· Private foundation
S & L Marx 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 FY2018–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k81 grants · $280k
- $10k–50k35 grants · $551k
- $50k–250k18 grants · $1.8M
- $250k+4 grants · $2.0M
| Recipient | Amount |
|---|---|
| YALE UNIVERSITY | $1,000,000 |
| JEWISH BOARD OF FAMILY & CHILDRENS SERVICES INC | $500,000 |
| STANFORD UNIVERSITY - GSB | $250,000 |
| BRUNSWICK SCHOOL INC | $250,000 |
| HOSPITAL FOR SPECIAL SURGERY FUND INC | $200,000 |
| GREENWICH ACADEMY INC | $200,000 |
| Boys and Girls Club of Greenwich | $150,000 |
| YALE UNIVERSITY | $125,000 |
| YALE UNIVERSITY | $125,000 |
| CAMPHILL VILLAGE U S A INC | $100,000 |
| TAFT SCHOOL CORPORATION | $100,000 |
| YALE UNIVERSITY | $100,000 |
| ALZHEIMERS DISEASE AND RELATED DISORDERS ASSOCIATI | $100,000 |
| YONKERS PARTNERS IN EDUCATION INC | $75,000 |
| WESTCHESTER ARC FOUNDATION INC | $75,000 |
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 (FY18–24, $1.6M) land where the poverty rate runs at 15%, against an area that typically sits at 11%. 78% 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.
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 12% of S & L Marx Foundation’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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +29% since the first grant, against +7% for the ones you funded once.
160 repeat relationships — 110 still active in FY2024, 50 since wound down; 8 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, 99% of grant dollars renewed an existing relationship; $49k 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
- BSBRUNSWICK SCHOOL INC7× · 2018–2024 · $1.2M · revenue +9%
- JBJEWISH BOARD OF FAMILY & CHILDREN'S SERVICES INC5× · 2020–2024 · $1.1M · revenue +4%
Williams College7× · 2018–2024 · $759k · revenue +36%
Funded once
- MRMIANUS RIVER GORGE PRESERVEone grant, 2019 · $100k
- NHNEW HAVEN FARMS INCone grant, 2019 · $20k · revenue 0%
- YSYALE SLIFKA CENTERone grant, 2019 · $15k
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.
The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…
Fordham university, the jesuit university of new york, is committed to the discovery of wisdom and the transmission of learning, through research and through education of the highest quality. for more information, see schedule o.
Research, education and general - princeton university is a private not-for-profit, non-sectarian institution of higher learning with approximately 5,700 undergraduate and 3,300 graduate students. 2,500 students graduated in the 2024-2025…
To educate students to be ethical and socially responsible leaders in a global community.
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.
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.
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.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Mitchell college educates students through a highly individualized educational approach that brings forward each student's potential, reveals their strengths, and fosters personal growth.
For reference, the grantee most central to the portfolio’s shape is Uja Federation of Greenwich Inc and the most unlike its peers is Israel Lacrosse Association Inc. 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 21. You back the established end — and your money leans older still.
The field is 18% startups (under 5 years old) — 1% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 1% 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.
154 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. 154 of the 213 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
Showing your 200 largest grantees by grant value.
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 BRUNSWICK SCHOOL INC ↗
- Who funds JEWISH BOARD OF FAMILY & CHILDREN'S SERVICES INC ↗
- Who funds THE GREENWICH LIBRARY ↗
- Who funds Williams College ↗
- Who funds THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY ↗
- Who funds TRICKLE UP PROGRAM INC ↗
- Who funds The Hospital for Special Surgery Fund Inc ↗
- Who funds LET'S GET READY INC ↗
- Who funds ALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC ↗
- Who funds GREENWICH ACADEMY INC ↗
- Who funds WATERSIDE SCHOOL INC ↗
- Who funds BIRTHRIGHT ISRAEL FOUNDATION ↗
- Who funds CHILD GUIDANCE CENTER OF SOUTHERN CONNECTICUT INC ↗
- Who funds HARLEM ACADEMY ↗
- Who funds JOSEPH SLIFKA CENTER FOR JEWISH LIFE AT ↗
- Who funds BOYS & GIRLS CLUB OF GREENWICH ↗
- Who funds AMERICAN FRIENDS OF HEBREW UNIVERSITY INC ↗
- Who funds YONKERS PARTNERS IN EDUCATION INC ↗
- Who funds CAMPHILL VILLAGE USA INC ↗
- Who funds CYSTIC FIBROSIS FOUNDATION ↗
- Who funds FSHD SOCIETY ↗
- Who funds THE TAFT SCHOOL CORPORATION ↗
- Who funds THE MULTIPLE MYELOMA RESEARCH FOUNDATION INC ↗
- Who funds CHILDREN'S LEARNING CENTERS OF FAIRFIELD COUNTY INC ↗
- Who funds WESTCHESTER ARC FOUNDATION INC ↗
- Who funds BRUCE MUSEUM INC ↗
- Who funds THE AURELIA FOUNDATION ↗
- Who funds GREENWICH HOSPITAL ↗
- Who funds Marlboro School of Music Inc ↗
- Who funds STERLING AND FRANCINE CLARK ART INSTITUTE ↗
- Who funds FAIR HAVEN COMMUNITY HEALTH CLINIC 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: Fairfield County's Community Foundation Inc · Jewish Communal Fund · The Goldman Sachs Charitable Gift Fund · First Eagle Investments Foundation · Cornelia Cogswell Rossi Foundation Inc · The New York Community Trust · Jjj Family Foundation · The John L and Sue Ann Weinberg Foundation · Fjc · Ibm International Foundation · The Resource Foundation Inc · Oppenheim Family Fund 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 S & L Marx 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, a single department, or state — and drag the year to watch it move.
- Abilis Inc — 74% of income from government
- Kids in Crisis Inc — 49% of income from government
- Jewish Family Services of Greenwich — 41% of income from government
- Children's Learning Centers of Fairfield County Inc — 36% of income from government
- Save the Children Federation Inc — 30% of income from government
- Liberation Programs Inc — 24% of income from government
- Family Centers Inc — 20% of income from government
- Fair Haven Community Health Clinic Inc — 18% of income from government
- Stamford Center for the Arts Inc — 18% of income from government
- Operation Hope of Fairfield Inc — 15% of income from government
- Project Music Inc — 14% of income from government
- Yale University — 12% of income from government
- Gather New Haven Inc (Formely New Haven Land Trust Inc) — 11% of income from government
- Planned Parenthood of Southern New England Inc — 10% of income from government
- President and Fellows of Harvard College — 7% of income from government
- Boys & Girls Club of Greenwich — 7% of income from government
- Squash Haven Inc — 4% of income from government
- Thames Valley Music School Inc — 3% of income from government
- Shatterproof a Nonprofit Corporation — 2% of income from government
- Neads Inc — 1% of income from government
- Greenwich Symphony Orchestra Inc — 1% of income from government
- Pilobolus Inc — 1% of income from government
- Bruce Museum Inc — 0% of income from government
- Connecticut College — 0% of income from government
- Trinity College — 0% of income from government
- Greenwich Hospital — 0% of income from government
- Williams College — 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 S & L Marx Foundation?
Find your warmest path to S & L Marx 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.