According to a recent 13F filing, Berkshire Hathaway now owns 5 million shares of UnitedHealth Group. Shares of health insurer UnitedHealth Group (UNH -1.38%) received a boost last week after investors learned that Warren Buffett's company, Berkshire Hathaway (BRK.A 1.28%) (BRK.B 1.35%), has invested in it. It has been a tumultuous year for UnitedHealth, which has seen its shares hit multi-year lows due to underwhelming quarterly results and a barrage of bad news. Entering trading this week, UnitedHealth st ...

UnitedHealth Group (UNH -0.01%) has been a solid dividend growth stock for years. Generally, its yield has been fairly low, due to the stock's rising value. Even as the healthcare insurance giant has grown its dividend, its yield hasn't been particularly high or noteworthy. However, with shares of UnitedHealth in a tailspin of late, that's changed. Entering trading this week, the stock's yield was around 3.5% -- close to three times the S&P 500 average of 1.2%. That's not typical for UnitedHealth. Could thi ...