{"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","discovered_at":"2026-05-14T18:03:40.835357+00:00","generated_at":"2026-06-16T01:31:02.851856+00:00","sec_items":["4.01","9.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"ESS Tech appoints KPMG as new independent auditor for FY 2023 after EY declined re-election","bullets":["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."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-23-015233","json":"https://secwatch.observer/filing/0001628280-23-015233.json","markdown":"https://secwatch.observer/filing/0001628280-23-015233.md","text":"https://secwatch.observer/filing/0001628280-23-015233.txt","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"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-16T01:31:02.851856+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"}