BusinessweekChart: Global Ad Agencies: The Big FourFacebookXLinkedInEmailLinkGiftFacebookXLinkedInEmailLinkGiftGift this articleContact us:Provide news feedback or report an errorConfidential tip?Send a tip to our reportersSite feedback:Take our SurveyNew WindowFacebookXLinkedInEmailLinkGiftJuly 7, 2003 at 4:00 AM UTCBookmarkSaveLock This article is for subscribers only.