Fastest growing offices Not supplied
Key clients Heathrow, Glencore, Blackstone
It handled 60 deals worth a total of $122.4m (£76.5m). This represented a 138.1 per cent increase in value from last year.
Its largest work was advising mining giant Glencore on its proposed mega-merger with Xstrata in February, worth £45bn. Although the deal has been signed off by shareholders, it was still waiting for approval from the European Commission at the time of PRWeek going to press.
According to Morningstar's Professional Services Rankings Guide for the fourth quarter of 2012, Brunswick works for 24 of the FTSE 100 firms, more than any other agency.
Roland Rudd,Finsbury's founder, was named as the UK's most powerful PR professional in this year's PRWeek Power Book.
During the past 12 months, the agency has expanded ambitiously in Asia. These plans kicked off when it hired Alastair Hetherington, former MD of FTI's Asian operation, to lead a Hong Kong office. Further offices in Singapore and Beijing are in the pipeline.