The organized healthcare industry was one of the biggest forces in this race, and most of its money lined up behind Eric Swalwell before he withdrew, which left a large pool of healthcare money stranded mid-primary. The figures below come from cagovtracker, which reads them from CAL-ACCESS.

Two different pools of corporate money are moving this race. One is the business-and-utility coalition spending against Tom Steyer, whose platform threatens its members directly. The other is a tech-and-real-estate network spending for Matt Mahan, who is polling near the back of the field while drawing one of the largest pro-candidate outside-money efforts in the race.

• JOBSPAC, sponsored by the California Chamber of Commerce: put about $7.75 million into the committee opposing Steyer. CalChamber is the statewide business lobby.
• Uber Innovation PAC: $4 million into the pro-Swalwell IE committee, given before Swalwell withdrew.
• Airbnb: about $1.8 million in 2026 outside-committee giving, plus $1 million through a committee it sponsors, the Committee to Expand the Middle Class.
• AT&T: about $1.3 million in 2026 outside-committee giving.
• The pro-Mahan tech network: California Back to Basics has spent about $35 million for Matt Mahan and Deliver for California about $5.6 million more, funded by names including Michael Moritz (Sequoia Capital), Rick Caruso, and Michael Seibel (former Y Combinator CEO). The Govern for California Action Committee, a tech-and-finance donor network, put $3 million into California Back to Basics.

One thing worth naming plainly: Tom Steyer is himself a billionaire, and that deserves real scrutiny, but his platform proposes commercial Prop 13 reform and a public-power utility breakup, which threaten corporate concentration, and the billionaire-class money in this race is largely organized against him rather than behind him.

Not every kind of backing shows up as a dollar figure. These endorsements move voters and signal where a bloc of the electorate is headed.

• Donald Trump endorsed Steve Hilton on April 6, 2026, on Truth Social.
• The California Republican Party did not endorse a candidate for governor. At its April convention the vote split, with Chad Bianco at 49 percent and Steve Hilton at 44 percent, and neither reached the 60 percent the party requires to endorse.
• Willie Brown, the former San Francisco mayor, endorsed Tom Steyer.
• Sam Liccardo, the congressman and former San Jose mayor who preceded Mahan as mayor, endorsed Matt Mahan.
• Karen Bass, the mayor of Los Angeles, and Barbara Boxer, the former U.S. senator, endorsed Antonio Villaraigosa.
• Senator Elizabeth Warren endorsed Katie Porter.
• Equality California, California Young Democrats, and the Planned Parenthood Orange and San Bernardino voter guide list Xavier Becerra.
• Courage California, Our Revolution, and the Sierra Club endorsed Tom Steyer, and YIMBY Action, a pro-housing-development group, endorsed Steyer in early May.
• California Environmental Voters reached no consensus in the governor's race.

The LA mayor's race is nonpartisan: if no candidate exceeds 50 percent on June 2, the top two advance to a November runoff. Four candidates have emerged as frontrunners by fundraising. The figures below are money raised between January 1 and April 2026, as reported to the LA City Ethics Commission.

• Spencer Pratt: approximately $540,000 raised, the leading total among the challengers.
• Nithya Raman: approximately $530,000 raised.
• Karen Bass (incumbent): approximately $495,000 raised in this period, on top of a war chest of about $2.3 million in cash on hand from earlier fundraising. cagovtracker puts her total raised since 2024 at about $2.8 million.
• Rae Chen Huang: approximately $165,000 raised, an entirely grassroots total with no large donors.

Bass's 2026 fundraising pace trails her challengers, but she holds the largest war chest from earlier cycles. One self-funding candidate, Adam Miller, has put about $2.5 million of his own money into his campaign; cagovtracker excludes him from the frontrunner comparison because he is polling low.

Source: cagovtracker.com LA Mayor tracker, citing the LA City Ethics Commission and The Wrap, data current as of May 2026. For independent-expenditure activity in this race, see the independent expenditures page.

State Senate District 26 covers Boyle Heights, Highland Park, Koreatown, the Eastside and Vernon. The seat is open because Senator Maria Elena Durazo is running for the LA County Board of Supervisors. It is an all-Democratic race, and the California Democratic Party did not endorse. Two candidates have reported the largest fundraising totals:

• Sara Hernandez: approximately $346,000 raised.
• Wendy Carrillo: approximately $183,000 raised.

Other candidates in the field, including Sarah Rascon, Maebe Pudlo and Juan Camacho, do not have a sourced fundraising figure in our exports, so none is reported here.

Source: cagovtracker.com Legislature tracker, citing CAL-ACCESS, data current as of May 2026.

Proposition 50 redistricting made several Southern California House seats competitive. One frontline incumbent has a documented fundraising total:

• CD-27, George Whitesides (incumbent): more than $2.8 million raised for the 2026 cycle, with more than $2 million in cash on hand as of the Q3 2025 filing, one of the top Democratic frontline fundraising totals nationally. The district has a Cook Partisan Voter Index of D+3.

The other top-tier competitive House races, CD-45 (Derek Tran) and CD-47 (Dave Min), are widely expected to draw heavy party and outside spending, but our sources do not yet carry committee-level or candidate-level dollar figures for them, so none is reported here. Federal congressional fundraising is reported to the Federal Election Commission rather than to CAL-ACCESS.

Source: cagovtracker.com Congress tracker, citing CAL-ACCESS and FEC-derived figures, data current as of May 2026.

cagovtracker counts 20 active independent-expenditure committees in this race, about $64.8 million spent in support of candidates and about $58.0 million spent against them. These are the committees doing most of that spending.

• California Is Not for Sale (No on Steyer): about $58.1 million opposing Tom Steyer, by far the largest pool of outside money in the race. Per Capitol Weekly reporting on the May 7 CAL-ACCESS filings, the named direct funders of California Is Not for Sale are the California Association of Realtors (about $5 million), PG&E (about $9 million flowing in via this committee and CRAE combined, the PG&E-backed Californians for Resilient and Affordable Energy shell; the Steyer campaign has filed an FPPC complaint alleging illegal concealment), and the California Building Industry Association (about $1 million), plus a small $25,000 contribution. The aggregate $58.1 million also reflects spending by linked anti-Steyer vehicles, including CRAE itself and JOBSPAC (sponsored by the California Chamber of Commerce); the per-committee dollar split is being re-verified against the latest CAL-ACCESS filings.
• California Back to Basics: about $35.3 million for Matt Mahan, funded by tech and real-estate money.
• Californians for a Fighter (Eric Swalwell): about $19.3 million that was raised for Eric Swalwell, who has since withdrawn from the race. Funded heavily by healthcare-industry money and Uber.
• Deliver for California: about $5.6 million more for Matt Mahan.
• Greater Golden State: about $1.1 million opposing Steve Hilton.
• Straight From the Heart of California: about $711,000 for Antonio Villaraigosa.

This page is descriptive, and it leans on cagovtracker.com for the money, because cagovtracker reads its numbers nightly from CAL-ACCESS, the official California campaign-finance system. For the committee-level documentation, with the CAL-ACCESS filer IDs and the dollar-level breakdowns, the independent expenditures page has the full primary-source citations. If something here looks wrong to you, the corrections form goes straight to our team.