{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-246498","form_type":"8-K","ticker":"ADTN","cik":"0000926282","company_name":"ADTRAN Holdings, Inc.","filed_at":"2023-09-29T23:59:59+00:00","discovered_at":"2026-05-14T18:03:37.060506+00:00","generated_at":"2026-06-10T07:19:11.996604+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Director Johanna Hey resigns from ADTRAN Holdings board effective Sept 30, 2023","bullets":["Johanna Hey notified the Board on Sept 25, 2023 of her resignation effective Sept 30, 2023.","Resignation due to family and medical reasons; no disagreement with the Company or Board.","Ms. Hey's departure reduces board size; no replacement named in the filing."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-246498","json":"https://secwatch.observer/filing/0001193125-23-246498.json","markdown":"https://secwatch.observer/filing/0001193125-23-246498.md","text":"https://secwatch.observer/filing/0001193125-23-246498.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/926282/000119312523246498/0001193125-23-246498-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/926282/000119312523246498/d479192d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-10T07:19:11.996604+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":"8a6b291186","claim":"Johanna Hey resigned as Director at ADTRAN Holdings, Inc..","evidence_excerpt":"On September 25, 2023, Johanna Hey notified the Board of Directors (the “Board”) of ADTRAN Holdings, Inc. (the “Company”) of her intent to resign from her role as a director of the Company, effective as of September 30, 2023, for family and medical reasons.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/926282/000119312523246498/0001193125-23-246498-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}