Sergey Brin spends over $100 million to fight wealth tax.

The Google co-founder, and world’s fourth-richest person, has spent $102 million so far to put a stop to the one-time, five percent tax on the wealth of California billionaires, according to filings tallied by Bloomberg. California voters can have their say on Proposition 40 for free come November. Posts from this author will be added to your daily email digest and your homepage feed. Posts from this topic will be added to your daily email digest and your homepage feed. Posts from this topic will be added to your daily email digest and your homepage feed. Posts from this topic will be added to your daily email digest and your homepage feed. A free daily digest of the news that matters most. The Verge is a part of PMX Global, LLC, a subsidiary of Penske Media Corporation. © 2026 VM Publishing, LLC. All rights reserved. Sign in to see your notifications or create an account to join the conversation.