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California · Private foundation

Wendell Family Foundation

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$903k
Granted FY2025(still arriving)
51
Grants FY2025
40
Organizations funded FY2024
23%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$4,000
Largest grant, FY2025
$260,000
Organizations funded a year
40 to 99
FY2018 to FY2024
States reached, FY2025
15
Total assets, FY2025
$2.9M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 23% of the organizations Wendell Family Foundation funded were first-time grantees, receiving 4% of its grant dollars.

New vs renewed · share of each year

In FY2024, 96% of grant dollars renewed an existing relationship; $32k went to new ones.

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

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

’18’19’20’21’22’23’24
HealthEducationHuman ServicesEnvironmentArts & CultureInternationalOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving51$903k27%
FY202440$887k23%
FY202356$722k36%
FY202264$794k38%
FY202175$658k28%
FY202082$599k29%
FY201999$415k40%
FY201893$337k51%
98% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Education$2.0MRecreation & Sports$1.7MSocial Science$405kFood & Nutrition$357kReligion$320kHealth$270kScience & Tech$190kArts & Culture$75kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

ME
VT
NH
WA
ND
MN
MI
NY
MA
OR
NV
IN
PA
NJ
CT
RI
CA
CO
VA
MD
AZ
TN
DC
OK
AL
GA
TX
FL

Top grantees

Largest recipients by total granted, FY2017 to FY2025, and the share of each one’s budget the grants supplied at peak.

