Cobbetts has announced strong half year results with fee income up 18 per cent year on year to £24.2 million.
They were released a day after the law firm revealed it was to follow a host of rivals and convert to limited liability partnership status.
Cobbetts, which has offices in Birmingham, Leeds and Manchester, said improved working practices had led to accelerated profits which were significantly higher than last year.
James Boyd, financial director, said: "The results are very pleasing and in line with what you would expect from a growing top 50 law firm.
"This year we have really focused on the organic growth of the firm following successful mergers in 2004, whilst at the same time making a significant investment in planned relocations in Leeds and Manchester. These actions really set the foundations for further growth in support of our distinctive business strategy.
"All teams are showing encouraging half year figures but the banking and commercial practice areas have shown the highest growth rates - both over 30 per cent up on the same period last year."
Cobbetts currently employs more than 815 people across its three offices, of which 213 are in Birmingham.
Recent key lateral hires include Tiffany Cloynes from Eversheds and Adrian Watson from DLA Piper Rudnick Gary Carey who joined the Leeds and Birmingham property teams respectively and Philip Heath from the social housing practice from Wright Hassall.
Mr Boyd continued: "This half year performance is testament to the clear and defined Cobbetts business objective - to become the leading law firm outside London. We are well on track."
Cobbetts has more than 140 partners in eight core practice areas.
The change to LLP means that individuals can make investments in the business in the future, without putting personal assets at risk. It also means that accounts will have to be filed at Companies House.
Cobbetts now has an annual fee income of £50 million. It arrived in Birmingham when it took over the former Lee Crowder.
Its core practice areas are corporate, commercial property, banking, commercial, litigation, employment, private client and social housing.