· Private foundation
The Mayer Family Foundation
Its FY2025 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 FY2019–2025.
Where the money goes
Your grants by size, and where they go.
The 26 grants below total $772,010 — the rows itemised in this filing. The $803,520 headline is the total grant expense reported on the return, so the remaining $31,510 is giving the schedule does not break out: grants under the $5,000 itemisation floor, grants to individuals, and grants reported on other schedules. Every figure below describes the itemised rows only.
By grant size · FY2023
- Under $10k15 grants · $42k
- $10k–50k8 grants · $80k
- $50k–250k2 grants · $150k
- $250k+1 grant · $500k
| Recipient | Amount |
|---|---|
| Union College | $500,000 |
| Fordham Preparatory School | $100,000 |
| Union College | $50,000 |
| Catholic Academy Of Bridgeport Inc | $10,200 |
| American Museum Of Natural History | $10,000 |
| New York Botanical Garden | $10,000 |
| The Windward School | $10,000 |
| University At Albany Foundation | $10,000 |
| The Metropolitan Opera Guild | $10,000 |
| The Metropolitan Museum Of Art | $10,000 |
| The Greenwich United Way | $10,000 |
| St. Vincent's Hospital Westchester | $7,110 |
| Foundations In Education | $6,000 |
| Breast Cancer Alliance | $5,000 |
| Bruce Museum | $5,000 |
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 +36% since the first grant, against +23% for the ones you funded once.
17 repeat relationships — 17 still active in FY2023, 0 since wound down; 5 grantees were first funded in FY2023 (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 FY2023, 26% of grant dollars renewed an existing relationship; $574k 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
- AMAmerican Museum of Natural History2× · 2022–2023 · $20k · revenue +8%
THE WINDWARD SCHOOL2× · 2022–2023 · $20k · revenue +20%- UAUNIVERSITY AT ALBANY FOUNDATION2× · 2022–2023 · $20k · revenue +95%
Funded once
- TLThe Lake George Association Incone grant, 2022 · $10k · revenue +22%
- RHROUND HILL COMMUNITY CHURCH INCone grant, 2022 · $5k
- WCWGA Caddie Scholarship Fundone grant, 2022 · $3k
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 mission of the brooklyn institute of arts and sciences, d/b/a brooklyn museum (the "museum") is to bring people together through art and experiences that inspire celebration, compassion, courage, and the will to act. (see schedule o).
The Morgan Library & Museum celebrates and shares the history and process of human creativity from antiquity to the present day through the preservation, study, and interpretation of a dynamic and growing collection.
The governors island corporation, doing business as the trust for governors island, is the 501(c)(3) not-for-profit organization created by the city of new york and charged with the planning, redevelopment and ongoing operations of 150…
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…
Bard college seeks to provide a challenging academic program and a supportive environment that fosters a collaborative interchange of ideas in the classroom as well as ambition to achieve excellence.
The new york society library was founded in 1754 by the new york society, a civic-minded group formed in the belief that the availability of books would help the city of new york to prosper.
The Frick Collection (the "Collection") operates an internationally recognized art museum and library program for the inspiration and enjoyment of the public and for the advancement of the study of fine arts and kindred subjects.
Organization's mission statement true to the ambitious vision of its founder and her spirit of creative risk-taking, the mission of the isabella stewart gardner museum is: - to bring to life and preserve the rich historic collection; - to…
Founded in 1881 the Staten Island Museum engages visitors with interdisciplinary exhibitions, public programs, and educational activities for all ages. It is the mission of the Staten Island Museum to spark curiosity and generate…
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
Brooklyn bridge park corporation's mission, d/b/a brooklyn bridge park ("bbp") mission is to provide an exceptional public space that connects people, nature, and the waterfront, through inclusive, innovative, and sustainable management…
The mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.
For reference, the grantee most central to the portfolio’s shape is New York Botanical Garden and the most unlike its peers is Wildlife Conservation Society. 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 71 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) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% 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.
21 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. 21 of the 29 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 Museum of Natural History ↗
- Who funds THE WINDWARD SCHOOL ↗
- Who funds UNIVERSITY AT ALBANY FOUNDATION ↗
- Who funds UNITED WAY OF GREENWICH INC ↗
- Who funds NEW YORK BOTANICAL GARDEN ↗
- Who funds METROPOLITAN MUSEUM OF ART ↗
- Who funds The Metropolitan Opera Guild Inc ↗
- Who funds Wildlife Conservation Society ↗
- Who funds The Lake George Association Inc ↗
- Who funds BRUCE MUSEUM INC ↗
- Who funds Foundations in Education Inc ↗
- Who funds BREAST CANCER ALLIANCE INC ↗
- Who funds Museum of Modern Art ↗
- Who funds THE GREENWICH LAND TRUST INC ↗
- Who funds Bucknell University ↗
- Who funds THE GREENWICH LIBRARY ↗
- Who funds BOYS & GIRLS CLUB OF GREENWICH ↗
- Who funds GREENWICH COUNCIL BOY SCOUTS OF AMERICA INCORPORATED ↗
- Who funds GREENWICH DEPARTMENT OF HUMAN SERVICES FUND INC ↗
- Who funds ST JOSEPH'S HEALTH FUND ↗
- Who funds BOLTON FREE LIBRARY ↗
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 · Morgan Stanley Global Impact Funding Trust Inc · Vanguard Charitable Endowment Program · 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.
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Find your warmest path to The Mayer 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.