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Arrillaga Foundation at a glance

· Private foundation

Arrillaga Foundation

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$9.5M
Granted FY2024still arriving
53
Grants FY2024still arriving
9
States reached
$3.5M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0199% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Education$25MPublic Safety & Disaster$11MCrime & Legal$3.5MHealth$2.1MReligion$1.0MArts & Culture$702kInternational$550kCommunity Improvement$420kOther$0
02FY2024 · 53 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • $10k–50k21 grants · $402k
  • $50k–250k23 grants · $2.0M
  • $250k+9 grants · $7.0M
$50,000
Median grant
9
States reached
$51M
Total assets
Largest grants
RecipientAmount
SAN MATEO COUNTY SHERIFF'S OFFICE FOUNDATION$3,500,000
THE TEAK FELLOWSHIP$1,000,000
BROWN UNIVERSITY$500,000
LUCILE PACKARD FOUNDATION FOR CHILDREN'S HEALTH$500,000
CAMBODIAN CHILDREN'S FUND$400,000
PRESIDENT AND FELLOWS OF HARVARD COLLEGE$350,000
CAF AMERICA - MCA AUSTRALIA MEHRETU EXHIBITION$264,000
WEST MAUI IMPROVEMENT FOUNDATION$250,000
THE UCLA FOUNDATION$250,000
READY TO SUCCEED$200,000
VISION TO LEARN$200,000
SILICON VALLEY SOCIAL VENTURE FUND - SV2$150,000
QUESTBRIDGE$150,000
ISRAEL TENNIS CENTERS FOUNDATION INC$100,000
MACCABI USA INC$100,000
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its human-services grants (FY18–24, $5.0M) land where the poverty rate runs at 10%, against an area that typically sits at 10%. 27% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 10%CANINE COMPANIONS FOR INDEPENDENCE: $10k → 9%DOWNTOWN WOMEN'S CENTER: $100k → 14%ASCRS FOUNDATION: $10k → 6%SAN MATEO COUNTY SHERIFF'S OFFICE FOUNDATION: $3.5M → 7%ASSOCIATION TO BENEFIT CHILDREN: $50k → 17%THE TEAK FELLOWSHIP: $1.0M → 17%THE TEAK FELLOWSHIP: $100k → 17%THE TEAK FELLOWSHIP: $50k → 17%THE TEAK FELLOWSHIP: $25k → 17%PALO ALTO COMMUNITY CHILD CARE: $10k → 8%SUNNYVALE COMMUNITY SERVICES: $100k → 8%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

WA
NY
MA
PA
RI
CA
VA
HI
TX
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
04

Where the work is directed

The same grants placed two ways: where each recipient sits, and where its stated purpose sends the money.

About 10% of Arrillaga Foundation’s grant dollars are earmarked for a different county than the recipient’s own address.

Arrillaga Foundationlessmore of its giving
Placed by recipient address
How this is measured
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the funder’s own 990 grant descriptions.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

40%of every dollar goes to organizations it has funded before.
$16M · 12 repeat orgs$24M to everyone else

Grantees it renews have grown median revenue +46% since the first grant, against +40% for those funded once.

12 repeat relationships: 4 still active in FY2024, 8 since wound down; 43 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

12
22

Total granted

$16M
$17M

Median revenue growth · since first grant

+46%
+40%

Still filing today

92%
77%

New vs renewed · share of each year

In FY2024, 19% of grant dollars renewed an existing relationship; $6.7M went to new ones.

50%100%’17’18’19’20’21’22’23’24
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’17’18’19’20’21’22’23’24
EducationHealthHuman ServicesArts & CultureInternationalFood & NutritionOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). The earliest year is left-censored: relationships that predate the data read as new. Theme is the grantee’s IRS cause.

Backed again, and grew

  • MC
    MENLO COLLEGE
    4× · 2020–2023 · $13M · revenue +17%
  • TT
    THE TEAK FELLOWSHIP INC
    3× · 2018–2024 · $1.2M · revenue +85%
  • GE
    GREEN ENVELOPE FUND
    5× · 2019–2024 · $50k · revenue +56%

Funded once

  • WF
    WOODSIDE FIRE FOUNDATION
    one grant, 2022 · $10M
  • 'S
    'IOLANI SCHOOL
    one grant, 2023 · $5.0M · revenue +12%
  • TD
    The Daniel R Sayre Memorial Foundation
    one grant, 2023 · $1.0M · revenue -92%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
The Uc Davis Foundation

The mission of the uc davis foundation is to secure, steward and manage private gifts for uc davis.

Education
2
University of California Irvine Foundation

The mission of the university of california, irvine foundation (uc irvine foundation) is to raise and manage private funds to support uc irvine's broader mission of excellence in teaching, research and public service. to this end, the uc…

Education
3
President-Board of Trustees Santa Clara College

Scu is a catholic and jesuit institution that makes student learning its central focus, promotes faculty and staff learning in its various forms, and exhibits organizational learning.

