{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-156741","form_type":"8-K","ticker":"ADTN","cik":"0000926282","company_name":"ADTRAN Holdings, Inc.","filed_at":"2023-05-30T23:59:59+00:00","discovered_at":"2026-05-14T18:03:42.890750+00:00","generated_at":"2026-06-14T12:23:27.847227+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"ADVA CEO Christoph Glingener to step down; Thomas Stanton to assume role July 1, 2023","bullets":["Christoph Glingener steps down as CEO of ADVA effective June 30, 2023; returns to CTO of ADVA and remains CTO of ADTRAN Holdings.","Thomas Stanton, President and CEO of ADTRAN Holdings, becomes CEO of ADVA effective July 1, 2023.","Transition is a planned leadership change at the majority-owned subsidiary."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-156741","json":"https://secwatch.observer/filing/0001193125-23-156741.json","markdown":"https://secwatch.observer/filing/0001193125-23-156741.md","text":"https://secwatch.observer/filing/0001193125-23-156741.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/926282/000119312523156741/0001193125-23-156741-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/926282/000119312523156741/d462466d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-14T12:23:27.847227+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":"2d9d640367","claim":"Thomas Stanton was appointed as Chief Executive Officer of ADVA at ADTRAN Holdings, Inc..","evidence_excerpt":"Thomas Stanton, President and CEO of the Company, will assume the position of CEO of ADVA effective July 1, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/926282/000119312523156741/0001193125-23-156741-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"assume"},{"label":"Role","value":"Chief Executive Officer of ADVA"}],"fact_type":"executive_change"},{"claim_id":"4cafd36ef9","claim":"Christoph Glingener changed role as Chief Technology Officer of ADVA at ADTRAN Holdings, Inc..","evidence_excerpt":"Christoph Glingener, Chief Technology Officer of the Company, will step down as Chief Executive Officer (“CEO”) of ADVA effective June 30, 2023, at which time he will transition to his previous role of Chief Technology Officer (“CTO”) of ADVA.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/926282/000119312523156741/0001193125-23-156741-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"transition"},{"label":"Role","value":"Chief Technology Officer of ADVA"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}