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· Private foundation

Helen & William Mazer 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.

$975k
Granted FY2025still arriving
119
Grants FY2025still arriving
17
States reached
$55k
Largest
01What it funds
0187% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2025.

Environment$1.6MEducation$890kArts & Culture$284kPhilanthropy$218kHealth$185kEmployment$165kInternational$162kPublic Safety & Disaster$160kOther$0
02FY2025 · 119 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k91 grants · $238k
  • $10k–50k25 grants · $582k
  • $50k–250k3 grants · $155k
$2,500
Median grant
17
States reached
$17M
Total assets
Largest grants
RecipientAmount
Individual grant recipient$55,000
Individual grant recipient$50,000
BRANDEIS UNIVERSITY$50,000
CONSERVATION LAW FOUNDATION$48,000
ECOCITY BUILDERS$47,500
Individual grant recipient$45,000
ROCKEFELLER UNIVERSITY$40,000
SPRING STREET CLIMATE FUND$40,000
Individual grant recipient$35,500
NATURE CONSERVANCY$30,000
BREAKTHROUGH T1D$30,000
JESPY HOUSE$25,000
UBUNTU PATHWAYS$25,000
NHCAT$20,000
NJ CONSERVATION FUND$20,000
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its human-services grants (FY20–25, $272k) land where the poverty rate runs at 14%, against an area that typically sits at 10%. 72% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%EASTERN CONGO INITIATIVE: $2k → 11%MAKE THE ROAD STATES: $3k → 7%PATHWAYS INC: $1k → 13%MUFINDI ORPHANS: $3k → 15%MEANINGFUL LIFE CENTER: $2k → 12%JESPY HOUSE: $25k → 16%INTERNET ARCHIVE: $3k → 10%MAKE THE ROAD STATES: $2k → 7%PATHWAYS INC: $1k → 13%MUFINDI ORPHANS: $3k → 15%MEANINGFUL LIFE CENTER: $2k → 12%JESPY HOUSE: $2k → 16%CHELSEA COLLABORATIVE: $2k → 16%INTERNET ARCHIVE: $2k → 10%MAKE THE ROAD STATES: $2k → 7%MEANINGFUL LIFE CENTER: $2k → 12%JESPY HOUSE: $1k → 16%MEANINGFUL LIFE CENTER: $2k → 12%JESPY HOUSE: $750 → 16%MEANINGFUL LIFE CENTER: $2k → 12%PRIME COALITION: $50k → 8%NORTHEAST EARTH COALITION: $5k → 16%SUMMIT AREA YMCA: $10k → 10%NORTHEAST EARTH COALITION: $5k → 16%NORTHEAST EARTH COALITION: $5k → 16%SUMMIT YMCA: $2k → 10%NORTHEAST EARTH COALITION: $4k → 16%SOCIAL IMPACT PARTNERS: $5k → 9%SUMMIT YMCA: $2k → 10%NORTHEAST EARTH COALITION: $3k → 16%SUMMIT YMCA: $1k → 10%SUMMIT YMCA: $1k → 10%NORTHEAST EARTH COALITION: $3k → 16%DETENTION WATCH NETWORK: $3k → 14%CONNECTION FOR WOMEN AND FAMILY: $1k → 10%RIAN IMMIGRANT CENTER: $3k → 16%COVENANT HOUSE: $600 → 17%COVENANT HOUSE: $600 → 17%COVENANT HOUSE: $600 → 17%COVENANT HOUSE: $600 → 17%COVENANT HOUSE: $600 → 17%COVENANT HOUSE: $600 → 17%INNOCENCE PROJECT: $20k → 17%INNOCENCE PROJECT: $20k → 17%INNOCENCE PROJECT: $20k → 17%INNOCENCE PROJECT: $17k → 17%INNOCENCE PROJECT: $16k → 17%INNOCENCE PROJECT: $15k → 17%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

ME
VT
NH
MN
IL
WI
NY
MA
OR
WY
SD
IN
NJ
CT
CA
CO
MO
KY
VA
MD
KS
TN
NC
DC
TX
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

89%of every dollar goes to organizations it has funded before.
$4.5M · 124 repeat orgs$577k to everyone else

Grantees it renews have grown median revenue +17% since the first grant, against 0% for those funded once.

