---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-027241"
form_type: "8-K"
ticker: "PSNL"
cik: "0001527753"
company_name: "Personalis, Inc."
filed_at: "2023-06-09T23:59:59+00:00"
generated_at: "2026-06-14T03:49:09.843967+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Personalis dismisses Deloitte as auditor, appoints BDO USA as new independent accounting firm

## Summary
- Audit Committee dismissed Deloitte & Touche as independent auditor on June 6, 2023.
- Deloitte's audit reports for FY2021 and FY2022 contained no adverse opinion or qualification.
- No disagreements or reportable events between Company and Deloitte during the relevant periods.
- BDO USA, LLP was appointed as new auditor for FY2023, formally engaged on June 9, 2023.
- Deloitte provided a letter to SEC agreeing with the Company's disclosures.

## SEC filing metadata
- accession: 0000950170-23-027241
- form_type: 8-K
- ticker: PSNL
- cik: 0001527753
- company_name: Personalis, Inc.
- filed_at: 2023-06-09T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527753/000095017023027241/0000950170-23-027241-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527753/000095017023027241/psnl-20230606.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-027241
- JSON: https://secwatch.observer/filing/0000950170-23-027241.json
- Plain text: https://secwatch.observer/filing/0000950170-23-027241.txt

## Key facts
- Auditor Changes
  Personalis, Inc. engaged BDO USA, LLP as its auditor.
  - Action: engagement
  - Auditor: BDO USA, LLP
  source text: (b) Engagement of New Independent Registered Public Accounting Firm On June 6, 2023, the Audit Committee approved the engagement of BDO USA, LLP ("BDO") as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527753/000095017023027241/0000950170-23-027241-index.htm
- Auditor Changes
  Personalis, Inc. dismissed Deloitte & Touche LLP as its auditor.
  - Action: dismissal
  - Auditor: Deloitte & Touche LLP
  source text: On June 6, 2023, the Audit Committee of the Board of Directors (the “Audit Committee”) of Personalis, Inc., a Delaware corporation (the “Company”), dismissed Deloitte & Touche LLP (“Deloitte”) as the Company’s independent registered public accounting firm.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1527753/000095017023027241/0000950170-23-027241-index.htm

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