GranteeTotal grantedYearsShare of their budget
Golden Gate National Parks Conservancy$1,646,70091%
The Trustees of Princeton University$1,011,61790%
Chronicle Season of Sharing Fund$345,00090%
Johns Hopkins University$200,00030%
The Exploratorium$163,00090%
Cottage 1886 Foundation Inc$118,000338%
The Hamlin School$109,00070%
University of California San Francisco Foundation$103,75040%
Protestant Episcopal Church in the Diocese of California$54,1009n/a
Grassroot Soccer Inc$53,00090%
Show all 177 grantees
All grantees of Wendell Family Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Golden Gate National Parks Conservancy$1,646,70091%
The Trustees of Princeton University$1,011,61790%
Chronicle Season of Sharing Fund$345,00090%
Johns Hopkins University$200,00030%
The Exploratorium$163,00090%
Cottage 1886 Foundation Inc$118,000338%
The Hamlin School$109,00070%
University of California San Francisco Foundation$103,75040%
Protestant Episcopal Church in the Diocese of California$54,1009n/a
Grassroot Soccer Inc$53,00090%
Fishers Island Conservancy Inc$50,000112%
Pratham USA$40,00030%
Palo Alto Players Peninsula Center Stage$31,00062%
The American India Foundation$30,50070%
Children's Day School Inc$30,00010%
Town School for Boys$29,40060%
San Francisco Education Fund$28,54570%
Foundation for Student Communicationinc$27,50091%
Princeton-Blairstown Center Inc$25,50090%
Isles Inc$25,50040%
Harvard Business School Mba Class of 1976 Inc$25,0001n/a
University High School$24,10090%
UTEC Inc$22,00090%
San Francisco University High School$21,20060%
Redwood Credit Union Community Fund Inc$20,00010%
Edwell Inc$20,00021%
Pan-Massachusetts Challenge Inc$17,18590%
Princeton in Africa Inc$16,00061%
San Francisco Ballet Association$15,00020%
Sjogren's Foundation Inc$12,50040%
Marin Country Day School$10,00010%
Suny New Paltz Foundation Inc$10,00020%
Demarest Swim Club$10,0001n/a
Kipp Bay Area Schools$10,00010%
Pennsylvania Hospital of the University of Pennsylvania Health System$10,00010%
Foundation for Excellence Inc$9,75020%
Protestant Episcopal Diocese of Massachusetts$9,2505n/a
Lewis W Butler Foundation$9,00042%
The Center for Reproductive Rights Inc$8,08150%
Safe & Sound$8,00030%
Ten Strands$8,00070%
American Institute of Chemical Engineers$7,00030%
Teach for America Inc$7,00030%
Mission Dolores Academy$6,0002n/a
US Lacrosse Inc$5,50050%
Coaching Corps$5,50050%
Aim High$5,50070%
Friends of St Stephen's Youth Programs Inc$5,25050%
Peer Health Exchange Inc$5,08430%
University of Oklahoma Foundation Inc$5,0001n/a
Occidental College$5,00010%
First Baptist Church$5,0001n/a
The Bridge of Books Foundation Inc$5,000110%
The Houston Food Bank$5,00010%
Meta Inc$5,0001n/a
Healthright 360$5,00010%
Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation$5,00050%
The Reporters Committee for Freedom of the Press$5,0001n/a
Jewish Community Center of San Francisco$5,00040%
Foundation for Puerto Rico Inc$5,00010%
Sanctuary for Families Inc$5,00010%
Rosie's Place Inc$4,95070%
Positive Coaching Alliance$4,50040%
Harvard Magazine Inc$4,50080%
One Purpose School Inc$4,50040%
American National Red Cross & Its Constituent Chapters and Branches$4,17520%
California Pacific Medical Center Foundation$4,00030%
California Academy of Sciences$4,00030%
St Anthonys$3,5003n/a
Equal Justice Initiative$3,00020%
Literacy Volunteers of Washington County$3,00021%
Educare DC$3,00060%
Boys & Girls Clubs of San Francisco$3,00030%
Caminar$3,00030%
Literacy Volunteers of Washington County$3,0003n/a
The Fountain Fund$2,70020%
Kqed Inc$2,70050%
The Facial Pain Association Inc$2,70040%
The Michael J Fox Foundation for Parkinson's Research$2,53020%
