* Starcom Mediavest split and launched Mediavest as a separate agency from 1st March 2016
Note Billings for the top 50 media agencies are based on accounts handled on a media buying basis.
Top 50 media agencies ranked by Nielsen
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Several more major brands, including Vodafone, Sky, and a trio of the UK's leading banks, have added their names to the list of those considering suspending their advertising on Google.
In October, lingerie retailer Cosabella replaced its digital agency with an AI platform named "Albert". Since then it has more than tripled its ROI and increased its customer base by 30%.