Willis Group Holdings PLC : Willis North America Appoints Frank Castro Health Care Practice Leader

Industry Leading Talent to Drive Growth, Deliver Willis Cause

Willis North America, a unit of Willis Group Holdings (NYSE: WSH), the global insurance broker, today announced the appointment of Frank Castro as Health Care Practice Leader. Mr. Castro has been serving as Senior Vice President, Willis North America National Health Care Practice since 2007. He will report to Eric Joost, Chief Executive, Willis North America Specialties.

Mr. Castro assumes the position previously held by Mary Botkin who retired in November 2011. In this role, Mr. Castro will lead a team of over 150 health care insurance professionals to drive growth across the platform. He will work closely with Willis North America's regional retail offices to align resources and deliver industry leading solutions and service to more than 6,000 Willis health care clients.

Willis is an industry leader in the health care sector helping organizations across all segments of the health care industry assess and minimize risk, including: hospitals, health systems, physician groups and long-term care, managed care and miscellaneous health care facilities. Willis has a deep commitment to this sector and was the first major broker to establish a dedicated health care practice.

Based in Los Angeles, Mr. Castro joined Willis in 2006 and brings more than18 years of experience in the professional liability and specialty lines business. Previously, he co-led Willis' Managed Care practice, establishing Willis as a leader in this sector through a variety of thought leadership events including Willis' Annual Managed Care Forum.

Commenting on this appointment, Mr. Joost said, "Frank's strong track record and outstanding client focus will ensure we continue to build on the success of the Willis Health Care Practice. Willis' health care practice professionals truly understand their clients' needs and industries and stand ready to deliver the best solutions and services to all of our clients."

ABOUT WILLIS

Willis Group Holdings plc is a leading global insurance broker. Through its subsidiaries, Willis develops and delivers professional insurance, reinsurance, risk management, financial and human resource consulting and actuarial services to corporations, public entities and institutions around the world. Willis has more than 400 offices in nearly 120 countries, with a global team of approximately 17,000 employees serving clients in virtually every part of the world. Additional information on Willis may be found at www.willis.com.

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