Berkshire Hathaway Has Nearly 14% of Its $359 Billion Portfolio Invested in This Winning Stock That's Doubled in 5 Years

American Express is Berkshire Hathaway's second-largest holding, representing nearly 14% of its $359 billion portfolio. The stock has doubled over the past five years and currently trades at a P/E ratio of 19.5, which analysts consider a compelling entry point. The company benefits from a strong economic moat, premium brand positioning targeting affluent customers, and tailwinds from the cashless economy, with management projecting 10% annual revenue growth and mid-teens earnings per share growth.