Brave Bison, a media, marketing, and technology company built for the new era, today announces its fourth acquisition: of Social Chain, a market-leading social media and influencer marketing agency founded by Dragons’ Den entrepreneur Steven Bartlett, for over $20m.

Since its foundation in 2014, Manchester-based Social Chain has made waves in the industry. The agency has gone from building some of the biggest communities in social and disrupting the market, to becoming one of...