Warren Buffett and Greg Abel Quietly Hold a Bigger Percentage of This Company Than Any Other in Berkshire's Portfolio (Hint: It's Not Apple or American Express)

Berkshire Hathaway holds nearly 45% of DaVita, a kidney dialysis healthcare company, representing its largest proportional equity stake—larger than Apple or American Express. Despite recent modest sell-offs in 2025, DaVita has surged over 56% year-to-date, driven by strong Q1 earnings that beat analyst expectations. The company offers consistent profitability, revenue growth, and an attractive forward P/E ratio of just over 12.