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NPK International Inc.

NPKI Net selling
CIK 0000071829 #2439 in the set updated 17 Sep 2026
Bought (120 mo)
$1.51M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$17.31M
$4.32M on a plan · $10.79M straight out of an exercise
Sold at will
$2.20M
16 of 63 sales
Net
−$15.81M
−$692.81K against sales at will

By person

25 insiders · 102 transactions
4.5×

Matthew S. Lanigan holds only 4.5 times base salary in stock. $3.42M of shares against $754.00K in salary for 2025.

Salary from the company's own proxy. The shares are what Matthew S. Lanigan last reported holding, valued at $13.41, the price Common Stock was last bought or sold at on the open market here, on 9 Sep 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Howes Paul L
President & CEO
$228.49K (5)
$5.53M (8) scheduled
−$5.30M
1,261,325
1.49%
$16.92M
+114.2%
LANIGAN MATTHEW
President & CEO
$48.43K (1)
$3.68M (6) scheduled
−$3.63M
254,699
0.3000%
$3.42M
+409.4%
Piontek Gregg
Senior Vice President and CFO
$103.59K (5)
$3.30M (8) scheduled
−$3.20M
978,182
1.15%
$13.12M
+387.6%
Smith Bruce Campbell
Exec Vice President & Chief
—
$1.66M (12) scheduled
−$1.66M
397,267
0.4679%
$5.33M
+68.5%
AIROLA MARK J
Sr Vice Pres, General Counsel
—
$1.32M (1) scheduled
−$1.32M
387,868
0.4568%
$5.20M
+29.9%
Young Donald Win
Director
$680.05K (8)
—
+$680.05K
310,940
0.3662%
$4.17M
—
Briggs Lori
VP & President, Ind. Solutions
—
$617.47K (6) scheduled
−$617.47K
247,165
0.2911%
$3.31M
+848.5%
Anderson David C
Director
—
$467.81K (3)
−$467.81K
150,841
0.1776%
$2.02M
−16.7%
FINLEY G STEPHEN
Director
—
$208.88K (8)
−$208.88K
275,484
0.3244%
$3.69M
+52.7%
MINGE JOHN C
Director
$181.80K (7)
—
+$181.80K
253,942
0.2991%
$3.41M
—
Fruge Mary Celeste
VP, General Counsel
—
$162.86K (2) scheduled
−$162.86K
284,641
0.3352%
$3.82M
+38.2%
ROBESON ROSE M
Director
—
$134.92K (1) scheduled
−$134.92K
215,147
0.2534%
$2.89M
—
Lewis Michael A
Director
$20.90K (1)
$150.57K (6) scheduled
−$129.67K
135,865
0.1600%
$1.82M
—
Meer Claudia Michel
Director
$100.88K (5)
—
+$100.88K
126,693
0.1492%
$1.70M
—
CUTILLO JOSEPH A
Director
$100.00K (1)
—
+$100.00K
36,155
0.0426%
$484.88K
—
Earle Edward Chipman
VP, General Counsel, CAO
$43.90K (4)
—
+$43.90K
230,265
0.2712%
$3.09M
—
Warren Matthew James
Chief Accounting Officer
—
$40.11K (1) scheduled
−$40.11K
51,439
0.0606%
$689.86K
−5.5%
WHITE DOUGLAS L
VP, CAO & Treasurer
—
$37.27K (1)
−$37.27K
305,245
0.3595%
$4.09M
+1,880%
PATERSON DAVID A
VP & President, Fluids Systems
—
—
—
386,245
0.4549%
$5.18M
—
BEST ANTHONY JAMES
Director
—
—
—
237,809
0.2801%
$3.19M
+267.4%
McFarland James
Director
—
—
—
228,748
0.2694%
$3.07M
+0.4%
WARREN GARY L
Director
—
—
—
226,706
0.2670%
$3.04M
+17.5%
VOLLANDS PHILLIP T
Vice President and President
—
—
—
70,866
0.0835%
$950.40K
+29.8%
LARSON RODERICK A.
Director
—
—
—
23,655
0.0279%
$317.24K
—
Pederson Kristen J.
Director
—
—
—
6,614
0.0078%
$88.70K
—

