Google co-founder Sergey Brin has now spent $100 million to fight the billionaire tax
California's Prop 40, would impose a one-time 5% tax on the net worth of the state's billionaires.
California's Prop 40, would impose a one-time 5% tax on the net worth of the state's billionaires.
This article was originally published at: https://techcrunch.com/2026/08/10/google-co-founder-serge...