---
schema_version: "secwatch.filing_event.v1"
accession: "0001503274-25-000056"
form_type: "8-K"
ticker: "QTRX"
cik: "0001503274"
company_name: "Quanterix Corp"
filed_at: "2025-05-14T23:59:59+00:00"
generated_at: "2026-05-21T08:29:19.991405+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Quanterix dismisses EY, hires KPMG as auditor; cites material weaknesses and restatement

## Summary
- EY dismissed effective after Q1 2025 10-Q filing; Audit Committee selected KPMG for FY 2025 after RFP.
- EY reports on internal controls for 2023 and 2024 contained adverse opinions due to material weaknesses.
- Material weaknesses cited: inventory valuation (including labor/overhead capitalization) and Accelerator Laboratory revenue controls.
- Company restated financials for periods from Q1 2022 through Q2 2024 due to inventory valuation error.
- No disagreements with EY on accounting principles; new auditor KPMG has had no pre-engagement consultations.

## SEC filing metadata
- accession: 0001503274-25-000056
- form_type: 8-K
- ticker: QTRX
- cik: 0001503274
- company_name: Quanterix Corp
- filed_at: 2025-05-14T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1503274/000150327425000056/0001503274-25-000056-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1503274/000150327425000056/qtrx-20250509.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001503274-25-000056
- JSON: https://secwatch.observer/filing/0001503274-25-000056.json
- Plain text: https://secwatch.observer/filing/0001503274-25-000056.txt

## Key facts
- Auditor Changes
  Quanterix Corp dismissed Ernst and Young LLP as its auditor.
  - Action: dismissal
  - Auditor: Ernst and Young LLP
  - Successor: KPMG LLP
  source text: On May 9, 2025, Quanterix Corporation (the “Company”) dismissed Ernst and Young LLP (“EY”) as its independent registered public accounting firm, to be effective following the filing of the Company's quarterly report on Form 10-Q for the quarter ended March 31, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1503274/000150327425000056/0001503274-25-000056-index.htm
- Auditor Changes
  Quanterix Corp engaged KPMG LLP as its auditor.
  - Action: engagement
  - Auditor: KPMG LLP
  source text: On May 9, 2025, the Audit Committee approved the appointment of KPMG LLP (“KPMG”) as the Company’s new independent registered public accounting firm for the fiscal year ending December 31, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1503274/000150327425000056/0001503274-25-000056-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.