Warren Buffett's Berkshire Hathaway has acquired 5 million shares in UnitedHealth Group , a regulatory filing showed on Thursday, sending the health insurer's stock up 7% in extended trading.

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.

UnitedHealth Group Inc. and Elevance Health Inc. told Colorado regulators they will exit some individual health plans in the state, the latest sign of instability in the Affordable Care Act marketplaces.

Shares of UnitedHealth Group are surging before the market open Friday as Warren Buffett's Berkshire Hathaway disclosed that it recently purchased shares of the beleaguered insurer.

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

Health-insurance giant said it was making a number of governance changes, including the appointment of a new lead independent director and the formation of a public responsibility committee.

Previously, in June 2025, UnitedHealth Group Incorporated (NYSE:UNH) raised its quarterly dividend rate by 5% to $2.21. During the second quarter of 2025, UnitedHealth Group Incorporated (NYSE:UNH) returned $4.5 billion to shareholders in the form of dividends and share repurchases.

UnitedHealth Group completed its $3.3 billion purchase of Baton Rouge-based Amedisys Thursday morning, more than two years after plans to join the nation's two largest home health and hospice care companies were first announced.