Company · Ownership research

Quanterix Corp QTRX

CIK 0001503274 · CUSIP 74766Q101

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 74766Q101 (QTRX), not CUSIP 74766Q951 (QTRX), CUSIP 74766Q901 (QTRX), and does not merge CUSIPs.

This page lists the top 20 of 152 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$24.19M 3,715,238 shares	0.01%	+509.31K(+15.90%)Added	SEC filing ↗ May 14, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$19.99M 3,070,115 shares	0.00%	-94.11K(-3.00%)Reduced	SEC filing ↗ May 2, 2025	▾
03	Portolan Capital Management, LLC CIK 1350290 · View history	$19.29M 2,963,397 shares	1.47%	+375.57K(+14.50%)Added	SEC filing ↗ May 15, 2025	▾
04	Kent Lake PR LLC CIK 2037231 · View history	$19.04M 2,924,903 shares	8.79%	+2.02M(+225.00%)Added	SEC filing ↗ May 15, 2025	▾
05	VANGUARD GROUP INC CIK 102909 · View history	$16.44M 2,525,679 shares	0.00%	+308.45K(+13.90%)Added	SEC filing ↗ May 9, 2025	▾
06	EASTERLY INVESTMENT PARTNERS LLC CIK 1766150 · View history	$8.63M 1,325,620 shares	0.72%	+370.63K(+38.80%)Added	SEC filing ↗ May 2, 2025	▾
07	UBS Group AG CIK 1610520 · View history	$7.26M 1,114,978 shares	0.00%	+180.43K(+19.30%)Added	SEC filing ↗ May 13, 2025	▾
08	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC CIK 1644956 · View history	$7.20M 1,106,063 shares	0.02%	+43.96K(+4.10%)Added	SEC filing ↗ May 9, 2025	▾
09	Invenomic Capital Management LP CIK 1769456 · View history	$5.87M 902,043 shares	0.30%	+902.04KNew	SEC filing ↗ May 15, 2025	▾
10	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$5.64M 865,870 shares	0.00%	+2.37K(+0.30%)Added	SEC filing ↗ May 13, 2025	▾
11	Pier Capital, LLC CIK 1310051 · View history	$5.52M 848,353 shares	0.93%	+168.67K(+24.80%)Added	SEC filing ↗ May 13, 2025	▾
12	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$5.48M 841,333 shares	0.00%	-52.31K(-5.90%)Reduced	SEC filing ↗ May 13, 2025	▾
13	STATE STREET CORP CIK 93751 · View history	$4.96M 761,308 shares	0.00%	-109.00K(-12.50%)Reduced	SEC filing ↗ May 15, 2025	▾
14	Russell Investments Group, Ltd. CIK 1692234 · View history	$3.95M 606,787 shares	0.00%	+205.31K(+51.10%)Added	SEC filing ↗ May 13, 2025	▾
15	BAILLIE GIFFORD & CO CIK 1088875 · View history	$3.91M 600,812 shares	0.00%	-28.98K(-4.60%)Reduced	SEC filing ↗ May 7, 2025	▾
16	MORGAN STANLEY CIK 895421 · View history	$3.88M 596,049 shares	0.00%	+345.23K(+137.60%)Added	SEC filing ↗ May 15, 2025	▾
17	Tikvah Management LLC CIK 1606477 · View history	$3.72M 571,619 shares	1.27%	0(0.00%)Unchanged	SEC filing ↗ May 13, 2025	▾
18	Trium Capital LLP CIK 1963860 · View history	$3.64M 559,500 shares	1.48%	+559.50KNew	SEC filing ↗ Apr 30, 2025	▾
19	Williams Jones Wealth Management, LLC. CIK 1788587 · View history	$3.34M 513,489 shares	0.04%	+41.98K(+8.90%)Added	SEC filing ↗ May 15, 2025	▾
20	ENVESTNET ASSET MANAGEMENT INC CIK 1407543 · View history	$3.26M 500,398 shares	0.00%	+158.13K(+46.20%)Added	SEC filing ↗ Apr 29, 2025	▾

Showing 20 / 152 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

152

Cancelled or null records excluded

Disclosed shares

35,057,304

Not deduplicated across managers

Disclosed value

$228.29M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Quanterix Corp · Q1 2025

Explore all 152 reporting institutions.

This page includes 20 of 152 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.