Norton Rose has announced its preliminary 2011-12 financial results for the firm's operations around the world, reporting a 9% revenue rise to $1.32bn (£835m).

The figure covers all of the Norton Rose Group's four separate profit centres – Norton Rose LLP (which includes Europe, the Middle East and Asia), Norton Rose Australia, Norton Rose Canada and Norton Rose South Africa.

The firm said the percentage rise had been derived on a like-for-like basis, with currency variations factored in, as this is the first time the group has reported combined revenues since merging into Canada and South Africa last year.

Norton Rose completed its first, Swiss verein-structured, merger with Australia's Deacons in January 2010. This was followed by Swiss verein mergers with South Africa's Deneys Reitz and Canada's Ogilvy Renault in June 2011, followed by a further tie-up in Canada with Calgary firm Macleod Dixon in January this year.

Norton Rose Group chief executive Peter Martyr (pictured) said the international reach has been beneficial for the network, commenting: "The benefits of the group are obvious. We are seeing strong growth across the business internationally."

Last year, the firm reported revenues of $814m (£515m) for Norton Rose LLP and Norton Rose Australia combined, with the UK LLP contributing £332.8m alongside a reported profits per equity partner figure of of £466,000.

The firm has not yet announced UK LLP financials for 2011-12.