In Support of this measure: 

 

Total amount of reported contributions to this measure: $33,413,577* 

Individual Ballot Measure Committees Formed for this Measure

Committee ID**

Committee Name

Total Reported Contributions

1495036

Tax the Ultra-Rich Now, Yes on 3 & 40, No on 41 & 42

$480,579

1484470

Yes on 40 - Billionaire Tax Now - No on 41 & 42, Sponsored by Service Employees International Union - United Healthcare Workers West

$32,932,998

*Through 10/22/2026. 

**The law also requires ballot measure committees that raise $1 million or more to report the Top 10 Contributors who have donated at least $10,000 to the committee.

 

In Opposition to this measure: 

 

Total amount of reported contributions to this measure: $130,344,804* 

Individual Ballot Measure Committees Formed for this Measure

Committee ID**

Committee Name

Total Reported Contributions

1485228

Californians Against Tax Increases, Sponsored by the California Business Roundtable - No on 40

$754,822

1486695

Golden State Promise - No on Prop 40

$10,450,000

1492108

No on Prop 40 - Doctors, Teachers, Small Businesses, Working Families and Public Safety Against the Reckless Wealth Tax Experiment

$118,739,982

1485007

Stop the Squeeze - No on Prop 40

$400,000

*Through 10/22/2026. 

**The law also requires ballot measure committees that raise $1 million or more to report the Top 10 Contributors who have donated at least $10,000 to the committee.