Allen & Overy (A&O) topped both the bank and issuer rankings for debt capital market transactions in the first six months of 2014, according to Thomson Reuters’ latest global league tables.

The firm advised managers on 342 transactions in the first half of this year, nine more than in the same period in 2013, with the total deal value coming to $245bn (£146bn). On the issuer side, the firm handled 90 transactions with a value of $86bn (£51bn).