Investors know that Domino's is in the pizza business. But few are aware that the company generates most of its revenue from supply chain services. For context, in its fiscal third quarter of 2024, it had over $650 million in supply chain revenue, which was 60% of its total revenue.

Despite his immense wealth, Warren Buffett, as he admits, is a man of simple tastes. Perhaps that focus on basic American food staples inspired one of the more unexpected new buys from his investment vehicle Berkshire Hathaway (NYSE: BRK.