Finalists: Paul Hastings (highly commended) • Sullivan & Cromwell • Alber & Geiger • Integrites

Arthur Cox's M&A team has advised on the majority of Ireland's largest and most complex transactions across a range of sectors during 2015, including advising building material manufacturer CRH on its acquisition of certain assets of cement makers Lafarge and Holcim for €6.5 billion, the largest ever acquisition by an indigenous Irish company.

Arthur Cox was lead global legal advisor to CRH plc on its acquisition of assets spanning 12 jurisdictions: the UK, France, Germany, Brazil, Canada, Serbia, Slovakia, Hungary, Romania, La Reunion and the Philippines.