Matthew Lanigan - 03 Jun 2026 Form 4 Insider Report for NPK International Inc. (NPKI)

Reporting relationship: President & CEO, Director
Issuer ticker: NPKI
Reported as of: 03 Jun 2026
Net transaction value: -$2,415,907
SEC form: 4
Accepted by SEC: 05 Jun 2026, 16:22:52 UTC
Prior SEC filing: 03 Jun 2026
Source filing: View source filing
Reporting owner signature: By: M. Celeste Fruge For: Matthew Lanigan

Key filing fact

Matthew Lanigan filed Form 4 for NPK International Inc. (NPKI) on 05 Jun 2026.

Key facts

This page summarizes Matthew Lanigan's Form 4 filing for NPK International Inc. (NPKI).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 05 Jun 2026, 16:22.

Change

Previous filing in this sequence was filed on 03 Jun 2026.
Current net transaction value: -$2,415,907.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001672978 Primary reporting owner

LANIGAN MATTHEW

Relationship: President & CEO, Director
Address: 9320 LAKESIDE BOULEVARD, SUITE 100, THE WOODLANDS
Signature: By: M. Celeste Fruge For: Matthew Lanigan
Signature date: 05 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

NPKI transaction

Common Stock

Sale

Transaction value: $2,415,907
Shares: -167,375
Change %: -40%
Price: $14.43
Shares after: 254,699
Date: 03 Jun 2026
Ownership: Direct
Footnotes: F1, F2

NPKI holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 770,249
Date: 03 Jun 2026
Ownership: by Trust

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 2 footnotes

Footnote F1

The reported sale of 167,375 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 4, 2026.

Footnote F2

The price reported is the weighted average price. These shares were sold in multiple transactions in the open market at prices ranging from $14.29 to $14.56, 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.