Live feed12:38:30·116dINSIDERFilingvia QuantisnowEVP and CHRO Mccunniff Donald A. covered exercise/tax liability with 192 shares, decreasing direct ownership by 4% to 4,558 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.MLM· Martin Marietta Materials Inc.IndustrialsOriginal source