| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Pregenzer John W | COO & President, Electrical | 16100 S LATHROP AVENUE, HARVEY | /s/Daniel S. Kelly, Attorney-in-Fact for John W. Pregenzer | 17 Nov 2025 | 0001825727 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ATKR | Common Stock | Tax liability | $34,554 | -533 | -1.2% | $64.83 | 43,761 | 13 Nov 2025 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | Securities withheld to pay withholding taxes on vested restricted stock units exempt under Rule 16b-3. |
| F2 | Includes unvested restricted stock units ("RSUs") and amounts accrued for dividend equivalent units on such RSUs. |