{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-24-089974","form_type":"8-K","ticker":"ADTN","cik":"0000926282","company_name":"ADTRAN Holdings, Inc.","filed_at":"2024-08-02T23:59:59+00:00","discovered_at":"2026-05-14T18:03:16.398858+00:00","generated_at":"2026-05-31T13:34:36.686303+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"ADTRAN board member Brian Protiva resigns effective July 31, 2024","bullets":["Brian Protiva resigned from the Board of Directors on July 31, 2024.","Resignation was not due to any disagreement with the Company or the Board.","No replacement has been announced as of the filing date."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-24-089974","json":"https://secwatch.observer/filing/0000950170-24-089974.json","markdown":"https://secwatch.observer/filing/0000950170-24-089974.md","text":"https://secwatch.observer/filing/0000950170-24-089974.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/926282/000095017024089974/0000950170-24-089974-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/926282/000095017024089974/adtn-20240731.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-31T13:34:36.686303+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":[{"claim_id":"d03169ec96","claim":"Brian Protiva resigned as member of the Board of Directors at ADTRAN Holdings, Inc..","evidence_excerpt":"On July 31, 2024, Mr. Brian Protiva notified ADTRAN Holdings, Inc. (the “Company”) of his resignation from his role as a member of the Company’s Board of Directors (the “Board”), effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/926282/000095017024089974/0000950170-24-089974-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"member of the Board of Directors"}]}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}