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.

Some of the Oracle of Omaha's most-popular buys -- as well as Berkshire's largest holding -- offer robust upside potential in 2025.

Warren Buffett is one of the better-known and successful investors. Despite being a long-held position of Berkshire and a globally known iconic brand, the company's growth track and financials indicate it is not likely to serve new investors as well as it did Buffett and his team.