secwatch.observer — SEC 8-K summary ====================================== Issuer: ADTRAN Holdings, Inc. (ADTN) CIK: 0000926282 Form: 8-K Filed at: 2025-05-28T23:59:59+00:00 Accession: 0000950170-25-077995 Event type: other_material Sentiment: negative Materiality: 0.75 Item codes: 2.02, 9.01 LLM model: deepseek-v4-flash:cloud@v2 ADTRAN Holdings restates 2024 and 2023 financials; updates Q1 2025 non-GAAP measures -------------------------------------------------------------------------------- - Restated consolidated financial statements for fiscal years 2024 and 2023 and interim periods in 2024. - Filed Q1 2025 Form 10-Q on May 20, providing final Q1 2025 financials. - Updated non-GAAP measures and investor presentation attached as exhibits to this 8-K. - Supersedes preliminary financial information from May 7, 2025 press release. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/926282/000095017025077995/0000950170-25-077995-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/926282/000095017025077995/adtn-20250527.htm HTML page: https://secwatch.observer/filing/0000950170-25-077995 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer