Gregg Piontek

CIK 1418328 · Senior Vice President and CFO · last filed 2026-06-03

Gregg Piontek is a Senior Vice President and CFO who has filed 63 SEC Form 4 insider transactions across 1 company since 2007. The most recent filing, for NR, was dated Jun 3, 2026. Across all open-market trades the lifetime net is −$3.6M, making them a net seller over the disclosed history.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$0

Companies

1

Total Filings

63

Lifetime Open-Market Net

-$3.61M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
NPK International Inc. (NR) Delisted Senior Vice President and CFO 894,044 $7.25 $6.48M -$3.61M 63 2026-06-03

Recent Filings

63 filings
Form 4 transactions across all companies, newest first.
Filed Symbol Action Net Shares Net $ Link
2026-06-03 NPK International Inc. (NR) Delisted Mixed +4,290 -$516.4K EDGAR
2026-05-21 NPK International Inc. (NR) Delisted Grant (A) +34,566 $0 EDGAR
2026-04-10 NPK International Inc. (NR) Delisted Sell (S) −15,000 -$225.7K EDGAR
2026-04-03 NPK International Inc. (NR) Delisted Sell (S) −35,000 -$507.9K EDGAR
2026-03-26 NPK International Inc. (NR) Delisted Sell (S) −15,000 -$225.4K EDGAR
2026-03-05 NPK International Inc. (NR) Delisted Mixed −35,000 -$1.21M EDGAR
2025-06-03 NPK International Inc. (NR) Delisted Mixed +42,090 -$340.4K EDGAR
2025-05-16 NPK International Inc. (NR) Delisted Grant (A) +85,706 $0 EDGAR
2024-06-04 NPK International Inc. (NR) Delisted Mixed +82,092 -$451.6K EDGAR
2024-05-17 NPK International Inc. (NR) Delisted Grant (A) +68,308 $0 EDGAR
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Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.