Billionaire Bankrollers: Meet the 22 California Billionaires Opposing Prop 40

On November 3, 2026, California voters will vote on Proposition 40, a one-time 5 percent levy on the net worth of billionaires who were California residents on January 1, 2026. Ninety percent of the revenue would fund health care programs, with the remainder set aside for food assistance and education.

A small segment of the state’s 200 plus billionaires has stepped up to oppose Prop 40, contributing millions to opposition groups and vocally speaking out against the one-time fee.

In a brief report, “California’s Billionaire Wealth Surge: Meet the Twenty-Two California Billionaires Opposing Prop 40 Billionaire Wealth Tax,” we identified twenty-two California billionaires who are active funders and outspoken opponents of Prop 40. Together they have given over $150 million to oppose the initiative — with more rolling in every day.  These twenty-two include a prince, several private jet flying chums of Jeffrey Epstein, and a bunch of crypto and tech bros designing the AI future for the rest of us.

On January 1, 2025, these twenty-two billionaires had a combined wealth of $439.8 billion. By September 1, 2026, their wealth had grown to $722.1 billion.

In a little under 20 months, their combined wealth increased $282.6 billion, a gain of over 64 percent.

Just to be clear, these “snowflake billionaires” are whining, wailing, and donating money to fight a tax that would effectively require them to part with one-eight of the wealth they’ve gained since January 1, 2025.

This group includes Google’s Sergey Brin who has been the single largest opposition donor, chipping in over $102 million to fight Prop 40. Brin has seen his wealth grow a whopping 70 percent in the last 20 months, from $148 billion on January 1, 2025 to $253 billion on September 1, 2026. Brin’s wealth is 83,498 times the median wealth of a Californian household, which is $303,000.

Palantir’s Peter Thiel gave $3 million to the No on 40 campaign and has called on other billionaires to move out of California. In the last 20 months, Thiel’s wealth increased a whopping 120.27 percent, from $14.8 billion on January 1, 2025 to $32.6 billion on September 1, 2026 (Forbes). Thiel’s wealth is 10,759 times the median wealth of a Californian household.

Chris Larsen, founder of cryptocurrency firm Ripple has given over $5 million to the No on Prop 40 Campaign, along with another $5 million from Ripple and $12 million to Building a Better California. His personal wealth increased 23.5 percent, from $10.2 billion to $12.6 billion in the last twenty months. His wealth is 4,158 times the wealth of the median California family.

Venture capitalist John Doerr gave $10 million to No On 40. In the last 20 months, Doerr’s wealth increased 47.97 percent, from $14.8 billion on January 1, 2025 to $21.9 billion on September 1, 2026. Doerr’s wealth is 7,227 times the median wealth of a Californian household.

Three of the twenty saw their wealth decline over this 20-month period: Tony Xu, Marc Pincus, and Marco DeGeorge. But most have experienced substantial gains.

California Billionaires vs. the Median California Household

The number of billionaires in California has grown, with their average wealth remaining roughly between $9.1 to $9.4 billion. As of September 1, 2026, the 231 billionaires identified as living in California have a combined wealth of $2.117 trillion. Just twenty months ago, there were 178 billionaires in California with a combined wealth of $1.685 trillion.

To show how quickly billionaire wealth has accelerated since the pandemic, let’s go back in time six years. In early 2020, all 815 billionaires residing in the United States had a combined wealth of $2.9 trillion, only slightly more than what the 231 California billionaires have today in 2026.

Meanwhile, the median net worth of a California household has risen a marginal 5.2 percent increasing $15,000 from $288,000 in 2025 to $303,000 in 2026. A Californian with $1 billion dollars in wealth has 303 times the wealth of the median California household. 

Under Prop 40, this billionaire will pay a one-time tax of $50 million to support healthcare, education, and food assistance for their fellow Californians leaving them $950 million to survive on.

The Under-Taxed California Billionaire

In California, the state’s 231 billionaires (as of Sept 1, 2026) hold approximately $2.117 trillion in wealth ($2.3 trillion as of Sept 22, 2026) and pay incredibly low taxes on their riches.

According to an analysis published by economists Gabriel Zucman and Emmanuel Saez, from 2019 to 2025, while California billionaires’ wealth grew an average of over 15 percent per year, they paid, on average, just 0.26 percent of their wealth annually in state income taxes. Sergey Brin and Larry Page paid just 0.07 percent of their wealth annually in California income tax during that period. I guess we can see why they don’t want anything to change.

This analysis prepared by the Institute for Policy Studies and Tax the Ultra-Rich Now (TURN). More detailed dossiers available soon. Press release HERE.