UnitedHealth Group (UNH) stock has been a major underperformer in 2025, with UNH down nearly 50% year-to-date amid rising medical costs, regulatory scrutiny, and a Department of Justice investigation into billing practices. However, the company received a major vote of confidence after the closing bell today, when Warren Buffett's Berkshire Hathaway (BRK.A) (BRK.B) disclosed a substantial new position in UnitedHealth totaling 5.04 million shares, valued at approximately $1.57 billion.
As a result, UNH stock has surged over 8% in after-hours trading. That puts UnitedHealth on pace to challenge its overhead 50-day moving average in Friday’s session. The shares haven’t closed above this descending trendline since mid-April.
