Data / Foundation grants / Arrillaga Foundation
Arrillaga Foundation: 53 grants to organizations, $9.5 million (tax year ended December 2024)
Arrillaga Foundation, a private foundation in Palo Alto, CA, paid 53 grants to organizations totaling $9,451,000 in its tax year ended December 2024, according to its Form 990-PF filed with the IRS on November 3, 2025. The largest was $3,500,000 to San Mateo County Sheriff's Office Foundation in Redwood City, CA for construction of the new san mateo county sheriff's office.
SpecStream is the live web data engine for teams and agents. It reads every private foundation's Form 990-PF as the IRS publishes it, and this page is that reading. Ask for the foundations that fund your cause in your state, with the amounts and purposes, and new grants arrive in your sheet, CRM, Slack or agent as the returns are filed.
- EIN
- 942460896
- Based in
- Palo Alto, CA
- Assets
- $50,859,228
- Grants paid
- $9,451,000
- Tax year ended
- December 2024
Grants paid, tax year ended December 2024
From the Form 990-PF filed November 3, 2025, IRS object ID 202503079349101720. It reported $9,451,000 in grants paid; 53 grants to organizations are listed.
| Recipient | Location | Purpose | Cause | Amount | Source |
|---|---|---|---|---|---|
| San Mateo County Sheriff's Office Foundation | Redwood City, CA | Construction of the new san mateo county sheriff's office | $3,500,000 | apps.irs.gov | |
| The Teak Fellowship | New York, NY | The marc e. becker endowment for leadership and professional development | Human services | $1,000,000 | apps.irs.gov |
| Brown University | Providence, RI | Paid student learning opportunities | $500,000 | apps.irs.gov | |
| Lucile Packard Foundation for Children's Health | Palo Alto, CA | Dr. jenny frankovich's pans infection research | $500,000 | apps.irs.gov | |
| Cambodian Children's Fund | Santa Monica, CA | Educational programming | $400,000 | apps.irs.gov | |
| President and Fellows of Harvard College | Boston, MA | Harvard t.h. chan school of public health - food allergy study & research | $350,000 | apps.irs.gov | |
| Caf America - McA Australia Mehretu Exhibition | Alexandria, VA | General support | $264,000 | apps.irs.gov | |
| The Ucla Foundation | Los Angeles, CA | The rape treatment center - general support | Education | $250,000 | apps.irs.gov |
| West Maui Improvement Foundation | Lahaina, HI | Olowalu firestation fundraiser | $250,000 | apps.irs.gov | |
| Ready To Succeed | Santa Monica, CA | Ready to succeed alumni and early career engagement program | $200,000 | apps.irs.gov | |
| Vision To Learn | Los Angeles, CA | General support | Health care | $200,000 | apps.irs.gov |
| Questbridge | Palo Alto, CA | Feasibility study program | $150,000 | apps.irs.gov | |
| Silicon Valley Social Venture Fund - SV2 | Redwood City, CA | General operating | $150,000 | apps.irs.gov | |
| Ballroom Marfa | Marfa, TX | General support | $100,000 | apps.irs.gov | |
| Downtown Women's Center | Los Angeles, CA | General support | $100,000 | apps.irs.gov | |
| Israel Tennis Centers Foundation Inc | New York, NY | General support | International, foreign affairs and national security | $100,000 | apps.irs.gov |
| Loyola Marymount University | Los Angeles, CA | Loyola project for the innocent program | Education | $100,000 | apps.irs.gov |
| Maccabi USA Inc | Philadelphia, PA | Financial aid endowment | Recreation and sports | $100,000 | apps.irs.gov |
| Storycorps | Brooklyn, NY | General support | Arts, culture and humanities | $100,000 | apps.irs.gov |
| The Teak Fellowship | New York, NY | Cats and swim programs | Human services | $100,000 | apps.irs.gov |
| Silicon Valley Social Venture Fund - SV2 | Redwood City, CA | General operating | $85,000 | apps.irs.gov | |
| Al Wooten Jr Youth Center | Los Angeles, CA | General support | Youth development | $50,000 | apps.irs.gov |
| Association To Benefit Children | New York, NY | General support | Human services | $50,000 | apps.irs.gov |
| Boston Children's Hospital | Boston, MA | Research for gut brain interaction | $50,000 | apps.irs.gov | |
| Cedars-Sinai Medical Center | Los Angeles, CA | Research in gut microbiome | Health care | $50,000 | apps.irs.gov |
| Gigi's Playhouse Nyc | New York, NY | General support | $50,000 | apps.irs.gov | |
