The tech giant had relatively flat iPhone sales but increased its revenue thanks largely to higher-priced models including the iPhone X, with a list price of just under $1,000.
Apple Inc extended its post-earnings rally, gaining 2.9 percent and pushing its market value across the trillion-dollar threshold. "It's one of those things that does not mean anything by itself... it's more a testimony of the importance of Apple on the market".
He took over after the death of founder Steve Jobs, who was identified with launching many of Apple's most iconic products, including the iPhone smartphone and the iPad tablet.
Independent technology analyst Rob Enderle said Apple's trillion-dollar valuation defied financial trends in recent quarters and potential defeat in a legal battle with Qualcomm over mobile chips.
Robert Galbraith / Reuters Apple CEO Steve Jobs gestures during his unveiling of the iPhone 4 in San Francisco, Calif., June 7, 2010.
Jobs often presented almost the entirety of Apple's launch events, while Cook typically emcees, but hands product announcements to lieutenants like marketing head Phil Schiller, software chief Craig Federighi, and services lead Eddy Cue.
Although Apple has yet to produce another mass-market sensation since that changing of the guard, Cook has leveraged the legacy that Jobs left behind to stunning heights.
Cook hasn't escaped criticism, however. A boardroom battle resulted in Jobs' resignation from the company, and Apple began to falter. Since then 18 different iPhones have been launched and more than 1.2bn of the devices have been sold. Microsoft helps Apple survive with a $150 million investment. The company also boosted its revenue from services, including Apple Music and the app store.
He also catapulted Apple into new areas of politics, tech industry policy and environmental responsibility.
But that calculus changed under the administration of President Donald Trump, who pushed Congress to pass a sweeping overhaul of the USA tax code that includes a provision lowering this year's rate to 15.5 percent on profits coming back from overseas. The company's corporate tax rate was slashed and it's bringing hundreds of billions of overseas dollars back to the country.
As Apple continues to grow, its competitors seem to be struggling, like Facebook which had its single worst day in stock market history when it lost $120 billion in value last week, a more than 20 per cent drop.