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.

Berkshire Hathaway invests $1.57B in UnitedHealth (UNH), boosting shares by 10.5%. Discover key insights on its challenges, outlook, and analyst ratings.

Berkshire Hathaway’s portfolio added six new stocks, including the three new secret stocks. Warren Buffett was a net seller of stocks for the eleventh straight quarter.

Renaissance Technologies is often referred to as the most successful hedge fund of all time. From 1998 to 2021, the firm’s Medallion Fund generated annualized after-fees returns of 39%. Despite the company’s legendary leader,

Berkshire Hathaway just disclosed that it dumped $1.6 billion into a sinking ship, and Wall Street instantly paid attention.

UnitedHealth (UNH) stock climbed 6.7% in Thursday afternoon trading after Warren Buffett's Berkshire Hathaway (BRK.B) (BRK.A) disclosed that it acquired a new stake in the health insurer during Q2 2025.

Warren Buffett’s Berkshire Hathaway (NYSE: BRK.B) just revealed its highly anticipated buys and sells of Q2 2025. Understandably, all the focus is on the Oracle of Omaha’s purchase of more than 5 million shares in UnitedHealth Group (NYSE: UNH).