· Private foundation
The Jacob & Ruth Mazer Foundation Co Michael Mazer
Its FY2025 filing reports that it accepted unsolicited grant applications.
What you funded, over time
By grantee IRS cause code (NTEE).
A cause breakdown isn’t shown here: 60% of THE JACOB & RUTH MAZER FOUNDATION CO MICHAEL MAZER’s grantee dollars fall outside its nine largest cause areas, whether because the recipient carries no IRS cause code or because its cause sits in the long tail. A chart would be mostly one residual band and misrepresent the portfolio.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| PLANNED PARENTHOOD | $8,500 |
| ACLU FOUNDATION | $5,000 |
| CIVIC CANOPY | $5,000 |
| Individual grant recipient | $3,000 |
| OSBORNE ASSOCIATION | $2,800 |
| JEWISH COLORADO | $2,750 |
| CAMP KESEM | $1,500 |
| GREENWICH HOSPITAL FOUNDATION | $1,000 |
| FRIENDS OF CASCO BAY | $1,000 |
| ACLU OF MAINE | $1,000 |
| DENVER MUSEUM OF NATURE SCIENCE | $1,000 |
| MAINE FAMILY PLANNING | $700 |
| YARMOUTH CARES ABOUT NEIGHBORS | $700 |
| AMERICAN CIVIL LIBERTIES UNION OF C | $600 |
| FFRF | $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 (FY18–25, $8k) land where the poverty rate runs at 11%, against an area that typically sits at 11%. 80% 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.
29 repeat relationships — 13 still active in FY2025, 16 since wound down; 6 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, 85% of grant dollars renewed an existing relationship; $5k 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
AMERICAN CIVIL LIBERTIES UNION FOUNDATION INC4× · 2020–2025 · $20k · revenue +65%- TOTHE OSBORNE ASSOCIATION INC5× · 2018–2025 · $11k · revenue +70%
- GHGREENWICH HOSPITAL8× · 2017–2025 · $8k · revenue +48%
Funded once
- IGIndividual grant recipientone grant, 2017 · $1k
- AMARIZONA MUSICFEST INCgraduatedone grant, 2019 · $1k · revenue +225%
- GEGREENWICH EMERGENCY MEDICAL SERVICE INCone grant, 2021 · $750 · revenue +14%
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 bring quality public television programs and resources to communities throughout new jersey and its tri-state neighbors. its content, both on-air and online, aims to reflect the diverse
Wamc is chartered by the new york state board of regents to "furnish, prepare and present non-profit and non-commercial educational, instructional and cultural radio programs and also non-profit and non-commercial programs (wamc's mission…
National public radio, inc. ("npr") works collaboratively with member public radio station licensees ("member stations") to create a more informed public, one that is challenged and invigorated by a deeper understanding and appreciation of…
To provide exceptional healthcare services in a safe and trustfulenvironment through the expertise, commitment and compassion of ourfamily of caregivers.
The npr foundation ("foundation") is organized and operated exclusively for the benefit of its sole supported organization, national public radio, inc. ("npr inc."). the foundation supports npr inc. through various activities such as…
To effectively and efficiently mitigate risks to the reliability and security of the western interconnection's bulk power system.
To provide exceptional healthcare services in a safe and trustful environment through the expertise, committment, and compassion of our family of caregivers.
Connecticut public broadcasting, inc. will inform, educate and inspire the people of connecticut, connecting and empowering the people of ct through outstanding journalism, storytelling, education and experiences, to make our state a more…
Mjhs health system is a charitable not-for-profit established to support the activities of affiliated organizations. mjhs is built on the core values of compassion, dignity and respect, first established by the four brooklyn ladies in…
To provide exceptional healthcare services in a safe and trustfulenvironment through the expertise, commitment, and compassion ofour family of caregivers.
To provide exceptional healthcare services in a safe and trustfulenvironment through the expertise, commitment and compassion of ourfamily of caregivers.
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 Greenwich Emergency Medical Service Inc and the most unlike its peers is Ray of Hope Foundation 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 40 years old; the field is 16. You back the established end — and your money leans older still.
The field is 22% 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 13% 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.
27 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. 27 of the 52 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 JEWISHColorado ↗
- Who funds THE CIVIC CANOPY ↗
- Who funds UNITED WAY OF GREENWICH INC ↗
- Who funds AMERICAN CIVIL LIBERTIES UNION FOUNDATION INC ↗
- Who funds THE OSBORNE ASSOCIATION INC ↗
- Who funds GREENWICH HOSPITAL ↗
- Who funds WNET ↗
- Who funds Hospice of the Valley ↗
- Who funds SOUTHERN POVERTY LAW CENTER INC ↗
- Who funds Caramoor Center for Music & the Arts Inc ↗
- Who funds JBI INTERNATIONAL INC ↗
- Who funds NEW YORK PUBLIC RADIO ↗
- Who funds Camp Kesem National ↗
- Who funds YARMOUTHCAN ↗
- Who funds Round Hill Volunteer Fire and Rescue Department Inc ↗
- Who funds FRIENDS OF CASCO BAY ↗
- Who funds ROYAL RIVER CONSERVATION TRUST ↗
- Who funds ARIZONA MUSICFEST INC ↗
- Who funds GREENWICH EMERGENCY MEDICAL SERVICE INC ↗
- Who funds FAMILY PLANNING ASSOCIATION OF MAINE INC ↗
- Who funds PORT CHESTER-RYE-RYE BROOK EMERGENCY MEDICAL SERVICES INC ↗
- Who funds THE HEARD MUSEUM ↗
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: Maine Community Foundation Inc · 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 Jacob & Ruth Mazer Foundation Co Michael Mazer 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 or a single department — and drag the year to watch it move.
- Greenwich Hospital — 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 The Jacob & Ruth Mazer Foundation Co Michael Mazer?
Find your warmest path to The Jacob & Ruth Mazer Foundation Co Michael Mazer 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.