Quanterix Corp (QTRX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

849,650Shares held by institutions

$2,910,051Value of institutional holdings

87.14%Institutional ownership %

3.95%Shares Changed QoQ

137No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Quanterix Corp (NASDAQ:QTRX) appears in 128 institutional 13F filings for the quarter ending December 2025.

Collectively, these holders controlled 70.9% of Quanterix's outstanding shares in December 2025, down from 78.1% in September 2025.
They decreased total shares held in Quanterix by -1.82% from last quarter, and the number of investors in QTRX decreased 16.34% annually.
Among the 128 funds, 58 bought more Quanterix shares, 43 sold down, and 27 held their ground.
Combined, these investors held 32.65Mn shares in QTRX for December 2025, down by 605.42K shares quarter on quarter, and down 2.86Mn shares year over year.
Ameriprise Financial Inc leads ownership in QTRX with 5.0Mn shares as of December 31, 2025, equal to 10.85% of outstanding shares.
The biggest buyers of Quanterix for the quarter ending December 2025 included Ameriprise Financial Inc (752.56K), WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (731.17K), First Eagle Investment Management, LLC (531.43K), Portolan Capital Management, LLC (265.7K), BlackRock, Inc. (262.93K).
The biggest sellers of Quanterix for the quarter ending December 2025 included MILLENNIUM MANAGEMENT LLC (806.57K), EASTERLY INVESTMENT PARTNERS LLC (635.5K), Aberdeen Group plc (460.54K), MARSHALL WACE, LLP (453.54K), Jpmorgan Chase & Co (341.52K).
Per Business Quant, the top 10 investors in QTRX for the quarter ending December 2025 include Ameriprise Financial Inc (5.0Mn), Portolan Capital Management, LLC (4.53Mn), BlackRock, Inc. (3.38Mn), VANGUARD GROUP INC (2.68Mn), WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (2.05Mn), Invenomic Capital Management LP (1.51Mn), GEODE CAPITAL MANAGEMENT, LLC (1.07Mn), State Street Corp (893.4K), Morgan Stanley (823.0K), Trium Capital LLP (817.45K).

128 Institutional Holders

849,650 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	262,930	8.45%	$0.00
Ameriprise Financial Inc	31 Dec, 2025	752,561	17.73%	$0.00
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	31 Dec, 2025	731,169	55.59%	$0.00
Barclays Plc	31 Dec, 2025	-93,314	-43.70%	$0.00
Portolan Capital Management, LLC	31 Dec, 2025	265,702	6.24%	$0.00
Invenomic Capital Management LP	31 Dec, 2025	112,203	8.05%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	563	22.86%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	30,318	1.15%	$0.00
Trium Capital LLP	31 Dec, 2025	128,854	18.71%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	62,077	6.13%	$0.00
Williams Jones Wealth Management, LLC.	31 Dec, 2025	-47,525	-6.92%	$0.00
State Street Corp	31 Dec, 2025	73,867	9.01%	$0.00
Empire Financial Management Company, LLC	31 Dec, 2025	165,400	36.56%	$0.00
Morgan Stanley	31 Dec, 2025	16,735	2.08%	$0.00
EASTERLY INVESTMENT PARTNERS LLC	31 Dec, 2025	-635,503	-50.75%	$0.00
First Eagle Investment Management, LLC	31 Dec, 2025	531,427	0.00%	$0.00
Tikvah Management LLC	31 Dec, 2025	0	0.00%	$0.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	-806,568	-66.70%	$0.00
UBS Group AG	31 Dec, 2025	-62,101	-16.62%	$0.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	-317,605	-44.92%	$0.00

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