Top California Donors Spent Billions on Politics

A new report found that 99 major entities outspent the bottom 99.9% of residents on political activity in California.

Updated on Oct. 1, 2026 in Philanthropy

Isometric editorial illustration of a heavy red steel block pressing down on a delicate golden wire structure, representing economic influence. — A Wisevoter report reveals that 99 major donors in California contributed $5.8 billion to political campaigns and lobbying over two decades, exerting influence that eclipses the contributions of the rest of the state. AI Illustration. Upload story photo >

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Researchers analyzed two decades of political activity and found the state's top 99 donors contributed $5.8 billion to campaigns and lobbying. This spending has fueled efforts to oppose tax measures and influence election outcomes across California.

Why it matters

The report highlights a significant concentration of political influence, as these major donors often invest in agendas that aim to defeat regulations and shape state policy. This level of funding frequently surpasses the collective political contributions of nearly the entire state population.

The California Oligarch Index tracked $5.8 billion in spending, including $260 million from Chevron and $256 million from DaVita. The California Association of Realtors and Philip Morris/Altria also contributed $254 million and $237 million, respectively.

The players

Chevron

This multinational energy corporation is a significant contributor to political campaigns and lobbying efforts in California.

DaVita

A major healthcare company that has directed millions of dollars toward state political contributions.

California Association of Realtors

This trade association represents real estate professionals and is one of the state's largest political spenders.

Philip Morris/Altria

A leading tobacco and consumer products firm that maintains an active lobbying and campaign financing presence.

California Correctional Peace Officers Association

This labor union represents prison guards and is a prominent financial player in California state politics.

The details

Donors utilize a mix of direct contributions to political action committees and lobbying efforts, with additional dark money funneled through non-disclosing nonprofits. These organizations frequently oppose specific regulations and tax measures, including current efforts to defeat Proposition 40.

The California Oligarch Index tracks spending data from 2005 to 2024.
Voters will cast ballots on Proposition 40, the Billionaire Tax, in November 2026.

Market Landscape

This concentration of political capital mirrors the broader national trend where the wealthiest 1% of Americans control 51% of corporate equities. It highlights how major donors consolidate influence to shape a state policy landscape that aligns with their financial interests.

The immense political spending by these 99 entities often leads to the defeat of tax measures that could impact the average resident's cost of living. Consumers may see fewer regulatory protections in areas like healthcare and housing as these donors shape state policy.

The takeaway

The analysis reveals that a tiny fraction of wealthy donors wields outsized influence over the state's legislative and electoral processes. Residents should be aware that corporate lobbying expenditures are a significant, often invisible, factor in the success or failure of public ballot initiatives.