---
schema_version: "secwatch.filing_event.v1"
accession: "0001576280-23-000049"
form_type: "8-K"
ticker: "GH"
cik: "0001576280"
company_name: "Guardant Health, Inc."
filed_at: "2023-04-10T23:59:59+00:00"
generated_at: "2026-06-17T04:08:25.181281+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Guardant Health replaces EY with Deloitte as independent auditor; no disagreements cited

## Summary
- Audit committee approved dismissal of Ernst & Young and engagement of Deloitte effective April 4, 2023.
- EY's audit reports for FY2022 and FY2021 were unqualified with no adverse opinion.
- No disagreements or reportable events occurred during the past two fiscal years or subsequent interim period.
- EY agreed with the disclosures in a letter dated April 10, 2023, filed as Exhibit 16.1.

## SEC filing metadata
- accession: 0001576280-23-000049
- form_type: 8-K
- ticker: GH
- cik: 0001576280
- company_name: Guardant Health, Inc.
- filed_at: 2023-04-10T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1576280/000157628023000049/0001576280-23-000049-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1576280/000157628023000049/gh-20230404.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001576280-23-000049
- JSON: https://secwatch.observer/filing/0001576280-23-000049.json
- Plain text: https://secwatch.observer/filing/0001576280-23-000049.txt

## Key facts
- Auditor Changes
  Guardant Health, Inc. dismissed Ernst & Young LLP as its auditor.
  - Action: dismissal
  - Auditor: Ernst & Young LLP
  - Successor: Deloitte & Touche LLP
  source text: dismissed Ernst & Young LLP (“Ernst & Young”) as the Company’s independent registered public accounting firm, each effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1576280/000157628023000049/0001576280-23-000049-index.htm
- Auditor Changes
  Guardant Health, Inc. engaged Deloitte & Touche LLP as its auditor.
  - Action: engagement
  - Auditor: Deloitte & Touche LLP
  source text: approved the engagement of Deloitte & Touche LLP (“Deloitte”) as the Company’s independent registered public accounting firm
  evidence_url: https://www.sec.gov/Archives/edgar/data/1576280/000157628023000049/0001576280-23-000049-index.htm

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