{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-24-020613","form_type":"8-K","ticker":"ADTN","cik":"0000926282","company_name":"ADTRAN Holdings, Inc.","filed_at":"2024-02-27T23:59:59+00:00","discovered_at":"2026-05-14T18:03:27.319936+00:00","generated_at":"2026-06-05T14:02:05.122381+00:00","sec_items":["2.02","7.01","9.01"],"event_type":"earnings","sentiment":"negative","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Adtran Q4 prelim: GAAP net loss $109.9M, non-GAAP EPS -$1.09","bullets":["Preliminary Q4 revenue $225.5M; non-GAAP operating margin -1.4% (upper end of -7% to 0% guidance).","GAAP gross margin 34.8% (+483 bps YoY); non-GAAP gross margin 41.9% (+277 bps YoY).","GAAP operating expenses down 7.6% sequentially; non-GAAP operating expenses down 15.1% sequentially.","Preliminary diluted loss per share: GAAP -$1.40, non-GAAP -$1.09; inventory write-off $3.3M vs $21M in Q3.","Management cites macro headwinds and elevated customer inventories; sees unchanged fiber demand landscape."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-24-020613","json":"https://secwatch.observer/filing/0000950170-24-020613.json","markdown":"https://secwatch.observer/filing/0000950170-24-020613.md","text":"https://secwatch.observer/filing/0000950170-24-020613.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/926282/000095017024020613/0000950170-24-020613-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/926282/000095017024020613/adtn-20240226.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-05T14:02:05.122381+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":"2c29a5af9b5711f0fe4e024e7aa3bbdf2e1a3bb3","claim":"ADTRAN Holdings, Inc. reported the fourth quarter of 2023 results: revenue $225.5 million.","evidence_excerpt":"ADTRAN Holdings, Inc. reports preliminary fourth quarter 2023 financial results • Preliminary Q4 revenue at $225.5 million and at mid-point of guidance","evidence_source":"SEC 8-K Item 2.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/926282/000095017024020613/0000950170-24-020613-index.htm","confidence":0.95,"family_label":"Earnings Releases","details":[{"label":"Period","value":"the fourth quarter of 2023"},{"label":"Revenue","value":"$225.5 million"},{"label":"Result","value":"preliminary results"}],"fact_type":"earnings_release"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}