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California · Private foundation

Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern

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.

$450k
Granted FY2025(still arriving)
11
Grants FY2025
12
Organizations funded FY2024
17%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$30,000
Largest grant, FY2025
$75,000
Organizations funded a year
12 to 16
FY2018 to FY2024
States reached, FY2025
2
Total assets, FY2025
$3.9M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 17% of the organizations Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern funded were first-time grantees, receiving 17% of its grant dollars.

New vs renewed · share of each year

In FY2024, 83% of grant dollars renewed an existing relationship; $25k 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
EnvironmentArts & CultureOther
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 arriving11$450k0%
FY202412$150k17%
FY202312$170k0%
FY202212$215k17%
FY202112$160k8%
FY202014$210k21%
FY201913$185k0%
FY201816$225k6%
100% classified

What it funded, over time

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

Education$630kArts & Culture$345kHealth$340kYouth Development$230kFood & Nutrition$150kScience & Tech$130kRecreation & Sports$75kEnvironment$60kOther$0

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
Harvey Mudd College$220,00090%
Tucson Children's Museum Inc Dba Children's Museum Tucson$175,00092%
Tu Nidito Children and Family Services Inc$125,00092%
Big Brothers Big Sisters of Southern Arizona Incorporated$110,00091%
Community Food Bank Inc$105,0005n/a
Think Earth Enviromental Education Foundation$60,0003n/a
Community Food Bank Inc$45,00030%
Reading With Rover$30,0003n/a
Key to Change$10,00014%

Plus 17 recipients with no EIN on record ($1.1M), not named here.

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 set of overlaps that mostly run through this funder rather than between each other.

Amazonsmile FoundationWA2.4× affinity5 shared granteesties to 0 of 0Hover any node to trace its alignments.Compare side by side →

Open a dossier: Amazonsmile 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.

Compare Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern?

Find your warmest path to Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern 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 Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern

How much does Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern give?
Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern reported 11 grants totaling $450,000 in its FY2025 IRS filing. It funded between 12 and 16 organizations a year over FY2018 to FY2024.
What does Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern fund?
By grant dollars over FY2017 to FY2025, its largest causes are Education (32%), Arts & Culture (17%), Health (17%).
Who are Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern's largest grantees?
By total granted over FY2017 to FY2025: Harvey Mudd College ($220k), Tucson Children's Museum Inc Dba Children's Museum Tucson ($175k), Tu Nidito Children and Family Services Inc ($125k).
Does Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern fund new organizations?
In FY2024, 17% of the organizations it funded were first-time grantees.
Does Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern 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 Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern?
Its strongest co-funders, measured against what their size predicts, include Amazonsmile Foundation.
Where is Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern based?
Joseph Stanley Leeds Charitable Foundation C/O Ellis Stern 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 26 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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