Sorrell's S4 Capital Is Bidding Against BlueFocus to Acquire Programmatic Buying Firm MightyHive

R3 estimates the deal at between $150 and $200 million

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Martin Sorrell’s S4 Capital is in the throes of a bidding war to acquire MightyHive, which claims to be “one of the largest and fastest-growing programmatic buyers in the world,” with interested parties including China’s data technology company BlueFocus, according to sources familiar with the process.

The Financial Times first reported that S4 Capital was proposing the transaction, which will be Sorrell’s second acquisition since he left WPP. In July, S4 Capital outbid WPP to buy digital production company MediaMonks for $350 million.

“The

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