Ultra-wealthy people are over-represented in California compared to the rest of the USA. 100 of the Forbes top 400 are in CA [1], but the state only has about ~12% of the US population [2], and accounts for ~15% of the US GDP.

[1]: https://www.forbes.com/sites/angelauyeung/2020/09/08/golden-...

[2]: https://en.wikipedia.org/wiki/List_of_states_and_territories...

[3]: https://en.wikipedia.org/wiki/List_of_states_and_territories...