| Harvard-Westlake School | Studio City, CA | Financial aid program | Education | $50,000 | apps.irs.gov |
| Hawai'i Foodbank | Honolulu, HI | Keiki school pantry program | $50,000 | apps.irs.gov | |
| Kapi'olani Health Foundation | Honolulu, HI | Abbie vara pediatric services fund | $50,000 | apps.irs.gov | |
| Pacific American Foundation | Kailua, HI | Nalu studies program | International, foreign affairs and national security | $50,000 | apps.irs.gov |
| The Peninsula Bridge Program | San Mateo, CA | General support | $50,000 | apps.irs.gov | |
| University of Washington Foundation | Seattle, WA | Uw medicine family planning fund | Education | $50,000 | apps.irs.gov |
| Ballroom Marfa | Marfa, TX | General support | $47,000 | apps.irs.gov | |
| Ronald McDonald House Charities of Hawaii | Honolulu, HI | General support | $35,000 | apps.irs.gov | |
| Cerebral Palsy Soccer Inc | Irvington, NY | General support | Recreation and sports | $25,000 | apps.irs.gov |
| Determined To Succeed | Santa Monica, CA | General support | Education | $25,000 | apps.irs.gov |
| Food Allergy Research & Education | McLean, VA | Food allergy research | Food, agriculture and nutrition | $25,000 | apps.irs.gov |
| Legal Outreach Inc | Long Island City, NY | General support | $25,000 | apps.irs.gov | |
| San Francisco General Hospital Foundation | San Francisco, CA | General operating | Health care | $25,000 | apps.irs.gov |
| The John Thomas Dye School | Los Angeles, CA | Financial assistance program | $25,000 | apps.irs.gov | |
| Brooklyn Debate League | Brooklyn, NY | General support | Education | $20,000 | apps.irs.gov |
| World Connect Inc | New York, NY | General support | International, foreign affairs and national security | $20,000 | apps.irs.gov |
| Accessurf Hawaii | Honolulu, HI | General support | Human services | $15,000 | apps.irs.gov |
| Achieve Tahoe | Truckee, CA | General support | $15,000 | apps.irs.gov | |
| Hawaii Performing Arts Company | Honolulu, HI | Mvt show sponsorship - parade | Arts, culture and humanities | $15,000 | apps.irs.gov |
| Kids & Art Foundation | Burlingame, CA | Lpch artist in residence program | Diseases, disorders and medical disciplines | $15,000 | apps.irs.gov |
| A'ali'i Mentoring | Honolulu, HI | General support | $10,000 | apps.irs.gov | |
| Caminar | San Mateo, CA | General support | Mental health and crisis intervention | $10,000 | apps.irs.gov |
| Christmas Bureau of Palo Alto | Palo Alto, CA | General support | $10,000 | apps.irs.gov | |
| Co-Cathedral of St Theresa Church of the Child Jesus | Honolulu, HI | Parish security fence project | $10,000 | apps.irs.gov | |
| Education Pioneers Inc | Boston, MA | General support | Education | $10,000 | apps.irs.gov |
| Palo Alto Weekly Holiday Fund (embarcadero Media Foundation) | Palo Alto, CA | General support | $10,000 | apps.irs.gov | |
| Uc Santa Barbara Foundation | Santa Barbara, CA | The ted deixler memorial fund | Education | $10,000 | apps.irs.gov |
Causes funded
From grants whose recipient has a cause.
| Cause | Granted |
|---|---|
| Human services | $1,165,000 |
| Education | $515,000 |
| Health care | $275,000 |
| International, foreign affairs and national security | $170,000 |
| Recreation and sports | $125,000 |
| Arts, culture and humanities | $115,000 |
| Youth development | $50,000 |
| Food, agriculture and nutrition | $25,000 |
States funded
| Recipient state | Granted |
|---|---|
| California | $5,980,000 |
| New York | $1,490,000 |
| Rhode Island | $500,000 |
| Hawaii | $485,000 |
| Massachusetts | $410,000 |
| Virginia | $289,000 |
| Texas | $147,000 |
| Pennsylvania | $100,000 |
Also on SpecStream
- Who funds human services in New York
- Who funds education in California
- Who funds health care in California
- Who funds international, foreign affairs and national security in New York
- Who funds recreation and sports in Pennsylvania
- Who funds arts, culture and humanities in New York
Updated November 3, 2025. Read from IRS Form 990-PF e-file data. Public domain (U.S. government work). Grants are as each foundation reported them to the IRS on its Form 990-PF. Grants to individuals are left out. A grant has a cause only where the recipient's name and city match one organization in the IRS Business Master File, and the cause is that organization's NTEE major group. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.