James Barton was named Executive Vice President, Commercial Growth of NPK International Inc., effective September 22, 2026. As of November 6, 2026, NPK International Inc. has reported 3 leadership change filings to the SEC under Item 5.02 of Form 8-K, from July 28, 2026 to September 14, 2026, naming 3 appointments and 1 departure (Form 8-K, September 14, 2026).
NPK International Inc. named a new Executive Vice President, Commercial Growth on Sep 14. 30 companies changed executives this week.
Companies that just changed executives, and the new executive. Before you unlock: the company, the change and what is inside. After: the executive named with their role, how to reach the company, and a person's email only when we found one.
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| Bain Capital Specialty Finance, Inc. | named a new Director | |
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| LASE Corp. | named a new Director | |
| Century Communities, Inc. | named a new Executive Chairman |
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Key facts
- · In / out: In · Person: James Barton · Role: Executive Vice President, Commercial Growth · Effective: 2026-09-22 · 8-K, 2026-09-14
- · In / out: Out · Person: Gregg Piontek · Role: Chief Financial Officer · 8-K, 2026-09-02
- · In / out: In · Person: Kristen J. Pederson · Role: Director · Effective: 2026-07-28 · 8-K, 2026-07-28
NPK International Inc. reported changes in 3 filings among its directors and officers to the SEC on Form 8-K, Item 5.02, from 2026-07-28 to 2026-09-14. They name 4 people, with 3 appointments and 1 departure. Every row below is cited to the filing it comes from, and this page adds each new change as NPK International Inc. files it.
Also on the record for NPK International Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 30, 2026 | Stake report, Schedule 13G/A, by Vanguard Capital Management | 4.97% of the class | 5%+ stakes | Source |
| July 31, 2026 | Stake report, Schedule 13G, by Vanguard Capital Management | 5.01% of the class | 5%+ stakes | Source |
| July 29, 2026 | Stake report, Schedule 13G/A, by BlackRock, Inc. | 8.4% of the class | 5%+ stakes | Source |
| April 9, 2026 | Stake report, Schedule 13G/A, by Dimensional Fund Advisors LP | 4.7% of the class | 5%+ stakes | Source |
| March 27, 2026 | Stake report, Schedule 13G/A, by The Vanguard Group | — | 5%+ stakes | Source |
| November 14, 2025 | Stake report, Schedule 13G/A, by Ameriprise Financial, Inc. | 6.2% of the class | 5%+ stakes | Source |
| October 9, 2025 | Stake report, Schedule 13G/A, by Dimensional Fund Advisors LP | 5.7% of the class | 5%+ stakes | Source |
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More on NPK International Inc. and the records around it.
NPK International Inc. elsewhere on the record
Companies that share a holder
- Ameriprise Financial, Inc. also filed stake reports on 65 other companies: Universal Electronics Inc. (Sep 2026), America's Car-Mart, Inc. (Aug 2026), Ampco-Pittsburgh Corporation (Aug 2026)
- Dimensional Fund Advisors LP also filed stake reports on 366 other companies: Acadia Healthcare Co Inc (Oct 2026), ADT Inc (Oct 2026), AGCO Corp (Oct 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
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Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-09-14 | In | Executive Vice President, Commercial Growth | 2026-09-22 | 8-K, 2026-09-14 | |
| 2026-09-02 | Out | Chief Financial Officer | 8-K, 2026-09-02 | ||
| 2026-09-02 | In | Chief Accounting Officer | 2026-08-31 | 8-K, 2026-09-02 | |
| 2026-07-28 | In | Director | 2026-07-28 | 8-K, 2026-07-28 |
Who leads NPK International Inc., as last reported?
For each role that changed in the filings below, the most recent change reported. A role that did not change in these filings is not listed.
- Executive Vice President, Commercial Growth: James Barton, appointed, effective 2026-09-22 (filed 2026-09-14).
- Chief Financial Officer: Gregg Piontek, departure reported (filed 2026-09-02). No successor is named in these filings.
- Chief Accounting Officer: Matthew Warren, appointed, effective 2026-08-31 (filed 2026-09-02).
- Director: Kristen J. Pederson, appointed, effective 2026-07-28 (filed 2026-07-28).