124 repeat relationships: 92 still active in FY2025, 32 since wound down; 25 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

124
70

Total granted

$4.5M
$418k

Median revenue growth · since first grant

+17%
0%

Still filing today

67%
44%

New vs renewed · share of each year

In FY2025, 82% of grant dollars renewed an existing relationship; $159k went to new ones.

50%100%’20’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’20’21’22’23’24’25
EnvironmentEducationHuman ServicesArts & CultureInternationalCommunity ImprovementOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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

  • CONSERVATION LAW FOUNDATION INC
    6× · 2020–2025 · $268k · revenue +75%
  • TR
    THE ROCKEFELLER UNIVERSITY
    6× · 2020–2025 · $230k · revenue +1%
  • THE TRUSTEES OF RESERVATIONS
    6× · 2020–2025 · $181k · revenue +29%

Funded once

  • IG
    Individual grant recipient
    one grant, 2024 · $50k
  • PC
    PRIME COALITION INCgraduated
    one grant, 2020 · $50k · revenue +57%
  • EB
    ECOCITY BUILDERS
    one grant, 2020 · $40k · revenue -60%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
Open Markets Institute

The open markets institute works to help people relearn how to use competition policy to build stronger democracies, more just and equitable societies, more innovative and sustainable economies, and a more secure and peaceful world.

Education
2
The Union of Concerned Scientists Inc

The union of concerned scientists puts rigorous, independent science into action, developing solutions and advocating for a healthy, safe, and just future.

International
3
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
4
Grist Magazine Inc

Grist is an independent, non profit media organization dedicated to reporting on climate change.

Environment
5
Massachusetts Institute of Technology

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.

Education
6
Public Media Nj Inc

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

Arts & Culture
7
University of New Haven

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…

Education
8
Environmental Investigation Agency

To establish and promote programs to protect the global climate, forests, wildlife and the natural environment, through research, advocacy, and investigation.

International
9
World Resources Institute

Wri is committed to creating change that improves people's lives and ensures the natural world can thrive. (see schedule o)wri's bold vision requires a formula for success we call "count it. change it. scale it.":- count it: our work is…

International
10
City Report Inc

CITY REPORT, INC. serves the people of New York through independent journalism that answers their information needs and holds the powerful to account.

Arts & Culture
11
National Opinion Research Center

See schedule onorc at the university of chicago conducts research and data science on critical societal issues to guide decision-making and the development of programs and public policy. our experts identify relationships and trends, and…

Social Science
12
Npr Foundation

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…

—
How this is measured
The grantee most central to the portfolio’s shape is Prime Coalition Inc; the most unlike its peers is Internet Archive. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

137 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 137 of the 225 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
23
Early backer (in before they grew)
136/137
Grantees still filing
81/137
Grew since first funded

