---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-21-138160"
form_type: "8-K"
ticker: "QTRX"
cik: "0001503274"
company_name: "Quanterix Corp"
filed_at: "2021-11-12T23:59:59+00:00"
generated_at: "2026-06-28T09:08:21.061475+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Quanterix COO William Geist steps down; President Toloue adds operating duties

## Summary
- William Geist to depart as COO effective Nov 12, 2021; will assist with transition for 6 weeks.
- President Masoud Toloue assumes consolidated responsibility for all operating activities.
- Geist receives severance: base salary continuation of $400k for 12 months, $200k lump sum target bonus.
- Unvested equity that would have vested during the severance period accelerates upon separation.
- Separation agreement includes non-disparagement, confidentiality, and 1-year employee non-solicitation.

## SEC filing metadata
- accession: 0001104659-21-138160
- form_type: 8-K
- ticker: QTRX
- cik: 0001503274
- company_name: Quanterix Corp
- filed_at: 2021-11-12T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1503274/000110465921138160/0001104659-21-138160-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1503274/000110465921138160/tm2132575d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-21-138160
- JSON: https://secwatch.observer/filing/0001104659-21-138160.json
- Plain text: https://secwatch.observer/filing/0001104659-21-138160.txt

## Key facts
- Executive change
  William Geist departed as Chief Operating Officer at Quanterix Corp.
  - Action: stepping down
  - Role: Chief Operating Officer
  source text: the Company and William Geist, who previously served as the Company’s Chief Operating Officer, agreed that Mr. Geist would be stepping down from the Company effective November 12, 2021.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1503274/000110465921138160/0001104659-21-138160-index.htm
- Executive change
  Masoud Toloue changed role as President at Quanterix Corp.
  - Action: consolidated responsibility for operating activities
  - Role: President
  source text: consolidated responsibilty for the Company's operating activities under Masoud Toloue, President of Quanterix and Diagnostics.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1503274/000110465921138160/0001104659-21-138160-index.htm

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