· Private foundation
The Martin B Greenberg Foundation Inc
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 $10k44 grants · $40k
- $10k–50k4 grants · $93k
- $50k–250k1 grant · $57k
| Recipient | Amount |
|---|---|
| NORTHWELL HEALTH FOUNDATION | $56,900 |
| JEWISH FEDERATION OF SOUTH PALM BEACH COUNTY | $35,400 |
| NEW YORK-PRESBYTERIAN FUND INC | $25,000 |
| BOCA RATON REGIONAL HOSPITAL FOUNDATION | $22,500 |
| BROWARD PERFORMING ARTS FOUNDATION | $10,000 |
| GUIDING EYES FOR THE BLIND | $6,124 |
| HOFSTRA UNIVERSITY ALUMNI AFFAIRS | $5,000 |
| AMERICAN HEART ASSOCIATION | $5,000 |
| JUNIOR ACHIEVEMENT OF SOUTH FLORIDA | $5,000 |
| GIFT OF LIFE MARROW REGISTRY | $1,300 |
| HILLEL OF BROWARD AND PALM BEACH | $1,000 |
| NORTH SHORE UNIVERSITY HOSPITAL | $1,000 |
| UJA FEDERATION NEW YORK | $1,000 |
| SUNRISE ASSOCIATION | $1,000 |
| NATIONAL DANCE INSTITUTE | $1,000 |
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 (FY17–24, $39k) land where the poverty rate runs at 8%, against an area that typically sits at 10%. 5% of those dollars go to grantees based in above-average-need neighborhoods. Your grants skew toward lower-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.
Which US states your grants reach
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.
Where the work is directed
The same grants, placed two ways — where each recipient sits, and where its stated purpose earmarks the money.
About 15% of The Martin B Greenberg Foundation Inc’s grant dollars are earmarked, by their stated purpose, for a different county than the recipient’s own address — money that lands at a nonprofit in one place but is meant to do its work in another.
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 foundation’s own 990 grant descriptions.
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.
62 repeat relationships — 36 still active in FY2024, 26 since wound down; 11 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, 92% of grant dollars renewed an existing relationship; $13k 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
- NHNORTHWELL HEALTH FOUNDATION7× · 2018–2024 · $412k · revenue +12%
- NYNEW YORK-PRESBYTERIAN FUND INC5× · 2020–2024 · $125k · revenue +8%
- UJUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC6× · 2017–2024 · $87k · revenue +39%
Funded once
- NSNORTH SHORE LIJ FOUNDATIONone grant, 2017 · $51k
- HUHOFSTRA UNIVERSITY ATHLETIC DEPARTMENTone grant, 2022 · $15k
- TFTHE FEINSTEIN INSTITUTES FOR MEDICAL RESEARCHgraduatedone grant, 2018 · $3k · revenue +41%
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.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Long island jewish medical center is part of the northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and…
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
South shore university hospital is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future…
Lenox hill hospital is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future generations…
Northwell health is the parent company of a fully integrated health system that is committed to promote clinical care, health education, conduct biomedical research, and caring for the community regardless of ability to pay.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
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.
For reference, the grantee most central to the portfolio’s shape is National Center for Learning Disabilities Inc and the most unlike its peers is American Museum of Natural History. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 41 years old; the field is 18. You back the established end — and your money leans older still.
The field is 19% startups (under 5 years old) — 1% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 2% lost their exemption, against 10% 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.
93 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. 93 of the 149 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 NORTHWELL HEALTH FOUNDATION ↗
- Who funds JEWISH FEDERATION OF SOUTH PALM BEACH COUNTY INC ↗
- Who funds Boca Raton Regional Hospital Foundation Inc ↗
- Who funds NEW YORK-PRESBYTERIAN FUND INC ↗
- Who funds Nassau County Police Department Foundation Inc ↗
- Who funds UNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC ↗
- Who funds HOFSTRA UNIVERSITY ↗
- Who funds FLORIDA ATLANTIC UNIVERSITY FOUNDATION INC ↗
- Who funds JUNIOR ACHIEVEMENT OF SOUTH FLORIDA INC ↗
- Who funds American Heart Association Inc ↗
- Who funds GUIDING EYES FOR THE BLIND INC ↗
- Who funds SUNRISE DAY CAMPS ASSOCIATION INC ↗
- Who funds BROWARD PERFORMING ARTS FOUNDATION INC ↗
- Who funds BOYS & GIRLS CLUBS OF BROWARD COUNTY INC ↗
- Who funds HOPE & HEROES CHILDREN'S CANCER FUND ↗
- Who funds HILLEL OF BROWARD AND PALM BEACH INC ↗
- Who funds BOCA RATON MUSEUM OF ART ↗
- Who funds BOCA RATON POLICE FOUNDATION INC ↗
- Who funds AMERICAN CANCER SOCIETY INC ↗
- Who funds BOCA RIO FOUNDATION INC ↗
- Who funds AF BEST SECURITIES FOUNDATION INC ↗
- Who funds DYSAUTONOMIA FOUNDATION INC DBA FAMILIAL DYSAUTONOMIA FOUNDATION ↗
- Who funds WORLD OF CHILDREN INC ↗
- Who funds SID JACOBSON JEWISH COMMUNITY CENTER ↗
- Who funds THE FEINSTEIN INSTITUTES FOR MEDICAL RESEARCH ↗
- Who funds CROHN'S & COLITIS FOUNDATION INC ↗
- Who funds NORTH SHORE UNIVERSITY HOSPITAL ↗
- Who funds LONG ISLAND UNIVERSITY ↗
- Who funds Nassau County Museum of Art ↗
- Who funds NATIONAL DANCE INSTITUTE ↗
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 · The Goldman Sachs Charitable Gift Fund · Jpmorgan Chase Foundation · Donna and Steven Aptekar Family Foundation · Robert and Jodi Rosenthal Family Found · Frank J Antun Foundation · Raymond Zimmerman Family Foundation · National Philanthropic Trust · American Express Foundation · Chubb Charitable Foundation · Vanguard Charitable Endowment Program · Morgan Stanley Global Impact Funding Trust Inc
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 The Martin B Greenberg Foundation Inc 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, a single department, or state — and drag the year to watch it move.
- Dana-Farber Cancer Institute Inc — 7% of income from government
- Wounded Warrior Project Inc — 0% of income from government
- Shriners Hospitals for Children — 0% of income from government
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 The Martin B Greenberg Foundation Inc?
Find your warmest path to The Martin B Greenberg Foundation Inc 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.