X0306 4 2021-10-01 0 0000080420 POWELL INDUSTRIES INC POWL 0001760055 METCALF MICHAEL WILLIAM 8550 MOSLEY ROAD HOUSTON TX 77075 0 1 0 0 Exec Vice President Common Stock 2021-10-01 2021-10-01 4 F 0 699 25.01 D 10367 D Common Stock 2021-10-01 2021-10-01 4 A 0 5100 0.00 A 15467 D Represents the average of the high and low stock price on 09/30/2021. Includes shares that have a time-based vesting provision of three equal installments from the date of grant. Represents time-based RSU awards that will vest in three equal annual installments on the first, second and third anniversaries of October 1, 2021, subject to the Reporting Person's continued employment with the Company. Michael W. Metcalf 2021-10-04