Buffett's Berkshire Bets Big on Apple, American Express, and Alphabet

Warren Buffett's Berkshire Hathaway has significant investments in Apple (AAPL), American Express (AXP), and Alphabet (GOOG) (GOOGL). These three stocks make up more than half of the conglomerate's equity portfolio. Apple is the largest holding, accounting for around 22% of the portfolio.

Buffett favors Apple due to its strong compounding business model. The company generates predictable revenue streams from devices like iPhones and computers, as well as service revenue through a closed-garden ecosystem. This includes search revenue-sharing deals with Alphabet, commissions on app downloads, and subscriptions for services like cloud storage.

The recent introduction of Apple's foldable smartphone, the iPhone Duo, could become another growth driver for the company. American Express is another strong compounding business, making up over 17% of Berkshire's portfolio. The charge card provider has a high-end customer base and charges higher fees in exchange for perks and privileges.

Alphabet, Berkshire's third-largest holding at around 13%, has significant advantages due to its comprehensive AI stack, distribution channels, and ad network. The company's custom AI chips give it a cost advantage in the cloud space, enabling it to recoup its AI infrastructure spending within a year when using its own chips.