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The Sundheim Family Foundation at a glance

· Private foundation

The Sundheim Family 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.

$5.1M
Granted FY2024still arriving
13
Grants FY2024still arriving
4
States reached
$1.5M
Largest
01What it fundsRead
02Its granteesRead
03Its fieldRead
04Through PlinthRead
01What it funds
0189% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2024.

Education$14MHealth$6.1MArts & Culture$2.0MInternational$325kPhilanthropy$250kAnimals$140kReligion$35kHuman Services$30kOther$0
02FY2024 · 13 grants

Where the money goes

Grants by size, and the largest recipients.

How this is measured
The 13 grants below total $4,948,171, the rows itemized in this filing. The $5,078,171 headline is the total grant expense on the return; the other $130,000 is giving the schedule does not break out (grants under the $5,000 itemization floor, grants to individuals, grants on other schedules). Every figure below describes the itemized rows only.

By grant size · FY2024

  • $10k–50k5 grants · $110k
  • $50k–250k3 grants · $300k
  • $250k+5 grants · $4.5M
$50,000
Median grant
4
States reached
$104M
Total assets
Largest grants
RecipientAmount
Ransom Everglades School$1,500,000
Trustees of the University of Pennsylvania$1,087,808
New York University$1,000,000
Diabetes Research Institute Foundation$500,000
The Museum of Modern Art$450,000
Trustees of the University of Pennsylvania$200,000
Central Fund of Israel$50,000
Greater Miami Jewish Federation$50,000
United Jewish Appeal Federation of Jewish Philanthropies of NY Inc$25,000
Chabad Center of Kendall Inc$25,000
United Jewish Appeal Federation of Jewish Philanthropies of NY Inc$25,000
United Jewish Appeal Federation of Jewish Philanthropies of NY Inc$25,000
Invest for Kids Inc$10,363
02Its grantees
repeat funding

Who it funds again

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

87%of every dollar goes to organizations it has funded before.
$16M · 8 repeat orgs$2.4M to everyone else

Grantees it renews have grown median revenue +42% since the first grant, against +9% for those funded once.

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

How the two cohorts compare

Re-uppedFunded once

Organizations

8
15

Total granted

$16M
$2.3M

Median revenue growth · since first grant

+42%
+9%

Still filing today

100%
47%

New vs renewed · share of each year

In FY2024, 96% of grant dollars renewed an existing relationship; $160k went to new ones.

50%100%’21’22’23’24
RenewedFirst-time

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

’21’22’23’24
HealthEducationPhilanthropyArts & CultureAnimalsInternationalOther
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

  • UO
    University of Miami
    2× · 2022–2023 · $5.0M · revenue +29%
  • RE
    RANSOM EVERGLADES SCHOOL INC
    3× · 2022–2024 · $4.5M · revenue +34%
  • NY
    New York University
    3× · 2021–2024 · $3.0M · revenue +30%

Funded once

  • HF
    HEROES FOUNDATION INC
    one grant, 2021 · $1.0M · revenue +9%
  • NY
    New York University School of Medicine
    one grant, 2023 · $1.0M
  • TS
    THE SOUTHAMPTON FRESH AIR HOMEgraduated
    one grant, 2023 · $50k · revenue +33%
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.

03Its 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
Bar Ilan University in Israel Inc

Biu produces students who excel in the sciences, humanities, law, engineering, business & the arts.

—
2
Weizmann Institute of Science

The weizmann institute of science, located in rehovot, israel, is one of the worlds top-ranking, multidisciplinary research institutions. at any one time, several thousand scientists, staff and students are involved in hundreds of research…

Science & Tech
3
Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation

The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.

Science & Tech
4
University of Judaism Foundation
—
5
American Friends of Hebrew University Inc

Support the hebrew univ. of jerusalem, israel's foremost center of higher edu. & research.

International
6
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
7
United States Naval Institute

Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.

—
8
Dana-Farber Cancer Institute Inc

The mission of dfci is to provide expert, compassionate, and equitable care to children, adults, and their families, while advancing the understanding, diagnosis, treatment, cure, and prevention of cancer and related diseases. we train new…

Health
9
Albert Einstein College of Medicine

Committed to exceptional healthcare quality for all and actively engaged with our community, einstein drives scientific discovery and educates compassionate leaders in health and science.

Education
10
New York Genome Center Inc

Operate a state-of-the-art, world-class genomic research center that creates and uses advanced genomics to understand the genetic basis of disease. for more information, see schedule o.

Health
11
Yeshiva University

The university is composed of several colleges and schools providing undergraduate, graduate, professional and post-doctoral education and training and research and clinical programs.

