DaVita

RANK271

Warren Buffett's Berkshire Hathaway is DaVita's largest shareholder, with a 33% stake in the company according to a recent filing. Buffett's faith in the company, a long-term holding, has been rewarded, as the company has delivered a 13% annual return to shareholders over the past decade. Patients from around the world come to DaVita's 2,500 treatment centers for kidney dialysis.