But before this cycle, Brin had been a sporadic donor, gone dark for many years. His last disclosed political donation in California was in 2010 — for $200,000 to join other Silicon Valley leaders in opposing an ultimately defeated ballot measure that would’ve suspended a state climate law.
Some of the billionaire donors — Slootman, Roblox CEO David Baszucki, Robinhood co-founders Baiju Bhatt and Vlad Tenev, Figma CEO Dylan Field, fintech executive Max Levchin and software founder Andrew Karam — have no history of spending on California politics before this year, according to state campaign records.
Tenev said in a statement that he donated to Building a Better California to support one of two other measures the group has advanced, which is designed to invalidate Prop 40 and would prohibit new taxes on various forms of personal savings.
“Special taxes on retirement and unrealized investment gains run contrary to the intent of the investment vehicles that have helped millions of Americans build wealth for the long term,” the Robinhood chief executive said. “History shows us that taxes aimed at a few have often been extended permanently to include more taxpayers over time.”
Another Building a Better California donor, Doerr, on the other hand, was a pioneer in shaping how Silicon Valley engaged with politics and Washington. He co-founded TechNet in 1997, which launched a political action committee as a key part of its strategy. Today, the influential industry trade association manages both federal and state-level PACs on top of a vast bipartisan lobbying network, with Google, Stripe and Kleiner Perkins among its many corporate members.
The wealth tax has also brought former Sequoia venture capitalists, Michael Moritz and Doug Leone, onto the same side after they previously diverged on California’s partisan redistricting fight at the ballot last year. They spent $7.5 million and $100,000, respectively, on groups fighting Prop 40.

