June 2026 Primary Election
Last Modified: February 12, 2026
The lists below reflect top contributors as reported by committees that have raised at least $1,000,000 and are primarily formed to support or oppose a state ballot measure or a candidate for state office in the June 2026 primary election.
Top Contributors List
Aggregate Contributions to Support or Oppose a Ballot Measure or Candidate
The following are the total amount donated by top contributors to each state ballot measure that is pending Secretary of State verification or are still circulating for signatures. These lists reflect contributions as reported by Primarily Formed Committees.
| Office | Candidate | Aggregated Contributions |
|---|---|---|
| Governor | Matt Mahan | Support: $12,520,853.46 |
| Total from top contributors | $12,520,853.46 | |
| Office | Candidate | Aggregated Contributions |
|---|---|---|
| Governor | Eric Swalwell | Support: $8,250,000 |
| Total from top contributors | $8,250,000 |
|
| Office | Candidate | Aggregated Contributions |
|---|---|---|
| Governor | Tom Steyer | Oppose: $6,025,000 |
| Total from top contributors | $6,025,000 | |
Ballot Measures - Pending or in Circulation for June 2026
None at this time.
Candidates - Primarily Formed to Make Independent Expenditures on Candidates
Supporting
California Back To Basics Supporting Matt Mahan For Governor 2026, 1487425
| Number | Contributor | State | Total Contributions |
|---|---|---|---|
| 1 | Michael Moritz | CA | $2,000,000 |
| 2 | Ashley Merrill | CA | $1,020,000 |
| 3 | Michael Seibel | CA | $1,000,000 |
| 4 | Neil Mehta | CA | $999,999 |
| 5 | Steven Huffman | CA | $999,999 |
| 6 | Patrick Collison | CA | $990,000 |
| 7 | William E. Oberndorf | CA | $843,200 |
| 8 | Chris Wanstrath | CA | $500,000 |
| 9 | Nina Wanstrath | CA | $500,000 |
| 10 | John A. Pritzker | CA | $500,000 |
| Total from top contributors | $9,353,198 | ||
Deliver for California - Matt Mahan for Governor 2026, 1488716
| Number | Contributor | State | Total Contributions |
|---|---|---|---|
| 1 | Sergey Brin | NV | $1,000,000 |
| 2 | Paul Buchheit | CA | $1,000,000 |
| 3 |
California Back to Basics Supporting Matt Mahan for Governor 2026 Top Donors to Contributor: Michael Moritz; Ashley Merrill |
CA | $282,655.46 |
| 4 | Brian Singerman | CA | $250,000 |
| 5 | Gary Filizetti | CA | $240,000 |
| 6 | Nicholas Pritzker | CA | $100,000 |
| 7 | Blake Byers | CA | $100,000 |
| 8 | Michelle Boyers | CA | $100,000 |
| 9 | Eugene Frantz | CA | $50,000 |
| 10 | Ted Schlein | CA | $45,000 |
| Total from top contributors | $3,167,655.46 | ||
Opposing
No committee opposing this candidate raised enough money to reach the reporting threshold for this list.
Supporting
Californians for a Fighter in Support of Eric Swalwell for Governor 2026 - 1488732
| Number | Contributor | State | Total Contributions |
|---|---|---|---|
| 1 | Stephen J. Cloobeck and affiliated entities | NV | $1,000,000 |
| 2 | EMS Professionals for a Healthier California, A Project of Global Medical Response, Inc. |
CA | $1,000,000 |
| 3 | California Medical Association Independent Expenditure Committee | CA | $1,000,000 |
| 4 | Driving California's Economy, Sponsored by CA New Car Dealers Association | CA | $250,000 |
| Total from top contributors | $3,250,000 | ||
| Number | Contributor | State | Total Contributions |
|---|---|---|---|
| 1 | Dignity CA Services Employees International Union SEIU Local 2015 | CA | $2,000,000 |
| 2 | SEIU California State Council for Working People | CA | $2,000,000 |
| 3 | Service Employees International Union Local 1000 Issues PAC | CA | $1,000,000 |
| Total from top contributors | $5,000,000 | ||
Opposing
No committee opposing this candidate raised enough money to reach the reporting threshold for this list.
Supporting
No committee supporting this candidate raised enough money to reach the reporting threshold for this list.
Opposing
| Number | Contributor | State | Total Contributions |
|---|---|---|---|
| 1 |
California Real Estate Independent Expenditure Committee - California Association of Realtors Top Donor to Contributor: California Real Estate PAC/Federal - California Association of Realtors |
CA | $5,000,000 |
| 2 | California Building Industry Association PAC | CA | $1,000,000 |
| 3 |
California Correctional Peace Officers Association PAC Top Donor to Contributor: California Correctional Peace Officers Association (intermediary for members under $100) |
CA | $25,000 |
| Total from top contributors | $6,025,000 | ||