Proving that accounting firms are in demand for more than just tax work, the 2015 Top 100 Firms reported growth in several other niche services, including the top two areas of attest and mergers & acquisitions, according to this year's 80 responding firms. The 84 percent reporting increased business in attest services marked a 9 percentage point increase over 2014, crowning it as this year's No. 1 area of niche growth. In the second spot, M&A rose four spots over last year, with 74 percent of firms tracking growth.
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