Title: VP-director of marketing services
U.S. budget: $252 million
Agencies: Grey Advertising, Ogilvy & Mather Worldwide, Jordan McGrath Case & Taylor
Power play: Under Mr. Cox, SmithKline is leading the highly competitive smoking cessation category with Nicorette and Nicoderm CQ. Its other big-spending brands include workhorses Tagamet, Oxy and Tums.
Years on list: Two.