His compound rate of wealth increase, post paying taxes on the sale, is around ~7.5%. That beats the S&P 500 over that time, which very few professional money managers can do.

$1.1 billion to $4.08 billion [1].

His primary business holding, the Dallas Mavericks, has increased in value from $285 million to $1.9 billion [2] (per the latest Forbes estimate). For that investment, he has seen a rate of value increase of about 11% per year. That investment stomps the S&P 500 massively (which was at ~1400 when the acquisition closed).

[1] https://www.bloomberg.com/billionaires/profiles/mark-cuban/

[2] https://www.forbes.com/sites/kurtbadenhausen/2018/02/07/nba-...