Under the leadership of its legendary chief executive officer, Warren Buffett, Berkshire Hathaway has become one of history's most successful companies and delivered stellar returns for long-term shareholders.

Warren Buffett's Berkshire Hathaway is buying the rest of its utility unit from the estate of a longtime board member who died three years ago, but it's not clear exactly how much it will pay for the 8% stake.

Buffett was down on the utility industry's prospects in this year's letter to Berkshire Hathaway shareholders. But it's not clear what the current value of the utility divisions shares are today.

Warren Buffett's company sold another $130 million of HP stock in three days, and has now slashed its position by about 17% in under four weeks.

Warren Buffett's Berkshire Hathaway is buying the rest of its utility unit from the estate of a longtime board member Walter Scott Jr., who died three years ago.

Berkshire Hathaway Energy said in a regulatory filing Tuesday that it will pay Walter Scott's family $2.4 billion cash and issue a number of Class B Berkshire shares that are equi