Brian K. Blackden
WPP Media, formerly GroupM, is a U.S. based media business which is owned by the multinational holding company WPP plc. GroupM was the world's largest media buying agency, as of 2023.
WPP Media, formerly GroupM, is a U.S. based media business which is owned by the multinational holding company WPP plc. GroupM was the world's largest media buying agency, as of 2023.