4processed

Form 4 — Insider Transaction

NPK International Inc.(NPKI)

Filing Date

May 19, 2026

Accepted

May 19, 2026

Accession No.

0001975485-26-000009

CIK

0000071829

Insider Transactions

InsiderTitleTypeSharesPriceValueOwned AfterSecurityDate
Fruge Mary CelesteVP, General CounselOther18.0K$0283.2KCommon StockMay 19, 2026