[8-K] NPK International Inc. Reports Material Event

Rhea-AI Filing Summary

NPK International Inc. announced that CFO Gregg S. Piontek will also serve as the company’s principal accounting officer, effective immediately on November 10, 2025. As part of efforts to streamline the organization and cost structure, Douglas L. White, Vice President, Chief Accounting Officer and Treasurer, will step down from the CAO role and remain as a non‑executive employee to assist the transition through Spring 2026.

Piontek has been CFO since October 2011 and previously served as Vice President, Controller and Chief Accounting Officer after joining the company in 2007.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 10, 2025

 NPK International Inc.

(Exact name of registrant as specified in its charter)

Delaware			001-02960			72-1123385
(State or other jurisdiction of incorporation)			(Commission File Number)			(I.R.S. Employer Identification No.)

9320 Lakeside Boulevard,			Suite 100
The Woodlands,			Texas			77381
(Address of principal executive offices)						(Zip Code)

Registrant's telephone number, including area code: (281) 362-6800

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13a-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class			Trading Symbol(s)			Name of each exchange on which registered
Common Stock, $0.01 par value			NPKI			New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On November 10, 2025, NPK International Inc. (the “Company”) announced that Gregg S. Piontek, age 55, the Company’s Senior Vice President and Chief Financial Officer will be assuming the role of the Company’s principal accounting officer effective immediately. As part of the Company’s efforts to streamline the organization and cost structure, Douglas L. White, the Company’s Vice President, Chief Accounting Officer and Treasurer, will step down from his Chief Accounting Officer role on such date and will continue as a non-executive employee to assist in the transition of his role and responsibilities through Spring 2026.

Mr. Piontek has served as the Company’s Chief Financial Officer since October 2011. He joined the Company in April 2007 as Vice President, Controller and Chief Accounting Officer and served in this capacity until October 2011. Before joining the Company, Mr. Piontek served in various financial roles for Stewart & Stevenson Services, Inc. and Stewart & Stevenson, LLC from June 2001 through March 2007, including Divisional Controller, Assistant Corporate Controller and as Vice President and Chief Accounting Officer. Prior to that, Mr. Piontek served in various financial roles at General Electric, CNH Global N.V. and Deloitte & Touche LLP.

Item 9.01 Financial Statements and Exhibits. 

(d) Exhibits.

Exhibit No.						Description
104						Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. 

						NPK International Inc.
						(Registrant)
Date:			November 12, 2025			By:			/s/ M. Celeste Frugé
									M. Celeste Frugé
									VP, General Counsel, Chief Compliance Officer & Corporate Secretary

FAQ

What did NPKI announce in its 8-K?

The company named CFO Gregg S. Piontek as its principal accounting officer, effective immediately on November 10, 2025.

Who is assuming the principal accounting officer role at NPKI?

Gregg S. Piontek, the company’s Senior Vice President and CFO, is assuming the principal accounting officer role.

What is changing for Douglas L. White at NPKI (NPKI)?

Douglas L. White will step down from his Chief Accounting Officer role and continue as a non‑executive employee to assist with the transition through Spring 2026.

Why is NPK International making this leadership change?

The change is part of efforts to streamline the organization and cost structure.

When is the leadership change effective at NPKI?

The change is effective immediately as of November 10, 2025.

How long has Gregg S. Piontek served as CFO of NPKI?

He has served as CFO since October 2011 and previously held roles including Vice President, Controller and Chief Accounting Officer.