Individual transactions

102
Insider
Date
Role
Action
Shares
Price
Amount
Warren Matthew James
9 Sep 2026
Chief Accounting Officer
Sold on a plan
2,991
$13.41
$40.11K
ROBESON ROSE M
27 Aug 2026
Director
Sold on a plan
10,000
$13.49
$134.92K
Lewis Michael A
17 Aug 2026
Director
Sold on a plan
2,013
$14.26
$28.71K
Briggs Lori
8 Jun 2026
VP & President, Ind. Solutions
Sold on a plan
8,325
$14.75
$122.79K
LANIGAN MATTHEW
3 Jun 2026
President & CEO
Sold on a plan
167,375
$14.43
$2.42M
Briggs Lori
2 Jun 2026
VP & President, Ind. Solutions
Sold on a plan
10,446
$14.58
$152.28K
Lewis Michael A
15 May 2026
Director
Sold on a plan
2,013
$15.30
$30.80K
Piontek Gregg
9 Apr 2026
Senior Vice President and CFO
Sold on a plan
15,000
$15.05
$225.68K
Piontek Gregg
1 Apr 2026
Senior Vice President and CFO
Sold on a plan
35,000
$14.51
$507.86K
Piontek Gregg
25 Mar 2026
Senior Vice President and CFO
Sold on a plan
15,000
$15.03
$225.38K
Fruge Mary Celeste
16 Mar 2026
VP, General Counsel
Sold after exercise
1,000
$13.56
$13.56K
Fruge Mary Celeste
6 Mar 2026
VP, General Counsel
Sold after exercise
11,193
$13.34
$149.30K
Piontek Gregg
4 Mar 2026
Senior Vice President and CFO
Sold after exercise
35,000
$14.02
$490.59K
Piontek Gregg
4 Mar 2026
Senior Vice President and CFO
Sold after exercise
73,590
$14.10
$1.04M
Lewis Michael A
23 Feb 2026
Director
Sold on a plan
2,013
$14.31
$28.80K
Lewis Michael A
24 Nov 2025
Director
Sold on a plan
2,013
$12.00
$24.16K
Briggs Lori
1 Oct 2025
VP & President, Ind. Solutions
Sold on a plan
10,108
$11.51
$116.35K
LANIGAN MATTHEW
3 Sep 2025
President & CEO
Sold after exercise
1,000
$10.38
$10.38K
Lewis Michael A
25 Aug 2025
Director
Sold on a plan
2,013
$10.33
$20.80K
LANIGAN MATTHEW
22 Aug 2025
President & CEO
Sold after exercise
68,896
$10.34
$712.54K
Briggs Lori
11 Aug 2025
VP & President, Ind. Solutions
Sold on a plan
8,005
$9.51
$76.15K
Briggs Lori
9 Jul 2025
VP & President, Ind. Solutions
Sold on a plan
8,005
$8.57
$68.58K
Lewis Michael A
16 Jun 2025
Director
Sold on a plan
2,013
$8.60
$17.32K
Briggs Lori
6 Jun 2025
VP & President, Ind. Solutions
Sold on a plan
9,704
$8.38
$81.32K
Meer Claudia Michel
19 May 2025
Director
Buy
4,000
$7.92
$31.68K
CUTILLO JOSEPH A
8 May 2025
Director
Buy
12,500
$8.00
$100.00K
MINGE JOHN C
5 Mar 2025
Director
Buy
10,000
$5.38
$53.80K
Meer Claudia Michel
21 Aug 2023
Director
Buy
1,300
$5.57
$7.24K
Meer Claudia Michel
16 Aug 2023
Director
Buy
8,000
$5.27
$42.18K
MINGE JOHN C
15 Mar 2023
Director
Buy
5,000
$4.05
$20.25K
MINGE JOHN C
15 Mar 2023
Director
Buy
5,000
$4.00
$20.00K
Lewis Michael A
9 Dec 2022
Director
Buy
5,251
$3.98
$20.90K
MINGE JOHN C
21 Nov 2022
Director
Buy
5,000
$3.64
$18.20K
Young Donald Win
21 Nov 2022
Director
Buy
30,000
$3.94
$118.31K
Meer Claudia Michel
18 Nov 2022
