Quanterix (QTRX) Institutional Ownership

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Current Institutional Ownership Percentage: 86.48%
Number of Institutional Buyers (last 12 months): 60
Total Institutional Inflows (last 12 months): $60.70M

Number of Institutional Sellers (last 12 months): 28
Total Institutional Outflows (last 12 months): $26.53M

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QTRX Institutional Buying and Selling by Quarter

Quanterix Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
8/17/2026	Bank of America Corp DE	29,286	$127K	0.0%	N/A	0.062%
8/14/2026	Canada Pension Plan Investment Board	38,100	$165K	0.0%	N/A	0.081%
8/14/2026	The Manufacturers Life Insurance Company	13,788	$60K	0.0%	N/A	0.029%
8/14/2026	Algert Global LLC	55,217	$239K	0.0%	N/A	0.117%
8/12/2026	Ieq Capital LLC	35,507	$153K	0.0%	N/A	0.075%
8/7/2026	BlackRock Inc.	3,635,411	$15.71M	0.0%	N/A	7.717%
8/7/2026	Deutsche Bank AG	36,678	$158K	0.0%	N/A	0.078%
8/6/2026	SCS Capital Management LLC	120,035	$519K	0.0%	N/A	0.255%
8/6/2026	Bank of New York Mellon Corp	131,900	$570K	0.0%	N/A	0.280%
8/6/2026	GSA Capital Partners LLP	410,252	$1.77M	0.1%	N/A	0.871%
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5/19/2026	Bank of America Corp DE	49,552	$174K	0.0%	+16.5%	0.105%
5/18/2026	Empire Financial Management Company LLC	736,068	$2.59M	0.6%	+19.1%	1.562%
5/18/2026	Royal Bank of Canada	232,101	$817K	0.0%	+129.8%	0.493%
5/16/2026	Quantinno Capital Management LP	47,594	$168K	0.0%	-25.4%	0.101%
5/14/2026	Renaissance Technologies LLC	136,207	$479K	0.0%	+1,054.3%	0.289%
5/13/2026	Levin Capital Strategies L.P.	1,464,052	$5.15M	0.4%	N/A	3.108%
5/7/2026	Dimensional Fund Advisors LP	443,118	$1.56M	0.0%	+13.8%	0.942%
2/23/2026	Virtu Financial LLC	20,626	$131K	0.0%	N/A	0.044%
2/19/2026	Invesco Ltd.	113,200	$720K	0.0%	+14.7%	0.242%
2/18/2026	XTX Topco Ltd	74,093	$471K	0.0%	+555.1%	0.159%
2/18/2026	Susquehanna Portfolio Strategies LLC	55,150	$351K	0.0%	-43.5%	0.118%
2/18/2026	Tudor Investment Corp ET AL	169,695	$1.08M	0.0%	N/A	0.363%
2/18/2026	Quadrature Capital Ltd	21,707	$138K	0.0%	N/A	0.046%
2/18/2026	Numerai GP LLC	29,762	$189K	0.0%	-66.2%	0.064%
2/18/2026	Millennium Management LLC	402,631	$2.56M	0.0%	-66.7%	0.862%
2/18/2026	Invenomic Capital Management LP	1,505,208	$9.57M	0.4%	+8.1%	3.222%
2/17/2026	Schonfeld Strategic Advisors LLC	61,722	$393K	0.0%	-54.8%	0.132%
2/17/2026	AQR Capital Management LLC	65,522	$417K	0.0%	-58.5%	0.140%
2/17/2026	Jain Global LLC	12,677	$81K	0.0%	-27.0%	0.027%
2/17/2026	Jump Financial LLC	144,095	$916K	0.0%	+21.8%	0.308%
2/17/2026	Price T Rowe Associates Inc. MD	43,778	$279K	0.0%	-25.5%	0.094%
2/17/2026	Russell Investments Group Ltd.	256,140	$1.63M	0.0%	-41.0%	0.548%
2/17/2026	State of Wisconsin Investment Board	147,824	$940K	0.0%	-24.5%	0.316%
2/17/2026	ExodusPoint Capital Management LP	24,080	$153K	0.0%	N/A	0.052%
2/17/2026	Royal Bank of Canada	101,001	$642K	0.0%	-59.2%	0.216%
2/16/2026	Barclays PLC	120,203	$764K	0.0%	+78.7%	0.257%
2/13/2026	Marshall Wace LLP	155,169	$987K	0.0%	-74.5%	0.332%
2/13/2026	Williams Jones Wealth Management LLC.	638,939	$4.06M	0.0%	-6.9%	1.368%
2/13/2026	Charles Schwab Investment Management Inc.	362,740	$2.31M	0.0%	+9.5%	0.777%
2/13/2026	State Street Corp	893,401	$5.68M	0.0%	+9.0%	1.913%
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2/13/2026	Caitong International Asset Management Co. Ltd	4,224	$27K	0.1%	N/A	0.009%
2/13/2026	Wells Fargo & Company MN	162,686	$1.04M	0.0%	+12.7%	0.348%
2/12/2026	Empire Financial Management Company LLC	617,830	$3.93M	0.9%	+36.6%	1.323%
2/12/2026	Jane Street Group LLC	69,383	$441K	0.0%	-53.7%	0.149%
2/12/2026	HRT Financial LP	13,018	$82K	0.0%	N/A	0.028%
2/12/2026	MetLife Investment Management LLC	15,967	$102K	0.0%	-30.4%	0.034%
2/12/2026	Paragon Associates & Paragon Associates II Joint Venture	25,000	$159K	0.3%	-75.2%	0.054%
