The marketing services tycoon Sir Martin Sorrell will this week swoop to make two US additions worth more than $200m (£146m) to his digital advertising empire.
Sky News understands that S4 Capital - founded by Sir Martin in the wake of his departure from WPP Group - will announce on Monday that it is buying Decoded Advertising, a creative agency, and Metric Theory, a data-driven digital agency.
The purchases will be the latest in a blizzard unveiled by S4 since its launch less than three years ago, and will take the group s total workforce to more than 3,500 people.
Insiders said that Decoded and Metric Theory would become part of S4 s MediaMonks and MightyHive divisions respectively.