Quanterix Ownership | Who Owns Quanterix?

Overview Forecast RevenueFinancials Chart Transcripts

Quanterix Ownership Summary

Quanterix is owned by 89.38% institutional investors, 6.55% insiders, and 4.07% retail investors. Portolan capital management is the largest institutional shareholder, holding 9.34% of QTRX shares. CT (Lux) American Smaller Com 9U USD is the top mutual fund, with 4.08% of its assets in Quanterix shares.

QTRX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Quanterix	89.38%	6.55%	4.07%
Sector	Healthcare Stocks	488.30%	11.08%	-399.38%
Industry	Medical Device Stocks	52.08%	10.61%	37.30%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Portolan capital management	3.63M	9.34%	$24.16M
Ameriprise financial	3.21M	8.34%	$34.08M
Blackrock	3.14M	8.23%	$41.45M
Blackrock funding, inc. /de	2.92M	7.52%	$19.45M
Alliancebernstein	2.44M	6.35%	$25.94M
Vanguard group	2.22M	5.77%	$23.57M
Invenomic capital management lp	1.14M	2.94%	$7.61M
William blair investment management	1.13M	2.90%	$7.50M
Easterly investment partners	1.08M	2.79%	$7.21M
Blue water life science advisors, lp	957.75K	2.46%	$6.37M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Blue water life science advisors, lp	957.75K	5.04%	$6.37M
Portolan capital management	3.63M	1.51%	$24.16M
Trium capital llp	688.60K	1.46%	$3.74M
Ashford capital management	771.30K	1.38%	$10.19M
Tikvah management	571.62K	1.22%	$3.80M
Easterly investment partners	1.08M	0.52%	$7.21M
Kent lake capital	75.00K	0.45%	$990.75K
Invenomic capital management lp	1.14M	0.43%	$7.61M
Parkman healthcare partners	515.99K	0.39%	$3.43M
Empire financial management company	123.98K	0.24%	$824.47K

Top Buyers

Holder	Shares	% Assets	Change
Ameriprise financial	3.21M	0.01%	1.69M
Ubs group	934.55K	0.00%	913.39K
Balyasny asset management	767.80K	0.01%	723.29K
Portolan capital management	3.63M	1.51%	670.23K
Blue water life science advisors, lp	957.75K	5.04%	585.57K

Top Sellers

Holder	Shares	% Assets	Change
Millennium management	55.71K	0.00%	-2.13M
Lord, abbett	-	-	-1.76M
Pier capital	-	-	-848.35K
Alliancebernstein	2.44M	0.01%	-825.80K
Eventide asset management	-	-	-615.00K

New Positions

Holder	Shares	% Assets	Change	Value
Parkman healthcare partners	515.99K	0.39%	515.99K	$3.43M
Marshall wace, llp	444.19K	0.00%	444.19K	$2.95M
Cubist systematic strategies	287.23K	0.01%	287.23K	$1.87M
Susquehanna portfolio strategies	158.53K	0.02%	158.53K	$1.05M
Two sigma investments, lp	56.96K	0.00%	56.96K	$605.51K

Sold Out

Holder	Change
Manchester capital management	-23.00
Innealta capital	-26.00
Allworth financial lp	-27.00
Ronald blue trust	-31.00
National bank of canada /fi/	-33.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	135	-10.60%	34,762,673	-0.84%	89	1.09%	70	-23.91%	41	17.14%
Mar 31, 2025	5	-96.82%	897,525	-97.43%	2	0.03%	5	-93.98%	-	-100.00%
Dec 31, 2024	156	3.31%	34,445,404	3.64%	89	1.20%	83	20.29%	43	-17.31%
Sep 30, 2024	149	-4.49%	33,225,425	2.54%	86	1.20%	67	-14.10%	52	8.33%
Jun 30, 2024	155	-6.63%	32,401,996	0.36%	84	1.17%	78	-1.27%	47	-16.07%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
CT (Lux) American Smaller Com 9U USD	1.89M	4.08%	-11.46K
Strategic Advisers U.S. Total Stock	1.89M	4.07%	67.99K
Strategic Advisers U.S. Total Stock{mg}	1.45M	3.79%	91.44K
Strategic Advisers Small-Mid Cap	1.30M	3.39%	283.56K
Vanguard US Total Market Shares ETF	1.15M	2.96%	-
Vanguard Total Stock Mkt Idx Inv	1.25M	2.69%	102.12K
CT American Smaller Coms(US) InstAccGBP	1.23M	2.65%	8.22K
AB Small Cap Growth A	1.26M	2.53%	-30.56K
iShares Russell 2000 ETF	1.01M	2.18%	-
Eventide Healthcare & Life Sciences I	615.00K	1.59%	615.00K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Sep 12, 2025	Sriram Vandana	Chief Financial Officer	Buy	$19.88K
Jun 13, 2025	WALT DAVID R	-	Buy	$760.80K
Jun 12, 2025	WALT DAVID R	-	Buy	$224.17K
Jun 09, 2025	Toloue Masoud	President & CEO	Buy	$248.72K
Jun 06, 2025	WALT DAVID R	-	Buy	$716.58K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	-
2025 Q3	1	-
2025 Q2	6	-
2025 Q1	-	-
2024 Q4	-	-

QTRX Ownership FAQ

Who Owns Quanterix?

Quanterix shareholders are primarily institutional investors at 89.38%, followed by 6.55% insiders and 4.07% retail investors. The average institutional ownership in Quanterix's industry, Medical Device Stocks, is 52.08%, which Quanterix exceeds.

Who owns the most shares of Quanterix?

Quanterix’s largest shareholders are Portolan capital management (3.63M shares, 9.34%), Ameriprise financial (3.21M shares, 8.34%), and Blackrock (3.14M shares, 8.23%). Together, they hold 25.91% of Quanterix’s total shares outstanding.

Does Blackrock own Quanterix?

Yes, BlackRock owns 8.23% of Quanterix, totaling 3.14M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 41.45M$. In the last quarter, BlackRock increased its holdings by 14.95K shares, a 0.48% change.

Who is Quanterix’s biggest shareholder by percentage of total assets invested?

Blue water life science advisors, lp is Quanterix’s biggest shareholder by percentage of total assets invested, with 5.04% of its assets in 957.75K Quanterix shares, valued at 6.37M$.

Who is the top mutual fund holder of Quanterix shares?

CT (Lux) American Smaller Com 9U USD is the top mutual fund holder of Quanterix shares, with 4.08% of its total shares outstanding invested in 1.89M Quanterix shares.

Try Tickergate Pro Free

Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)

Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis

Discover trending investment themes
Find your next best investment
Research stocks using tools