Live feed18:38:40·145dINSIDERFilingvia QuantisnowPresident & CEO George Mark R covered exercise/tax liability with 548 shares and converted options into 1,400 shares, increasing direct ownership by 5% to 18,918 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.NSC· Norfolk Southern CorporationIndustrialsOriginal source