Skip to main content
Signal8
Launch Terminal

NPK International Inc. (NPKI)

NPK International Inc. (NPKI) Insider Trading

Directors, officers and holders of more than 10% of NPKI report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 118 transactions on file: 0 with code P, 13 with code S and 37 with other codes.

DateInsiderCodeShares
Sep 22, 2026Barton III Alvin JamesA Award12,850
Sep 9, 2026Warren Matthew JamesS Sale2,991
Aug 27, 2026ROBESON ROSE MS Sale10,000
Aug 17, 2026Lewis Michael AS Sale2,013
Jul 28, 2026Pederson Kristen J.A Award6,614
Jun 8, 2026Briggs LoriS Sale8,325
Jun 3, 2026LANIGAN MATTHEWS Sale167,375
Jun 2, 2026Briggs LoriS Sale10,446
Jun 1, 2026LANIGAN MATTHEWF Tax Payment27,894
Jun 1, 2026Fruge Mary CelesteM Exercise17,274
Jun 1, 2026Piontek GreggM Exercise40,379
Jun 1, 2026Piontek GreggF Tax Payment15,889
Jun 1, 2026Fruge Mary CelesteF Tax Payment3,833
Jun 1, 2026LANIGAN MATTHEWM Exercise100,188
Jun 1, 2026Briggs LoriM Exercise24,340
Jun 1, 2026Fruge Mary CelesteF Tax Payment5,218
Jun 1, 2026Briggs LoriF Tax Payment5,401
Jun 1, 2026Fruge Mary CelesteF Tax Payment6,797
Jun 1, 2026LANIGAN MATTHEWM Exercise100,188
Jun 1, 2026Briggs LoriM Exercise24,340
Jun 1, 2026Piontek GreggF Tax Payment8,959
Jun 1, 2026LANIGAN MATTHEWF Tax Payment39,423
Jun 1, 2026Briggs LoriF Tax Payment9,577
Jun 1, 2026Piontek GreggF Tax Payment11,241
Jun 1, 2026LANIGAN MATTHEWF Tax Payment22,232
Jun 1, 2026Briggs LoriF Tax Payment6,777
Jun 1, 2026Fruge Mary CelesteM Exercise17,274
Jun 1, 2026Piontek GreggM Exercise40,379
May 20, 2026Meer Claudia MichelA Award8,558
May 20, 2026ROBESON ROSE MA Award10,862
May 20, 2026MINGE JOHN CA Award8,558
May 20, 2026CUTILLO JOSEPH AA Award8,558
May 20, 2026LARSON RODERICK A.A Award8,558
May 20, 2026Lewis Michael AA Award8,558
May 19, 2026Briggs LoriA Award20,838
May 19, 2026LANIGAN MATTHEWA Award85,771
May 19, 2026Fruge Mary CelesteA Award18,002
May 19, 2026Piontek GreggA Award34,566
May 15, 2026Lewis Michael AS Sale2,013
Apr 9, 2026Piontek GreggS Sale15,000
Apr 1, 2026Piontek GreggS Sale35,000
Mar 25, 2026Piontek GreggS Sale15,000
Mar 16, 2026Fruge Mary CelesteS Sale1,000
Mar 16, 2026Fruge Mary CelesteM Exercise1,000
Mar 16, 2026Fruge Mary CelesteM Exercise1,000
Mar 6, 2026Fruge Mary CelesteS Sale11,193
Mar 6, 2026Fruge Mary CelesteM Exercise11,193
Mar 6, 2026Fruge Mary CelesteM Exercise11,193
Mar 4, 2026Piontek GreggM Exercise73,590
Mar 4, 2026Piontek GreggS Sale73,590

The full Form 4 history is on the NPKI company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.