GP
Gregg Piontek
DELAYED 1 MONTH
Senior Vice President and CFO
NPK International Inc.
Filings
3
Companies
1
Latest
Jun 1, 2026
Transactions
Signal
Ticker / Company
Insider
Transaction
Value
Filed
—
NPK International Inc.
Gregg Piontek
Senior Vice President and CFO
Option Exercise
—
40,379 sh
Jun 3 10:53 PM
Jun 1, 2026
64
NPK International Inc.
Gregg Piontek
Senior Vice President and CFO
Sale
$1.5M
108,590 sh
Mar 5 10:50 PM
Mar 4, 2026
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NPK International Inc.
Gregg Piontek
Senior Vice President and CFO
Option Exercise
$317.9K
73,590 sh
Mar 5 10:50 PM
Mar 4, 2026