ARLINGTON, Va.--(BUSINESS WIRE)--Towers Watson (NASDAQ: TW), a leading global professional services company, today announced financial results for the fourth quarter of fiscal year 2015, which ended June 30, 2015. Total revenues were $888 million for the quarter, an increase of 1% (7% constant currency and 6% organic) from $879 million for the fourth quarter of fiscal 2014. For the fiscal year, revenues were $3.6 billion, an increase of 5% over the prior year. Adjusted EBITDA for the fourth qua