NPKI
insider transactionsNPK International Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
-576.0K
0 buy · 576.0K sell
Net value · 365d
-$94.2M
$0 in · $94.2M out
Sentiment · 365d
Net selling
0% buying · 100% selling
Open-market trades · 365d
16
0 buy · 576.0K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Sell·S
Lori Briggs KEY
VP & President, Ind. Solutions · 10b5-1
$122.8K
8.3K sh · $14.75
Own -3%
-
Sell·S
Matthew Lanigan KEY
President & CEO · 10b5-1
$2.4M
167.4K sh · $14.43
Own -40%
-
Sell·S
Lori Briggs KEY
VP & President, Ind. Solutions · 10b5-1
$152.3K
10.4K sh · $14.58
Own -4%
-
Exercise·M
Gregg Piontek KEY
Senior Vice President and CFO
$0
40.4K sh
Own New
-
Exercise·M
Gregg Piontek KEY
Senior Vice President and CFO
$0
40.4K sh
Own +5%
-
Other·F
Gregg Piontek KEY
Senior Vice President and CFO
$160.9K
11.2K sh · $14.31
Own -1%
-
Other·F
Gregg Piontek KEY
Senior Vice President and CFO
$227.4K
15.9K sh · $14.31
Own -2%
-
Other·F
Gregg Piontek KEY
Senior Vice President and CFO
$128.2K
9.0K sh · $14.31
Own -1%
-
Exercise·M
Matthew Lanigan KEY
President & CEO
$0
100.2K sh
Own New
-
Exercise·M
Matthew Lanigan KEY
President & CEO
$0
100.2K sh
Own +31%
-
Other·F
Matthew Lanigan KEY
President & CEO
$564.1K
39.4K sh · $14.31
Own -11%
-
Other·F
Matthew Lanigan KEY
President & CEO
$399.2K
27.9K sh · $14.31
Own -7%
-
Other·F
Matthew Lanigan KEY
President & CEO
$318.1K
22.2K sh · $14.31
Own -5%
-
Exercise·M
VP, General Counsel
$0
17.3K sh
Own New
-
Exercise·M
VP, General Counsel
$0
17.3K sh
Own +6%
-
Other·F
VP, General Counsel
$97.3K
6.8K sh · $14.31
Own -2%
-
Other·F
VP, General Counsel
$74.7K
5.2K sh · $14.31
Own -2%
-
Other·F
VP, General Counsel
$54.9K
3.8K sh · $14.31
Own -1%
-
Exercise·M
Lori Briggs KEY
VP & President, Ind. Solutions · 10b5-1
$0
24.3K sh
Own New
-
Exercise·M
Lori Briggs KEY
VP & President, Ind. Solutions · 10b5-1
$0
24.3K sh
Own +10%
-
Other·F
Lori Briggs KEY
VP & President, Ind. Solutions · 10b5-1
$97.0K
6.8K sh · $14.31
Own -3%
-
Other·F
Lori Briggs KEY
VP & President, Ind. Solutions · 10b5-1
$137.0K
9.6K sh · $14.31
Own -4%
-
Other·F
Lori Briggs KEY
VP & President, Ind. Solutions · 10b5-1
$77.3K
5.4K sh · $14.31
Own -2%
-
Grant·A
Director
$0
10.9K sh
Own +5%
-
Grant·A
Director
$0
8.6K sh
Own +7%
-
Grant·A
Director
$0
8.6K sh
Own +3%
-
Grant·A
Director
$0
8.6K sh
Own +7%
-
Grant·A
Director
$0
8.6K sh
Own +31%
-
Grant·A
Joseph A Cutillo KEY
Chief Executive Officer
$0
40.0K sh
Own +14%
-
Grant·A
Gregg Piontek KEY
Senior Vice President and CFO
$0
34.6K sh
Own +4%
-
Grant·A
Matthew Lanigan KEY
President & CEO
$0
85.8K sh
Own +26%
-
Grant·A
VP, General Counsel
$0
18.0K sh
Own +7%
-
Grant·A
Lori Briggs KEY
VP & President, Ind. Solutions
$0
20.8K sh
Own +9%
-
Sell·S
Director · 10b5-1
$30.8K
2.0K sh · $15.30
Own -2%
-
Sell·S
Joseph A Cutillo KEY
Chief Executive Officer · 10b5-1
$24.9M
50.0K sh · $497.57
