| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Frederick Douglas J | COO, VP, SECRETARY, Director | 3925 N HASTINGS WAY, EAU CLAIRE | /s/ Ann Werner by Power of Attorney | 05 Jan 2026 | 0001477240 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NPK | Common stock $1.00 par value | Award | $0 | +386 | +4.4% | $0.000000 | 9,142 | 02 Jan 2026 | Direct | F1 |
| holding | NPK | Common stock $1.00 par value | 1,681 | 02 Jan 2026 | 401(k) plan |
| Id | Content |
|---|---|
| F1 | The number stated herein identifies shares of restricted stock granted in accordance with the 2017 Incentive Compensation Plan, which was adopted by the shareholders on May 16, 2017 (the "Plan"). Unless vested earlier, in accordance with the Plan, these restricted stock shares will vest on March 15, 2031. |