It said mid-cap M&A deals worth up to $500m totalled $489.9bn (£309.6bn) in the first nine months of 2010 – a 35.5 per cent increase on last year.
Meanwhile, small-cap M&A deals valued up to $50m totalled $93.3bn in the first nine months of 2010 – a 21 per cent increase on last year.
Estimated global fees from completed mid-market M&A activity reached $11.7bn for the first three quarters while global fees from completed small cap activity stood at $4.8bn for the same period.
The Americas led the mid-cap market, with $184.3bn of announced deals, or 37.6 per cent market share – an increase of 4.5 per cent.
Europe, the Middle East and Asia (EMEA) led the market in terms of the number of deals announced, with over 10,500 deals in the first half of the year.
The Asia-Pacific region led the small-cap market, with $37.6bn of announced deals or 40.3 per cent market share.