| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NPK | Common stock $1.00 par value | Tax liability | $30,256 | -380 | -5.3% | $79.62 | 6,762 | 16 Mar 2022 | Direct | |
| holding | NPK | Common stock $1.00 par value | 1,172 | 16 Mar 2022 | 401(k)plan |