Warren Buffett's company, Berkshire Hathaway Inc., purchased 1.13 million more shares of DaVita HealthCare Partners this week, CNBC reported. Berkshire's total stake in the company is 37.62 million shares, or 17.7%.

Berkshire Hathaway paid between $66.12 and $68 a share for the shares, according to CNBC.

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