UnitedHealth Group TodayUNHUnitedHealth Group$309.00 +37.51 (+13.82$234.60▼$630.73Dividend Yield2.86$366.52Add to WatchlistThe long-running mystery around Warren Buffett’s latest stealth investment is finally over. In Berkshire Hathaway’s NYSE: BRK.B newest 13F filing, the Oracle of Omaha revealed a fresh stake in UnitedHealth Group Incorporated NYSE: UNH. Berkshire ended Q2 holding five million shares, valued at about $1.6 billion, a position it likely began buil ...