Private equity firms keep gobbling up ad tech companies -- and the trend shows no sign of slowing

andrechinn/Flickr CC The number of ad tech firms being bought by private equity companies has been steadily rising over the past three years and the trend shows no sign of dissipating. Notable recent deals include Applovin's $1.4 billion sale to Chinese private equity firm Orient Hontai Capital in September and Vector Capital's acquisition of Sizmek for $122 million in August. Results International, a UK-based mergers and acquisitions advisor, told Business Insider the number of private equity c...