{"filing":{"accession_number":"0001819438-26-000053","cik":"0001819438","ticker":"GWH-WT","company_name":"ESS Tech, Inc.","form":"8-K","filing_date":"2026-06-23","report_date":null,"primary_document":"wk-20260623.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1819438/000181943826000053/wk-20260623.htm"},"events":[{"id":13034,"run_id":11565,"accession_number":"0001819438-26-000053","anchor_item_number":"2.02","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"summary":"ESS Tech announced a strategic pivot to accelerate sodium-ion battery development with early-stage opportunities approaching $1 billion, while streamlining Wilsonville operations, reducing expenses and headcount, and reallocating capital from iron flow battery development to sodium-ion solutions.","company_name":"ESS Tech, Inc.","ticker":"GWH-WT","filing_date":"2026-06-23","form":"8-K","submitted_at":null,"items":[{"id":10064,"accession_number":"0001819438-26-000053","item_number":"2.02","item_title":"Results of Operations and Financial Conditions.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"ESS Tech disclosed a material strategic pivot to accelerate sodium-ion battery development following strong customer interest, with early-stage opportunities approaching $1 billion. The company is streamlining Wilsonville operations, reducing expenses and headcount, and reallocating capital from iron flow battery development to sodium-ion solutions. This represents a significant operational and strategic business decision affecting product focus, resource allocation, and manufacturing operations, rather than a discrete financial result or earnings release.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-23T12:38:06.127939+00:00","company_name":"","ticker":null,"filing_date":""},{"id":10065,"accession_number":"0001819438-26-000053","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"ESS Tech announced a strategic pivot to accelerate sodium-ion battery development while streamlining Wilsonville operations and reducing expenses to reallocate capital. This is a material operational and strategic business event involving a significant shift in product focus, operational restructuring, and capital reallocation. While the filing mentions workforce reduction and operational streamlining, the core disclosure centers on the strategic decision to redirect resources toward sodium-ion solutions with greater near-term revenue potential, which is primarily an operational/strategic matter rather than a discrete workforce reduction event.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-23T12:38:06.127939+00:00","company_name":"","ticker":null,"filing_date":""}]},{"id":13035,"run_id":11565,"accession_number":"0001819438-26-000053","anchor_item_number":"8.01","event_type":"delisting_risk","event_domain":"terminal","is_material":true,"confidence":0.85,"summary":"ESS Tech received written notice from the NYSE indicating the Company did not satisfy the continued listing standard in Section 802.01C of the NYSE Listed Company Manual relating to the minimum share price requirement, as previously reported in a Form 8-K filed June 15, 2026.","company_name":"ESS Tech, Inc.","ticker":"GWH-WT","filing_date":"2026-06-23","form":"8-K","submitted_at":null,"items":[{"id":10066,"accession_number":"0001819438-26-000053","item_number":"8.01","item_title":"Other Information.","event_type":"delisting_risk","event_domain":"terminal","is_material":true,"confidence":0.85,"reasoning":"The Item 8.01 disclosure explicitly references receipt of written notice from the NYSE indicating the Company did not satisfy the continued listing standard in Section 802.01C of the NYSE Listed Company Manual relating to the minimum share price requirement, as previously reported in a Form 8-K filed June 15, 2026. This is a direct delisting risk notification. While the section also discusses cash position and updates to risk factors related to the sodium-ion strategy, the delisting notice is the material regulatory event requiring disclosure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-23T12:38:06.127939+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":10064,"accession_number":"0001819438-26-000053","item_number":"2.02","item_title":"Results of Operations and Financial Conditions.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"ESS Tech disclosed a material strategic pivot to accelerate sodium-ion battery development following strong customer interest, with early-stage opportunities approaching $1 billion. The company is streamlining Wilsonville operations, reducing expenses and headcount, and reallocating capital from iron flow battery development to sodium-ion solutions. This represents a significant operational and strategic business decision affecting product focus, resource allocation, and manufacturing operations, rather than a discrete financial result or earnings release.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-23T12:38:06.127939+00:00","company_name":"ESS Tech, Inc.","ticker":"GWH-WT","filing_date":"2026-06-23"},{"id":10065,"accession_number":"0001819438-26-000053","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"ESS Tech announced a strategic pivot to accelerate sodium-ion battery development while streamlining Wilsonville operations and reducing expenses to reallocate capital. This is a material operational and strategic business event involving a significant shift in product focus, operational restructuring, and capital reallocation. While the filing mentions workforce reduction and operational streamlining, the core disclosure centers on the strategic decision to redirect resources toward sodium-ion solutions with greater near-term revenue potential, which is primarily an operational/strategic matter rather than a discrete workforce reduction event.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-23T12:38:06.127939+00:00","company_name":"ESS Tech, Inc.","ticker":"GWH-WT","filing_date":"2026-06-23"},{"id":10066,"accession_number":"0001819438-26-000053","item_number":"8.01","item_title":"Other Information.","event_type":"delisting_risk","event_domain":"terminal","is_material":true,"confidence":0.85,"reasoning":"The Item 8.01 disclosure explicitly references receipt of written notice from the NYSE indicating the Company did not satisfy the continued listing standard in Section 802.01C of the NYSE Listed Company Manual relating to the minimum share price requirement, as previously reported in a Form 8-K filed June 15, 2026. This is a direct delisting risk notification. While the section also discusses cash position and updates to risk factors related to the sodium-ion strategy, the delisting notice is the material regulatory event requiring disclosure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-23T12:38:06.127939+00:00","company_name":"ESS Tech, Inc.","ticker":"GWH-WT","filing_date":"2026-06-23"}]}