Google co-founder Sergey Brin has spent more than $100 million to oppose California’s proposed “billionaire tax,” known as Proposition 40 (Prop 40), ahead of a November vote. The proposal would levy a one-time tax on the net wealth of the state’s richest residents.
According to reporting from multiple outlets, Prop 40 would impose a 5% wealth tax on California’s roughly 200 billionaires. Brin’s spending is part of a broader campaign against the measure, with his contributions cited as surpassing $100 million. The outlets focus on the scale of Brin’s involvement and the basic structure of the initiative: a single, statewide tax on net worth for qualifying billionaires.
While both sources describe the same proposal and spending level, their emphasis differs slightly—one highlights Brin’s total spend in the context of a specific November timeline, while the other frames the initiative’s mechanics more directly by restating the 5% one-time approach.