Own -15%
-
Sell·S
Gregg Piontek KEY
Senior Vice President and CFO · 10b5-1
$225.7K
15.0K sh · $15.05
Own -2%
-
Sell·S
Gregg Piontek KEY
Senior Vice President and CFO · 10b5-1
$507.9K
35.0K sh · $14.51
Own -4%
-
Sell·S
Gregg Piontek KEY
Senior Vice President and CFO · 10b5-1
$225.4K
15.0K sh · $15.03
Own -2%
-
Sell·S
Joseph A Cutillo KEY
Chief Executive Officer · 10b5-1
$22.7M
50.0K sh · $453.48
Own -13%
-
Exercise·M
VP, General Counsel · 10b5-1
$0
1.0K sh
Own New
-
Sell·S
VP, General Counsel · 10b5-1
$13.6K
1.0K sh · $13.56
Own -0%
-
Exercise·M
VP, General Counsel · 10b5-1
$4.3K
1.0K sh · $4.32
Own +0%
-
Sell·S
Joseph A Cutillo KEY
Chief Executive Officer · 10b5-1
$19.8M
47.6K sh · $416.21
Own -11%
-
Sell·S
Joseph A Cutillo KEY
Chief Executive Officer · 10b5-1
$21.4M
52.4K sh · $408.42
Own -11%
-
Exercise·M
VP, General Counsel · 10b5-1
$0
11.2K sh
Own New
-
Sell·S
VP, General Counsel · 10b5-1
$149.3K
11.2K sh · $13.34
Own -4%
-
Exercise·M
VP, General Counsel · 10b5-1
$48.4K
11.2K sh · $4.32
Own +4%
-
Exercise·M
Gregg Piontek KEY
Senior Vice President and CFO · 10b5-1
$0
73.6K sh
Own New
-
Sell·S
Gregg Piontek KEY
Senior Vice President and CFO · 10b5-1
$490.6K
35.0K sh · $14.02
Own -4%
-
Sell·S
Gregg Piontek KEY
Senior Vice President and CFO · 10b5-1
$1.0M
73.6K sh · $14.10
Own -7%
-
Exercise·M
Gregg Piontek KEY
Senior Vice President and CFO · 10b5-1
$317.9K
73.6K sh · $4.32
Own +8%
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Other·F
Joseph A Cutillo KEY
Chief Executive Officer
$5.3M
11.7K sh · $455.25
Own -2%
-
Grant·A
Joseph A Cutillo KEY
Chief Executive Officer
$0
30.5K sh
Own +6%
-
Sell·S
Director · 10b5-1
$28.8K
2.0K sh · $14.31
Own -2%
-
Grant·A
Joseph A Cutillo KEY
Chief Executive Officer
$0
8.0K sh
Own +2%
-
Other·F
Joseph A Cutillo KEY
Chief Executive Officer
$2.9M
9.5K sh · $306.23
Own -2%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 8, 2026 | Lori Briggs KEY 10b5-1 | Sell S | 8.3K | $122.8K |
| Jun 3, 2026 | Matthew Lanigan KEY 10b5-1 | Sell S | 167.4K | $2.4M |
| Jun 2, 2026 | Lori Briggs KEY 10b5-1 | Sell S | 10.4K | $152.3K |
| Jun 1, 2026 | Gregg Piontek KEY | Exercise M | 40.4K | $0 |
| Jun 1, 2026 | Gregg Piontek KEY | Exercise M | 40.4K | $0 |
| Jun 1, 2026 | Gregg Piontek KEY | Other F | 11.2K | $160.9K |
| Jun 1, 2026 | Gregg Piontek KEY | Other F | 15.9K | $227.4K |
| Jun 1, 2026 | Gregg Piontek KEY | Other F | 9.0K | $128.2K |
| Jun 1, 2026 | Matthew Lanigan KEY | Exercise M | 100.2K | $0 |
| Jun 1, 2026 | Matthew Lanigan KEY | Exercise M | 100.2K | $0 |
| Jun 1, 2026 | Matthew Lanigan KEY | Other F | 39.4K | $564.1K |
| Jun 1, 2026 | Matthew Lanigan KEY | Other F | 27.9K | $399.2K |
| Jun 1, 2026 | Matthew Lanigan KEY | Other F | 22.2K | $318.1K |
| Jun 1, 2026 | Mary Celeste Fruge | Exercise M | 17.3K | $0 |
| Jun 1, 2026 | Mary Celeste Fruge | Exercise M | 17.3K | $0 |
