{"schema_version":"secwatch.filing_event.v1","accession":"0001819438-26-000053","form_type":"8-K","ticker":"GWH","cik":"0001819438","company_name":"ESS Tech, Inc.","filed_at":"2026-06-23T12:36:41+00:00","discovered_at":"2026-06-23T12:40:00.215408+00:00","generated_at":"2026-06-23T12:40:14.164334+00:00","sec_items":["2.02","8.01","7.01","9.01"],"event_type":"other_material","sentiment":"negative","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"ESS accelerates sodium-ion BESS, reports $13.6M cash, streamlines Wilsonville ops","bullets":["Cash, equivalents and short-term investments of $13.6M as of May 31, 2026 (unaudited).","Citing strong early demand, ESS is accelerating sodium-ion BESS development; identifies ~$1B in early-stage opportunities.","Streamlining Wilsonville operations, reducing expenses and cash burn to reallocate capital to sodium-ion and related solutions.","Will continue iron flow battery development for long-duration, but shifts primary focus to sodium-ion for near-term revenue.","Updated risk factors reflect NYSE minimum share price non-compliance (previously reported June 15, 2026) and the strategic pivot."],"urls":{"canonical":"https://secwatch.observer/filing/0001819438-26-000053","json":"https://secwatch.observer/filing/0001819438-26-000053.json","markdown":"https://secwatch.observer/filing/0001819438-26-000053.md","text":"https://secwatch.observer/filing/0001819438-26-000053.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1819438/000181943826000053/0001819438-26-000053-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1819438/000181943826000053/wk-20260623.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-23T12:40:14.164334+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"}