Global Billings Rankings & Market Shares

Despite being a year of corporate transition, GroupM bettered the media billings growth rate of the Big 6 agency holding company media units, and expanded its share of market to 30.2%, making it half again bigger than its next-closest rival, Publicis Media (20.4%) share, according to year-end projections for 2019 being released this week by media agency tracker ComVergence.