| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NPK | Common stock $1.00 par value | Tax liability | $2,532 | -34 | -1.9% | $74.48 | 1,784 | 15 Mar 2023 | Direct | |
| holding | NPK | Common stock $1.00 par value | 763 | 15 Mar 2023 | 401(k) plan |