Aon Hewitt

Aon, which is based in Chicago, will merge Hewitt with its existing consulting business once the deal is completed later this year.

Russ Fradin, Hewitt's chief executive, will lead the new unit, which will be called Aon Hewitt

Source: http://www.telegraph.co.uk/finance/newsbysector/banksandfinance/insurance/7885762/Aon-agrees-4.9bn-purchase-of-Hewitt.html