Warren Buffett has done what he can to prepare his successor at Berkshire Hathaway. But there is one thing that can’t be simply handed off: the Buffett brand.

Buffett, one of the world’s richest people and most accomplished investors, took control of Berkshire Hathaway in 1965 when it was a textiles manufacturer. He turned the company into a conglomerate by finding other businesses and stocks to buy that were selling for less than they were worth.

As the two-hour afternoon session of Berkshire Hathaway’s annual shareholder meeting wound to a close, the conglomerate’s chief of 60 years declared that he’d just gotten the “five-minute warning, exclamation point,