 Previous quarter: Q1 2021

Recent filing periods:

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

Ownership snapshot

Top reported holders of QTRX - Quanterix Corp - Common Stock, $0.001 par value 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

GILDER GAGNON HOWE & CO LLC

Disclosed value leader

GILDER GAGNON HOWE & CO LLC

Comparable rows

15/15

Latest evidence

31 Mar 2021

13F Lead comparable stake: 6.2% Showing 1-6 of 15 holder rows.

Quick read

GILDER GAGNON HOWE & CO LLC leads the comparable SEC ownership view at 6.2%.

15 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 GILDER GAGNON HOWE & CO LLC's linked filing trail.

Comparable ownership Top 5

GILDER GAGNON HOWE & CO LLC 6.2%

PRICE T ROWE ASSOCIATES INC /MD/ 4.5%

BlackRock Finance, Inc. 4.1%

VANGUARD GROUP INC 3.3%

MACQUARIE GROUP LTD 3.3%

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
GILDER GAGNON HOWE & CO LLC	13F Company 13F	6.2%	$171,213,000 2,928,220 shares	—	31 Mar 2021
PRICE T ROWE ASSOCIATES INC /MD/	13F Company 13F	4.5%	$122,966,000 2,103,054 shares	—	31 Mar 2021
BlackRock Finance, Inc.	13F Company 13F	4.1%	$111,928,000 1,914,302 shares	—	31 Mar 2021
VANGUARD GROUP INC	13F Company 13F	3.3%	$90,894,000 1,554,545 shares	—	31 Mar 2021
MACQUARIE GROUP LTD	13F Company 13F	3.3%	$90,170,000 1,542,158 shares	—	31 Mar 2021
LORD, ABBETT & CO. LLC	13F Company 13F	2.8%	$76,014,000 1,300,057 shares	—	31 Mar 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 Q2 2021

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

Institutions

156

29,988,923

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 Q2 2021 vs Q1 2021 Across Filers

Q1 2021 holders

158

Q2 2021 holders

156

Holder diff

-2

Investor	Q1 2021 Shares	Q2 2021 Shares	Share Diff	Share Chg %	Q1 2021 value	Q2 2021 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend