According to Forbes, Bill Gates lost the top spot awhile ago to Calos Slim Helu but Warren Buffett has taken the #1 spot with Berkshire Hathaway shares surging.

Graph of BRK-B shares 1997-present.
This is why people need to grasp the importance of buying for the long term. Buffet sits on a lot of the investments he buys. I’m not advocating investing in Berkshire and neither does Buffet advise you invest in Berkshire if your net worth is limited.