0000947871-01-000051 SC TO-T/A 2 20010207 ARTIST ACQUISITION, INC. VNU N V VNU N.V. ACNIELSEN CORP 0001019878 8700 061454128 DE 1231 SC TO-T/A 34 005-47591 1526648 177 BROAD STREET STAMFORD CT 06901 2038344200 177 BROAD ST STAMFORD CT 06901 VNU N V 0001093410 0000 SC TO-T/A C/O VNU USA INC 1515 BROADWAY NEW YORK NY 10036 C/O VNU USA INC 1515 BROADWAY NEW YORK NY 10036 SC TO-T/A 1 0001.txt AMENDMENT NO. 4 TO SCHEDULE TO EX-99.(A)(5)(IV) 2 0002.txt PRESS RELEASE