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CIK 0000071829 · Accelerated filer

NPK International Inc.

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Ticker
NPKI
Exchange
NYSE
Industry
Services-Miscellaneous Equipment Rental & Leasing
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
721123385
Phone
281-362-6800
Business address
9320 LAKESIDE BOULEVARD, SUITE 100, THE WOODLANDS, TX, 77381
Former names
NEWPARK RESOURCES INC
Open-market buys, last 90 days
$138,600
in 1 filing
Open-market sales, last 90 days
$203,735
in 3 filings, $204K under 10b5-1 plans

Net −$65,135. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. MINGE JOHN C +$139K Director 1 filing
  2. ROBESON ROSE M −$135K Director sold 4% of stake
  3. Warren Matthew James −$40K Chief Accounting Officer sold 5% of stake
  4. Lewis Michael A −$29K Director sold 1% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-06-01 LANIGAN MATTHEW President & CEO Shares withheld for taxes −27,894 $14.31 $399K 361,309
2026-06-01 LANIGAN MATTHEW President & CEO Shares withheld for taxes −39,423 $14.31 $564K 321,886
2026-06-01 LANIGAN MATTHEW President & CEO Option exercise +100,188 422,074
2026-06-01 LANIGAN MATTHEW President & CEO Option exercise · Restricted Stock Units −100,188 0
2026-06-01 Piontek Gregg Senior Vice President and CFO Shares withheld for taxes −8,959 $14.31 $128K 844,933
2026-06-01 Piontek Gregg Senior Vice President and CFO Shares withheld for taxes −15,889 $14.31 $227K 829,044
2026-06-01 Piontek Gregg Senior Vice President and CFO Shares withheld for taxes −11,241 $14.31 $161K 817,803
2026-06-01 Piontek Gregg Senior Vice President and CFO Option exercise +40,379 858,182
2026-06-01 Piontek Gregg Senior Vice President and CFO Option exercise · Restricted Stock Units −40,379 0
2026-05-20 Meer Claudia Michel Director Grant or award +8,558 126,693
2026-05-20 MINGE JOHN C Director Grant or award +8,558 253,942
2026-05-20 CUTILLO JOSEPH A Director Grant or award +8,558 36,155
2026-05-20 LARSON RODERICK A. Director Grant or award +8,558 23,655
2026-05-20 Lewis Michael A Director Grant or award +8,558 137,878
2026-05-20 ROBESON ROSE M Director Grant or award +10,862 225,147
2026-05-19 Fruge Mary Celeste VP, General Counsel Grant or award +18,002 283,215
2026-05-19 Briggs Lori VP & President, Ind. Solutions Grant or award +20,838 263,351
2026-05-19 LANIGAN MATTHEW President & CEO Grant or award +85,771 411,435
2026-05-19 Piontek Gregg Senior Vice President and CFO Grant or award +34,566 853,892
2026-05-15 Lewis Michael A Director Sale 10b5-1 −2,013 $15.30 $31K 129,320

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