The biggest immediate changes will be that different people will be in control of the company's stock portfolio, and Abel will have power over Berkshire's $344 billion cash hoard. However, portfolio managers Ted Weschler and Todd Combs have been managing more of Berkshire's investments as the years have progressed.

What Happened: The undisclosed investments of Berkshire Hathaway have been made public. The company has reportedly invested in steelmaker Nucor NUE +1.07% Get Free Report , homebuilders D.R. Horton DHI +1.30% Get Free Report and Lennar LEN +1.56% Get Free Report , with the total investments amounting to $1.8 billion.

Key Takeaways Warren Buffett's Berkshire Hathaway increased its holdings in UnitedHealth Group stock.A regulatory filing showed Berkshire held 5 million shares in the second quarter.Berkshire also added positions in D.

The conglomerate sold Apple shares during the second quarter, though the iPhone maker remains Berkshire’s largest stockholding.

The investment comes as UnitedHealth faces soaring medical costs, federal investigations, the fallout of the killing of a top executive and a cyberattack last year.

See Berkshire Hathaway Inc.'s strategy with a big new stake in UnitedHealth. Learn how it's hedging against recession and stagflation. Click for my BRK.A update.

Housing experts weigh in on the state of mortgage rates and how the Federal Reserve may provide some relief by the end of the year.

Warren Buffett is the world’s most famous investor and is renowned for his sober, long-term approach to the substantial equity stakes he takes in companies. One of his best-known sayings about Berkshire Hathaway is,