The US tables were led by Joele Frank Wilkinson Brimmer Katcher and Kekst and Company.
The latest figures have been supplied by independent M&A intelligence service Mergermarket as part of its quarterly highlights.
According to the latest stats, global M&A totalled $881bn in H1 2010, up 7.8% from H1 2009. Deal count is also up by 3.3% at 5,026 announced deals.
European M&A is also up 24% from H1 2009 to reach $240.3bn.