| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NPK | Common stock $1.00 par value | Tax liability | $2,206 | -29 | -1.6% | $76.06 | 1,755 | 15 Mar 2024 | Direct | |
| holding | NPK | Common stock $1.00 par value | 880 | 15 Mar 2024 | 401(k) plan |