ADTRAN Holdings, Inc. reports fourth quarter and full year 2025 financial results

HUNTSVILLE, Ala.--(BUSINESS WIRE)--ADTRAN Holdings, Inc. (NASDAQ: ADTN and FSE: QH9) (“ADTRAN Holdings” “ADTRAN” or the “Company”) today announced its unaudited financial results for the fourth quarter ended December 31, 2025. Revenue: $291.6 million, up 20.1% year-over-year. GAAP gross margin of 39.0%; Non-GAAP gross margin of 42.5%; up 213 and 122 basis points year-over-year, respectively. Operating margin: GAAP operating margin of 1.5%; non-GAAP operating margin of 6.4%. Net cash provided by