Former Executive Chair · Quanterix Corp (QTRX)

William Donnelly

FY2025 is the first fiscal year CompBrief holds for William Donnelly as a named executive officer of Quanterix; the record below is that year, complete. Every figure below is printed as the company filed it and cited to the filing it came from.

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Total disclosed compensation, FY2025

$596,842

3rd of 3 named executive officers at Quanterix by FY2025 total.

3 named officers on file for Quanterix, FY2025

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What this number hides

The filing gives the total. Quanterix’s full Executive Compensation Report gives every award, the disclosed peer set and what the total leaves out — the pair adds the board’s.

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Compensation figures as of the proxy filed April 24, 2026 (DEF 14A). Insider transactions since that proxy, current to 2026-11-10.

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William Donnelly compensation by year

Quanterix Summary Compensation Table · the one fiscal year held
In US dollars, as Quanterix reports it. Most recent year shaded. Totals are the company’s disclosed totals.
ComponentFY2025
Salary$19,321
Bonus$0
Stock awards$80,001
Option awards$408,110
Pension and deferred compensation$0
All other$89,410
Total$596,842

Each year as stated in that year's proxy. A dash means the company reported no figure in that column. Source: Quanterix Corp DEF 14A filed April 24, 2026, accession 0001104659-26-048166, and prior-year filings. Open the filing on EDGAR.

How this page was built: the Quanterix Corp filed document, accession 0001104659-26-048166. Every figure is read from that document and cited to the page and table it appears in. Filed April 24, 2026.

Equity holdings

unvested awards at FY2025 year-end
TypeUnvested unitsValue at year-endExercise price
RSU2,802$17,821—
Option67,170—$5.91
Option2,407—$23.90

Per the Outstanding Equity Awards at Fiscal Year-End table in Quanterix Corp's FY2025 proxy; value at the fiscal year-end close, as the company printed it.

Insider transactions since the last proxy

6 Form 4 lines since the FY2025 proxy (filed April 24, 2026)
current to 2026-11-10 · updated nightly
DateTransactionPlanSharesPriceHeld after
2026-10-01Grant or award—6,964$3.41169,365
2026-08-17Exercise or conversion—2,802—162,401
2026-08-17Exercise or conversion derivative—2,802$0.000
2026-08-13Purchase—72,245$2.9399,400
2026-08-12Purchase—27,155$2.7527,155
2026-07-01Grant or award—5,472$4.34160,305

The 6 most recent of 6 lines, each as reported on the Form 4. "10b5-1" marks a trade the filing reports under a pre-arranged trading plan. View every Form 4 filing on EDGAR →

Quanterix’s named executive officers, FY2025

as the company reported each
Named executive officerRoleFY2025 total
Masoud ToloueFormer President and Chief Executive Officer$5,250,745
Vandana SriramChief Financial Officer and Treasurer$2,212,229
William Donnelly · this pageFormer Executive Chair$596,842

Board service

Quanterix board · FY2025

How this board is paid

Company policy: Quanterix pays directors a $50,000 cash retainer and $200,000 in equity. As stated in Quanterix's FY2025 proxy.

William Donnelly's compensation dossier, Quanterix

You have read William Donnelly's totals and holdings. The dossier adds each equity grant Quanterix disclosed for William Donnelly and Quanterix's own disclosed peer group, where the company discloses them, with every row in a PDF and a CSV cited to its filing.

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The full Quanterix compensation record

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This page is one person within Quanterix's record. The company brief lists every named executive, each linking to their own page.

Compensation, the day it’s disclosed

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How this record is built

Every figure on this page is one figure from a public SEC filing, printed as the filing states it and cited to the document. Compensation totals are Quanterix's own disclosed totals, not summed by Velarion. Insider transactions are read from Form 4 filings and cover every line filed since the most recent proxy. Nothing is estimated by Velarion; where the company does not disclose a value the cell reads "—", and a section appears only where the company discloses the data. Corrections: records@velarion.ai.

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William Donnelly's compensation dossier