Allen & Company, the advisory firm has entered the top 20 in the US mergers and acquisitions league table for the first time this year after co-advising Adelphia Communications, the bankrupt cable TV company, on its $17.6bn (€13.5bn) takeover.

Allen & Company was co-adviser to Adelphia, alongside UBS, on the cash and shares takeover by Comcast and Time Warner, the US media groups, announced yesterday.