Spending on the California governor’s race is breaking records, and it’s not just Tom Steyer’s $213 million in contributions.
Former U.S. Secretary of Health and Human Services Xavier Becerra at a gubernatorial forum in Sacramento on April 14, 2026. This story is free to read because readers choose to support LAist.
If you find value in independent local reporting, Campaign donations are both a measure of popular support and a sign of which candidates special interests believe they can influence. CalMatters analyzed campaign finance data in the California governor’s race. Here are five takeaways on where the money is coming from and where it’s going. It’s a record-breaking election when it comes to spending by corporations and special interest groups trying to influence who becomes the next governor.
If you're enjoying this article, you'll love our daily newsletter, The LA Report. Each weekday, catch up on the 5 most pressing stories to start your morning in 3 minutes or less. Outside groups, which unlike candidates can receive unlimited donations, reported spending $79 million so far — more than double the amount spent through the November 2018 general election when Gavin Newsom won his first term.
Billionaire Tom Steyer is the biggest target: A political spending committee called California Is Not For Sale, funded by the state Realtors association, the California Chamber of Commerce, Pacific Gas & Electric and the state’s electrical workers’ union poured $32 million into ads opposing him.by challenging PG&E’s monopoly in much of Northern California. He’s also promised to pursue a ballot measure that would raise revenue for public services by requiring more accurate property tax assessments on business properties, a move that could upend the commercial real estate market.
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Some of the same groups spending against Steyer are running ads for Xavier Becerra. Those groups — along with organizations representing doctors, contractors and several labor unions — have spent $13 million through PACs to boost Becerra. Chevron, McDonald’s, dialysis giant DaVita and one of the state’s largest oil drillers, California Resources Corp., are funding one of the largest pro-Becerra groups, with each of them contributing $500,000.
Meta and AirBnB chipped in about $1 million each and health insurance corporation Centene, which runs California-based HealthNet, put in $100,000. Steyer is reveling in the spending against him, pointing to it as proof he’d stand up to utilities and big business. A climate activist, Steyer has highlighted Becerra’s support from Chevron. The progressive unions California Nurses Association and United Domestic Workers have spent a comparatively modest $1.4 million on mailers and digital media boosting Steyer.
Outside groups have also spent $1.8 million opposing Republican frontrunner Steve Hilton, a former Fox News host and British political strategist. California’s tech billionaires urged Mahan to run and backed him with millions in donations and two independent spending committees. They were enamored with his platform of government efficiency and opposition to new taxes — positions that would shield them from the Legislature’s push to regulate tech and raise taxes on the wealthy.
Donors included venture capitalists Michael Moritz and Brian Singerman, DoorDash CEO Tony Xu, Intuit founder Scott Cook, Google co-founder Sergey Brin and Los Angeles developer and former mayoral candidate Rick Caruso. The committees spent nearly $22 million on ads supporting Mahan, significantly more than the $9 million his campaign has spent. But the money wasn’t enough to overcome his significant disadvantage in name recognition as the first-term mayor of a city that doesn’t get much attention.
Strategists told the committees’ backers they needed at least $45 million to make a difference. One of the PACs, California Back to Basics, last week returned $1 million from Netflix CEO Reed Hastings; Hastings cryptically posted on X that he hadn’t asked for the money back.
The refund was an acknowledgement that the committee hadn’t succeeded in raking in a final $10 to $15 million the billionaire backers hoped to raise in the last weeks of the campaign, committee spokesperson Matt Rodriguez said. Yet despite his opponents’ deep-pocketed donors, no one has matched the $213 million Steyer has spent on his own campaign, allowing him to blanket the airwaves with ads, That makes his the most expensive primary campaign in California gubernatorial history, exceeding that of former eBay executive Meg Whitman, a Republican who spent about $94 million in the June 2010 primary — about $142 million in today’s dollars — spending tens of millions more before losing to Jerry Brown in the general election.
California gubernatorial candidates during a debate hosted by CBS Bay Area and the San Francisco Examiner in San Francisco on May 14, 2026. DaVita, the California Medical Association and the California Professional Firefighters Association all supported former Rep. Eric Swalwell’s gubernatorial bid before he dropped out over sexual assault allegations. Small donors made a similar leap.
The CalMatters analysis found that after Swalwell dropped out, more than 500 of his campaign donors went on to contribute to Becerra’s campaign. No other candidate received that much support from former Swalwell donors. Swalwell, who has also since resigned from Congress, continues to use his gubernatorial campaign to pay more than $313,000 to attorney Sara Azari, who is defending him against the allegations. He has also refunded about $250,000 to nearly 50 donors.
The Republican frontrunner amassed the highest number of campaign donors in the race: more than 20,000. Nearly a quarter of them live outside California. , build housing on undeveloped suburban land and cut income taxes for the middle class. He received a slight uptick in donations after President Donald Trump endorsed him on April 6.
Katie Porter, the Democratic former congressmember from Orange County and consumer protection attorney, had the second-highest number of donors, with more than 15,000. She also has the highest share of donors outside California, reflecting her relative national fame from her headline-grabbing time grilling corporate CEOs in Congress. , who touts her reliance on grassroots donors and refusal to take corporate contributions. From April 18 through May 19 she brought in less money than Mahan.
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