S4Capital, a technology-led digital advertising and marketing services company, agreed to acquire TheoremOne, an engineering and innovation firm. Financial terms were not disclosed. “With the intersection of Marketing, Sales, and Information Technology continuing to be a key topic for brands and all C-suite executives, we at S4Capital are building a genuinely integrated offer for our clients comprising best-in-class technology services combined with content and data&digital media expertise. We are delighted to welcome Brady, Will, David, and their colleagues – their vision and ambition will no doubt be a great fit for us,” Martin Sorrell, S4Capital Executive Chairman.