{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-21-002053","form_type":"8-K","ticker":"ADTN","cik":"0000926282","company_name":"ADTRAN Holdings, Inc.","filed_at":"2021-10-07T23:59:59+00:00","discovered_at":"2026-05-14T18:04:16.289696+00:00","generated_at":"2026-06-28T22:26:17.413670+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"ADTRAN SVP of R&D Eduard Scheiterer to retire effective Nov 30, 2021","bullets":["Eduard Scheiterer, SVP of R&D and Managing Director of ADTRAN GmbH, gave notice of retirement.","Retirement effective November 30, 2021; no successor announced yet.","Scheiterer oversaw R&D for ADTRAN and its German subsidiary.","Departure is a planned retirement, not an abrupt termination."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-21-002053","json":"https://secwatch.observer/filing/0000950170-21-002053.json","markdown":"https://secwatch.observer/filing/0000950170-21-002053.md","text":"https://secwatch.observer/filing/0000950170-21-002053.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/926282/000095017021002053/0000950170-21-002053-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/926282/000095017021002053/adtn-20211005.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T22:26:17.413670+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":"70ea7ad177","claim":"Eduard Scheiterer departed as Senior Vice President of Research and Development at ADTRAN Holdings, Inc..","evidence_excerpt":"On October 5, 2021, Eduard Scheiterer, Senior Vice President of Research and Development of ADTRAN, Inc. (the “Company”) and Managing Director of the Company’s wholly-owned German subsidiary, ADTRAN GmbH (the “Subsidiary”), gave notice of his intention to retire from his positions with the Company and the Subsidiary, effective November 30, 2021.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/926282/000095017021002053/0000950170-21-002053-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retire"},{"label":"Role","value":"Senior Vice President of Research and Development"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}