· Private foundation
Sundheimer 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.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k11 grants · $47k
- $10k–50k3 grants · $46k
| Recipient | Amount |
|---|---|
| RABENSTEIN LEARNING CENTER | $18,000 |
| COMMUNITY CTR OF THE ROCKAWAY PENIN | $18,000 |
| CENTER FOR INITIATIVES IN JEWISH ED | $10,000 |
| LIGHTHOUSE GUILD INTERNATIONAL | $5,000 |
| Individual grant recipient | $5,000 |
| AMERICAN CIVIL LIBERTIES UNION | $5,000 |
| MANHATTAN EYE EAR HOSPITAL | $5,000 |
| YESHIVA UNIVERSITY | $5,000 |
| ANTI-DEFAMATION LEAGUE | $5,000 |
| US HOLOCAUST MEMORIAL MUSEUM | $5,000 |
| JEWISH NATIONAL FUND | $5,000 |
| BOCA RATON KOLLEL | $2,500 |
| RCCS | $2,500 |
| LAPID YESHIVA INC | $1,800 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Your human-services grants (FY17–23, $21k) land where the poverty rate runs at 17%, against an area that typically sits at 10%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
20 repeat relationships — 8 still active in FY2024, 12 since wound down; 5 grantees were first funded in FY2024 (too recent to call).
How the two cohorts compare
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2024, 75% of grant dollars renewed an existing relationship; $22k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). 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
- CCCOMMUNITY CENTER OF THE ROCKAWAY PENINSULA INC3× · 2022–2024 · $49k · revenue +278%
- ALANTI-DEFAMATION LEAGUE6× · 2017–2024 · $38k · revenue +78%
- TUThe United States Holocaust Memorial Museum6× · 2017–2024 · $30k · revenue +9%
Funded once
DIRECT RELIEFgraduatedone grant, 2017 · $5k · revenue +94%- JSJUILLIARD SCHOOLgraduatedone grant, 2017 · $3k · revenue +64%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
Nyu is a private university with approximately 60,000 matriculating students in 20 schools and institutes. nyu's primary missions are education, research and scholarship, and patient care.
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.
Biu produces students who excel in the sciences, humanities, law, engineering, business & the arts.
The alliance leads new york citys mission to end sexual violence through education, prevention programming, research, and policy change. until we end sexual violence in all forms, we will be here for all survivors and the organizations…
The architectural league of new york supports critically transformative work in the allied fields that shape the built environment. as a vital, independent forum, the league stimulates thinking, debate, and action on today's (continued on…
Jobsfirstnyc's mission is to create and advance solutions that break down barriers and transform the systems supporting young adults and their communities in the pursuit of economic opportunities.
The graduate center foundation is committed to promoting and safe-guarding the success of the graduate center by raising funds and managing and investing donations for use by the graduate center. the board of trustees of the foundation…
The mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.
Jcrc-ny builds relationships to advance the values, interests and security of the new york jewish community and to create a more interconnected new york for all.
The new york city gay and lesbian anti-violence project (avp) mission is to empower lgbtq and hiv-affected communities and allies to end all forms of violence through organizing and education, and support survivors through counseling and…
Shalom school's mission is to provide each child with an outstanding education in a nurturing environment that is academically excellent, inclusive, innovative, and inspired by jewish values and traditions.
We generate ideas, produce evidence, and design solutions to improve the lives of underserved populations around the world. we take a multidisciplinary, intergenerational, life-cycle approach that contributes to (see schedule o)four global…
For reference, the grantee most central to the portfolio’s shape is Selfhelp Community Services Inc and the most unlike its peers is Lapid Yeshiva Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
Your grantees are a median of 37 years old; the field is 17. You back the established end — and your money leans older still.
The field is 20% startups (under 5 years old) — 5% of your grantees by number, and just 1% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 12% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
22 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 22 of the 28 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds COMMUNITY CENTER OF THE ROCKAWAY PENINSULA INC ↗
- Who funds ANTI-DEFAMATION LEAGUE ↗
- Who funds The United States Holocaust Memorial Museum ↗
- Who funds MEDECINS SANS FRONTIERES USA INC ↗
- Who funds JEWISH NATIONAL FUND (KEREN KAYEMETH LEISRAEL) INC ↗
- Who funds LIGHTHOUSE GUILD INTERNATIONAL INC ↗
- Who funds COLON CANCER CHALLENGE FOUNDATION ↗
- Who funds YESHIVA UNIVERSITY ↗
- Who funds CITYMEALS-ON-WHEELS ↗
- Who funds SELFHELP COMMUNITY SERVICES INC ↗
- Who funds CITY HARVEST INC ↗
- Who funds DRESS FOR SUCCESS WORLDWIDE ↗
- Who funds NEW YORKERS AGAINST GUN VIOLENCE INC ↗
- Who funds THE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS ↗
- Who funds DIRECT RELIEF ↗
- Who funds HABITAT FOR HUMANITY NEW YORK CITY AND WESTCHERSTER COUNTY INC ↗
- Who funds ELIZABETH GLASER PEDIATRIC AIDS FOUNDATION ↗
- Who funds SOUTHERN POVERTY LAW CENTER INC ↗
- Who funds JUILLIARD SCHOOL ↗
- Who funds LAPID YESHIVA INC ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
Open a dossier: Jewish Communal Fund · National Philanthropic Trust · American Online Giving Foundation Inc · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization Sundheimer Foundation funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal or a single department — and drag the year to watch it move.
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 your grant caused the public funding. Coverage is precision-first — a floor, not 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 12–24 months.
Warm introductions · Powered by PlinthPlus
How do I get to Sundheimer Foundation?
Find your warmest path to Sundheimer 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.