| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| McKertcher Terry B | Vice President, Operations | 8550 MOSLEY ROAD, HOUSTON | Michael W. Metcalf, Power of Attorney for Terry B. McKertcher | 08 Dec 2025 | 0002025133 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | POWL | Common Stock | Sale | $487,707 | -1,433 | -15% | $340.34 | 8,100 | 08 Dec 2025 | Direct | F1, F2 |
| transaction | POWL | Common Stock | Sale | $227,634 | -667 | -8.2% | $341.28 | 7,433 | 08 Dec 2025 | Direct | F2, F3 |
| Id | Content |
|---|---|
| F1 | The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $340.00-341.00, 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 for in this footnote. |
| F2 | Includes shares that have a time-based vesting provision. |
| F3 | The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $341.03-341.47, 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 for in this footnote. |