| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Stienessen Joseph G | Director | 3925 N HASTINGS WAY, EAU CLAIRE | /s/ Ann Werner by Power of Attorney | 02 Jan 2026 | 0001343050 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NPK | Common stock $1.00 par value | Award | $0 | +100 | +5% | $0.000000 | 2,086 | 02 Jan 2026 | SEP IRA |