Speaking on cable television CNBC, Icahn said that he hopes other shareholders will join him in appealing to the company to buy back more stock. He also said that Apple CEO Tim Cook agrees with him that the company is undervalued.

In April Apple raised its share repurchase authorization to $90 billion from $60 billion announced a year earlier.

Icahn called the iPhone6 a "watershed event" for the company.

(Reporting by Svea Herbst-Bayliss; Editing by Chizu Nomiyama)