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Google Co-Founder Sergey Brin Spends Over $100 Million to Fight California Billionaire Tax

Google co-founder Sergey Brin has donated another $20 million to oppose California's proposed billionaire tax, bringing his total spending past the $100 million mark.

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Inewgen
11 Aug 2026Source: TechCrunch2 min read (0 views)
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Google Co-Founder Sergey Brin Spends Over $100 Million to Fight California Billionaire Tax

Stock photo for illustration only, not from the actual event

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  • Sergey Brin's total spending to block the billionaire tax has now exceeded $100 million.
  • The latest contribution added another $20 million to the advocacy group Build a Better California.
  • The massive spending aims to avoid an estimated tax liability of around $13.3 billion.
  • California voters are scheduled to cast their ballots on Prop 40 this coming November.

Google co-founder Sergey Brin, currently ranked as the world's fourth-richest individual with a net worth hovering around $267 billion, has escalated his financial pushback against regional taxation policies. According to a recent regulatory filing, Brin has provided an additional $20 million donation to Build a Better California, an organization actively campaigning against the state's proposed billionaire tax.

This fresh infusion of funds means the tech billionaire has now poured more than $100 million out of pocket to sidestep an estimated $13.3 billion tax payment that would otherwise be levied against him.

$100M+Total spent by Sergey Brin against the tax
$13.3BEstimated tax bill Brin aims to avoid

Voters across California will head to the polls in November to decide on Prop 40. The organization backed by Brin has put forward opposing ballot measures which, if successfully passed, could effectively block Prop 40 by restricting the implementation of any newly introduced taxes.

Utilizing ballot measures and political funding to counter aggressive state taxation is a high-stakes strategy often deployed by ultra-high-net-worth individuals facing massive wealth levies. The direct involvement of a prominent tech titan like Google's co-founder highlights the intensifying clash between Silicon Valley wealth and government efforts to tax the ultra-rich. November's vote on Prop 40 will serve as a crucial bellwether for future tax policy battles in the United States.

San Francisco California street view

Stock photo for illustration only, not from the actual event

Source: TechCrunch

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