Live feed16:35:05·168dINSIDERFilingvia QuantisnowChairman, Pres & CEO Nye C Howard covered exercise/tax liability with 298 shares, decreasing direct ownership by 0.20% to 151,876 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.MLM· Martin Marietta Materials Inc.IndustrialsOriginal source