Guy Carpenter Unveils �Capital Ideas� Global Branding Initiative

Campaign Underscores Tradition of Innovation, Industry Expertise, Thought Leadership

New York, August 30, 2007 – Guy Carpenter & Company, LLC, the leading global risk and reinsurance specialist and a part of the Marsh & McLennan Companies (NYSE: MMC), today announced the launch of a new branding campaign focused on the theme of �Capital Ideas.� The campaign centers on Guy Carpenter�s tradition of innovation, breadth of intellectual capital, creative spirit and ability to create value through keen insights into its clients� businesses.

Featuring an intriguing origami theme that uses global currency to demonstrate how capital can be used more creatively and effectively, the integrated branding initiative will include print, direct mail, event marketing and online components.

Developed in conjunction with New York-based brand development firm The Halo Group, the striking print ads feature currency ingeniously folded in eye-catching shapes accompanied by taglines such as �Release your capital and it will return� and �Focus your capital to make a clear impact.� The campaign�s message underscores Guy Carpenter�s commitment to providing focused advocacy, developing breakthrough approaches to managing risk and helping clients become more efficient, more effective and ultimately more successful.

�In this campaign, we wanted to find a simple and powerful way to communicate the value that we deliver to our clients,� said David Spiller, President and CEO of Guy Carpenter. ��Capital Ideas� speaks to all that sets Guy Carpenter apart in the marketplace � our rich history of innovation, our culture of client-focused value creation and our unique way of looking at risk. But, it�s more than just a corporate signature. It defines a new standard for risk and capital market solutions for ourselves, our clients and ultimately the industry.�

Coinciding with the launch of the �Capital Ideas� campaign, Guy Carpenter also announced that it will be �going blue.� Beginning on September 10, all communications bearing the Guy Carpenter name will adopt a new look, changing its color from green to blue and adopting a unified graphic treatment for its logo that includes MMC�s other operating companies.

The new brand initiative is designed to communicate the strength of Guy Carpenter, while presenting a more holistic view of the breadth of MMC�s resources and services.

In addition, Guy Carpenter announced that it will be changing the name of MMC Securities to GC Securities to better reflect its alignment with the firm and its Investment Banking Specialty Practice.

To view the new Guy Carpenter �Capital Ideas� ads, please visit http://www.guycarp.com/portal/extranet/press/advertising.html. More information on �Capital Ideas� is also available at http://www.gccapitalideas.com.

Guy Carpenter & Company, LLC is the world�s leading risk and reinsurance specialist and a part of the Marsh & McLennan Companies. Guy Carpenter creates and executes reinsurance and risk management solutions for clients worldwide through 2,600 professionals across the globe. The firm’s full breadth of services includes 16 centers of excellence in Accident & Health, Agriculture, Alternative Risk Transfer, Environmental, General Casualty, Investment Banking*, Life & Annuity, Marine & Energy, Professional Liability, Program Manager Solutions, Property, Retrocessional, Structured Risk, Surety, Terror Risk, and Workers Compensation. In addition, Guy Carpenter�s Instrat® unit utilizes industry-leading quantitative skills and modeling tools that optimize the reinsurance decision-making process and help make the firm�s clients more successful. Guy Carpenter�s website address is www.guycarp.com.