Under his leadership, Apple has seen remarkable growth and profitability Investopedia / Alex Dos Diaz Tim Cook is the chief executive officer (CEO) of Apple, one of the largest companies in the world.

There are rumors that Tim Cook will retire. There are other rumors that he will not. He has led Apple (NASDAQ: AAPL) since 2011, succeeding Steve Jobs. He is 65, which is a traditional retirement age.

Apple’s 50th anniversary is next month on April 1, and alongside teasing planned celebrations that are coming, CEO Tim Cook just published a new letter marking the major milestone. Apple CEO Tim Cook ...