Warren Buffett's Berkshire Hathaway said on Thursday night it sold 203,091 shares of DaVita, reducing its holdings in the kidney dialysis services provider to about 35.89 million shares, a 45% stake worth nearly $6.

Shares of healthcare company DaVita (DVA) are down 11% on reports that Warren Buffett has reduced his holding of the stock.Maximize Your

Warren Buffett's Berkshire Hathaway has cut its stake in the dialysis provide DaVita Inc according to a U.S. SEC filing.

DaVita shares tumbled after issuing a weak outlook amid rising care costs, while big investor Berkshire offloaded some shares in a preplanned agreement.

Those investments generate additional profits from investment returns alongside the profits derived from the premiums it charges. The majority of Chubb's revenue and profits are derived from selling property and casualty insurance, with life insurance being the second largest growth driver for the business.