- Cook was asked to join Apple by Jobs in 1998.
- After Jobs resigned as CEO and became chairman of the board, Cook was named CEO of Apple Inc. on August 24, 2011. Six weeks later, on October 5, 2011, Jobs died due to complications from a relapse of his previously treated islet-cell neuroendocrine pancreatic cancer.
- As Apple Inc. CEO, Cook regularly begins sending emails at 4:30 a.m. and previously held Sunday-night staff meetings by telephone to prepare for the next week. Cook shared the keys to his leadership at Apple in May 2013: people, strategy, and execution; he explained, "If you get those three right the world is a great place." Under Cook's leadership, Apple has increased its donations to charity, and in 2013, he hired Lisa Jackson, formerly the head of the Environmental Protection Agency, to assist Apple with the development of its renewable energy activities