# EDGAR Filing Document

**Accession Number:** 0000071829
**File Stem:** 0000071829-26-000019
**Filing Date:** 2026-4
**Character Count:** 2505
**Document Hash:** f35a017dfa0978e81859b318a02d45c7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000071829-26-000019.hdr.sgml**: 20260409

**ACCESSION NUMBER**: 0000071829-26-000019

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 4

**FILED AS OF DATE**: 20260409

**DATE AS OF CHANGE**: 20260409

**FILER**: 

**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

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-02960
- **FILM NUMBER:** 26851805

**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

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**SCHEDULE 14A**

**PROXY STATEMENT PURSUANT TO SECTION 14(a) of THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.&nbsp;&nbsp;&nbsp;&nbsp;)**

Filed by the Registrant&nbsp;&nbsp;&nbsp;&nbsp; [X]

Filed by a Party other than the Registrant&nbsp;&nbsp;&nbsp;&nbsp; [ ]

Check the appropriate box:

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| | |
|:---|:---|
| | Preliminary Proxy Statement |
| | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| | Definitive Proxy Statement |
| X | Definitive Additional Materials |
|  | Soliciting Material Pursuant to §240.14a-12 |

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![npklogo.jpg](npklogo.jpg)

**NPK International Inc.**

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than Registrant)

Payment of Filing Fee (Check the appropriate box):

---

| | |
|:---|:---|
| X | No fee required. |
|  | Fee paid previously with preliminary materials. |
|  | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11. |

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