Google co-founder Sergey Brin told Newsom he was leaving California over proposed billionaire tax

Google co-founder Sergey Brin walked up to Gov. Gavin Newsom at an exclusive holiday gathering last December and delivered a message no California governor wants to hear from one of the state’s richest residents: he was moving out.

The confrontation happened at a “treehouse party” hosted by crypto investor Chris Larsen just north of San Francisco. Brin, whose net worth approaches $289 billion, told Newsom directly that a proposed 5% tax on billionaire wealth was driving him from the state, Fox Business reported.

Newsom reportedly left the party complaining about a “lingering cold” he attributed to the interaction, one he said stuck with him for months afterward. The chill, it turns out, was more than physical. Brin has since purchased properties in Nevada and Florida and committed at least $58 million this year to defeating the ballot measure that pushed him out.

The tax that spooked Silicon Valley

The measure at the center of the dispute is the Billionaire Tax Act, which would impose a one-time 5% excise tax on individuals with a net worth exceeding $1 billion. If approved by voters this November, anyone who was a California resident on January 1, 2026, would owe the tax. Revenue from the measure would be directed toward healthcare, education, and food assistance, Newsmax reported.

The Service Employees International Union, United Healthcare Workers West, or SEIU-UHW, said it collected more than 1.55 million signatures to put the measure on the ballot, nearly double the roughly 875,000 required. Certification is still pending.

For a state already struggling with a pattern of fiscal mismanagement, the timing is remarkable. California depends heavily on its wealthiest residents to fund state services. The top 1% of earners pay a wildly disproportionate share of state income taxes. Chasing those taxpayers out the door is not a policy disagreement, it is an existential fiscal risk.

Brin fights back, and leaves

Brin did not simply relocate and stay quiet. He committed at least $45 million to Building A Better California, the main opposition group fighting the initiative. His total spending to defeat the tax reached $58 million this year.

In a statement to the New York Times, Brin framed the stakes in personal terms:

“I fled socialism with my family in 1979 and know the devastating, oppressive society it created in the Soviet Union. I don’t want California to end up in the same place.”

That is not the language of a man negotiating. It is the language of a man who has already made his decision. Brin bought a lakeside mansion in Nevada and additional property in Florida, according to the New York Post. Neither state levies a personal income tax.

The broader trend is stark. Since January, an estimated $1 trillion in capital has left California. Whether that figure captures all the indirect damage, the startups that chose Austin over San Jose, the venture funds that quietly redomiciled, is another question entirely.

Newsom opposes the tax but owns the environment

To his credit, Newsom has publicly opposed the billionaire tax. In a Politico interview, the governor warned that the consequences were already visible.

“The evidence is in. The impacts are very real, not just substantive economic impacts in terms of the revenue, but start-ups, the indirect impacts of… people questioning long-term commitments, medium-term commitments.”

He added: “That’s not what we need right now, at a time of so much uncertainty. Quite the contrary.”

Newsom also told the New York Times he was confident the measure would fail. “This will be defeated, there’s no question in my mind,” he said. “I’ll do what I have to do to protect the state.”

But opposing a single ballot measure does not erase the policy environment that made the measure possible. California already carries the nation’s highest top marginal income tax rate. Its regulatory burden is legendary. Its boondoggle infrastructure projects consume billions with nothing to show for them. The billionaire tax did not emerge from nowhere. It emerged from a political culture that treats wealth creation as a problem to be solved rather than a condition to be preserved.

SEIU-UHW and its allies collected nearly twice the signatures needed. That tells you something about the appetite among California’s activist class for punitive taxation, and about the political ground Newsom is trying to defend.

A pattern of consequences California’s leaders refuse to see

Newsom himself described the dynamic plainly. “This is my fear,” he said. “It’s just what I warned against. It’s happening.”

He is right that it is happening. But the governor’s warning rings hollow when his administration has presided over the very conditions that make capital flight rational. A state that aggressively taxes the wealthy while failing to deliver basic competence in budgeting, public safety, and infrastructure gives its richest residents every reason to leave, and almost no reason to stay.

The Billionaire Tax Act may or may not survive the ballot. Brin’s $58 million war chest will make it a fight. But the deeper problem is not one initiative. It is a governing philosophy that treats productive citizens as revenue targets while excusing institutional failure at every level.

Newsom’s administration has faced setbacks on multiple fronts, from federal court losses over immigration enforcement to persistent questions about how the state manages its books and its jails. The billionaire exodus is not an isolated event. It is the predictable result of a state that demands more and more from the people who fund it while delivering less and less in return.

Sergey Brin did not sneak out of California. He walked up to the governor at a party and told him to his face. That Newsom still seemed caught off guard tells you everything about how Sacramento processes bad news.

When a man worth $289 billion looks you in the eye, tells you he is leaving, and then spends $58 million to make sure nobody else gets trapped on the way out, that is not a warning. That is a verdict.