Activist investor Carl Icahn told CNBC in an April 28interview that he has sold off his stake of less than 1% in which he bought in 2013.

Icahn cited worries about China's attitude towards Apple as the reason for hismove. The tech giant recently stoppedoffering its iBooks Store and iTunes Movies services in China as directed bythe state media regulator.

The Icahn Enterprises founder added that he called Apple CEOTim Cook to inform the latter of his decision.

Icahn previously notedthat the tech giant is "undervalued" and has his valuation on its shares to$240 per share from $216 per share.