{"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","discovered_at":"2026-05-14T18:02:45.117597+00:00","generated_at":"2026-05-17T18:10:12.754373+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"negative","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"ESS Tech terminates CFO Anthony Rabb; appoints Kate Suhadolnik as interim CFO","bullets":["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."],"urls":{"canonical":"https://secwatch.observer/filing/0001819438-25-000007","json":"https://secwatch.observer/filing/0001819438-25-000007.json","markdown":"https://secwatch.observer/filing/0001819438-25-000007.md","text":"https://secwatch.observer/filing/0001819438-25-000007.txt","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"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T18:10:12.754373+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}