| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Lowe LeAngela W. | VP, Chief HR Officer | 16100 S. LATHROP AVENUE, HARVEY | /s/ Daniel S. Kelly, Attorney-in-Fact for LeAngela W. Lowe | 17 Nov 2025 | 0001777650 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ATKR | Common Stock | Tax liability | -$22.2K | -343 | -1.12% | $64.83 | 30.4K | 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. |