News: December 30, 2010

ARGENTA ANNOUNCES SALE OF CERILLIANT CORPORATION TO SIGMA-ALDRICH CORPORATION (Nasdaq: SIAL)

Transaction: Argenta Partners completed the sale of Cerilliant Corporation of Round Rock, Texas to Sigma-Aldrich Corporation (Nasdaq: SIAL) on December 30, 2010. The Company was originally acquired by Argenta in August of 2000. Under the guidance of CEO Sherri Pogue, a former partner of Argenta, Cerilliant grew to be recognized as a premier provider of analytical reference standards used in a broad range of test laboratories. Sherri will remain as Director of the Round Rock operation. Sigma-Aldrich was motivated by the opportunity to strengthen the Company’s analytical chemistry product portfolio and to continue to deliver on its strategic growth targets in the analytical chemistry sector. The successful exit generated a gain of 27 times the initial equity investment and produced an IRR of 38%. Argenta was advised by Prestwick Partners on the transaction.

About Sigma-Aldrich Corporation: Sigma-Aldrich is a leading Life Science and High Technology company committed to Enabling Science to Improve the Quality of Life. Its chemical and biochemical products and kits are used in scientific research, including genomic and proteomic research, biotechnology, pharmaceutical development and as key components in pharmaceutical, diagnostic and other high technology manufacturing. The Company has customers in life science companies, university and government institutions, hospitals, and in industry. Over one million scientists and technologists use its products. Sigma-Aldrich operates in 40 countries and has 7,700 employees providing excellent service worldwide. For more information about Sigma-Aldrich, please visit the Company’s website (www.sigma-aldrich.com).