Warren Buffett named Greg Abel, 61, as his successor at Berkshire Hathaway back in 2021. Abel started out as an accountant, before taking the reins as CEO of Berkshire Hathaway Energy. The Canadian businessman is currently chair of Berkshire Hathaway Energy and vice chair for non-insurance operations at Berkshire Hathaway. Abel took over the reins of MidAmerican in 2008, which was renamed Berkshire Hathaway Energy in 2014. Abel's tenure as Berkshire Hathaway Energy's CEO would last for two decades until he stepped down in 2018.

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