Cleary Gottlieb Steen & Hamilton has stormed to the top of the European equity capital markets league after a series of big-ticket mandates, while Allen & Overy (A&O) and Sidley Austin have maintained market share in the burgeoning debt market.

Research released this month by Thomson Financial shows Cleary topping the issuer table for equity capital markets in the first nine months of the year, advising on eight deals worth $22.7bn (£11.9bn), ahead of Freshfields Bruckhaus Deringer in second place on 29 deals worth $17.24bn (£9bn).