X0306 4 2022-08-23 0 0000926282 ADTRAN Holdings, Inc. ADTN 0001930886 Protiva Brian 901 EXPLORER BOULEVARD HUNTSVILLE AL 35806 1 1 0 0 CEO of ADVA Common Stock 2022-08-23 4 M 0 17668 10.58 A 348277.14 D Common Stock 2022-08-23 4 S 0 17668 24.64 D 330609.14 D Common Stock 2022-08-23 4 M 0 8833 7.04 A 339442.14 D Common Stock 2022-08-23 4 S 0 8833 24.64 D 330609.14 D Common Stock 19361.03 I By spouse Stock Option 10.58 2022-08-23 4 M 0 17668 0 D 2023-05-14 Common Stock 17668 0 D Stock Option 7.04 2022-08-23 4 M 0 8833 0 D 2025-05-14 Common Stock 8833 52997 D Stock Option 19.08 2029-05-14 Common Stock 88326 88326 D Stock Option 12.17 2028-05-14 Common Stock 49464 49464 D Stock Option 7.01 2027-05-14 Common Stock 41220 41220 D The options granted to the reporting person vested/vests on the fourth anniversary of the date of grant. Michael Foliano, by power of attorney 2022-08-25