{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-23-005826","form_type":"8-K","ticker":"GWH","cik":"0001819438","company_name":"ESS Tech, Inc.","filed_at":"2023-03-01T23:59:59+00:00","discovered_at":"2026-05-14T18:03:46.758936+00:00","generated_at":"2026-06-18T18:40:26.786352+00:00","sec_items":["2.02","9.01"],"event_type":"earnings","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"medium","headline":"ESS Tech reports record Q4 unit deliveries; annual capacity reaches ~800 MWh","bullets":["Delivered record 14 Energy Warehouses in Q4 2022.","Annual production capacity reached nearly 800 MWh with new automated line.","Signed agreements with Burbank Water & Power, Consumers Energy, Amsterdam Airport Schiphol, and Turlock Irrigation District.","CEO cites supply chain challenges; plans more calculated scaling in 2023 to improve unit profitability.","Financial results (revenue, net income) not included in the furnished press release excerpt."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-23-005826","json":"https://secwatch.observer/filing/0001628280-23-005826.json","markdown":"https://secwatch.observer/filing/0001628280-23-005826.md","text":"https://secwatch.observer/filing/0001628280-23-005826.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1819438/000162828023005826/0001628280-23-005826-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1819438/000162828023005826/wk-20230301.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-18T18:40:26.786352+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":"7a78830ab14f6b7b02772162bffc1c0ddf22f3c0","claim":"ESS Tech, Inc. reported financial results for fourth quarter and full year ended December 31, 2022.","evidence_excerpt":"ESS Tech, Inc. issued a press release announcing financial results for the quarter and year ended December 31, 2022.","evidence_source":"SEC 8-K Item 2.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1819438/000162828023005826/0001628280-23-005826-index.htm","confidence":0.9,"family_label":"Earnings Releases","details":[{"label":"Period","value":"fourth quarter and full year ended December 31, 2022"},{"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"}