Try again By submitting you agree to our Terms of Service Your Take contributions have not been reviewed for accuracy by USA TODAY. Contributors agree to our Terms of Service and are responsible for the content of their videos and photos. Please report any content that violates the terms. This story is part of Apple Inc Alistair Barr, USA TODAY 5:45 p.m. EST January 23, 2014 Activist buys another $500 million of Apple stock, adding to a $500 million purchase made in recent weeks. That brings his total stake in Apple to about $3.6 billion. Carl Icahn arriving at the 32nd annual New York City Police Foundation Gala in New York in October 2012. (Photo: Henny Ray Abrams, AP) SHARE 27 CONNECT 18 TWEET 6 COMMENTEMAILMORE SAN FRANCISCO – Carl Icahn bought another pile of Apple stock on Thursday as the activist investor released an open letter to other shareholders of the technology giant arguing for a bigger buyback. Icahn said in the letter that his investment firm bought $500 million of Apple stock on Thursday, adding to a $500 million purchase made in recent weeks.