Berkshire’s David Sokol Resigns After Stock Purchase

David Sokol, widely seen as Warren Buffett’s leading heir apparent at the helm of Berkshire Hathaway (BRK.A), defended himself Thursday morning after resigning unexpectedly amid revelations about his personal stock trading. In an unusual and personal announcement Wednesday evening, Mr. Buffett said that Mr. Sokol, chairman of Berkshire Hathaway units MidAmerican Energy and NetJets, had [...]