· Private foundation
Marrus Family 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.
Read this first · the figures below need context
67% of Marrus Family Foundation Inc’s FY2024 grant dollars went to American Endowment Foundation, not to grantees.
Its money now reaches organizations through that sponsor, which does not report who recommended each grant. FY2024 names 30 organizations directly, so a portfolio cannot be read from it.
Organizations named directly on the return
Amber years are those where most dollars went to a sponsor.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2022–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k48 grants · $120k
- $10k–50k12 grants · $185k
- $50k–250k3 grants · $239k
- $250k+1 grant · $1.0M
| Recipient | Amount |
|---|---|
| AMERICAN ENDOWMENT FOUNDATION | $1,000,000 |
| BRIGHAMS AND WOMENS HOSPITAL | $100,000 |
| CONGREGATION EMANUEL | $88,550 |
| JUMPSTART | $50,000 |
| RISING TREETOPS AT OAKHURST | $30,000 |
| OPENING ACT | $25,000 |
| DARTMOUTH COLLEGE | $20,000 |
| THE BUCKLEY SCHOOL | $16,000 |
| WELLESLEY COLLEGE | $15,000 |
| COUNT BASIE THEATER FOUNDATION | $15,000 |
| CAMP DUDLEY YMCA | $12,500 |
| THE SUMMER CAMP | $11,000 |
| WAKE FOREST UNIVERSITY | $10,500 |
| WILLIAMS COLLEGE | $10,000 |
| GRAND STREET SETTLEMENT INC | $10,000 |
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 (FY22–24, $64k) 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.
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.
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.
61 repeat relationships — 52 still active in FY2024, 9 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, 97% of grant dollars renewed an existing relationship; $16k 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
- RTRISING TREETOPS AT OAKHURST3× · 2022–2024 · $91k · revenue +11%
ST MARK'S SCHOOL OF SOUTHBOROUGH INC3× · 2022–2024 · $60k · revenue +16%- WCWellesley College3× · 2022–2024 · $46k · revenue +3%
Funded once
- EAEYE AND EAR HOSPITALone grant, 2023 · $50k
- VHVNA HEALTH GROUPone grant, 2023 · $25k
- ECEPISCOPAL CHARITIESone grant, 2022 · $5k
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.
To educate students to be ethical and socially responsible leaders in a global community.
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
Dickinson college provides a useful, innovative and interdisciplinary education in the liberal arts and sciences to prepare students to lead rich and fulfilling lives of engaged global citizenship
At sarah lawrence college, our mission is to graduate citizens of the world who are diverse in every definition of the word, who take intellectual and creative risks, and who are able to focus exceptional intellectual discipline (continued…
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.
As a diverse community of learners, we cultivate integrity, curiosity, connection and resilience.
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…
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.
Mitchell college educates students through a highly individualized educational approach that brings forward each student's potential, reveals their strengths, and fosters personal growth.
Manhattan school of music is deeply committed to excellence in education, performance, and creative activity; to the humanity of the school's environment; and to the cultural enrichment of the larger community. a premiere international…
Barnard college aims to provide the highest quality liberal arts education to promising and high-achieving young women, offering the unparalleled advantages of an outstanding residential college in partnership with a major research…
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…
For reference, the grantee most central to the portfolio’s shape is The Young People's Chorus of New York City Inc and the most unlike its peers is Wake Forest University. 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 40 years old; the field is 19. You back the established end — and your money leans older still.
The field is 18% startups (under 5 years old) — 2% of your grantees by number, and just 6% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 11% 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.
50 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. 50 of the 98 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 AMERICAN ENDOWMENT FOUNDATION ↗
- Who funds JUMPSTART FOR YOUNG CHILDREN INC ↗
- Who funds RISING TREETOPS AT OAKHURST ↗
- Who funds Trustees of Dartmouth College ↗
- Who funds Opening Act Inc ↗
- Who funds ST MARK'S SCHOOL OF SOUTHBOROUGH INC ↗
- Who funds TRUSTEES OF PHILLIPS ACADEMY ↗
- Who funds POMFRET SCHOOL INCORPORATED ↗
- Who funds Wellesley College ↗
- Who funds THE ARTHUR PROJECT ↗
- Who funds THE SUMMER CAMP INC ↗
- Who funds CAMP DUDLEY INC ↗
- Who funds Williams College ↗
- Who funds WAKE FOREST UNIVERSITY ↗
- Who funds MONMOUTH MEDICAL CENTER FOUNDATION INC ↗
- Who funds THE SPENCE SCHOOL ↗
- Who funds FRIENDS OF HUDSON RIVER PARK INC ↗
- Who funds THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK ↗
- Who funds GRAND STREET SETTLEMENT INC ↗
- Who funds BROWN UNIVERSITY ↗
- Who funds CITIZENS COMMITTEE FOR CHILDREN OF NEW YORK INC ↗
- Who funds LEE PESKY LEARNING CENTER INC ↗
- Who funds READING PARTNERS ↗
- Who funds BOTTOMLESS CLOSET ↗
- Who funds SALVADORI CENTER LTD ↗
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: The New York Community Trust · Pinkerton Foundation · Jewish Communal Fund · National Philanthropic Trust · The Mercy Family Foundation Inc · The Keith Haring Foundation Inc · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Morgan Stanley Global Impact Funding Trust Inc · Mother Cabrini Health Foundation Inc · Verizon Foundation · American Endowment Foundation · The Goldman Sachs Charitable Gift Fund
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 Marrus Family 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.
- Lunch Break Inc — 4% of income from government
- Learning Ally Inc — 4% of income from government
- Wellesley College — 1% of income from government
- Pan-Massachusetts Challenge Inc — 0% of income from government
- Blair Academy — 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 Marrus Family Foundation Inc?
Find your warmest path to Marrus Family 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.