· Private foundation
John S and Amy S Weinberg 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.
Read this first · the figures below need context
99% of John S and Amy S Weinberg Foundation’s FY2025 grant dollars went to Goldman Sachs Philanthropy Fund, not to grantees.
Its money now reaches organizations through that sponsor, which does not report who recommended each grant. FY2025 names 5 organizations directly, so a portfolio cannot be read from it. Everything below is therefore FY2019, the last year John S and Amy S Weinberg Foundation named its own grantees at scale: 5 organizations, $25k. It is dated, not current.
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 FY2019–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2019
- Under $10k8 grants · $10k
- $10k–50k1 grant · $15k
| Recipient | Amount |
|---|---|
| Foreign Policy Association | $15,000 |
| The Skin Cancer Foundation | $5,000 |
| Smith College | $1,500 |
| STAR, Inc. | $1,000 |
| Friends of the Vineyard Haven Library | $1,000 |
| National MS Society | $500 |
| Call-A-Ride of Greenwich | $500 |
| CPBN/CT Public Broadcasting, Inc. | $500 |
| The Hank Foundation | $300 |
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.
Dollar for dollar, your grants (FY22–25) land where the poverty rate runs at 17%, against an area that typically sits at 11%. 98% of your 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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +90% since the first grant, against +22% for the ones you funded once.
3 repeat relationships — 1 still active in FY2019, 2 since wound down; 19 grantees were first funded in FY2019 (too recent to call). Read against FY2019, the last year this funder named its own grantees directly; its giving has since run through a sponsor, which reports no donor behind each grant.
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 FY2025, 56% of grant dollars renewed an existing relationship; $17k 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
- TCTHE CARNEGIE HALL CORPORATION2× · 2024–2025 · $33k · revenue +13%
- MCMAKE-A-WISH CONNECTICUT2× · 2023–2024 · $30k
- TSTHE SKIN CANCER FOUNDATION INC4× · 2019–2025 · $20k · revenue +90%
Funded once
- FPFOREIGN POLICY ASSOCIATION INCone grant, 2019 · $15k · revenue +22%
- CACALLING ALL CROWS INCgraduatedone grant, 2022 · $15k · revenue +34%
- UJUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INCgraduatedone grant, 2023 · $13k · revenue +34%
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 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.
The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.
Enhance the ability of actec members to provide the most efficient and highest quality services to their clients; develop qualified trust and estate counselors; improve and reform probate, trust and tax laws, procedures, and standards of…
Advance science, engineering, and innovation throughout the world for the benefit of all. the world's largest multidisciplinary scientific society and a leading publisher of cutting-edge research through its science family of journals,…
The institute's mission, as set out in its certificate of incorporation, is to promote the clarification and simplification of the law and its better adaptation to social needs, to secure the better administration of justice, and to…
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
To educate students to be ethical and socially responsible leaders in a global community.
To represent the interests of dermatologists and their patients. to influence and be a credible resource for public and private entities related to all policies and regulations that have the potential to affect the delivery of dermatologic…
Founded in 1780, the american academy of arts and sciences honors excellence and convenes leaders from every field of human endeavor to examine new ideas, address issues of importance to the nation and the world, and work together "to…
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…
Education, research, medical services and other public services.
The nstmf's mission is to build inclusive stem communities across the united states. fundamental to these communities are the significant, inspirational connections we foster between the individuals who have received national recognition…
For reference, the grantee most central to the portfolio’s shape is Naacp Legal Defense & Educ Fund Inc and the most unlike its peers is Call-a-Ride of Greenwich Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
18 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. 18 of the 24 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 GS DONOR ADVISED PHILANTHROPY FUND FOR WEALTH MANAGEMENT INC ↗
- Who funds THE CARNEGIE HALL CORPORATION ↗
- Who funds MARTHA'S VINEYARD COMMUNITY FOUNDATION INC ↗
- Who funds THE SKIN CANCER FOUNDATION INC ↗
- Who funds FOREIGN POLICY ASSOCIATION INC ↗
- Who funds CALLING ALL CROWS INC ↗
- Who funds UNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC ↗
- Who funds NAACP LEGAL DEFENSE & EDUC FUND INC ↗
- Who funds APPLE ORCHARD TRUST ↗
- Who funds United States Ski Team Foundation ↗
- Who funds AMERICAN JEWISH COMMITTEE ↗
- Who funds AMERICAN FARMLAND TRUST ↗
- Who funds THE YARD INC ↗
- Who funds NATIONAL DANCE INSTITUTE ↗
- Who funds AMERICAN ACADEMY OF DERMATOLOGY INC ↗
- Who funds THE TRUSTEES OF THE SMITH COLLEGE ↗
- Who funds Call-A-Ride of Greenwich Inc ↗
- Who funds NATIONAL MULTIPLE SCLEROSIS SOCIETY ↗
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: Vanguard Charitable Endowment Program · National Philanthropic Trust · 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 John S and Amy S Weinberg 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.
- Martha's Vineyard Community Foundation Inc — 34% of income from government
- The Yard Inc — 28% 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.
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Find your warmest path to John S and Amy S Weinberg 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.