Carl Icahn, billionaire investor and chairman of Icahn Enterprises Holdings LP, stands outside of the Nasdaq MarketSite in New York, U.S., on Tuesday, March 27, 2012. Icahn announced his intention last month to offer $30 a share and give CVR Energy Inc. holders a right to as much as an additional $7 a share, a proposal that values the company at at least $2.6 billion, according to Bloomberg calculations. Photographer: Scott Eells/Bloomberg *** Local Caption *** Carl Icahn Photo: Scott Eells, Bloomberg