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Quanterix Corp·4

Mar 16, 4:10 PM ET

Sriram Vandana 4

4 · Quanterix Corp · Filed Mar 16, 2026

Research Summary

AI-generated summary of this filing

Updated

Quanterix CFO Sriram Vandana Converts RSUs; 645 Shares Withheld

What Happened
Sriram Vandana, Chief Financial Officer of Quanterix Corp (QTRX), had restricted stock units (RSUs) convert into common stock on March 15, 2026. A total of 1,833 shares converted (263 + 514 + 1,056). To satisfy tax withholding, 645 shares were surrendered/treated as disposed at $4.72 per share, generating $3,044 to cover tax obligations. The remaining net shares issued to Vandana equal approximately 1,188 shares (1,833 converted minus 645 withheld). This was a compensation vesting/conversion event rather than an open-market purchase or a discretionary sale.

Key Details

  • Transaction date: March 15, 2026; Form 4 filed March 16, 2026 (timely).
  • Conversions (code M): 263, 514, and 1,056 RSUs converted into common stock (total 1,833).
  • Tax withholding (code F): 93, 181, and 371 shares withheld at $4.72/share (total 645 shares; $3,044).
  • Net shares received by insider (approx.): 1,188 shares.
  • Footnotes: F1–F4 indicate these were RSUs converting 1-for-1; grants originated Aug 21, 2023 (12,624 RSUs), Feb 2, 2024 (24,675 RSUs), and Feb 4, 2025 (50,712 RSUs) with standard vesting schedules noted.
  • Shares owned after transaction: not specified in the provided filing.
  • Codes explained: M = exercise/conversion of derivative (here, RSU conversion); F = shares withheld/sold to satisfy tax withholding.

Context

  • This is a routine, compensation-related vesting/settlement (net-share settlement for taxes), not an open-market sale or purchase. Such transactions are common when RSUs vest and typically do not by themselves indicate the insider’s market view.

Insider Transaction Report

Form 4
Period: 2026-03-15
Quanterix CorpQTRX
Sriram Vandana
Chief Financial Officer
Transactions
  • Exercise/Conversion

    Common Stock

    [F1]
    2026-03-15+263→ 26,503 total
  • Tax Payment

    Common Stock

    2026-03-15$4.72/sh−93$439→ 26,410 total
  • Exercise/Conversion

    Common Stock

    [F1]
    2026-03-15+514→ 26,924 total
  • Tax Payment

    Common Stock

    2026-03-15$4.72/sh−181$854→ 26,743 total
  • Exercise/Conversion

    Common Stock

    [F1]
    2026-03-15+1,056→ 27,799 total
  • Tax Payment

    Common Stock

    2026-03-15$4.72/sh−371$1,751→ 27,428 total
  • Exercise/Conversion

    Restricted Stock Unit

    [F2]
    2026-03-15−263→ 4,471 total
    Exercise: $0.00→ Common Stock (263 underlying)
  • Exercise/Conversion

    Restricted Stock Unit

    [F3]
    2026-03-15−514→ 11,825 total
    Exercise: $0.00→ Common Stock (514 underlying)
  • Exercise/Conversion

    Restricted Stock Unit

    [F4]
    2026-03-15−1,056→ 36,978 total
    Exercise: $0.00→ Common Stock (1,056 underlying)
Footnotes (4)
  • [F1]Restricted stock units convert into common stock on a one-for-one basis.
  • [F2]On August 21, 2023, the reporting person was granted 12,624 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in equal monthly installments of 6.25% on the monthly anniversary of the grant date thereafter.
  • [F3]On February 2, 2024, the reporting person was granted 24,675 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in equal monthly installments of 6.25% on the monthly anniversary of the grant date thereafter.
  • [F4]On February 4, 2025, the reporting person was granted 50,712 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in equal monthly installments of 6.25% on the monthly anniversary of the grant date thereafter.
Signature
/s/ Bonnie McManus, as Attorney-in-Fact|2026-03-16

Documents

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