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Billionaire activist investor Carl Icahn speaks during a Bloomberg Television interview at the Robin Hood Investors Conference in New York, U.S., on Tuesday, Oct. 21, 2014. Icahn said Warren Buffett is sometimes "way too easy" on companies in which his Berkshire Hathaway Inc. invests. Photographer: Peter Foley/Bloomberg via Getty Images

Billionaire activist investor Carl Icahn speaks during a Bloomberg Television interview at the Robin Hood Investors Conference in New York, U.S., on Tuesday, Oct. 21, 2014. Icahn said Warren Buffett is sometimes "way too easy" on companies in which his Berkshire Hathaway Inc. invests. Photographer: Peter Foley/Bloomberg via Getty Images