| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NPK | Common stock $1.00 par value | Tax liability | $8,545 | -96 | -1.1% | $89.01 | 8,756 | 17 Mar 2025 | Direct | |
| holding | NPK | Common stock $1.00 par value | 1,592 | 17 Mar 2025 | 401(k) plan |