Roderick A. Larson - 20 May 2026 Form 4 Insider Report for NPK International Inc. (NPKI)

Reporting relationship: Director
Issuer ticker: NPKI
Reported as of: 20 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 21 May 2026, 17:14:34 UTC
Prior SEC filing: 19 May 2026
Next SEC filing: 05 Oct 2026
Source filing: View source filing
Reporting owner signature: By: M. Celeste Fruge For: Roderick A. Larson

Key filing fact

Roderick A. Larson filed Form 4 for NPK International Inc. (NPKI) on 21 May 2026.

Key facts

This page summarizes Roderick A. Larson's Form 4 filing for NPK International Inc. (NPKI).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 21 May 2026, 17:14.

Change

Previous filing in this sequence was filed on 19 May 2026.
Current net transaction value: $0.

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 0001550150 Primary reporting owner

LARSON RODERICK A.

Relationship: Director
Address: 9320 LAKESIDE BOULEVARD, SUITE 100, THE WOODLANDS
Signature: By: M. Celeste Fruge For: Roderick A. Larson
Signature date: 21 May 2026

Reported non-derivative transactions

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

NPKI transaction

Common Stock

Award

Transaction value
Shares: +8,558
Change %: +57%
Price: $0.000000^*
Shares after: 23,655
Date: 20 May 2026
Ownership: Direct
Footnotes: F1

NPKI holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 233,651
Date: 20 May 2026
Ownership: LFV, LP
Footnotes: F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The shares will vest on the earlier of the first anniversary of the date of grant or the day prior to the next annual stockholders meeting.

Footnote F2

The reporting person disclaims beneficial ownership of these shares held indirectly through this entity except to the extent of the pecuniary interest held therein.