---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-23-015233"
form_type: "8-K"
ticker: "GWH"
cik: "0001819438"
company_name: "ESS Tech, Inc."
filed_at: "2023-05-03T23:59:59+00:00"
generated_at: "2026-06-16T01:31:02.851856+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# ESS Tech appoints KPMG as new independent auditor for FY 2023 after EY declined re-election

## Summary
- Audit Committee appointed KPMG as independent registered public accounting firm on May 2, 2023, effective immediately.
- No consultations between the company and KPMG on accounting principles or audit opinions during the past two fiscal years or subsequent interim period.
- Predecessor auditor EY declined to stand for re-election for FY 2023 as previously disclosed; no reportable disagreements or events.
- EY confirmed agreement with company's statements in a May 3, 2023 letter attached as Exhibit 16.1.

## SEC filing metadata
- accession: 0001628280-23-015233
- form_type: 8-K
- ticker: GWH
- cik: 0001819438
- company_name: ESS Tech, Inc.
- filed_at: 2023-05-03T23:59:59+00:00
- event_type: other
- 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/1819438/000162828023015233/0001628280-23-015233-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819438/000162828023015233/wk-20230503.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-23-015233
- JSON: https://secwatch.observer/filing/0001628280-23-015233.json
- Plain text: https://secwatch.observer/filing/0001628280-23-015233.txt

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