Live feed12:28:24·109dINSIDERFilingvia QuantisnowSVP, Controller & CAO Cardin Robert J covered exercise/tax liability with 312 shares, decreasing direct ownership by 2% to 12,459 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.MLM· Martin Marietta Materials Inc.IndustrialsOriginal source