Google co-founder Sergey Brin has now spent $100 million to fight California’s proposed billionaire tax—he could owe $13 billion if he loses | Fortune0

• bond-market, Business, Business / Artificial Intelligence, Business / Big Tech, Business / Companies, Business / Computers and Software, Business / Markets, Business / Social Media, business-idea, business-insider-today, business-strategy, CoECI News, E! Insider, Energy & Environment Newsletter, Finance, Gaming News Roundup, Gear / Gear News and Events, Global, Global Precipitation, global warming, globalstar, HEALTH, Home, House, insider-picks, insider-picks-guides, insider-reviews, insider-reviews-2021, insider-today, job-market, Latest, Markets, Markets & Festivals, News, newsletter, Newsletters, Nexstar Media Wire News, North America, People News, Personal Finance, personal-finance, Photovogue / Editorial / News, Politics / Politics News, Property / News, Reviews, reviews-rit-ads, Security / Security News, shop, Shop Beauty
• August 11, 2026

Google co-founder Sergey Brin has now spent more than nine figures combating California’s proposed wealth tax. According to a filing from Friday, Brin donated an additional $20 million to Building a Better California, a PAC and political advocacy organization opposing the state’s billionaire tax and supporting other pro-business policies and housing and infrastructure affordability. He