X0306 4 2022-10-01 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 2022-10-01 2022-10-01 4 A 0 10000 0.00 A 29767 D Common Stock 2022-10-01 2022-10-01 4 F 0 733 21.26 D 29034 D Common Stock 2022-10-01 2022-10-01 4 A 0 6300 0.00 A 35334 D Shares granted under the Company's long-term equity compensation plan (time-vesting restricted stock unit agreement) which will equally vest on the second and third anniversaries of October 1, 2022, subject to the participant's continuous service with the Company. Includes shares that have a time-based vesting provision. Represents the average of the high and low stock price on 09/30/2022. Represents time-based RSU awards that will vest in three equal annual installments on the first, second and third anniversaries of October 1, 2022, subject to the Reporting Person's continued employment with the Company. Michael W. Metcalf 2022-10-04