SEC Form 4 · accession 0001672978-26-000004
NPK International Inc. · NPKI
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Matthew Lanigan
Officer — President & CEO · Director
Period of report
Jun 1, 2026
Accepted (ET)
Jun 3, 2026 · 6:55 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0000071829
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Jun 1, 2026 | F | 22,232 | $14.31 | D | 389,203 | D | |
| Common StockF1 | Jun 1, 2026 | F | 27,894 | $14.31 | D | 361,309 | D | |
| Common StockF1 | Jun 1, 2026 | F | 39,423 | $14.31 | D | 321,886 | D | |
| Common StockF2 | Jun 1, 2026 | M | 100,188 | $0.00 | A | 422,074 | D | |
| Common Stock | holding | — | — | — | 770,249 | I | by Trust |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF2,F3 | $0.00 | Jun 1, 2026 | M | 100,188 | D | — | — | Common Stock | 100,188 | 0 | D |
Explanation of responses
- F1Represents shares withheld to satisfy tax withholding obligations upon the vesting of restricted stock units.
- F2The restricted stock units vest and convert into shares on a one-for-one basis.
- F3Grant of restricted stock units that vest in one-third increments on June 1 of each subsequent year after grant and settle in shares.