Martin Sorrell is closing in on his second acquisition since starting his new S4 Capital group and is in talks to buy MightyHive, a US programmatic advertising company, according to people briefed on the plans.
MightyHive is valued at about $140m-$200m and generates revenue of about $25m a year, according to the people briefed on the talks. The company, which is run by Peter Kim, a former Google executive, also advises brands on taking their digital marketing in-house.