U.S. investor Carl Icahn offered to take Clorox private in a $12.6 billion deal, a regulatory filing indicated. In a letter sent Thursday to Clorox Chief Executive Officer Don Knauss, Icahn said the offer represents a 21 percent premium to the company's share price on Dec. 20, 2010, the day before Icahn began his investment in the company, CNNMoney.com reported. Shares of the cleaning products maker jumped 12 percent before the opening bell Friday, trading at one point to $76.50, CNNMoney said. The stock closed at $68.43 a share Thursday. Clorox competes with Procter and Gamble, Colgate Palmolive, Kimberly Clark and Johnson and Johnson in the cleaning products field.