Live feed18:53:29·20dINSIDERFilingvia QuantisnowSenior Vice President and CFO Piontek Gregg covered exercise/tax liability with 36,089 shares and converted options into 40,379 shares, increasing direct ownership by 0.50% to 858,182 units (SEC Form 4) (tax withholding)ByQuantisnow·Wall Street's wire, on your screen.NPKI· NPK International Inc.Consumer DiscretionaryOriginal source