QTRX

Quanterix Corp

Laboratory Analytical InstrumentsNasdaqAccelerated filer

Total Trades

53

Buys

12

Sells

38

Largest Trade

N/A

Insiders

14

Institutional Funds

97

Inst. Value

$1M+

Activist Filings

36

Insider Trades

InsiderTitleTypeValueSharesPriceDate
HRUSOVSKY E KEVINChairman and CEOSELL$100K–$500K4K$41.91Jan 5, 2022
Roskey Mark T.SVPSELL$1K–$15K149$41.91Jan 5, 2022
Mattoon DawnSr. VP, DiagnosticsSELL$1K–$15K355$41.91Jan 5, 2022
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Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

Telegraph Hill Partners III, L.P.

SC 13G · Nov 19, 2025

5.4%

2.5M shares

Ameriprise Financial, Inc.

SC 13G/A · Nov 14, 2025

9.1%

4.2M shares

Portolan Capital Management, LLC

SC 13G/A · Aug 13, 2025

9.4%

3.6M shares

BlackRock, Inc.

SC 13G/A · Jul 17, 2025

7.3%

2.8M shares

Kent Lake Partners LP

SC 13D/A · Jul 15, 2025

4.5%

2.1M shares

Ameriprise Financial, Inc.

SC 13G/A · May 15, 2025

9.6%

3.7M shares

Portolan Capital Management, LLC

SC 13G/A · May 15, 2025

7.6%

3.0M shares

AllianceBernstein L.P.

SC 13G/A · May 14, 2025

0.1%

37K shares

Ameriprise Financial, Inc.

SC 13G/A · May 7, 2025

10.7%

4.2M shares

Akoya Biosciences, Inc.

SC 13D/A · Apr 30, 2025

0.0%

0 shares

The Vanguard Group

SC 13G/A · Apr 30, 2025

6.5%

2.5M shares

Integrated Core Strategies (US) LLC

SC 13G/A · Apr 23, 2025

0.0%

0 shares

Kent Lake Partners LP

SC 13D/A · Mar 3, 2025

6.9%

2.6M shares

Ameriprise Financial, Inc.

SC 13G · Feb 14, 2025

8.3%

3.2M shares

Kent Lake Partners LP

SC 13D · Feb 13, 2025

5.9%

2.3M shares

AllianceBernstein L.P.

SC 13G/A · Feb 5, 2025

6.3%

2.4M shares

Akoya Biosciences, Inc.

SC 13D · Jan 17, 2025

6.2%

3.0M shares

AllianceBernstein L.P.

SC 13G · Nov 15, 2024

8.5%

3.3M shares

Portolan Capital Management, LLC

SC 13G/A · Nov 13, 2024

6.6%

2.5M shares

Portolan Capital Management, LLC

SC 13G · Jun 27, 2024

5.0%

1.9M shares

Pura Vida Investments, LLC

SC 13G/A · Feb 14, 2024

2.1%

811K shares

Pura Vida Investments, LLC

SC 13G/A · Feb 14, 2024

5.2%

1.9M shares

0.0%

0 shares

The Vanguard Group - 23-1945930

SC 13G · Feb 13, 2024

5.4%

2.1M shares

Integrated Core Strategies (US) LLC

SC 13G/A · Jan 29, 2024

5.5%

2.1M shares

BlackRock, Inc.

SC 13G/A · Jan 25, 2024

8.4%

3.2M shares

Millennium Management LLC

SC 13G · Sep 29, 2023

5.3%

2.0M shares

Pura Vida Investments, LLC

SC 13G/A · Feb 22, 2023

5.6%

2.1M shares

Macquarie Group Limited

SC 13G/A · Feb 14, 2023

0.0%

0 shares

9.2%

3.4M shares

Gilder, Gagnon, Howe & Co. LLC

SC 13G/A · Feb 14, 2023

2.5%

943K shares

BlackRock, Inc.

SC 13G/A · Jan 31, 2023

7.4%

2.8M shares

Pura Vida Investments, LLC

SC 13G/A · Jan 25, 2023

5.6%

2.1M shares

8.1%

3.0M shares

Gilder, Gagnon, Howe & Co. LLC

SC 13G/A · Feb 14, 2022

7.7%

2.8M shares

Macquarie Group Limited

SC 13G · Feb 11, 2022

8.6%

3.2M shares

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