Tranche Update on Willis Towers Watson Public Limited Company's Equity Buyback Plan announced on November 5, 2007.

Willis Towers Watson Public Limited Company is a world leader in consulting, insurance brokerage and risk management software development. Revenues break down by activity as follows: - human capital and social benefits consulting services (35.6%): consulting services in the organization, skills assessment, management and optimization of social benefits, compensation of executives and employees, etc. ; - development of enterprise risk management solutions and services (31.9%): risk analysis, assessment consulting, effective risk management and anticipation services, design and development of software solutions for risk management. The group is also developing an insurance brokerage activity; - risk/return balance management consulting services (17.7%): for investors, insurers and reinsurers. Additionally, the group offers insurance and reinsurance consulting services, financial management services, financing and investment strategies, as well as actuarial studies and expertise in mergers and acquisitions, etc., while developing software solutions for modeling and analysis of risks and financial activities; - management and operation of a platform for the exchange and outsourcing of group health insurance plans and medical benefits (14.7%): allowing employees and retirees to choose the health coverage that meets their needs; - other (0.1%). Revenue is distributed geographically as follows: Ireland (1.7%), the United States (49.7%), the United Kingdom (20.5%) and other (28.1%).