Investing.com -- Shares of Unitedhealth Group (NYSE: UNH) surged 7% after-hours Thursday after Warren Buffett’s Berkshire Hathaway showed a new 5 million shares stake in the beleaguered healthcare provider. The value of the stake is $1.37 billion based on Thursday’s closing price.

Berkshire also added several other new positions, including a 6.6 million share stake in Nucor Corp (NYSE: NUE), a 1.5 million share stake in homebuilder DR Horton Inc (NYSE: DHI), a 780K share stake in Allegion PLC (NYSE: ALLE), and a 1.2 million share stake in Lamar Advertising Company (NASDAQ: LAMR).

The conglomerate lowered its massive stakes in Apple, Bank of America, Charter, and DaVita, while adding to Chevron, Constellation Brands, Domino’s, HEICO, Lennar, and Pool Corporation.