California's four richest billionaires could face a combined wealth tax liability of approximately $42.8 billion (£32.12 billion) under a proposal going before voters on 3 November.
Sergey Brin, Jensen Huang, Larry Page and Mark Zuckerberg account for about 40% of an estimated $107 billion total (£80.32 billion), according to a Los Angeles Times analysis. That projection draws on Forbes wealth estimates from 16 October, rather than official tax assessments.
