SEC Form 4 · accession 0002152870-26-000010
NPK International Inc. · NPKI
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Matthew James Warren
Officer — Chief Accounting Officer
Period of report
Sep 9, 2026
Accepted (ET)
Sep 10, 2026 · 6:22 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,F2 | Sep 9, 2026 | S | 2,991 | $13.4112 | D | 51,439 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The reported sale of 2,991 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 17, 2025.
- F2The price reported is the weighted average price. These shares were sold in multiple transactions in the open market at prices ranging from $13.33 to $13.51, 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.