{"filing":{"accession_number":"0001466593-26-000057","cik":"0001466593","ticker":"OTTR","company_name":"Otter Tail Corp","form":"8-K","filing_date":"2026-05-29","report_date":null,"primary_document":"ottr-20260528.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1466593/000146659326000057/ottr-20260528.htm"},"events":[{"id":8197,"run_id":7190,"accession_number":"0001466593-26-000057","anchor_item_number":"1.01","event_type":"material_litigation","event_domain":"legal","is_material":true,"confidence":0.92,"summary":"The filing discloses settlement of putative federal antitrust class action litigation (In re: PVC Pipe Antitrust Litigation) with two of three plaintiff classes, involving aggregate settlement payments of $73.5 million ($39.5 million to Direct Purchasers and $34.0 million to Non-Converter Seller Purchasers). This material litigation settlement would significantly affect a reasonable investor's assessment of the company's financial exposure and legal risk, even though the company does not admit wrongdoing.","company_name":"Otter Tail Corp","ticker":"OTTR","filing_date":"2026-05-29","submitted_at":null,"items":[{"id":2823,"accession_number":"0001466593-26-000057","item_number":"1.01","item_title":"Entry into a Material Definitive Agreement.","event_type":"material_litigation","event_domain":"legal","is_material":true,"confidence":0.92,"reasoning":"The filing discloses settlement of putative federal antitrust class action litigation (In re: PVC Pipe Antitrust Litigation) with two of three plaintiff classes, involving aggregate settlement payments of $73.5 million ($39.5 million to Direct Purchasers and $34.0 million to Non-Converter Seller Purchasers). This material litigation settlement would significantly affect a reasonable investor's assessment of the company's financial exposure and legal risk, even though the company does not admit wrongdoing.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-05-30T02:35:41.115649+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":2823,"accession_number":"0001466593-26-000057","item_number":"1.01","item_title":"Entry into a Material Definitive Agreement.","event_type":"material_litigation","event_domain":"legal","is_material":true,"confidence":0.92,"reasoning":"The filing discloses settlement of putative federal antitrust class action litigation (In re: PVC Pipe Antitrust Litigation) with two of three plaintiff classes, involving aggregate settlement payments of $73.5 million ($39.5 million to Direct Purchasers and $34.0 million to Non-Converter Seller Purchasers). This material litigation settlement would significantly affect a reasonable investor's assessment of the company's financial exposure and legal risk, even though the company does not admit wrongdoing.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-05-30T02:35:41.115649+00:00","company_name":"Otter Tail Corp","ticker":"OTTR","filing_date":"2026-05-29"}]}