Huntsworth unveiled a 14 per cent profit rise and revealed it has bought US-based Atomic PR for $13.3 million as it unveiled its full-year results.
Huntsworth, led by chief executive Lord Chadlington, (pictured) reported a pre-tax profit of £26.7 million for the January-December period, compared with £23.4 million the year before - a rise of 14.4 per cent.
Turnover rose 11.1 per cent to £173.6 million.
Huntsworth also confirmed British Airways had appointed Grayling to handle its public relations in 38 countries from 1 April for three years.
Huntsworth has bought all of the US-based Atomic Communications to expand its North America footprint, 50 per cent of Atomic Communications Holdings in the UK and the web based data analytics application, ComContext.
Atomic has been acquired from co-founders Andy Getsey and James Hannon, and a number of minority shareholders.
Huntsworth, whose public relations brands include Citigate, Grayling and Red, maintained its forecast of meeting like-for-like growth of seven per cent plus in 2011.
The group, which also provides healthcare communications, said its final dividend was up 20.9 per cent to 2.60 pence.
The company's major wins in 2010 included Morgan Stanley in China, Clifford Chance and RBS Corporate Banking.