{"schema_version":"secwatch.filing_event.v1","accession":"0001076598-25-000390","form_type":"8-K","ticker":"EOT","cik":"0001454741","company_name":"Eaton Vance National Municipal Opportunities Trust","filed_at":"2025-08-28T23:59:59+00:00","discovered_at":"2026-05-14T18:02:44.021833+00:00","generated_at":"2026-05-17T09:25:58.726800+00:00","sec_items":["8.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Board appoints Scott E. Wennerholm as Chairperson for 4-year term","bullets":["Scott E. Wennerholm appointed Chairperson of the Board effective August 27, 2025.","Replaces Susan J. Sutherland, acting Chairperson since August 9, 2025, after former Chairperson passed away.","Term of 4 years; succession follows the passing of the prior Chairperson."],"urls":{"canonical":"https://secwatch.observer/filing/0001076598-25-000390","json":"https://secwatch.observer/filing/0001076598-25-000390.json","markdown":"https://secwatch.observer/filing/0001076598-25-000390.md","text":"https://secwatch.observer/filing/0001076598-25-000390.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1454741/000107659825000390/0001076598-25-000390-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1454741/000107659825000390/eot8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T09:25:58.726800+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}