LONDON--Next Fifteen has released its interim results for the six months up to the end of January 2011, revealing a 19% overall increase in group revenues, to £40.8 million.

On a organic basis, at constant currency rates, revenues grew by seven percent, while profit before tax surged by 19 percent to £2.49 million.

Next Fifteen CEO Tim Dyson attributed the growth to the group’s investments in digital - pointing to new business from Zynga, Facebook, American Express and Google.

“These strong results reflect the opportunities the Group is experiencing as a result of the market transition to digital,” said Dyson. “Our deep heritage in technology and investments in digital have put us in an excellent position to grow both our core customer base and into adjacent markets.”

US revenues also drove growth, improving by 11 percent. The UK and Asia-Pacific increased by four percent, but EMEA was flat.

Dyson noted strong performances from New York consumer firm M Booth, which has partnered with Beyond - the digital consultancy that Next Fifteen launched last year.

Next Fifteen posted its 2010 fiscal year results in October last year, reporting revenue growth of 10.6 per cent to £72.3 million for the year ending 31 July 2010. £9.4 million of this growth, though, came from the two main acquisitions: New York consumer firm M Booth and Asia-Pacific tech shop Upstream Asia.

Other 2010 acquisitions included digital consultancies Type 3 and OneXeno, and US financial firm The Blueshirt Group. Earlier this year, Next Fifteen also launched its Bite Communications brand in India; the firm has won new business from Swift, Siemens and HP.

Next Fifteen is also continuing its hunt for a chairman to succeed Will Whitehorn, who steps down after becoming chairman of Loewy Group.