NPK International Inc.
NPK International Inc. (NPKI) Stock Ownership
Latest 13F position summary is not yet available — breakdown and tables fill in after filings publish (typically ~45 days after quarter end).
SEC 13F · FMP · NPKI · as of —
Ownership Breakdown
Institutional data for this period is not yet available. SEC Form 13F filings are typically published 45 days after quarter end.
No institutional data available for this period.
Insider Buying vs Selling
NPKI insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
14
Buy transactions
21
Sell transactions
0.67
Buy/Sell ratio
$1M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
LANIGAN MATTHEW President & CEO | Jun 3, 2026 | Sale | 167,375 | $14.43 | $2.42M | 254.7K | Form 4 ↗ |
Fruge Mary Celeste VP, General Counsel | Jun 1, 2026 | Tax Withhold | 3,833 | $14.31 | $54.9K | 279.4K | Form 4 ↗ |
Fruge Mary Celeste VP, General Counsel | Jun 1, 2026 | Tax Withhold | 5,218 | $14.31 | $74.7K | 274.2K | Form 4 ↗ |
Fruge Mary Celeste VP, General Counsel | Jun 1, 2026 | Tax Withhold | 6,797 | $14.31 | $97.3K | 267.4K | Form 4 ↗ |
LANIGAN MATTHEW President & CEO | Jun 1, 2026 | Tax Withhold | 22,232 | $14.31 | $318.1K | 389.2K | Form 4 ↗ |
LANIGAN MATTHEW President & CEO | Jun 1, 2026 | Tax Withhold | 27,894 | $14.31 | $399.2K | 361.3K | Form 4 ↗ |
LANIGAN MATTHEW President & CEO | Jun 1, 2026 | Tax Withhold | 39,423 | $14.31 | $564.1K | 321.9K | Form 4 ↗ |
Piontek Gregg Senior Vice President and CFO | Jun 1, 2026 | Tax Withhold | 8,959 | $14.31 | $128.2K | 844.9K | Form 4 ↗ |
Piontek Gregg Senior Vice President and CFO | Jun 1, 2026 | Tax Withhold | 15,889 | $14.31 | $227.4K | 829.0K | Form 4 ↗ |
Piontek Gregg Senior Vice President and CFO | Jun 1, 2026 | Tax Withhold | 11,241 | $14.31 | $160.9K | 817.8K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
NPK International Inc. (NPKI) is primarily owned by institutional investors, who hold approximately — of total shares outstanding. Company insiders own approximately —, while retail and public investors account for the remaining —.
A total of 0 institutional investors currently hold NPKI stock, with a combined institutional value of approximately $0 as of the most recent 13F filing period.
Frequently asked questions
NPKI ownershipNPK International Inc. (NPKI) is primarily owned by institutional investors, who hold approximately — of shares. The largest shareholder is — with a — stake. Company insiders hold —. Data sourced from SEC Form 13F as of —.