~250, depending on source

https://www.oxfamamerica.org/explore/research-publications/b...

> California’s 246 billionaires saw their collective wealth increase by $487.2 billion (31%) between March 2025 and March 2026. They are now worth $2.061 trillion. The richest billionaires are doing even better. As of March 2026, the 10 wealthiest California billionaires are worth $1.045 trillion — a $338.4 billion (48%) increase — from March 2025.

They already are moving out, and moving their business headquarters with them. The population has been declining for years, but considering how far behind the state is on approving housing construction, and the declining refinery and power generation capacity, it'll take many decades before it becomes affordable.