{"filing":{"accession_number":"0001171843-26-004189","cik":"0001370416","ticker":"WPRT","company_name":"WESTPORT FUEL SYSTEMS INC.","form":"6-K","filing_date":"2026-06-18","report_date":null,"primary_document":"f6k_061726.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1370416/000117184326004189/f6k_061726.htm"},"events":[{"id":12014,"run_id":10575,"accession_number":"0001171843-26-004189","anchor_item_number":"EX-99.1","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"summary":"This press release announces a development agreement between Cespira (Westport's joint venture with Volvo Group) and Volvo Group to finalize hydrogen-fueled engine development using Cespira's HPDI™ fuel system technology. The disclosure describes a material strategic partnership milestone—extending proven LNG technology to hydrogen applications with a targeted commercial launch before 2030—that would affect a reasonable investor's assessment of Westport's technology roadmap and market opportunities, but does not fit the specific categories of M\u0026A activity, earnings, executive changes, or financial obligations.","company_name":"WESTPORT FUEL SYSTEMS INC.","ticker":"WPRT","filing_date":"2026-06-18","form":"6-K","submitted_at":null,"items":[{"id":8747,"accession_number":"0001171843-26-004189","item_number":"EX-99.1","item_title":"exh_991.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"This press release announces a development agreement between Cespira (Westport's joint venture with Volvo Group) and Volvo Group to finalize hydrogen-fueled engine development using Cespira's HPDI™ fuel system technology. The disclosure describes a material strategic partnership milestone—extending proven LNG technology to hydrogen applications with a targeted commercial launch before 2030—that would affect a reasonable investor's assessment of Westport's technology roadmap and market opportunities, but does not fit the specific categories of M\u0026A activity, earnings, executive changes, or financial obligations.","classifier_version":"claude-haiku-4-5-20251001+prompt-08fd3440","taxonomy_version":"v1.2","classified_at":"2026-06-21T18:55:20.896017+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":8747,"accession_number":"0001171843-26-004189","item_number":"EX-99.1","item_title":"exh_991.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"This press release announces a development agreement between Cespira (Westport's joint venture with Volvo Group) and Volvo Group to finalize hydrogen-fueled engine development using Cespira's HPDI™ fuel system technology. The disclosure describes a material strategic partnership milestone—extending proven LNG technology to hydrogen applications with a targeted commercial launch before 2030—that would affect a reasonable investor's assessment of Westport's technology roadmap and market opportunities, but does not fit the specific categories of M\u0026A activity, earnings, executive changes, or financial obligations.","classifier_version":"claude-haiku-4-5-20251001+prompt-08fd3440","taxonomy_version":"v1.2","classified_at":"2026-06-21T18:55:20.896017+00:00","company_name":"WESTPORT FUEL SYSTEMS INC.","ticker":"WPRT","filing_date":"2026-06-18"}]}