David Sokol, the chief of MidAmerican Energy who saved Constellation Energy from bankruptcy in the thick of the 2008 financial crisis, has abruptly resigned from Berkshire Hathaway, MidAmerican's owner. Sokol was the guy who negotiated with Constellation boss Mayo Shattuck and extracted a huge ransom from Constellation shareholders for the rescue.
Andrew Ross Sorkin reports some stock transactions by Sokol that might be perceived as front-running Berkshire shareholders. Berkshire recently announced it would buy Lubrizol, and Sokol had been buying Lubrizol stock earlier. Sorkin:
Here is an excerpt from a good Fortune profile of Sokol after his staredown with Shattuck: