O2 (UK) BT subsidiaries: Esat Digifone in Ireland, Viag Interkom in Germany and Telfort Mobiel in the Netherlands. The rebranding was supported by a European advertising campaign, which began on 16 April 2002, across all four countries, at a cost of £130 million. The main launch campaign ran from 18 June and was developed by Vallance Carruthers Coleman Priest, working alongside brand consultancy Lambie-Nairn, creators of the "O2" brand identity. In March 2005, mmO2 restructured its shares and the company was relisted as O2 plc. On 30 November 2005, O2 agreed to a takeover by Telefónica, a Spanish telecommunications company, for £17.7
Power Corporation of Canada in 2000 with the acquisition of Canada Life, Mackenzie Financial and Putnam Investments. Power Corporation owns 100% of Square Victoria Communications Group and 65.6% of Power Financial Corporation. While it was originally established as an electric utility holding company, the company became a conglomerate with major interests in the finance industry, as well as interests in other business sectors such as communications and renewable energy. The Co-Chief Executive Officers are Paul Desmarais, Jr. and André Desmarais. As a holding company, the officers run the companies through the various Boards. Responsible management has long been a corporate value at Power Corporation.