| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Kelly Daniel S | VP, General Counsel and Sec. | 16100 SOUTH LATHROP AVENUE, HARVEY | /s/ Daniel S. Kelly | 17 Nov 2025 | 0001674314 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ATKR | Common Stock | Tax liability | $25,543 | -394 | -1.4% | $64.83 | 26,980 | 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. |