| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Waltz William E Jr. | President and CEO, Director | 16100 SOUTH LATHROP AVENUE, HARVEY | /s/ Daniel S. Kelly, Attorney-in-Fact for William E. Waltz, Jr. | 2025-09-03 | 0001674332 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ATKR | Common Stock | Award | $0 | +267 | +0.26% | $0.00 | 104K | Aug 29, 2025 | Direct | F1, F2 |
| holding | ATKR | Common Stock | 23.8K | Aug 29, 2025 | By Trust | F3 |
| Id | Content |
|---|---|
| F1 | Represents dividend equivalent units accrued on unvested restricted stock units ("RSUs"). |
| F2 | Includes unvested restricted stock units ("RSUs") and amounts accrued for dividend equivalent units on such RSUs. |
| F3 | Securities held directly by a trust for which the reporting person's spouse is the beneficiary. The reporting person disclaims beneficial ownership of these securities, except to the extent of his pecuniary interest therein, and this report shall not be deemed to be an admission that the reporting person is, for purposes of Section 16 or any other purpose, the beneficial owner of such securities. |