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Insider ActivityNPKI
Piontek Gregg, Senior Vice President and CFO at NPK International Inc., sold $508K of NPKI
Updated Jun 11, 2026
Piontek Gregg
Senior Vice President and CFO
NPK International Inc. ·
$NPKI
Transaction Details
| Insider | Piontek Gregg |
|---|---|
| Title | Senior Vice President and CFO |
| Company | NPK International Inc. |
| Ticker | NPKI |
| Transaction Type | Sale |
| Transaction Date | 2026-04-01 |
| Shares Traded | 35,000 |
| Price Per Share | $14.5104 |
| Total Value | $508K |
| Filed Date | 2026-04-03 |
| Accession Number | 0001418328-26-000006 |
Ownership Context
| Shares Owned After Transaction | 834,326 |
|---|---|
| Ownership Type | Direct |
SEC Filing
Accession: 0001418328-26-000006
Other Insider Trades — NPKI
| Insider | Title | Action | Value | Date |
|---|---|---|---|---|
| Briggs Lori | VP & President, Ind. Solutions | sold | $123K | 2026-06-08 |
| LANIGAN MATTHEW | President & CEO, Director | sold | $2.4M | 2026-06-03 |
| Briggs Lori | VP & President, Ind. Solutions | sold | $152K | 2026-06-02 |
| Briggs Lori | VP & President, Ind. Solutions | traded | $77K | 2026-06-01 |
| LANIGAN MATTHEW | President & CEO, Director | traded | $564K | 2026-06-01 |
| LANIGAN MATTHEW | President & CEO, Director | traded | $399K | 2026-06-01 |
| Piontek Gregg | Senior Vice President and CFO | traded | $161K | 2026-06-01 |
| LANIGAN MATTHEW | President & CEO, Director | traded | — | 2026-06-01 |
| Piontek Gregg | Senior Vice President and CFO | traded | $227K | 2026-06-01 |
| LANIGAN MATTHEW | President & CEO, Director | traded | $318K | 2026-06-01 |
Other Trades by Piontek Gregg
| Ticker | Company | Action | Value | Date |
|---|---|---|---|---|
| NPKI | NPK International Inc. | traded | $128K | 2026-06-01 |
| NPKI | NPK International Inc. | traded | $227K | 2026-06-01 |
| NPKI | NPK International Inc. | traded | $161K | 2026-06-01 |
| NPKI | NPK International Inc. | traded | — | 2026-06-01 |
| NPKI | NPK International Inc. | traded | — | 2026-05-19 |
| NPKI | NPK International Inc. | sold | $226K | 2026-04-09 |
| NPKI | NPK International Inc. | sold | $225K | 2026-03-25 |
Full Ticker Profile
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Data sourced from SEC Form 4 insider trading filings. Transaction details are as reported to the Securities and Exchange Commission. This page does not constitute financial advice. StonkWhisper presents public records — it does not verify or guarantee the accuracy of SEC filings.
Last updated: June 11, 2026 at 07:21 UTC