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QTRX SCHEDULE 13G/A: SEC filing

First Eagle Investment Management, LLC

Filed with the SEC on · accession 0001325447-26-000040

QTRX filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 10, 2026. First Eagle Investment Management, LLC filed an amended Schedule 13G indicating it beneficially owns 2,192,500 shares, or 4.6%, of Quanterix Corp as of September 30, 2026. The stock moved -3.0% by the first close after the filing.

Summary of the filing

First Eagle Investment Management, LLC filed an amended Schedule 13G indicating it beneficially owns 2,192,500 shares, or 4.6%, of Quanterix Corp as of September 30, 2026. The filing is a passive investment disclosure with no intent to influence control of the company.

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Key details

Shares beneficially owned$2.2M
Percent of class beneficially ownedPCT 5
Reporting person / beneficial ownerFirst Eagle Investment Management, LLC
Issuer / subject companyQuanterix Corp
General counselDavid O'Connor

How QTRX stock reacted

Close before

$3.38

Nov 9, 2026

First close after

-2.96%

$3.28

5 trading days

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Since filing

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Frequently asked questions

What did QTRX file with the SEC on Nov 10, 2026?

QTRX filed a SCHEDULE 13G/A (SEC filing). First Eagle Investment Management, LLC filed an amended Schedule 13G indicating it beneficially owns 2,192,500 shares, or 4.6%, of Quanterix Corp as of September 30, 2026. The filing is a passive investment disclosure with no intent to influence control of the company.

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did QTRX stock react to this filing?

QTRX closed at $3.38 before the filing and $3.28 on Nov 10, 2026 (-2.96%).

Other QTRX SEC filings

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