{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-127878","form_type":"8-K","ticker":"ADTN","cik":"0000926282","company_name":"ADTRAN Holdings, Inc.","filed_at":"2025-05-27T23:59:59+00:00","discovered_at":"2026-05-14T18:02:51.850578+00:00","generated_at":"2026-05-20T12:33:18.637134+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"ADTRAN Holdings reschedules 2025 annual meeting to July 24; prior proxies disregarded","bullets":["Annual meeting now July 24, 2025; new record date is May 29, 2025.","All previously submitted proxies will be disregarded; stockholders must revote.","Revised definitive proxy statement to be filed with SEC and delivered to stockholders."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-127878","json":"https://secwatch.observer/filing/0001193125-25-127878.json","markdown":"https://secwatch.observer/filing/0001193125-25-127878.md","text":"https://secwatch.observer/filing/0001193125-25-127878.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/926282/000119312525127878/0001193125-25-127878-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/926282/000119312525127878/d12892d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-20T12:33:18.637134+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"}