| Jun 1, 2026 | Mary Celeste Fruge | Other F | 6.8K | $97.3K |
| Jun 1, 2026 | Mary Celeste Fruge | Other F | 5.2K | $74.7K |
| Jun 1, 2026 | Mary Celeste Fruge | Other F | 3.8K | $54.9K |
| Jun 1, 2026 | Lori Briggs KEY 10b5-1 | Exercise M | 24.3K | $0 |
| Jun 1, 2026 | Lori Briggs KEY 10b5-1 | Exercise M | 24.3K | $0 |
| Jun 1, 2026 | Lori Briggs KEY 10b5-1 | Other F | 6.8K | $97.0K |
| Jun 1, 2026 | Lori Briggs KEY 10b5-1 | Other F | 9.6K | $137.0K |
| Jun 1, 2026 | Lori Briggs KEY 10b5-1 | Other F | 5.4K | $77.3K |
| May 20, 2026 | Rose M Robeson | Grant A | 10.9K | $0 |
| May 20, 2026 | Claudia Michel Meer | Grant A | 8.6K | $0 |
| May 20, 2026 | John C Minge | Grant A | 8.6K | $0 |
| May 20, 2026 | Michael A Lewis | Grant A | 8.6K | $0 |
| May 20, 2026 | Joseph A Cutillo | Grant A | 8.6K | $0 |
| May 20, 2026 | Joseph A Cutillo KEY | Grant A | 40.0K | $0 |
| May 19, 2026 | Gregg Piontek KEY | Grant A | 34.6K | $0 |
| May 19, 2026 | Matthew Lanigan KEY | Grant A | 85.8K | $0 |
| May 19, 2026 | Mary Celeste Fruge | Grant A | 18.0K | $0 |
| May 19, 2026 | Lori Briggs KEY | Grant A | 20.8K | $0 |
| May 15, 2026 | Michael A Lewis 10b5-1 | Sell S | 2.0K | $30.8K |
| Apr 23, 2026 | Joseph A Cutillo KEY 10b5-1 | Sell S | 50.0K | $24.9M |
| Apr 9, 2026 | Gregg Piontek KEY 10b5-1 | Sell S | 15.0K | $225.7K |
| Apr 1, 2026 | Gregg Piontek KEY 10b5-1 | Sell S | 35.0K | $507.9K |
| Mar 25, 2026 | Gregg Piontek KEY 10b5-1 | Sell S | 15.0K | $225.4K |
| Mar 25, 2026 | Joseph A Cutillo KEY 10b5-1 | Sell S | 50.0K | $22.7M |
| Mar 16, 2026 | Mary Celeste Fruge 10b5-1 | Exercise M | 1.0K | $0 |
| Mar 16, 2026 | Mary Celeste Fruge 10b5-1 | Sell S | 1.0K | $13.6K |
| Mar 16, 2026 | Mary Celeste Fruge 10b5-1 | Exercise M | 1.0K | $4.3K |
| Mar 10, 2026 | Joseph A Cutillo KEY 10b5-1 | Sell S | 47.6K | $19.8M |
| Mar 9, 2026 | Joseph A Cutillo KEY 10b5-1 | Sell S | 52.4K | $21.4M |
| Mar 6, 2026 | Mary Celeste Fruge 10b5-1 | Exercise M | 11.2K | $0 |
| Mar 6, 2026 | Mary Celeste Fruge 10b5-1 | Sell S | 11.2K | $149.3K |
| Mar 6, 2026 | Mary Celeste Fruge 10b5-1 | Exercise M | 11.2K | $48.4K |
| Mar 4, 2026 | Gregg Piontek KEY 10b5-1 | Exercise M | 73.6K | $0 |
| Mar 4, 2026 | Gregg Piontek KEY 10b5-1 | Sell S | 35.0K | $490.6K |
| Mar 4, 2026 | Gregg Piontek KEY 10b5-1 | Sell S | 73.6K | $1.0M |
| Mar 4, 2026 | Gregg Piontek KEY 10b5-1 | Exercise M | 73.6K | $317.9K |
| Feb 25, 2026 | Joseph A Cutillo KEY | Other F | 11.7K | $5.3M |
| Feb 25, 2026 | Joseph A Cutillo KEY | Grant A | 30.5K | $0 |
| Feb 23, 2026 | Michael A Lewis 10b5-1 | Sell S | 2.0K | $28.8K |
| Jan 1, 2026 | Joseph A Cutillo KEY | Grant A | 8.0K | $0 |
| Dec 31, 2025 | Joseph A Cutillo KEY | Other F | 9.5K | $2.9M |
About NPKI insider trading
This page tracks insider transactions for NPK International Inc. (NPKI) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.