DIMENSIONAL FUND ADVISORS LP 13D and 13G filings for NPK International Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-04-09 1:42 pm Sale | 2026-03-31 | 13G | NPK INTERNATIONAL INC. NPKI | DIMENSIONAL FUND ADVISORS LP | 3,983,658 4.700% | -813,800 (-16.96%) | Filing |
| 2025-10-09 1:48 pm Sale | 2025-09-30 | 13G | NPK INTERNATIONAL INC. NPKI | DIMENSIONAL FUND ADVISORS LP | 4,797,458 5.700% | -1,356,006 (-22.04%) | Filing |
| 2024-02-09 09:59 am Purchase | 2024-02-14 | 13G | NPK INTERNATIONAL INC. NPKI | DIMENSIONAL FUND ADVISORS LP | 6,153,464 7.200% | 1,966,430 (+46.96%) | Filing |
| 2022-02-08 3:53 pm Sale | 2022-02-14 | 13G | NPK INTERNATIONAL INC. NPKI | DIMENSIONAL FUND ADVISORS LP | 4,187,034 4.500% | -480,334 (-10.29%) | Filing |