Matthew Lanigan - 03 Sep 2025 Form 4 Insider Report for NPK International Inc. (NPKI)

Reporting relationship: President & CEO, Director
Issuer ticker: NPKI
Reported as of: 03 Sep 2025
Net transaction value: -$16,440
SEC form: 4
Accepted by SEC: 04 Sep 2025, 19:31:11 UTC
Prior SEC filing: 26 Aug 2025
Next SEC filing: 06 Oct 2025
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 04 Sep 2025.

Key facts

This page summarizes Matthew Lanigan's Form 4 filing for NPK International Inc. (NPKI).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 04 Sep 2025, 19:31.

Change

Previous filing in this sequence was filed on 26 Aug 2025.
Current net transaction value: -$16,440.

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: 04 Sep 2025

Reported non-derivative transactions

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

NPKI transaction

Common Stock

Options Exercise

Transaction value: $4,320
Shares: +1,000
Change %: +0.09%
Price: $4.32
Shares after: 1,096,913
Date: 03 Sep 2025
Ownership: Direct

NPKI transaction

Common Stock

Sale

Transaction value: $10,380
Shares: -1,000
Change %: -0.09%
Price: $10.38
Shares after: 1,095,913
Date: 03 Sep 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

NPKI transaction Derivative

Non-Qualified Stock Option (right to buy)

Options Exercise

Transaction value: $10,380
Shares: -1,000
Change %: -100%
Price: $10.38
Shares after: 0
Date: 03 Sep 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,000
Exercise price: $4.32

^* 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 1 footnote

Footnote F1

The reported sale of 1,000 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 23, 2025.