The forever incomplete list of agencies is a hand-picked directory of creative advertising agencies throughout the united states.. List of advertising agencies largest agencies. the five largest agencies, with their estimated worldwide revenues in 2014: wpp group, london $19.0 billion; omnicom. We foster agency growth by providing detailed contact info for top decision makers, in marketing, pr, advertising and others. learn more..
The forever incomplete list of agencies is a hand-picked directory of creative advertising agencies throughout the united states.. List of advertising agencies largest agencies. the five largest agencies, with their estimated worldwide revenues in 2014: wpp group, london $19.0 billion; omnicom. We foster agency growth by providing detailed contact info for top decision makers, in marketing, pr, advertising and others. learn more..
