Tim Cook 's 65th birthday is on the horizon (Nov. 1, to be exact), and with the Apple CEO's special day looming, talks have allegedly been building within the company regarding his potential successor. To be clear, Cook has made no official public mention of retirement or stepping down. But according to Bloomberg's Mark Gurman, the tech giant is working behind the scenes to ensure a seamless transition when the time comes.

Cook replaced Steve Jobs in 2011, and after a period of uncertainty, Cook ushered Apple into its most profitable era. Stock-watching website Stocktwits reports that the company's stock increased about 1,800% since Cook took over leading the company.

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