2/12/2026	Commonwealth Equity Services LLC	11,238	$71K	0.0%	-35.7%	0.024%
2/12/2026	Renaissance Technologies LLC	11,800	$75K	0.0%	N/A	0.025%
2/12/2026	Dimensional Fund Advisors LP	389,466	$2.48M	0.0%	-44.9%	0.834%
2/12/2026	Ironwood Investment Management LLC	172,330	$1.10M	0.5%	-11.2%	0.369%
2/11/2026	Deutsche Bank AG	29,906	$190K	0.0%	+6.5%	0.064%
2/11/2026	LPL Financial LLC	24,877	$158K	0.0%	N/A	0.053%
2/11/2026	Los Angeles Capital Management LLC	34,978	$222K	0.0%	N/A	0.075%
2/10/2026	Goldman Sachs Group Inc.	248,242	$1.58M	0.0%	-10.7%	0.531%
2/10/2026	AXQ Capital LP	11,009	$70K	0.0%	N/A	0.024%
2/10/2026	Easterly Investment Partners LLC	616,681	$3.92M	0.2%	-50.8%	1.320%
2/9/2026	Geode Capital Management LLC	1,073,967	$6.83M	0.0%	+6.1%	2.299%
2/9/2026	William Blair Investment Management LLC	2,046,449	$13.02M	0.0%	+55.6%	4.381%
2/4/2026	First Eagle Investment Management LLC	531,427	$3.38M	0.0%	N/A	1.138%
1/23/2026	Farther Finance Advisors LLC	4,078	$26K	0.0%	N/A	0.009%
1/22/2026	Trium Capital LLP	817,451	$5.20M	4.0%	+18.7%	1.750%
1/16/2026	Aberdeen Group plc	104,039	$662K	0.0%	-81.6%	0.223%
1/15/2026	Allspring Global Investments Holdings LLC	15,560	$100K	0.0%	+10.3%	0.033%
1/1/2026	JPMorgan Chase & Co.	227,771	$1.24M	0.0%	-12.6%	0.488%
11/17/2025	Williams Jones Wealth Management LLC.	686,464	$3.73M	0.0%	+1.5%	1.470%
11/17/2025	PharVision Advisers LLC	36,144	$196K	0.1%	N/A	0.077%
11/17/2025	Quarry LP	5,548	$30K	0.0%	+277,300.0%	0.012%
11/17/2025	Parkman Healthcare Partners LLC	252,211	$1.37M	0.1%	-51.1%	0.540%
11/17/2025	Numerai GP LLC	88,064	$478K	0.1%	N/A	0.189%
11/17/2025	Millennium Management LLC	1,209,199	$6.57M	0.0%	+9,880.2%	2.589%
11/17/2025	Invenomic Capital Management LP	1,393,005	$7.56M	0.4%	+21.7%	2.982%
11/17/2025	Jain Global LLC	17,377	$94K	0.0%	N/A	0.037%
11/17/2025	Brevan Howard Capital Management LP	23,244	$126K	0.0%	+60.2%	0.050%
11/17/2025	Bank of America Corp DE	88,366	$480K	0.0%	+43.0%	0.189%
11/17/2025	Ameriprise Financial Inc.	4,243,512	$23.04M	0.0%	+0.2%	9.085%
11/14/2025	Schonfeld Strategic Advisors LLC	136,575	$742K	0.0%	-58.1%	0.292%
11/14/2025	Two Sigma Investments LP	250,074	$1.36M	0.0%	+3.0%	0.535%
11/14/2025	Bridgeway Capital Management LLC	43,000	$233K	0.0%	N/A	0.092%
11/14/2025	Portolan Capital Management LLC	4,259,851	$23.13M	1.3%	+17.2%	9.120%
11/13/2025	Ironwood Investment Management LLC	194,074	$1.05M	0.5%	+811.3%	0.415%
11/13/2025	UBS Group AG	373,600	$2.03M	0.0%	-2.9%	0.800%
11/13/2025	BNP Paribas Financial Markets	150,327	$816K	0.0%	+336.9%	0.322%
11/13/2025	Russell Investments Group Ltd.	434,060	$2.36M	0.0%	+2.2%	0.929%
11/13/2025	Paragon Associates & Paragon Associates II Joint Venture	100,671	$547K	1.0%	N/A	0.216%
11/12/2025	Dimensional Fund Advisors LP	707,071	$3.84M	0.0%	-12.0%	1.522%
11/12/2025	William Blair Investment Management LLC	1,315,280	$7.14M	0.0%	+16.6%	2.831%
11/12/2025	Quantbot Technologies LP	8,673	$47K	0.0%	-72.8%	0.019%
11/12/2025	R Squared Ltd	11,771	$64K	0.0%	N/A	0.025%
11/12/2025	Intech Investment Management LLC	19,161	$104K	0.0%	+13.4%	0.041%
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11/7/2025	Vanguard Group Inc.	2,647,515	$14.38M	0.0%	+4.7%	5.697%
11/7/2025	JPMorgan Chase & Co.	227,771	$1.24M	0.0%	-12.6%	0.490%
11/7/2025	Aberdeen Group plc	564,581	$3.07M	0.0%	+34.2%	1.215%
11/6/2025	Rhumbline Advisers	57,057	$310K	0.0%	-5.9%	0.123%
11/5/2025	Envestnet Asset Management Inc.	515,861	$2.80M	0.0%	+122.7%	1.110%
10/31/2025	Vanguard Personalized Indexing Management LLC	13,008	$71K	0.0%	-13.4%	0.028%
10/17/2025	Peddock Capital Advisors LLC	52,105	$283K	0.1%	+196.0%	0.112%
10/16/2025	Trium Capital LLP	688,597	$3.74M	1.5%	+17.4%	1.482%
8/19/2025	State of Wyoming	14,814	$99K	0.0%	+105.3%	0.032%
8/15/2025	BNP Paribas Financial Markets	34,410	$229K	0.0%	-81.6%	0.074%

