{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-21-004926","form_type":"8-K","ticker":"ADTN","cik":"0000926282","company_name":"ADTRAN Holdings, Inc.","filed_at":"2021-11-29T23:59:59+00:00","discovered_at":"2026-05-14T18:04:16.290778+00:00","generated_at":"2026-06-28T05:15:01.841007+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"ADTRAN SVP of R&D Scheiterer to retire Nov 30; Termination Agreement signed Nov 26","bullets":["Eduard Scheiterer's retirement effective Nov 30, 2021; entered Termination Agreement on Nov 26.","Receives prorated annual salary (EUR 275,200.84), car/commuting allowances, and 2021 variable pay.","Unvested RSUs accelerate; all unvested PSUs forfeited upon departure.","Mutual release of claims; potential future consulting arrangement mentioned.","Scheiterer resigns all roles including MD of ADTRAN GmbH; ADTRAN to update SEC designation."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-21-004926","json":"https://secwatch.observer/filing/0000950170-21-004926.json","markdown":"https://secwatch.observer/filing/0000950170-21-004926.md","text":"https://secwatch.observer/filing/0000950170-21-004926.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/926282/000095017021004926/0000950170-21-004926-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/926282/000095017021004926/adtn-20211126.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T05:15:01.841007+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":"469b30a895","claim":"Eduard Scheiterer retired as Senior Vice President of Research and Development of the Company and Managing Director of the Company’s wholly-owned German subsidiary, ADTRAN GmbH at ADTRAN Holdings, Inc..","evidence_excerpt":"Eduard Scheiterer, Senior Vice President of Research and Development of the Company and Managing Director of the Company’s wholly-owned German subsidiary, ADTRAN GmbH (the “Subsidiary”), had notified the Company of his intent 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/926282/000095017021004926/0000950170-21-004926-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"Senior Vice President of Research and Development of the Company and Managing Director of the Company’s wholly-owned German subsidiary, ADTRAN GmbH"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}