Founded in 1976, Apple (AAPL) became the first U.S. corporation to surpass $1 trillion in market capitalization in 2018. The company’s spectacular growth in sales, profits, and share price was historically driven by solid sales of its iPhone products.
But as sales of the popular smartphone and other technology hardware devices slowed down in late 2018, the company made aggressive efforts to transform itself into one of the world’s leading providers of digital services.
The effort paid off. The company’s services segment is the second-largest net sales group after the iPhone. As of Jan. 1, 2026, Apple has a market cap of over $4 trillion and is the second-largest company in the world.
But what are the company’s most popular and most successful business segments? This article examines Apple’s most profitable business lines and how they contribute to its success.
