AN MEMC COMPANY

Bringing solar energy services to Canada and the world.

On November 23, 2009, MEMC completed the acquisition of Sun Edison LLC, North America’s largest solar energy services provider. MEMC, a global leader in the manufacture and sale of wafers and related intermediate products to the semiconductor and solar industries, pioneered the design and development of wafer technologies over the past 50 years. With R&D and manufacturing facilities in North America, Europe and Asia, MEMC enables the next generation of high performance semiconductor devices and solar cells. With the acquisition of SunEdison, MEMC is now a developer of solar power projects and North America’s largest solar energy services provider.

With one of the strongest brands in solar, SunEdison will continue to operate with the SunEdison name, as a subsidiary of MEMC.

MEMC’s common stock is listed on the New York Stock Exchange under the symbol “WFR”. For more information about MEMC, please visit www.memc.com.