{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-25-015647","form_type":"8-K","ticker":"GWH","cik":"0001819438","company_name":"ESS Tech, Inc.","filed_at":"2025-03-31T23:59:59+00:00","discovered_at":"2026-05-14T18:03:05.051411+00:00","generated_at":"2026-05-24T02:10:28.149475+00:00","sec_items":["2.02","9.01"],"event_type":"earnings","sentiment":"neutral","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"ESS Tech reports FY2024 revenue of $6.3M, misses guidance; reaches Energy Center cost target early","bullets":["FY2024 revenue of $6.3M was below the low end of guidance due to partner funding delays.","Achieved breakeven profitability on latest Energy Center design in Q4, nearly a year ahead of schedule.","Delivered eight Energy Center systems to a major Florida utility; commissioning expected later in 2025.","Announced Energy Base, a new modular gigawatt-hour-scale LDES solution for grid-scale applications.","Global fleet surpassed 2 GWh of transacted energy; received UL 9540 certification and MESA compliance."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-25-015647","json":"https://secwatch.observer/filing/0001628280-25-015647.json","markdown":"https://secwatch.observer/filing/0001628280-25-015647.md","text":"https://secwatch.observer/filing/0001628280-25-015647.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1819438/000162828025015647/0001628280-25-015647-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1819438/000162828025015647/wk-20250331.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-24T02:10:28.149475+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"}