ADTRAN (ADTN) - 2025 Q4 - Annual Results

EXHIBIT 99.1 https://files.reportify.cc/media/production/ ADTRAN Holdings, Inc. announces certain preliminary fourth quarter and full year 2025 results Huntsville, Alabama, USA. – January 21, 2026 — ADTRAN Holdings, Inc. (NASDAQ: ADTN and FSE: QH9) ("ADTRAN Holdings" or the "Company") today announced preliminary unaudited revenue, as well as GAAP and non-GAAP operating margin, for the fiscal quarter and year ended December 31, 2025. This press release announcement is being provided due to German ad hoc disc ...