UnitedHealth Group has attracted major contrarian investors like Buffett, Burry, and Simons. Click here to read why UNH stock is a Buy.

Year to date, the stock has fallen by nearly 45%, which is by no means normal for the healthcare stock. In fact, this is the worst it has performed since the Great Recession, when it tumbled by more than 54% in 2008.

Berkshire’s Big Bet on UnitedHealth Berkshire Hathaway’s (NYSE:BRK-A)(NYSE:BRK-B) release yesterday of its latest 13F filing sent ripples through the market as it revealed a new 5 million share stake in UnitedHealth Group (NYSE:UNH) worth approximately $1.

Warren Buffett, Michael Burry and Andrew Left may not always agree on which stocks have good valuations. The three are all long UnitedHealth stock.

UnitedHealth Group is scheduled to report second-quarter results ahead of the opening bell on Tuesday, with markets expecting the health insurance giant's stock to make a substantial move by the end of the week.

Bloomberg journalists discuss today's biggest winners and losers in the stock market. Listen for analysis on the companies making news on Wall Street.

UnitedHealth Group (NYSE: UNH) is a top health care stock with recent turbulence in earnings guidance, rising costs, and hedge fund activity.

UnitedHealth Group Inc. (NYSE:UNH) shares climbed Friday after high-profile investors Michael Burry and Warren Buffett took positions in the insurance giant, offering some relief to a stock that has tumbled about 41% year-to-date.