Aon has reported net income available to shareholders of $US1.36 billion ($1.92 billion) for last year, down 1% on 2014.

Revenue fell 3% to $US11.68 billion ($16.51 billion) due to a 6% unfavourable impact from foreign currency translation, partially offset by 3% organic growth in commissions and fees.

Operating expenses were down 2% to $US9.83 billion ($13.9 billion).

“Overall, our results reflect a strong performance for both the fourth quarter and the full year,” CEO Greg Case said.

“In a year of substantial volatility driven by macroeconomic factors and industry headwinds, we continued to invest heavily in client-serving capabilities across our industry-leading platform.

“These investments, combined with the leadership of our colleagues around the globe, contributed to our strongest quarterly rate of organic growth in risk solutions since 2007.”