SEC Form 4 · accession 0001880836-26-000004
NPK International Inc. · NPKI
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Lori Briggs
Officer — VP & President, Ind. Solutions
Period of report
Jun 1, 2026
Accepted (ET)
Jun 3, 2026 · 6:51 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
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 | 5,401 | $14.31 | D | 257,950 | D | |
| Common StockF1 | Jun 1, 2026 | F | 9,577 | $14.31 | D | 248,373 | D | |
| Common StockF1 | Jun 1, 2026 | F | 6,777 | $14.31 | D | 241,596 | D | |
| Common StockF2 | Jun 1, 2026 | M | 24,340 | $0.00 | A | 265,936 | D | |
| Common StockF3,F4 | Jun 2, 2026 | S | 10,446 | $14.5776 | D | 255,490 | D |
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,F5 | $0.00 | Jun 1, 2026 | M | 24,340 | D | — | — | Common Stock | 24,340 | 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.
- F3The reported sale of 10,446 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 15, 2025.
- F4The price reported is the weighted average price. These shares were sold in multiple transactions in the open market at prices ranging from $14.33 to $14.74, inclusive. The reporting person undertakes to provide to NPK International Inc., any security holder of NPK International Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.
- F5Grant of restricted stock units that vest in one-third increments on June 1 of each subsequent year after grant and settle in shares.