Rosetta Stone (NYSE:RST) provides language learning and instruction software via CD-ROMs to individuals, corporations and schools. The company's initial public offering (IPO) of stock on 15 April 2009 was priced above the estimated $15 to $17 range set by lead underwriters Morgan Stanley and William Blair & Co. After its first full day of trading on April 16th, 2009, the company's stock closed at $25.12, up 39% from its $18 opening price. Rosetta Stone is the best performing IPO in the U.S. since fertilizer company Intrepid Potash rose 58% on its debut in April 2008. It is also the first IPO to price above its estimated range since Colfax Corporation went public in May 2008. In total, 6.25 million shares were sold, raising about $113 million in capital and leaving the company at a market capitalization of $315 million.