Education
4
The International School of San Francisco

Guided by the principles of academic rigor and diversity, the international school of san francisco offers programs of study in french and english to prepare its graduates for a world in which the ability to think critically and to…

Education
5
Pacific University

A diverse and sustainable learning community dedicated to discovery and excellence in teaching, scholarship and practice, pacific university inspires students to think, care, create and pursue justice in our world.

Education
6
University of the Pacific

To provide a superior, student-centered learning experience integrating liberal arts and professional education and preparing individuals for lasting achievement and responsible leadership in their careers and communities.

Education
7
Silicon Schools Fund Inc

The mission of the silicon schools fund is to improve education through supporting the launch of excellent new schools, improving academic instruction in existing schools, and by funding some of the boldest innovations in education…

Education
8
Ucsf Foundation Investment Company

The organization provides professional investment management services for endowed gifts and financial assets entrusted to the ucsf foundation.

Education
9
California College of the Arts

California college of the arts educates students to shape culture and society through the practice and critical study of art, architecture, design, and writing. benefitting from its san francisco bay area location, the college prepares…

Education
10
University of Southern California

The central mission of the university of southern california is the development of human beings and society as a whole through the cultivation and enrichment of the human mind and spirit. the principal means by which our mission is…

Education
11
Scholarship Foundation of Santa Barbara

The scholarship foundation of santa barbara inspires, encourages and supports santa barbara county students to and through college, graduate and vocational school by providing information, advising, and scholarships.

—
12
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
How this is measured
The grantee most central to the portfolio’s shape is Uc Santa Barbara Foundation; the most unlike its peers is Rich May Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
05the grantee network

71 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 71 of the 82 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

1
Load-bearing (≥25% of a budget)
8
Early backer (in before they grew)
71/71
Grantees still filing
44/71
Grew since first funded

