Credit: Reuters/Chip East/Files (UNITED STATES - Tags: BUSINESS HEADSHOT) - RTR1R80L
Investor Carl Icahn speaks at the Wall Street Journal Deals & Deal Makers conference at the New York Stock Exchange in this June 27, 2007 file photograph. For now, William Ackman is getting the better of Carl Icahn in a well-publicized grudge match between the billionaire investors over Herbalife Ltd.
The billionaire, with a reputation for pushing aggressive corporate change, said on Twitter he discussed a larger buyback program with Chief Executive Officer Tim Cook.
"Had a nice conversation with Tim Cook today. Discussed my opinion that a larger buyback should be done now," Icahn tweeted.
(Reporting by Edwin Chan; Editing by Carol Bishorpic)