Gregg Piontek insider trades: NPK International (NPKI) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Gregg reports to the SEC
Open-market buys and sales
13 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Apr 9, 2026 | NPKI | ↓ Sell10b5-1 | 15,000 | $15.04 | $226K | Direct | Apr 10, 2026 (1d) |
| Apr 1, 2026 | NPKI | ↓ Sell10b5-1 | 35,000 | $14.51 | $508K | Direct | Apr 3, 2026 (2d) |
| Mar 4, 2026 | NPKI | ↓ Sell10b5-1 | 108,590 | $14.07 | $1.5M | Direct | Mar 5, 2026 (1d) |
| Aug 5, 2022 | NR | ↑ Buy | 10,000 | $2.55 | $25K | by IRA | Aug 9, 2022 (4d) |
| Nov 11, 2020 | NR | ↑ Buy | 15,000 | $1.08 | $16K | by Trust | Nov 12, 2020 (1d) |
| May 12, 2020 | NR | ↑ Buy | 40,000 | $1.55 | $62K | by Trust | May 12, 2020 (0d) |
| May 2, 2018 | NR | ↓ Sell | 51,490 | $10.51 | $541K | Direct | May 3, 2018 (1d) |
| May 19, 2017 | NR | ↓ Sell | 34,372 | $8.04 | $276K | Direct | May 23, 2017 (4d) |
| May 14, 2013 | NR | ↓ Sell | 30,000 | $11.30 | $339K | Direct | May 15, 2013 (1d) |
| May 6, 2011 | NRCC | ↓ Sell | 4,000 | $9.25 | $37K | by Managed Account | May 10, 2011 (4d) |
| May 6, 2011 | NRCC | ↓ Sell | 3,897 | $8.91 | $35K | Direct | May 10, 2011 (4d) |
| May 4, 2010 | NR | ↓ Sell | 2,000 | $8.00 | $16K | Direct | May 6, 2010 (2d) |
| Nov 9, 2007 | NR | ↑ Buy | 4,000 | $5.50 | $22K | Direct | Nov 14, 2007 (5d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other NPKI insiders
Open-market trades in the last 12 months
About Gregg Piontek's insider trades
Gregg Piontek is Senior Vice President and CFO at NPK International (NPKI). Since Nov 9, 2007, Gregg has reported 4 open-market purchases worth $126K and 9 sales worth $3.5M on SEC Form 4. In the last 12 months: 3 sales ($2.3M).
3 sales (65% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include shares withheld for taxes (28 filings), grants and awards (23 filings), option exercises (18 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every NPKI insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.