Tech billionaires are spending unprecedented sums in California races. Experts say it’s the tip of the iceberg
Tech billionaires are flooding California races with hundreds of millions, led by Sergey Brin and Chris Larsen, to shape taxes and regulation.
Intelligence analysis by GPT-5.4 Mini

Silicon Valley donors are pouring money into California’s primary, local races and ballot fights to influence taxes, regulation and political power as AI competition heats up. The Guardian says the disclosed spending may be only a slice of the total.
Big tech people are pouring huge piles of money into California elections. They want to help pick leaders and rules that could affect how their businesses grow.
Sergey Brin and Chris Larsen are two of the biggest spenders. It is like cheering for different teams in a giant school election, except the cheering is done with ads, donations, and special groups.
The worry is that rich donors may get more say than regular voters. The article says some of the money may be hidden too, so the full picture could be bigger than what people can see.
Analysis
What the article shows
California’s June 2 primary has become a major spending battleground, with tech billionaires, executives and their political groups backing candidates and ballot measures across the state. The Guardian says Sergey Brin has spent $66m since January to fight a billionaire tax, while Chris Larsen has put $26m into three Super PACs. Google and Meta have also backed a $10m Super PAC aimed at assembly and senate races.
Why California matters
The article frames this as a fight for political and regulatory leverage, not just a few individual races. A Berkeley public policy professor says the money is aimed at politicians who can shape the regulatory agenda for the next five years. The companies’ interest is tied to AI: the article says they want favorable officeholders so they can grow quickly without tougher rules slowing them down.
Who is getting the money
Matt Mahan, the San Jose mayor running for governor, has emerged as the tech industry’s preferred candidate and has drawn nearly $50m in contributions. Yet the article says the spending has not translated into broad momentum; polls put him at 4%, and one Brin-backed Super PAC has already shut down.
The bigger picture
The Guardian also points to lobbying as another channel of influence. CalMatters found the tech industry spent $39m lobbying California in 2025, while Bloomberg found the biggest tech and AI firms spent $109m on federal lobbying that year. The article’s core warning is that public filings may show only part of the effort, because dark-money groups can hide additional influence.
Key points
- Tech billionaires and companies have poured hundreds of millions into California races ahead of the June 2 primary.
- Sergey Brin has spent $66m to oppose a billionaire tax, while Chris Larsen has funded three Super PACs with $26m.
- Google and Meta have jointly backed a $10m Super PAC for state legislative races.
- Matt Mahan, the San Jose mayor, has become the tech industry's favored governor candidate and has received nearly $50m in donations.
- Experts say the disclosed spending may be only part of the influence effort because dark money can be harder to trace.
If the money helps elect officials who can set clearer rules, tech companies say they could expand faster with less uncertainty. The tax fight could also keep attention on how education, food assistance and healthcare are funded if voters support those programs.
The article warns that disclosed spending may be only the visible layer, with dark-money groups likely adding more hidden influence. That raises the risk that a small number of wealthy donors shape taxes, regulation and local races more than ordinary voters do.



