Sullivan & Cromwell has advised e&, the UAE’s biggest telecoms operator, on its acquisition of a 9.8% stake in U.K.-listed Vodafone Group for $4.4 billion, making it Vodafone’s largest shareholder.

The London-based team advising e& included capital markets partner John Horsfield-Bradbury, corporate partner Ben Perry and Juan Rodriguez, who co-leads the European competition group and is co-head of the firm’s antitrust group, according to a statement from the firm.