---
schema_version: "secwatch.filing_event.v1"
accession: "0000071829-26-000047"
form_type: "8-K"
ticker: "NPKI"
cik: "0000071829"
company_name: "NPK International Inc."
filed_at: "2026-09-02T20:25:57+00:00"
generated_at: "2026-09-02T20:27:11.578853+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# NPK CFO Gregg Piontek to retire by Aug 31 2027; Matthew Warren named CAO

## Summary
- CFO Gregg Piontek to retire on/before Aug 31, 2027, or upon successor appointment; will support transition.
- Matthew Warren appointed CAO effective Aug 31, 2026, succeeding Piontek as principal accounting officer.
- Warren's base salary raised to $283,000; target annual cash incentive 40% of base; Tier 3 severance/CIC participant.
- Warren previously VP Accounting & Financial Reporting since Apr 2026; Corporate Controller before; CPA, ex-Deloitte.
- Company states CFO transition won't affect previously announced financial outlook or strategic priorities.

## SEC filing metadata
- accession: 0000071829-26-000047
- form_type: 8-K
- ticker: NPKI
- cik: 0000071829
- company_name: NPK International Inc.
- filed_at: 2026-09-02T20:25:57+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/71829/000007182926000047/0000071829-26-000047-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/71829/000007182926000047/nr-20260828.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000071829-26-000047
- JSON: https://secwatch.observer/filing/0000071829-26-000047.json
- Plain text: https://secwatch.observer/filing/0000071829-26-000047.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.