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Find candidates like Commercial Growth at NPK International Inc.Every change, in the filing's words
Appointed: James Barton, Executive Vice President, Commercial Growth, effective 2026-09-22
On September 11, 2026, the Board of Directors (the "Board") of NPK International Inc. (the "Company") appointed James Barton as Executive Vice President, Commercial Growth & Operations of the Company effective as of September 22, 2026, succeeding Lori Briggs, who will cease to serve in such role on September 14, 2026.
- Mr. Barton brings more than two decades of leadership experience in strategic sales, account management, service operations, manufacturing and growth execution.
- He has most recently served as the President of Clear Water Services, a wholly-owned subsidiary of Tidal Vision, in which role he led growth initiatives, operational improvements, and integration efforts that strengthened revenue, margins, and EBITDA performance.
- He also previously held senior leadership roles with ZECO, Mayco Wellchem, and Baker Hughes, and holds an MBA in Corporate Entrepreneurship from Syracuse University and a B.A. in Communication and Marketing from Louisiana State University.
Departing: Gregg Piontek, Chief Financial Officer
Following nearly 20 years of service to NPK International Inc. (the "Company"), on August 28, 2026, Gregg Piontek, Senior Vice President and Chief Financial Officer ("CFO"), notified the Company of his intention to retire from the position of CFO on or before August 31, 2027, and upon the Board's appointment of a successor Chief Financial Officer.
Appointed: Matthew Warren, Chief Accounting Officer, effective 2026-08-31
In connection with Mr. Piontek's pending retirement, the Board appointed Matthew Warren as the Company's Chief Accounting Officer ("CAO") effective as of August 31, 2026.
- Upon his retirement from the position, Mr. Piontek will be retained to support the CFO transition.
- As part of NPK's planned succession process, NPK has initiated a formal search for Mr. Piontek's successor in consultation with a global executive search firm.
- Mr. Warren succeeds Mr. Piontek as the Company's principal accounting officer, who ceased to serve in such role upon Mr. Warren's appointment.
- In connection with his appointment as CAO, Mr. Warren's annual base salary was increased to $283,000 and his target annual cash incentive opportunity was increased to 40% of his base salary.
- Mr. Warren is eligible to participate in the Company's Equity Incentive Plan and will serve as a "Tier 3" participant in each of the Company's U.S. Executive Severance Plan and Change in Control Plan.
- Prior to his appointment as CAO, Mr. Warren, age 44, has served as the Company's Vice President of Accounting & Financial Reporting since April 2026.
- He served as the Company's Corporate Controller from June 2022 through April 2026 and as Director of Financial Reporting and Assistant Corporate Controller from April 2018 through June 2022.
- Mr. Warren is a Certified Public Accountant, began his career at Deloitte & Touche, and has a Masters in Professional Accounting and Bachelors of Business Administration from the University of Texas at Austin.
Appointed: Kristen J. Pederson, Director, effective 2026-07-28
On July 28, 2026, the Board of Directors (the "Board") of NPK International Inc. ("the Company") elected to increase the size of the Board from seven directors to eight directors effective July 28, 2026 and appointed Ms. Kristen J. Pederson to fill the resulting vacancy.
- Ms. Pederson, age 62, has more than 30 years of corporate strategy, financial and corporate governance experience.
- Ms. Pederson served as a partner at Ernst & Young LLP ("EY") from November 2014 until her retirement in December 2024, most recently leading EY's Center for Board Matters, the firm's corporate governance and board advisory practice, and previously serving as the leader of EY's Americas Strategy Consulting practice.
- Earlier in her career, Ms. Pederson served as a Vice President at International Business Machines Corporation, where she led global strategic and technology transformation practices, and as a partner at PricewaterhouseCoopers, where she led various strategy consulting practices.
- Ms. Pederson has served as a director of SOBR Safe, Inc. (Nasdaq: SOBR) since May 2025, where she serves as chair of the nominating and corporate governance committee, and as a director of Eagle Bancorp, Inc. (Nasdaq: EGBN) and its subsidiary, EagleBank, since September 2025, where she serves as a member of the governance and nominating committee and the compensation committee.
- Ms. Pederson also serves as chair of the audit committee of the NFL Alumni Association, as a member of the board of the Colorado chapter of the National Association of Corporate Directors ("NACD"), and as a member of the NASDAQ Governance Council.
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.