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

Warren Buffett's Berkshire Hathaway took a $1.6 billion stake in UnitedHealth Group in Q2 2025, sending shares up over 9% after hours. The stock trades near a decade-low valuation at 12 times earnings after plummeting 46% year to date amid federal probes and surging medical costs.

While the "vote of confidence" from Buffett's investment validates the long-term value of UnitedHealth shares, the "management needs to regain trust and credibility with investors, and get back to its beat and raise reputation of the past," said James Harlow, senior vice president at Novare Capital Management.