NEW YORK (GenomeWeb News) – One of the world’s largest hedge funds, Citadel Investment Group, has raised its stake in Affymetrix to 5.5 percent of the microarray firm’s outstanding stock.
 
Citadel reported in a US Securities and Exchange Commission earlier this week that it now owns 3,861,403 shares of Affy. That stake is up significantly from the roughly 827,000 shares Citadel held in the firm as of the end of 2007.
 

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