0001672978-26-000006.txt : 20260605 0001672978-26-000006.hdr.sgml : 20260605 20260605162252 ACCESSION NUMBER: 0001672978-26-000006 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260603 FILED AS OF DATE: 20260605 DATE AS OF CHANGE: 20260605 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: LANIGAN MATTHEW CENTRAL INDEX KEY: 0001672978 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-02960 FILM NUMBER: 261069437 MAIL ADDRESS: STREET 1: 9320 LAKESIDE BOULEVARD STREET 2: SUITE 100 CITY: THE WOODLANDS STATE: TX ZIP: 77381 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: NPK International Inc. CENTRAL INDEX KEY: 0000071829 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-MISCELLANEOUS EQUIPMENT RENTAL & LEASING [7350] ORGANIZATION NAME: 07 Trade & Services EIN: 721123385 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 9320 LAKESIDE BOULEVARD STREET 2: SUITE 100 CITY: THE WOODLANDS STATE: TX ZIP: 77381 BUSINESS PHONE: 281-362-6800 MAIL ADDRESS: STREET 1: 9320 LAKESIDE BOULEVARD STREET 2: SUITE 100 CITY: THE WOODLANDS STATE: TX ZIP: 77381 FORMER COMPANY: FORMER CONFORMED NAME: NEWPARK RESOURCES INC DATE OF NAME CHANGE: 19920703 FORMER COMPANY: FORMER CONFORMED NAME: NEW PARK MINING CO DATE OF NAME CHANGE: 19720828 4 1 edgardoc.xml PRIMARY DOCUMENT X0609 4 2026-06-03 0 0000071829 NPK International Inc. NPKI 0001672978 LANIGAN MATTHEW false 9320 LAKESIDE BOULEVARD SUITE 100 THE WOODLANDS TX 77381 1 1 0 0 President & CEO 1 Common Stock 2026-06-03 4 S 0 167375 14.4341 D 254699 D Common Stock 770249 I by Trust 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. 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. By: M. Celeste Fruge For: Matthew Lanigan 2026-06-05