Since launching a new stake in the U.S. oil producer Occidental Petroleum ( OXY -2.09%), Berkshire has bought the stock like there is no tomorrow. Occidental is the sixth-largest position in Berkshire's portfolio, and Berkshire now owns over 28% of outstanding shares.

Fact checked by Stella Osoba Warren Buffett has increasingly argued in recent years that it's not just the ubiquitous sports betting apps that have made your phone a pocket casino. In his 2024 annual letter to shareholders,

Buffett invested in Heinz in 2013 and two years later, Heinz merged with Kraft Foods. He bought 326 million shares during this merger at a cost of around $24.6 billion. He has held on to that stake, which is now worth $11.4 billion.

If you know anything about Warren Buffett, you probably greatly admire how he has increased the value of his company, Berkshire Hathaway, by an annual average of nearly 20% over close to 60 years. Buffett has bought many great companies outright and has invested in the stock of other companies.

Warren Buffett isn't known for his growth investing. Most experts would classify him as a value investor. But as Buffett has reminded us in the past, value investors aren't just about buying cheap stocks. They're interested in buying companies at a discount to their future valuation, even if that means paying a premium today.