Buffett's Berkshire buys more DaVita shares By: CNBC.com News February 27, 2014 at 07:36 AM EST Warren Buffett's Berkshire Hathaway now owns about 17.7 percent of DaVita HealthCare after buying another 1.1 million shares. Read More >> Related Stocks: Berkshire Hathaway DaVita HealthCare Partner