X0508 4 2023-08-07 0 0000080420 POWELL INDUSTRIES INC POWL 0001205075 HONEYCUTT MILBURN E 8550 MOSLEY ROAD HOUSTON TX 77075 0 1 0 0 Vice Pres, Corp Controller 0 Common Stock 2023-08-07 2023-08-07 4 S 0 6474 80.54 D 28742 D Common Stock 2023-08-07 2023-08-07 4 S 0 3767 81.33 D 24975 D Common Stock 2023-08-07 2023-08-07 4 S 0 600 82.39 D 24375 D Common Stock 2023-08-07 2023-08-07 4 S 0 1159 83.55 D 23216 D Common Stock 399 I 401(k) Shares The price reported in Column 4 is a weighted average price; shares were sold in multiple transactions. Reporting range is $80.00-$80.97, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set forth in footnote 1. Includes shares that have a time-based vesting provision. The price reported in Column 4 is a weighted average price; shares were sold in multiple transactions. Reporting range is $81.01-$81.90, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set forth in footnote 3. The price reported in Column 4 is a weighted average price; shares were sold in multiple transactions. Reporting range is $82.06-$83.04, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set forth in footnote 4. The price reported in Column 4 is a weighted average price; shares were sold in multiple transactions. Reporting range is $83.22-$83.75, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set forth in footnote 5. Michael W. Metcalf, Power of Attorney for Milburn E. Honeycutt 2023-08-08