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 Berkshire Hathaway is buying the rest of its utility unit from the estate of a longtime board member who died three years ago,