---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-270913"
form_type: "8-K"
ticker: "DXCM"
cik: "0001093557"
company_name: "DEXCOM INC"
filed_at: "2021-09-13T23:59:59+00:00"
generated_at: "2026-06-29T04:04:31.037535+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# DexCom COO Quentin Blackford resigns effective Sept 17 to pursue other opportunity

## Summary
- Quentin Blackford notified DexCom of resignation as Chief Operating Officer, effective Sept 17, 2021.
- Resignation is to pursue another employment opportunity; no replacement was announced.
- Departure not related to any disagreement with DexCom on operations, policies, or practices.

## SEC filing metadata
- accession: 0001193125-21-270913
- form_type: 8-K
- ticker: DXCM
- cik: 0001093557
- company_name: DEXCOM INC
- filed_at: 2021-09-13T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1093557/000119312521270913/0001193125-21-270913-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1093557/000119312521270913/d210316d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-270913
- JSON: https://secwatch.observer/filing/0001193125-21-270913.json
- Plain text: https://secwatch.observer/filing/0001193125-21-270913.txt

## Key facts
- Executive change
  Quentin Blackford resigned as Chief Operating Officer at DEXCOM INC.
  - Action: resigned
  - Role: Chief Operating Officer
  source text: On September 8, 2021, DexCom, Inc. (“ Dexcom ”) received notice from Quentin Blackford of his intention to resign as Chief Operating Officer of Dexcom effective on September 17, 2021, in order to pursue another employment opportunity.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1093557/000119312521270913/0001193125-21-270913-index.htm

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