Sriram Vandana 4

4 · Quanterix Corp · Filed Feb 18, 2026

AI-generated summary of this filing

Updated Feb 18, 2026

Quanterix (QTRX) CFO Sriram Vandana Receives 149,810 Awarded Shares

What Happened

Sriram Vandana, Chief Financial Officer of Quanterix Corp (QTRX), received large equity awards and converted a small number of derivative units into common stock. The filing shows two grants of 74,905 derivative awards (each reported as acquired at $0.00) for a total of 149,810 awarded units.
Vandana also had conversions/exercises of derivative units totaling 777 shares (514 + 263). To cover tax withholding on those conversions, 271 shares (179 + 92) were surrendered/disposed at $5.74 per share, generating cash of $1,027 and $528 respectively (total ≈ $1,555). The awards themselves were reported as derivatives/PSU/RSU grants with no immediate cash value.

Key Details

Transaction date(s): February 15, 2026; Form 4 filed February 18, 2026 (filed shortly after the transactions; may be one business day past the usual two-business-day Form 4 deadline).
Prices and proceeds: tax-withholding dispositions were 179 shares at $5.74 ($1,027) and 92 shares at $5.74 ($528), total ≈ $1,555. Awarded units reported at $0.00 (derivative awards).
Shares reported acquired: two awards of 74,905 shares each (total 149,810 derivative units). Conversions/exercises: 514 and 263 units converted. Shares disposed for tax withholding: 271 shares.
Shares owned after transaction: not specified in the provided transaction summary.
Notable footnotes: F1 (RSUs convert 1:1 into common stock); F2 (55,884 unvested RSUs previously reported will now be shown in Table II); F3–F4 (PSU/award vesting details — performance conditions and 4-year annual vesting schedule); F5–F6 (prior RSU grants and their vesting cadence).
Transaction codes: A = award/grant, M = exercise/conversion of derivative, F = payment of exercise price/tax liability (shares withheld).

Context

These entries reflect equity awards (RSUs/PSUs) and routine tax-withholding on conversions, not an open-market buy or sale for investment purposes. The awards have vesting/performance conditions (per footnotes) and therefore represent potential future shares rather than immediate purchases. The small number of shares surrendered were used to satisfy tax liabilities (common practice, not a market sentiment signal).

Form 4

Period: 2026-02-15

Chief Financial Officer

Transactions

Exercise/Conversion
Common Stock
[F1][F2]
2026-02-15+514→ 26,248 total
Tax Payment
Common Stock
2026-02-15$5.74/sh−179$1,027→ 26,069 total
Exercise/Conversion
Common Stock
[F1]
2026-02-15+263→ 26,332 total
Tax Payment
Common Stock
2026-02-15$5.74/sh−92$528→ 26,240 total
Award
Performance Stock Unit
[F3]
2026-02-15+74,905→ 74,905 total
Exercise: $0.00Exp: 2026-12-31→ Common Stock (74,905 underlying)
Award
Restricted Stock Unit
[F4]
2026-02-15+74,905→ 74,905 total
Exercise: $0.00→ Common Stock (74,905 underlying)
Exercise/Conversion
Restricted Stock Unit
[F5]
2026-02-15−263→ 4,734 total
Exercise: $0.00→ Common Stock (263 underlying)
Exercise/Conversion
Restricted Stock Unit
[F6]
2026-02-15−514→ 12,339 total
Exercise: $0.00→ Common Stock (514 underlying)

Footnotes (6)

[F1]Restricted stock units convert into common stock on a one-for-one basis.
[F2]The total shown no longer includes 55,884 unvested RSUs which the reporting person previously reported in Table I of Form 4 and will hereafter report in Table II of Form 4.
[F3]Each PSU award to vest (subject to the employee's continued service to the Company on the applicable vesting dates) according to the schedule and conditions set forth in the executive long-term incentive plan contained in the Company's 2026 Employee Equity Guidelines. After the award's performance conditions are satisfied, the PSUs will vest in four equal annual installments on each of the first four anniversaries of the Transaction Date.
[F4]The award vests in four equal annual installments on each of the first four anniversaries of the Transaction Date.
[F5]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.
[F6]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.

Signature

/s/ Bonnie McManus, as Attorney-in-Fact|2026-02-18

2 files