QTRX Institutional Ownership - Frequently Asked Questions

During the previous two years, 138 institutional investors and hedge funds held shares of Quanterix. The most heavily invested institutionals were Alliancebernstein L.P. ($25.94M), Portolan Capital Management LLC ($23.13M), Ameriprise Financial Inc. ($23.04M), BlackRock Inc. ($15.71M), Kent Lake PR LLC ($15.30M), Vanguard Group Inc. ($14.38M), and William Blair Investment Management LLC ($13.02M).Learn more on Quanterix's institutional investors.

86.48% of Quanterix's stock is owned by institutional investors. Learn more on QTRX's institutional investor holdings.

Of the 115 institutional investors that purchased Quanterix's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: BlackRock Inc. ($3.64M), Ameriprise Financial Inc. ($2.22M), William Blair Investment Management LLC ($2.00M), Levin Capital Strategies L.P. ($1.48M), Millennium Management LLC ($1.32M), Portolan Capital Management LLC ($1.30M), and Invenomic Capital Management LP ($1.26M).

Institutional investors have bought a total of 12,363,468 shares in the last 24 months. This purchase volume represents approximately $60.70M in transactions.

Of the 28 institutional investors that sold Quanterix's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Millennium Management LLC ($806.57K), Easterly Investment Partners LLC ($635.50K), Aberdeen Group plc ($460.54K), Marshall Wace LLP ($453.54K), Dimensional Fund Advisors LP ($414.27K), Schonfeld Strategic Advisors LLC ($263.96K), and Parkman Healthcare Partners LLC ($263.78K).

Institutional investors have sold a total of 4,273,821 shares in the last 24 months. This volume of shares sold represents approximately $26.53M in transactions.

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Institutional ownership data for NASDAQ:QTRX is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/17/2026. New 13F filings are added each quarter as they're published.

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Quanterix (QTRX) Institutional Ownership

QTRX Institutional Buying and Selling by Quarter

Quanterix Major Shareholders & Ownership History

QTRX Institutional Ownership - Frequently Asked Questions

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Quanterix (QTRX) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Quanterix (NASDAQ:QTRX)

QTRX Institutional Buying and Selling by Quarter

Quanterix Major Shareholders & Ownership History

QTRX Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of QTRX shares?

What percentage of Quanterix's stock is owned by institutional investors?

Which institutional investors have been buying Quanterix's stock?

How much institutional buying is happening at Quanterix?

Which of Quanterix's major shareholders have been selling company stock?

How much institutional selling is happening at Quanterix?

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