{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-24-010886","form_type":"8-K","ticker":"GWH","cik":"0001819438","company_name":"ESS Tech, Inc.","filed_at":"2024-03-13T23:59:59+00:00","discovered_at":"2026-05-14T18:03:25.677976+00:00","generated_at":"2026-06-04T22:28:41.123167+00:00","sec_items":["2.02","9.01"],"event_type":"earnings","sentiment":"positive","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"ESS Tech reports record FY 2023 revenue of $7.5M, lowers Q4 adj. EBITDA loss >50% YoY","bullets":["Q4 & FY 2023 revenue: $7.5M (record); cash & short-term investments >$100M exiting 2023.","Q4 adjusted EBITDA loss cut by more than half YoY; EW manufacturing cost reduced ~60% in 2023.","Delivered first Energy Warehouses to Honeywell; first Energy Center lifted, slated for PGE in 2024.","Guides 40% EW cost reduction in 2024 to achieve non-GAAP gross margin profitability."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-24-010886","json":"https://secwatch.observer/filing/0001628280-24-010886.json","markdown":"https://secwatch.observer/filing/0001628280-24-010886.md","text":"https://secwatch.observer/filing/0001628280-24-010886.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1819438/000162828024010886/0001628280-24-010886-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1819438/000162828024010886/wk-20240313.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-04T22:28:41.123167+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":[{"claim_id":"45fe0f3f6d1234c5e11eefb97b306d006e52e552","claim":"ESS Tech, Inc. reported fourth quarter and full year ended December 31, 2023 results: revenue $7.5M for FY 2023.","evidence_excerpt":"ESS Tech, Inc. (“ESS,” “ESS, Inc.” or the “Company”) (NYSE:GWH), a leading manufacturer of long-duration energy storage systems (LDES) for commercial and utility-scale applications, today announced financial results for its fourth quarter and full year ended December 31, 2023.","evidence_source":"SEC 8-K Item 2.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1819438/000162828024010886/0001628280-24-010886-index.htm","confidence":0.9,"family_label":"Earnings Releases","details":[{"label":"Period","value":"fourth quarter and full year ended December 31, 2023"},{"label":"Revenue","value":"$7.5M for FY 2023"},{"label":"Result","value":"reported results"}],"fact_type":"earnings_release"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}