---
schema_version: "secwatch.filing_event.v1"
accession: "0001819438-25-000007"
form_type: "8-K"
ticker: "GWH"
cik: "0001819438"
company_name: "ESS Tech, Inc."
filed_at: "2025-08-07T23:59:59+00:00"
generated_at: "2026-05-17T18:10:12.754373+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# ESS Tech terminates CFO Anthony Rabb; appoints Kate Suhadolnik as interim CFO

## Summary
- Anthony Rabb terminated without severance effective August 1, 2025; not related to accounting or financial reporting issues.
- Kate Suhadolnik, Controller since April 2023, appointed interim CFO and principal financial/accounting officer.
- Suhadolnik has 14 years experience, previously at Deloitte and The Standard; CPA; annual salary $220k plus bonus.
- Board conducting search for permanent CFO replacement from internal and external candidates.

## SEC filing metadata
- accession: 0001819438-25-000007
- form_type: 8-K
- ticker: GWH
- cik: 0001819438
- company_name: ESS Tech, Inc.
- filed_at: 2025-08-07T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819438/000181943825000007/0001819438-25-000007-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819438/000181943825000007/wk-20250801.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001819438-25-000007
- JSON: https://secwatch.observer/filing/0001819438-25-000007.json
- Plain text: https://secwatch.observer/filing/0001819438-25-000007.txt

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