How many institutions held QTRX - Quanterix Corp - Common Stock, $0.001 par value per share in Q1 2026?

126 institutional investors reported QTRX - Quanterix Corp - Common Stock, $0.001 par value per share for Q1 2026. 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

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common Stock, $0.001 par value per share
Total 13F shares: 36,401,474
Total 13F value: $128,129,720
Share change: +1,461,621
SEC-reported price per share: $3.52
Number of holders: 126
Value change: +$1,995,957
Number of buys: 66
Number of sells: 57
Shares outstanding: 47,246,468

Security key

74766Q101

Report period

Q1 2026

Institutions

126

Top holders

QTRX full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 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 2026

Recent filing periods:

Q3 2026

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

BlackRock, Inc.

Disclosed value leader

AMERIPRISE FINANCIAL INC

Comparable rows

4/15

Latest evidence

02 Jan 2026

13F 13D/G 3/4/5 Lead comparable stake: 7.3% 11 rows are not safely comparable across share classes. 13D/G row: BlackRock, Inc. Showing 1-6 of 15 holder rows.

Quick read

BlackRock, Inc. leads the comparable SEC ownership view at 7.3%.

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 BlackRock, Inc.'s linked filing trail.

Comparable ownership Top 4

BlackRock, Inc. 7.3%

Telegraph Hill Partners III, L.P. 5.4%

Kent Lake PR LLC 4.5%

ALLIANCEBERNSTEIN L.P. 0.1%

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
BlackRock, Inc.	13F 13D/G Company 13F 13D/G	7.3% Reported 13D/G · 30 Jun 2025	$21,470,788 3,375,910 shares	—	31 Dec 2025
Telegraph Hill Partners III, L.P.	13D/G 13D/G	5.4% Reported 13D/G · 30 Sep 2025	$12,523,240 2,504,648 shares	$0	30 Sep 2025
Kent Lake PR LLC	13D/G 13D/G	4.5% Reported 13D/G · 11 Jul 2025	$13,894,548 2,089,500 shares	-$3,694,480	11 Jul 2025
ALLIANCEBERNSTEIN L.P.	13F 13D/G Company 13F 13D/G	0.1% Reported 13D/G · 31 Mar 2025	$282,893 44,480 shares	—	31 Dec 2025
AMERIPRISE FINANCIAL INC	13F Company 13F	— denominator unverified	$31,775,037 4,996,073 shares	—	31 Dec 2025
Portolan Capital Management, LLC	13F Company 13F	— denominator unverified	$28,782,517 4,525,553 shares	—	31 Dec 2025

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

126

36,401,474

Rows available

126

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

126

Q1 2026 holders

126

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