Berkshire Hathaway’s $1 billion homebuilding investment indicates Warren Buffett’s confidence in a future U.S. housing market rebound.

Warren Buffett’s Berkshire Hathaway revealed a position in embattled healthcare giant UnitedHealth Group while showing smaller stakes in longtime holdings Apple and Bank of America, according to a regulatory filing Thursday.

However, a few well-known investors scooped up shares of the stock in the second quarter, including Warren Buffett's Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B). Buffett, through Berkshire, bought more than 5 million shares of the managed care company,