Data / Nonprofits / California / San Mateo / Mutual and membership benefit
Mutual and membership benefit nonprofits in San Mateo, CA: 4 registered with the IRS
4 mutual and membership benefit nonprofits are registered with the IRS in San Mateo, CA, 0 of them 501(c)(3) charities; the 3 that report revenue took in $2.8 million. The largest by revenue: City of San Mateo Retiree Funded Hra Trust ($1.4 million), San Mateo Consolidated Fire Department Funded Hra Trust ($882,232), Larkspur Landing 100 Corp ($500,807).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| City of San Mateo Retiree Funded Hra Trust | 501(c)(9) | 2017 | $1.4 million | $16.7 million | 2024-12 |
| San Mateo Consolidated Fire Department Funded Hra Trust | 501(c)(9) | 2021 | $882,232 | $4.1 million | 2024-12 |
| Larkspur Landing 100 Corp | 501(c)(2) | 2014 | $500,807 | $3.3 million | 2025-12 |
| 4022 Chino Hills Pkwy Inc | 501(c)(2) | 2013 | $0 | $0 | 2025-12 |
Other causes in San Mateo, CA
- Human services 76
- Education 59
- Philanthropy, voluntarism and grantmaking foundations 42
- Religion-related 39
- Recreation and sports 36
- Arts, culture and humanities 33
- Community improvement and capacity building 28
- Environment 12
- Youth development 10
- Health care 10
- Mental health and crisis intervention 10
- International, foreign affairs and national security 9
- Housing and shelter 8
- Animal-related 6
- Public and societal benefit 5
- Diseases, disorders and medical disciplines 5
- Medical research 5
- Civil rights, social action and advocacy 4
- Science and technology 4
- Crime and legal-related 4
- Food, agriculture and nutrition 4
- Employment 4
Every nonprofit in San Mateo, CA · Mutual and membership benefit nonprofits across the state · Nonprofits in every city of the state
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.