Humboldt Area Foundation
Funding Overview
From IRS Form 990 filings · 2020–2026
Total received
$41.4M
Foundation funders
48
Grants recorded
200
Years covered
2020–2026
Who funds Humboldt Area Foundation?
Humboldt Area Foundation is funded by 48 grantmakers, led by The William & Flora Hewlett Foundation ($11.0M), Sergey Brin Family Foundation ($8.6M), The California Endowment ($5.7M). In total, IRS Form 990 filings record $41.4M in grants to Humboldt Area Foundation between 2020–2026.
Show all 48 funders
Funding over time
Grant dollars and counts received per year
From 2020 to 2026, annual grant giving ranged from $10K (2026) to $16.5M (2023). In 2026 it made 1 grant totaling $10K.
What grants has Humboldt Area Foundation received?
Individual grants from IRS Form 990 filings, newest first
| Year | Funder | Purpose | Amount |
|---|---|---|---|
| 2026 | Herman & Lenore Rottenberg Foundation | CHARITABLE | $10,000 |
| 2025 | Meyer Memorial Trust | FOR PROJECT SUPPORT | $250,000 |
| 2025 | The Reis Foundation Inc | Project Support | $135,000 |
| 2025 | Humboldt Health Foundation | GENERAL SUPPORT | $101,370 |
| 2025 | The San Francisco Foundation | FOR PROJECT SUPPORT | $20,000 |
| 2025 | Patricia D & William B Smullin | HOLIDAY PARTNERSHIP | $15,000 |
| 2025 | Patricia D & William B Smullin | AUNTIES ON THE RIVER NATIVE DOULA PROGRAM | $10,000 |
| 2025 | Patricia D & William B Smullin | SUMMER YOUTH PROGRAM | $10,000 |
| 2025 | Vesper Society | AUNTIES ON THE RIVER | $10,000 |
| 2025 | Herman & Lenore Rottenberg Foundation | CHARITABLE | $10,000 |
| 2025 | Patricia D & William B Smullin | TOOTH PROGRAM | $5,200 |
| 2025 | Patricia D & William B Smullin | SUMMER FOOD BOX PROGRAM | $5,000 |
| 2025 | Patricia D & William B Smullin | NATIVE AMERCICAN K-12 CURRICULUM LAUNCH | $5,000 |
| 2025 | Knapp George Owen Mem Fund Tua | GENERAL OPERATING | $2,000 |
| 2024 | CATALYST4 Inc | FOR THE PURPOSE OF ENVIRONMENTAL PROGRAMS | $2,555,060 |
| 2024 | Sergey Brin Family Foundation | GENERAL OPERATING SUPPORT | $2,457,212 |
| 2024 | John D and Catherine T Macarthur Foundation | IN SUPPORT OF THE KLAMATH RIVER FUND | $1,500,000 |
| 2024 | The California Endowment | PROMOTING CLIMATE AND COMMUNITY RESILIENCE VIA LEADERSHIP, HEALTH AND SAFETY: TO SUPPORT EFFORTS TO CREATE THE FIRST CARBON-NEGATIVE RURAL/TRIBAL REGION IN THE US BY 2030 THROUGH ACCELERATING CLIMATE RESILIENCE DEVELOPMENT WHILE CONFRONTING INEQUITABLE HEALTH AND SAFETY IMPACTS OF RAPID TRANSITIONS IN THE REDWOOD COAST, HUMBOLDT, TRINITY AND DEL NORTE REGION. | $1,000,000 |
| 2024 | Rockefeller Philanthropy Advisors Inc | CIVIL RIGHTS, SOCIAL ACTION & ADVOCACY | $425,000 |
| 2024 | The California Endowment | GENERAL OPERATING SUPPORT: TO SUPPORT AN ORGANIZATION DEDICATED TO CREATING A THRIVING, JUST, HEALTHY AND EQUITABLE REGION ACROSS DEL NORTE, HUMBOLDT, AND TRINITY COUNTIES. | $425,000 |
| 2024 | The William & Flora Hewlett Foundation | FOR THE REDWOOD REGION CLIMATE AND COMMUNITY RESILIENCE HUB AND TRIBAL CLIMATE RESILIENCE NETWORK | $250,000 |
| 2024 | Sequoia Park Zoo Foundation | To further the Zoo's mission | $230,162 |
| 2024 | RSF Social Finance Inc | GENERAL OPERATING SUPPORT | $200,000 |
| 2024 | The Reis Foundation Inc | Project Support | $115,000 |
| 2024 | Humboldt Health Foundation | GENERAL SUPPORT | $100,802 |
| 2024 | Christine & Jalmer Berg Foundation | CREATION OF ON-GROUINDS EDUCATION INTERPRETIVE STATION & WILDLIFE CAMERAS | $100,600 |
| 2024 | The Roundhouse Foundation | KLAMATH RIVER RESTORATION FUND (KRRF) | $100,000 |
| 2024 | S H Cowell Foundation | TO SUSTAIN THE TRIBAL NATIONS CLIMATE RESILIENCE NETWORK. | $100,000 |
| 2024 | Borealis Philanthropy | TO SUPPORT THE WORK OF HUMBOLDT AREA FOUNDATION | $100,000 |
| 2024 | The William & Flora Hewlett Foundation | FOR THE NATIVE CULTURES FUND | $65,000 |
Showing 30 most recent of 200 recorded grants.
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Frequently Asked Questions
Who funds Humboldt Area Foundation?
Humboldt Area Foundation is funded by 48 grantmakers, led by The William & Flora Hewlett Foundation ($11.0M), Sergey Brin Family Foundation ($8.6M), The California Endowment ($5.7M). In total, IRS Form 990 filings record $41.4M in grants to Humboldt Area Foundation between 2020–2026.
Who is Humboldt Area Foundation's largest funder?
The William & Flora Hewlett Foundation is the largest recorded funder of Humboldt Area Foundation, with $11.0M across 10 grants (2021–2024).
How much grant funding has Humboldt Area Foundation received?
IRS 990 filings record $41.4M in grants to Humboldt Area Foundation across 200 grants from 48 funders between 2020–2026. Filings are published on a delay, so recent grants may not appear yet.
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Grant data is drawn from IRS Form 990 filings via Grantable's GrantGraph™. Filings are published on a delay; recent grants may not appear yet.
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