X0306 4 2016-08-16 0 0000926282 ADTRAN INC ADTN 0001327057 McCray Gregory James 901 EXPLORER BOULEVARD HUNTSVILLE AL 35806 1 0 0 0 Common Stock 2016-08-16 4 A 0 12.402 16.35 A 24750.402 D Common Stock 2018-11-15 4 A 0 15.037 13.5594 A 24765.439 D Common Stock 2019-02-22 4 A 0 43.449 14.5857 A 24808.888 D Common Stock 2019-05-17 4 A 0 39.36 16.2 A 24848.248 D Common Stock 2019-08-16 4 A 0 59.801 10.7219 A 24908.049 D Common Stock 2019-12-03 4 A 0 71.78 9.0075 A 24979.829 D Common Stock 2020-03-10 4 A 0 80.239 8.14 A 25060.068 D Reflects 322.068 shares acquired through the automatic reinvestment of dividends paid on the Company's common stock. Amy Moss, by power of attorney 2020-03-17