· Private foundation
The Martin & Barbara Zweig Foundation Inc
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 FY2017–2025.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| THE AMERICAN SOCIETY FOR THE PREVEN | $28,791 |
| Individual grant recipient | $27,500 |
| FEEDING AMERICA | $27,500 |
| WORLD CENTRAL KITCHEN INC | $27,500 |
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 (FY18–20, $38k) land where the poverty rate runs at 16%, against an area that typically sits at 11%. 93% 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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +80% since the first grant, against +37% for the ones you funded once.
8 repeat relationships — 0 still active in FY2025, 8 since wound down; 4 grantees were first funded in FY2025 (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 FY2025, 0% of grant dollars renewed an existing relationship; $111k 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
- FCFidelity Charitable Giving Account2× · 2019–2022 · $3.6M
- DFDWYER FAMILY FUND - BOA CHARITABLE3× · 2017–2019 · $325k
- IGIndividual grant recipient3× · 2017–2019 · $325k
Funded once
- MSMOUNT SINAI MEDICAL CENTERone grant, 2017 · $500k
- TMTHE MOUNT SINAI MEDICAL CENTERone grant, 2018 · $500k · revenue -163%
- ANAmerican National Red Cross & Its Constituent Chapters and Branchesgraduatedone grant, 2020 · $28k · revenue +38%
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.
Ocean conservancy unites science, people, and policy to protect our ocean, today and for generations to come.
To engage and catalyze global seafood supply chains in rebuilding depleted fish stocks and reducing the environmental impacts of fishing and fish farming.
Ci works to spotlight and secure the critical benefits that nature provides to humanity.
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.
Project drawdown's mission is to drive meaningful climate action by advancing science-based solutions and strategies. project drawdown's work is focused on three pillars: science - advancing science-based climate solutions and strategies;…
Wwf's mission is to conserve nature and reduce the most pressing threats to the diversity of life on earth. (continued on schedule o)
The climate institute is organized for the purpose of educating the general public and policy makers as to the gravity of potential climate change, exploring the policy implications of the latest scientific findings on climate modelling…
Conservation law foundation, inc. (clf) protects new england's environment for the benefit of all people and future generations. we use the law, science, and markets to create solutions that preserve and restore our natural resources,…
Founded in 1877, american humane association, dba american humane society (american humane) is committed to ensuring the safety, welfare and well-being of animals. our leadership programs are first to serve in promoting and nurturing the…
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 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.
Nyu is a private university with approximately 60,000 matriculating students in 20 schools and institutes. nyu's primary missions are education, research and scholarship, and patient care.
For reference, the grantee most central to the portfolio’s shape is Cradles to Crayons Inc and the most unlike its peers is City Lax Inc. 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 36 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) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 4% 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.
23 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. 23 of the 39 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 THE MOUNT SINAI MEDICAL CENTER ↗
- Who funds THE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS ↗
- Who funds HABITAT FOR HUMANITY INC ↗
- Who funds Feeding America ↗
- Who funds WORLD CENTRAL KITCHEN INC ↗
- Who funds American National Red Cross & Its Constituent Chapters and Branches ↗
- Who funds REDWOOD EMPIRE FOOD BANK ↗
- Who funds TREVOR PROJECT INC ↗
- Who funds THE EVERGLADES FOUNDATION INC ↗
- Who funds PUPPIES BEHIND BARS INC ↗
- Who funds MCCRAE JAMES WILLIAMS FOUNDATION INC ↗
- Who funds NORTH SHORE ANIMAL LEAGUE AMERICA INC ↗
- Who funds THE CENTER FOR PURSUIT ↗
- Who funds COLGATE UNIVERSITY ↗
- Who funds Baylor College of Medicine ↗
- Who funds THE FOUNDERS FUND INC ↗
- Who funds NANTUCKET LAND & WATER COUNCIL INC ↗
- Who funds FISHER ISLAND PHILANTHROPIC FUND INC ↗
- Who funds EVERYTOWN FOR GUN SAFETY SUPPORT FUND INC ↗
- Who funds CRADLES TO CRAYONS INC ↗
- Who funds HORIZONS FOR HOMELESS CHILDREN ↗
- Who funds CITY LAX INC ↗
- Who funds NATURAL RESOURCES DEFENSE COUNCIL 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: The Ayco Charitable Foundation · National Philanthropic Trust · Vanguard Charitable Endowment Program · 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 The Martin & Barbara Zweig 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.
- Horizons for Homeless Children — 21% of income from government
- Cradles to Crayons Inc — 2% 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 & Barbara Zweig Foundation Inc?
Find your warmest path to The Martin & Barbara Zweig 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.