{"schema_version":"secwatch.filing_event.v1","accession":"0001076598-25-000332","form_type":"8-K","ticker":"EOT","cik":"0001454741","company_name":"Eaton Vance National Municipal Opportunities Trust","filed_at":"2025-08-14T23:59:59+00:00","discovered_at":"2026-05-14T18:02:44.021637+00:00","generated_at":"2026-05-17T13:06:12.356870+00:00","sec_items":["8.01"],"event_type":"leadership","sentiment":"negative","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Chairperson Mark R. Fetting dies unexpectedly; Board reduced to 9 members","bullets":["Mark R. Fetting passed away on August 9, 2025.","Susan J. Sutherland is serving as acting Chairperson.","Board size reduced from ten to nine members effective August 12, 2025."],"urls":{"canonical":"https://secwatch.observer/filing/0001076598-25-000332","json":"https://secwatch.observer/filing/0001076598-25-000332.json","markdown":"https://secwatch.observer/filing/0001076598-25-000332.md","text":"https://secwatch.observer/filing/0001076598-25-000332.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1454741/000107659825000332/0001076598-25-000332-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1454741/000107659825000332/eot8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T13:06:12.356870+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"}