Sir Martin Sorrell is not done shopping.

Following his departure from WPP in April 2018, Sorrell formed S4 Capital and has picked up two companies, digital production firm MediaMonks and programmatic firm MightyHive. Now, he would “like to have a significant first-party data asset,” the former WPP CEO said when asked about S4 Capital’s future acquisition plans during an interview at the Interactive Advertising Bureau’s Annual Leadership Meeting in Phoenix, Arizona.

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