{"filing":{"accession_number":"0001819438-26-000065","cik":"0001819438","ticker":"GWH-WT","company_name":"ESS Tech, Inc.","form":"8-K","filing_date":"2026-07-16","report_date":null,"primary_document":"wk-20260716.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1819438/000181943826000065/wk-20260716.htm"},"events":[{"id":18526,"run_id":16652,"accession_number":"0001819438-26-000065","anchor_item_number":"1.01","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.92,"summary":"ESS Tech entered into an amendment to its at-the-market (ATM) offering program to sell $75 million of common stock shares. ATM offerings are unregistered equity issuances that are dilutive to existing shareholders. The filing discloses the amendment to the Sales Agreement with multiple underwriters, including termination of certain agents and addition of Roth Capital Partners. This is a material capital-raising event typical of dilutive equity issuances at small- and mid-cap companies.","company_name":"ESS Tech, Inc.","ticker":"GWH-WT","filing_date":"2026-07-16","form":"8-K","submitted_at":null,"items":[{"id":17358,"accession_number":"0001819438-26-000065","item_number":"1.01","item_title":"Entry into a Material Definitive Agreement.","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.92,"reasoning":"ESS Tech entered into an amendment to its at-the-market (ATM) offering program to sell $75 million of common stock shares. ATM offerings are unregistered equity issuances that are dilutive to existing shareholders. The filing discloses the amendment to the Sales Agreement with multiple underwriters, including termination of certain agents and addition of Roth Capital Partners. This is a material capital-raising event typical of dilutive equity issuances at small- and mid-cap companies.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-17T10:02:08.831763+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":17358,"accession_number":"0001819438-26-000065","item_number":"1.01","item_title":"Entry into a Material Definitive Agreement.","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.92,"reasoning":"ESS Tech entered into an amendment to its at-the-market (ATM) offering program to sell $75 million of common stock shares. ATM offerings are unregistered equity issuances that are dilutive to existing shareholders. The filing discloses the amendment to the Sales Agreement with multiple underwriters, including termination of certain agents and addition of Roth Capital Partners. This is a material capital-raising event typical of dilutive equity issuances at small- and mid-cap companies.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-17T10:02:08.831763+00:00","company_name":"ESS Tech, Inc.","ticker":"GWH-WT","filing_date":"2026-07-16"}]}