Education
12
Samuel Waxman Cancer Research Foundation

The samuel waxman cancer research foundation (the "foundation") funds innovative research to bring faster cures to patients. in addition to supporting ongoing collaborative research in specific cancers, our scientists are investigating the…

—
How this is measured
The grantee most central to the portfolio’s shape is The Israel Innovation Fund Inc; the most unlike its peers is No Dogs Left Behind. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
03the grantee network

22 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. 22 of the 31 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)
2
Early backer (in before they grew)
22/22
Grantees still filing
15/22
Grew since first funded

Where the money sits, by cause and then by grantee

University of Miami: $5,000,000 · EducationUniversity of MiamiRANSOM EVERGLADES SCHOOL INC: $4,500,000 · EducationRANSOM EVERGLADES SCHOOL INCTRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $3,890,101 · EducationTRUSTEES OF THE UNIVERSITY OF PENNSYLVANIANew York University: $3,000,000 · EducationNew York UniversityDIABETES RESEARCH INSTITUTE FOUNDATION INC: $1,515,000 · HealthDIABETES RES…HEROES FOUNDATION INC: $1,000,000 · HealthHEROES FOUND…+2 more: $60,000 · HealthMuseum of Modern Art: $1,971,150 · Arts & CultureMuseum of…+1 more: $40,000 · Arts & CultureNew York University School of Medicine: $1,000,000 · Other+11 more: $175,588 · OtherCHARITIES AID FOUNDATION AMERICA: $250,000 · PhilanthropyGREATER MIAMI JEWISH FEDERATION INC: $125,000 · PhilanthropyUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $75,000 · PhilanthropyCHARLOTTE HORNETS FOUNDATION INC: $40,000 · PhilanthropyAMERICA GIVES INC: $20,000 · PhilanthropyNO DOGS LEFT BEHIND: $110,000 · AnimalsVETERINARY CARE FOUNDATION INCORPORATED: $30,000 · AnimalsCentral Fund of Israel: $50,000 · InternationalCenter for a New American Security Inc: $25,000 · International
Education$16,390,101Health$2,575,000Arts & Culture$2,011,150Other$1,175,588Philanthropy$510,000Animals$140,000International$75,000

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 budgetUniversity of Miami: $5,000,000 over 2y, 0.1% of budgetRANSOM EVERGLADES SCHOOL INC: $4,500,000 over 3y, 2.2% of budgetTRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $3,890,101 over 2y, 0.0% of budgetNew York University: $3,000,000 over 3y, 0.0% of budgetMuseum of Modern Art: $1,971,150 over 4y, 0.2% of budgetDIABETES RESEARCH INSTITUTE FOUNDATION INC: $1,515,000 over 3y, 7.0% of budgetCHARITIES AID FOUNDATION AMERICA: $250,000 over 1y, 0.0% of budgetGREATER MIAMI JEWISH FEDERATION INC: $125,000 over 2y, 0.1% of budgetNO DOGS LEFT BEHIND: $110,000 over 2y, 56% of budgetUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $75,000 over 1y, 0.0% of budgetCentral Fund of Israel: $50,000 over 1y, 0.1% of budgetTHE SOUTHAMPTON FRESH AIR HOME: $50,000 over 1y, 2.6% of budgetTHE ISRAEL INNOVATION FUND INC: $40,000 over 1y, 13% of budgetCHARLOTTE HORNETS FOUNDATION INC: $40,000 over 2y, 6.1% of budgetVETERINARY CARE FOUNDATION INCORPORATED: $30,000 over 2y, 0.4% of budgetCenter for a New American Security Inc: $25,000 over 1y, 0.2% of budgetAMERICA GIVES INC: $20,000 over 1y, 0.1% of budgetInvest for Kids Inc: $10,363 over 1y, 0.5% of budgetThe Pride Foundation: $10,225 over 1y, 0.1% of budgetLUPUS RESEARCH ALLIANCE INC: $10,000 over 1y, 0.0% of budgetBELEV ECHAD INC: $10,000 over 1y, 0.1% 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.

National Philanthropi…The Ayco Charitable F…Mightycause Charitabl…Charities Aid Foundat…Gs Donor Advised Phil…The Bank of America C…Vanguard Charitable E…Donor Advised Charita…American Online Givin…Fidelity Investments …Amazonsmile Foundation
National Philanthropic TrustPA12.3× affinity8 shared granteesties to 10 of 10Hover any node to trace its alignments.Compare side by side →

Open a dossier: National Philanthropic Trust · The Ayco Charitable Foundation · Mightycause Charitable Foundation · Charities Aid Foundation America · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · The Bank of America Charitable Foundation Inc · Vanguard Charitable Endowment Program · Donor Advised Charitable Giving Inc · American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund · 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.
04Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to The Sundheim Family Foundation?

Find your warmest path to The Sundheim 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.

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 31 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

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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