Where the money sits, by cause and then by grantee

MENLO COLLEGE: $13,498,574 · OtherMENLO COLLEGEWOODSIDE FIRE FOUNDATION: $10,000,000 · OtherWOODSIDE FIRE FOUNDATIONCHABAD OF GREATER SOUTH BAY: $1,000,000 · Other+40 more: $2,138,000 · Other+40 more'IOLANI SCHOOL: $5,000,000 · Education'IOLANI SCHOOLTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $1,961,200 · EducationTHE BOARD OF TRUSTEE…President and Fellows of Harvard College: $350,000 · Education+12 more: $771,000 · Education+12 moreSAN MATEO COUNTY SHERIFF'S OFFICE FOUNDATION: $3,500,000 · Human ServicesSAN MATEO CO…THE TEAK FELLOWSHIP INC: $1,175,000 · Human ServicesTHE TEAK FEL…+7 more: $295,000 · Human Services+7 moreBROWN UNIVERSITY: $2,500,000 · Community ImprovementLUCILE PACKARD FOUNDATION FOR CHILDREN'S HEALTH: $1,500,000 · HealthVISION TO LEARN: $200,000 · Health+8 more: $211,000 · HealthThe Daniel R Sayre Memorial Foundation: $1,000,000 · Public Safety & DisasterCambodian Childrens Fund: $400,000 · PhilanthropySILICON VALLEY SOCIAL VENTURE FUND - SV2: $235,000 · Philanthropy+1 more: $20,000 · Philanthropy
Other$26,636,574Education$8,082,200Human Services$4,970,000Community Improvement$2,500,000Health$1,911,000Public Safety & Disaster$1,000,000Philanthropy$655,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetMENLO COLLEGE: $13,498,574 over 4y, 17% of budget'IOLANI SCHOOL: $5,000,000 over 1y, 5.0% of budgetSAN MATEO COUNTY SHERIFF'S OFFICE FOUNDATION: $3,500,000 over 1y, 100% of budgetBROWN UNIVERSITY: $2,500,000 over 2y, 0.1% of budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $1,961,200 over 2y, 0.0% of budgetLUCILE PACKARD FOUNDATION FOR CHILDREN'S HEALTH: $1,500,000 over 2y, 0.8% of budgetTHE TEAK FELLOWSHIP INC: $1,175,000 over 3y, 11% of budgetThe Daniel R Sayre Memorial Foundation: $1,000,000 over 1y, 5.6% of budgetCambodian Childrens Fund: $400,000 over 1y, 3.6% of budgetPresident and Fellows of Harvard College: $350,000 over 1y, 0.0% of budgetUCLA FOUNDATION: $250,000 over 1y, 0.0% of budgetSILICON VALLEY SOCIAL VENTURE FUND - SV2: $235,000 over 1y, 10% of budgetREADY TO SUCCEED: $200,000 over 1y, 4.6% of budgetVISION TO LEARN: $200,000 over 1y, 0.9% of budgetMACCABI USA INC: $100,000 over 1y, 2.4% of budgetISRAEL TENNIS CENTERS FOUNDATION INC: $100,000 over 1y, 1.2% of budgetSUNNYVALE COMMUNITY SERVICES: $100,000 over 1y, 0.5% of budgetDOWNTOWN WOMEN'S CENTER: $100,000 over 1y, 0.3% of budgetLOYOLA MARYMOUNT UNIVERSITY: $100,000 over 1y, 0.0% of budgetSTORYCORPS INC: $100,000 over 1y, 0.7% of budgetHAWAII FOODBANK INC: $50,000 over 1y, 0.1% of budgetUNIVERSITY OF WASHINGTON FOUNDATION: $50,000 over 1y, 0.0% of budgetGREEN ENVELOPE FUND: $50,000 over 5y, 6.8% of budgetKapi'olani Health Foundation: $50,000 over 1y, 0.4% of budgetSAN FRANCISCO BALLET ASSOCIATION: $50,000 over 2y, 0.1% of budgetHARVARD-WESTLAKE SCHOOL: $50,000 over 1y, 0.0% of budgetAL WOOTEN JR YOUTH CENTER: $50,000 over 1y, 4.5% of budgetASSOCIATION TO BENEFIT CHILDREN: $50,000 over 1y, 0.2% of budgetCEDARS-SINAI MEDICAL CENTER: $50,000 over 1y, 0.0% of budgetPACIFIC AMERICAN FOUNDATION: $50,000 over 1y, 1.3% of budgetTHE PENINSULA BRIDGE PROGRAM: $50,000 over 1y, 0.9% of budgetRONALD MCDONALD HOUSE CHARITIES OF HAWAII INC: $35,000 over 1y, 1.1% of budgetCHP 11-99 FOUNDATION: $35,000 over 2y, 0.2% of budgetVista Center for the Blind and Visually Impaired: $30,000 over 3y, 0.6% of budgetJasper Ridge Farm: $30,000 over 3y, 2.4% of budgetPUNAHOU SCHOOL: $30,000 over 1y, 0.0% of budgetEMBARCADERO MEDIA FOUNDATION: $30,000 over 3y, 1.6% of budgetOur Brothers Home: $30,000 over 3y, 9.2% of budgetSAN FRANCISCO GENERAL HOSPITAL FOUNDATION: $25,000 over 1y, 0.1% of budgetLEGAL OUTREACH INC: $25,000 over 1y, 0.9% of budgetTHE JOHN THOMAS DYE SCHOOL: $25,000 over 1y, 0.1% of budgetDetermined to Succeed: $25,000 over 1y, 3.1% of budgetA TAVOLA TOGETHER FOUNDATION: $25,000 over 1y, 6.6% of budgetSILICON VALLEY CREATES: $25,000 over 1y, 0.8% of budgetCEREBRAL PALSY SOCCER INC: $25,000 over 1y, 9.7% of budgetFOOD ALLERGY RESEARCH & EDUCATION INC: $25,000 over 1y, 0.1% of budgetBROOKLYN DEBATE LEAGUE INC: $20,000 over 1y, 8.0% of budgetSilicon Valley Community Foundation: $20,000 over 2y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Silicon Valley Commun…Jewish Community Fede…The David and Lucile …The Palo Alto Communi…Los Altos Mountain Vi…Atherton Family Found…Gs Donor Advised Phil…Bright Funds Foundati…McInerny Foundation--Morgan Stanley Global…Tosa FoundationFirst Insurance Compa…
Silicon Valley Community FoundationCA23.7× affinity17 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Silicon Valley Community Foundation · Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma · The David and Lucile Packard Foundation · The Palo Alto Community Fund · Los Altos Mountain View Community Foundation · Atherton Family Foundation · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Bright Funds Foundation · McInerny Foundation-- · Morgan Stanley Global Impact Funding Trust Inc · Tosa Foundation · First Insurance Company of Hawaii Charitable Foundation

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Arrillaga Foundation funds: left to right is the share of its income from government, bottom to top the share from Arrillaga Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%6%25%56%100%funder's share of their income ↑0%19%38%56%75%share of the org’s income from government →median 7%
  • President and Fellows of Harvard College: 7% of income from government
no gov moneyreceives it· size = income
1get no government money at all
21report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–75%
typical government reliance, FY20–25
How this is measured
Government income is each org’s traced federal awards (USASpending grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that a grant caused the public funding. Coverage is precision-first, a floor rather than a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12 to 24 months.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Arrillaga Foundation?

Find your warmest path to Arrillaga Foundation through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 82 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Arrillaga’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home