He has arguably the toughest act in Corporate America—following Warren Buffett. But now that Greg Abel officially has a timetable to take over Berkshire Hathaway by year-end, the question is: How will he run it?

Abel was named vice chairman of Berkshire Hathaway in 2018. Although he has been at the company for more than two decades, he is considered to be much more guarded and hands-on than Buffett.

Warren Buffett will step down as Berkshire Hathaway CEO at the end of 2025, paving the way for longtime successor, vice chairman Greg Abel, to take the reins.