Director
Buy
4,000
$3.95
$15.80K
Meer Claudia Michel
16 Nov 2022
Director
Buy
1,000
$3.98
$3.98K
MINGE JOHN C
10 Nov 2022
Director
Buy
5,000
$3.95
$19.74K
Young Donald Win
18 Aug 2022
Director
Buy
3,800
$2.91
$11.05K
Young Donald Win
17 Aug 2022
Director
Buy
40,400
$2.66
$107.53K
MINGE JOHN C
16 Aug 2022
Director
Buy
15,000
$2.66
$39.85K
Young Donald Win
16 Aug 2022
Director
Buy
33,828
$2.68
$90.55K
Young Donald Win
15 Aug 2022
Director
Buy
15,375
$2.69
$41.37K
Earle Edward Chipman
5 Aug 2022
VP, General Counsel, CAO
Buy
10,000
$2.56
$25.61K
LANIGAN MATTHEW
5 Aug 2022
President & CEO
Buy
19,000
$2.55
$48.43K
Piontek Gregg
5 Aug 2022
Senior Vice President and CFO
Buy indirect
10,000
$2.55
$25.49K
Young Donald Win
12 May 2022
Director
Buy
19,252
$3.54
$68.16K
Young Donald Win
9 May 2022
Director
Buy
42,000
$3.45
$145.02K
Young Donald Win
6 May 2022
Director
Buy
26,450
$3.71
$98.06K
Howes Paul L
26 Aug 2021
President & CEO
Buy
30,000
$2.29
$68.72K
Howes Paul L
16 Nov 2020
President and CEO
Buy
7,500
$1.30
$9.72K
Howes Paul L
16 Nov 2020
President and CEO
Buy
37,500
$1.28
$48.15K
Howes Paul L
13 Nov 2020
President and CEO
Buy
12,500
$1.15
$14.37K
Piontek Gregg
11 Nov 2020
Senior Vice President and CFO
Buy indirect
15,000
$1.08
$16.20K
Piontek Gregg
12 May 2020
Senior Vice President and CFO
Buy indirect
15,000
$1.64
$24.60K
Piontek Gregg
11 May 2020
Senior Vice President and CFO
Buy indirect
5,000
$1.58
$7.90K
Earle Edward Chipman
8 May 2020
VP, General Counsel, CAO
Buy
1,700
$1.45
$2.47K
Earle Edward Chipman
8 May 2020
VP, General Counsel, CAO
Buy
4,800
$1.46
$7.01K
Earle Edward Chipman
8 May 2020
VP, General Counsel, CAO
Buy
6,000
$1.47
$8.82K
Piontek Gregg
8 May 2020
Senior Vice President and CFO
Buy indirect
20,000
$1.47
$29.40K
WHITE DOUGLAS L
27 Nov 2019
Controller, CAO, PAO
Sell
6,145
$6.07
$37.27K
Howes Paul L
19 Nov 2019
President and CEO
Buy
15,000
$5.84
$87.54K
Howes Paul L
5 Apr 2019
President and CEO
Sell
106,487
$9.50
$1.01M
Howes Paul L
1 Apr 2019
President and CEO
Sold after exercise
200,000
$9.21
$1.84M
MINGE JOHN C
20 Nov 2018
Director
Buy
1,300
$7.66
$9.96K
Howes Paul L
4 May 2018
President and CEO
Sold after exercise
47,495
$10.40
$494.17K
Smith Bruce Campbell
4 May 2018
Exec Vice President & Chief
Sold after exercise
43,750
$10.50
$459.25K
Howes Paul L
3 May 2018
President and CEO
Sold after exercise
75,000
$10.27
$770.21K
Anderson David C
3 May 2018
Director
Sell
20,000
$10.26
$205.28K
Piontek Gregg
2 May 2018
Senior Vice President and CFO
Sold after exercise
51,490
$10.51
$540.91K
LANIGAN MATTHEW
2 May 2018
VP and Pres of NMIS
Sell
18,913
$10.52
$198.96K
Howes Paul L
2 May 2018
President and CEO
Sold after exercise
27,505
$10.51
$289.18K
AIROLA MARK J
1 May 2018
Sr Vice Pres, General Counsel
Sold after exercise