Oakland Lacrosse Club$2,51530%
Sonoma County Vintners Foundation$2,5001n/a
Talk Tech Association$2,50011%
Let's Share the Sun Foundation$2,50010%
Grace Church in Haddonfield$2,5001n/a
Small Point Summer School Inc$2,50011%
Everytown for Gun Safety Support Fund Inc$2,50010%
Shadhika Project$2,50011%
Pancreatic Cancer Action Network Inc$2,25040%
Sls Preschool$2,00020%
Alzheimer's Disease Research Foundation$2,00040%
Tipping Point Community$2,00010%
Scheuerman Youth Fund$2,0002n/a
Holy Cross Monastery$2,0002n/a
San Francisco Boys Chorus$1,75050%
Wikimedia Foundation Inc$1,70040%
Good Samaritan Family Resource Center of San Francisco$1,50030%
Best Buddies International Inc$1,50050%
New York Women's Foundation Inc$1,50020%
Silicon Valley International School$1,50010%
Yosemite Foundation$1,40040%
Outward Bound California$1,25040%
American Cancer Society Inc$1,21260%
Selamta Family Project$1,03210%
World Wildlife Fund Inc$1,00010%
The Carter Center Inc$1,00010%
The Shakespeare Theatre$1,00020%
TASK Inc Trenton Area Soup Kitchen Inc$1,00010%
Junior Achievement of New Jersey$1,00010%
Trustees of Phillips Academy$1,00010%
San Francisco Beautiful$1,00011%
Artlife Productions Inc$1,00010%
Compass Family Services$1,00020%
Blood Cancer United Inc$1,00010%
Redwood Empire Food Bank$1,00010%
The Discovery Land Company Foundation$1,00010%
Ac Rugby Foundation$1,00012%
Eye to Eye Inc Dba the Neurodiversity Alliance$1,00010%
The Clear Fund$1,00010%
Coastal Repertory Theatre Inc$1,00010%
Npower Inc$1,00010%
Tiger Capital Management Np Inc$1,0001n/a
Sonoma County Children's Charities Inc$1,00010%
Spirit Rock Meditation Center$8502n/a
City Surf Project$82410%
Mindful Schools$76230%
Young Men's Christian Association of San Francisco$75030%
Cancer Support Community Greater Philadelphia$70020%
The Foundation of the City College of San Francisco$70020%
Hilarity for Charity Inc$52710%
Williams College$50020%
Sonoma County Regional Parks Foundation$50010%
Homeless Prenatal Program Inc$50020%
San Francisco Parks Alliance$50010%
Fred Hutchinson Cancer Research Center$50010%
Youngmoms$50010%
Santa Cruz Community Health Centers$50010%
Collegiate School Inc$50010%
Manomet Inc$50010%
Nest Inc$50010%
Scleroderma Research Foundation$50010%
Sports Humanitarian Group Inc$50010%
826 Valencia$50010%
Children's Council of San Francisco$50020%
Pacifica Spindrift Players$50010%
All Stars Helping Kids Inc$50010%
US Naval Academy Foundation Inc$50010%
The American Society for the Prevention of Cruelty to Animals$50010%
Children's Nutrition Program of Haiti Inc$50010%
Sonoma Valley Education Foundation$45010%
International Rescue Committee INC$35010%
Breakthrough T1d$30030%
San Francisco Museum of Modern Art$30010%
Interfaith Center at the Presidio$30030%
Rodman For Kids Inc$27010%
American Friends of Zanaafrica Corp$26310%
Enneagram Prison Project$25010%
Charles River Episcopal Co-Housing Endeavor Inc$25010%
Boomer Esiason Foundation$25010%
Birthright Africa Incorporated$25010%
Big Brothers Big Sisters of the Bay Area$25010%
The Pulmonary Hypertension Association Inc$25010%
Willow Domestic Violence Center of Greater Rochester Inc$25010%
Memorial Sloan-Kettering Cancer Center$25010%
42nd Street Moon$25010%
Direct Relief$2501n/a
Edgewood Center for Children and Families$25010%
Huckleberry Youth Programs Inc$25010%
ALS Network$20010%
Wylder Nation Foundation$20010%
San Francisco Suicide Prevention$20010%
Reclaim Childhood Inc$1501n/a
Organic Farming Research Foundation$15010%
Every Mother Counts$10610%
National Brain Tumor Society Inc$10010%
San Francisco AIDS Foundation$10010%
St Jude Children's Research Hospital Inc$5010%
Central Park Conservancy Inc$3510%

