Not OP, but one example I can think of: Jeff Bezos moved from Washington state to Florida two years after Washington enacted a 7% capital gains tax "on the sale or exchange of long-term capital assets such as stocks, bonds, business interests, or other investments and tangible assets"[1] which "reportedly helped him save $1 billion in taxes."[2]

[1]: https://dor.wa.gov/taxes-rates/other-taxes/capital-gains-tax

[2]: https://finance.yahoo.com/news/jeff-bezos-moved-florida-impa...

There's plenty of studies on this. There's unsurprisingly a modest but statistically significant migration of millionaires from high-tax to low-tax jurisdictions.

https://www.asanet.org/wp-content/uploads/attach/journals/ju...

It’s not really hard to see such a migration if you simply follow the money. See [0] and [1]

[0] https://www.forthcapital.com/uk/articles/2025-wealth-migrati...

[1] https://www.henleyglobal.com/publications/henley-private-wea...