127,250
$10.34
$1.32M
Smith Bruce Campbell
22 Feb 2018
Exec Vice President & Chief
Sold after exercise
20,678
$8.53
$176.40K
Smith Bruce Campbell
21 Feb 2018
Exec Vice President & Chief
Sold after exercise
23,072
$8.42
$194.34K
FINLEY G STEPHEN
4 Dec 2017
Director
Sell
2,823
$9.07
$25.60K
FINLEY G STEPHEN
1 Dec 2017
Director
Sell
1,300
$9.12
$11.85K
FINLEY G STEPHEN
30 Nov 2017
Director
Sell
6,000
$9.07
$54.40K
FINLEY G STEPHEN
29 Nov 2017
Director
Sell
300
$8.80
$2.64K
FINLEY G STEPHEN
29 Nov 2017
Director
Sell
6,000
$8.86
$53.14K
FINLEY G STEPHEN
28 Nov 2017
Director
Sell
5,000
$8.72
$43.59K
FINLEY G STEPHEN
27 Nov 2017
Director
Sell
1,000
$8.80
$8.80K
FINLEY G STEPHEN
27 Nov 2017
Director
Sell
1,000
$8.85
$8.85K
Anderson David C
14 Nov 2017
Director
Sell
17,000
$8.91
$151.44K
LANIGAN MATTHEW
1 Aug 2017
VP and Pres of NMIS
Sold after exercise
34,948
$8.46
$295.49K
LANIGAN MATTHEW
1 Aug 2017
VP and Pres of NMIS
Sold after exercise
5,823
$8.46
$49.23K
Anderson David C
2 Jun 2017
Director
Sell
15,124
$7.35
$111.10K
Piontek Gregg
19 May 2017
Vice President and CFO
Sell
3,088
$8.04
$24.82K
Piontek Gregg
19 May 2017
Vice President and CFO
Sell
31,284
$8.04
$251.47K
Howes Paul L
16 May 2017
President and CEO
Sold after exercise
32,091
$7.90
$253.63K
Smith Bruce Campbell
15 May 2017
Exec Vice President &
Sold after exercise
9,478
$8.00
$75.82K
Howes Paul L
15 May 2017
President and CEO
Sold after exercise
47,909
$8.01
$383.78K
Howes Paul L
15 May 2017
President and CEO
Sold after exercise
61,140
$7.94
$485.31K
Smith Bruce Campbell
12 May 2017
Exec Vice President &
Sold after exercise
1,100
$8.00
$8.80K
Smith Bruce Campbell
12 Apr 2017
Exec Vice President &
Sold after exercise
2,400
$8.25
$19.80K
Smith Bruce Campbell
10 Apr 2017
Exec Vice President &
Sold after exercise
35,522
$8.25
$293.06K
Smith Bruce Campbell
5 Apr 2017
Exec Vice President &
Sold after exercise
10,850
$8.09
$87.75K
Smith Bruce Campbell
5 Apr 2017
Exec Vice President &
Sold after exercise
1,500
$8.09
$12.13K
Smith Bruce Campbell
5 Apr 2017
Exec Vice President &
Sold after exercise
7,932
$8.09
$64.15K
Smith Bruce Campbell
4 Apr 2017
Exec Vice President &
Sold after exercise
21,388
$8.04
$172.01K
Smith Bruce Campbell
3 Apr 2017
Exec Vice President &
Sold after exercise
12,242
$8.01
$98.04K
McFarland James
8 Dec 2016
Director
Exercised, kept
10,000
$7.17
$71.70K
WARREN GARY L
6 Dec 2016
Director
Exercised, kept
10,000
$7.17
$71.70K

What was left out

Form 4 filings counted 309
Amendments (4/A) skipped 14
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 18
Sales straight out of an exercise 29
Sales at will 16
Transactions with no price 0
Shares from compensation/vesting 11,263,400
Sales filed before the plan box existed 16
History held since 7 Dec 2016