What it could do for these grantees

Plus 117 recipients with no EIN on record ($1.0M), not named here.

Where it is load-bearing

Wendell Family Foundation supplied at least a quarter of the budget for 1 of its grantees at some point. The chart plots its 158 largest grantees; load-bearing ones sit top left.

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetGolden Gate National Parks Conservancy: $1,646,700 over 9y, 0.8% of budgetThe Trustees of Princeton University: $1,011,617 over 9y, 0.0% of budgetChronicle Season of Sharing Fund: $345,000 over 9y, 0.4% of budgetJohns Hopkins University: $200,000 over 3y, 0.0% of budgetThe Exploratorium: $163,000 over 9y, 0.1% of budgetCottage 1886 Foundation Inc: $118,000 over 3y, 38% of budgetThe Hamlin School: $109,000 over 7y, 0.1% of budgetUniversity of California San Francisco Foundation: $103,750 over 4y, 0.0% of budgetGrassroot Soccer Inc: $53,000 over 9y, 0.2% of budgetFishers Island Conservancy Inc: $50,000 over 1y, 12% of budgetPratham USA: $40,000 over 3y, 0.1% of budgetPalo Alto Players Peninsula Center Stage: $31,000 over 6y, 1.8% of budgetThe American India Foundation: $30,500 over 7y, 0.1% of budgetChildren's Day School Inc: $30,000 over 1y, 0.1% of budgetTown School for Boys: $29,400 over 6y, 0.0% of budgetSan Francisco Education Fund: $28,545 over 7y, 0.3% of budgetFoundation for Student Communicationinc: $27,500 over 9y, 0.8% of budgetPrinceton-Blairstown Center Inc: $25,500 over 9y, 0.3% of budgetIsles Inc: $25,500 over 4y, 0.1% of budgetUniversity High School: $24,100 over 9y, 0.1% of budgetUTEC Inc: $22,000 over 9y, 0.1% of budgetSan Francisco University High School: $21,200 over 6y, 0.0% of budgetRedwood Credit Union Community Fund Inc: $20,000 over 1y, 0.1% of budgetEdwell Inc: $20,000 over 2y, 1.2% of budgetPan-Massachusetts Challenge Inc: $17,185 over 9y, 0.0% of budgetPrinceton in Africa Inc: $16,000 over 6y, 1.4% of budgetSan Francisco Ballet Association: $15,000 over 2y, 0.0% of budgetSjogren's Foundation Inc: $12,500 over 4y, 0.2% of budgetMarin Country Day School: $10,000 over 1y, 0.0% of budgetSuny New Paltz Foundation Inc: $10,000 over 2y, 0.1% of budgetKipp Bay Area Schools: $10,000 over 1y, 0.0% of budgetPennsylvania Hospital of the University of Pennsylvania Health System: $10,000 over 1y, 0.0% of budgetFoundation for Excellence Inc: $9,750 over 2y, 0.3% of budgetLewis W Butler Foundation: $9,000 over 4y, 1.5% of budgetThe Center for Reproductive Rights Inc: $8,081 over 5y, 0.0% of budgetSafe & Sound: $8,000 over 3y, 0.0% of budgetTen Strands: $8,000 over 7y, 0.1% of budgetAmerican Institute of Chemical Engineers: $7,000 over 3y, 0.0% of budgetTeach for America Inc: $7,000 over 3y, 0.0% of budgetUS Lacrosse Inc: $5,500 over 5y, 0.0% of budgetCoaching Corps: $5,500 over 5y, 0.0% of budgetAim High: $5,500 over 7y, 0.2% of budgetFriends of St Stephen's Youth Programs Inc: $5,250 over 5y, 0.2% of budgetPeer Health Exchange Inc: $5,084 over 3y, 0.0% of budgetOccidental College: $5,000 over 1y, 0.0% of budgetThe Bridge of Books Foundation Inc: $5,000 over 1y, 9.5% of budgetThe Houston Food Bank: $5,000 over 1y, 0.0% of budgetHealthright 360: $5,000 over 1y, 0.0% of budget

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 158.

Nonprofits that may fit its grantmaking

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.

Marin Community FoundationCA42.3× affinity28 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Marin Community Foundation · The San Francisco Foundation · Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma · Silicon Valley Community Foundation · Robert and Dana Emery Family Foundation Rockefeller Trust Company · Lisa & Douglas Goldman Fund · The Goldman Sachs Charitable Gift Fund · McNabb Foundation · The Stanley S Langendorf Foundation · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Bothin Foundation · John Pritzker Family Fund

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.

Compare Wendell Family Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Wendell Family Foundation?

Find your warmest path to Wendell Family 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.

About Wendell Family Foundation

How much does Wendell Family Foundation give?
Wendell Family Foundation reported 51 grants totaling $902,950 in its FY2025 IRS filing. It funded between 40 and 99 organizations a year over FY2018 to FY2024.
What does Wendell Family Foundation fund?
By grant dollars over FY2017 to FY2025, its largest causes are Education (35%), Recreation & Sports (31%), Social Science (7%).
Who are Wendell Family Foundation's largest grantees?
By total granted over FY2017 to FY2025: Golden Gate National Parks Conservancy ($1.6M), The Trustees of Princeton University ($1.0M), Chronicle Season of Sharing Fund ($345k).
Does Wendell Family Foundation fund new organizations?
In FY2024, 23% of the organizations it funded were first-time grantees.
Does Wendell Family Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as Wendell Family Foundation?
Its strongest co-funders, measured against what their size predicts, include Marin Community Foundation, The San Francisco Foundation, Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma.
Where is Wendell Family Foundation based?
Wendell Family Foundation is based in CA.

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 302 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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