Where the money sits, by cause and then by grantee

Individual grant recipient: $260,000 · OtherIndividual grant recipientECOCITY BUILDERS: $205,500 · OtherECOCITY BUILDERSIndividual grant recipient: $182,500 · OtherIndividual grant recipientIndividual grant recipient: $170,000 · OtherIndividual grant recipientIndividual grant recipient: $154,000 · OtherIndividual grant recipient+129 more: $1,895,711 · Other+129 moreCONSERVATION LAW FOUNDATION INC: $268,000 · EnvironmentCONSERVATION LAW FOUN…THE TRUSTEES OF RESERVATIONS: $181,000 · EnvironmentTHE TRUSTEES OF RESER…OPEN SPACE INSTITUTE INC: $140,000 · EnvironmentOPEN SPACE INSTITUTE …SPRING STREET CLIMATE FUND INC: $83,000 · EnvironmentSPRING STREET CLIMATE…EARTHJUSTICE: $70,000 · EnvironmentEARTHJUSTICEECOCITY BUILDERS: $40,000 · EnvironmentMass Central Rail Trail Alliance Inc: $40,000 · Environment+15 more: $213,500 · Environment+15 moreBRANDEIS UNIVERSITY: $252,000 · EducationBRANDEIS UNIVERS…THE ROCKEFELLER UNIVERSITY: $230,000 · EducationTHE ROCKEFELLER …UBUNTU PATHWAYS INC: $155,000 · EducationUBUNTU PATHWAYS …+15 more: $128,200 · Education+15 moreTHE INNOCENCE PROJECT INC: $108,000 · Human ServicesPRIME COALITION INC: $50,000 · Human ServicesJESPY HOUSE INC: $28,500 · Human ServicesNORTHEAST EARTH COALITION: $25,000 · Human ServicesSUMMIT AREA YOUNG MEN'S CHRISTIAN ASSOCIATION A NJ NONPROFIT CORPORATION: $15,000 · Human ServicesMEANINGFUL LIFE CENTER: $10,000 · Human Services+12 more: $37,700 · Human ServicesBOSTON CYCLISTS UNION INC: $159,500 · Public Safety & DisasterMDRC: $157,000 · EmploymentInternational Rescue Committee INC: $80,000 · InternationalMEDECINS SANS FRONTIERES USA INC: $30,000 · InternationalSEEDS OF PEACE INC: $24,000 · InternationalHURU INTERNATIONAL INC: $8,200 · InternationalPALESTINE CHILDREN'S RELIEF FUND: $6,850 · International+1 more: $2,000 · International
Other$2,867,711Environment$1,035,500Education$765,200Human Services$274,200Public Safety & Disaster$159,500Employment$157,000International$151,050

Showing the 200 largest grantees by grant value.

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetCONSERVATION LAW FOUNDATION INC: $268,000 over 6y, 0.3% of budgetBRANDEIS UNIVERSITY: $252,000 over 5y, 0.0% of budgetTHE ROCKEFELLER UNIVERSITY: $230,000 over 6y, 0.0% of budgetTHE TRUSTEES OF RESERVATIONS: $181,000 over 6y, 0.1% of budgetBOSTON CYCLISTS UNION INC: $159,500 over 5y, 13% of budgetMDRC: $157,000 over 5y, 0.1% of budgetUBUNTU PATHWAYS INC: $155,000 over 6y, 1.6% of budgetOPEN SPACE INSTITUTE INC: $140,000 over 6y, 1.5% of budgetTHE INNOCENCE PROJECT INC: $108,000 over 6y, 0.1% of budgetTHE NATURE CONSERVANCY: $90,000 over 3y, 0.0% of budgetSPRING STREET CLIMATE FUND INC: $83,000 over 2y, 2.5% of budgetInternational Rescue Committee INC: $80,000 over 6y, 0.0% of budgetEARTHJUSTICE: $70,000 over 6y, 0.0% of budgetMASSACHUSETTS BICYCLE COALITION INCORPORATED: $53,500 over 5y, 2.4% of budgetPRIME COALITION INC: $50,000 over 1y, 0.6% of budgetCONGREGATION ORGANIZED FOR A NEW CT: $43,000 over 3y, 3.0% of budgetECOCITY BUILDERS: $40,000 over 1y, 21% of budgetMass Central Rail Trail Alliance Inc: $40,000 over 3y, 14% of budgetTHE BARRED ROCK FUND INC: $35,000 over 2y, 3.5% of budgetTHE INSTITUTE OF CONTEMPORARY ART INC: $32,000 over 6y, 0.1% of budgetASSOCIATION OF NEW JERSEY ENVIRONMENTAL COMMISSIONS: $32,000 over 6y, 1.5% of budgetMALI HEALTH ORGANIZING PROJECT INC: $31,000 over 5y, 2.8% of budgetGATHER NEW HAVEN INC (FORMELY NEW HAVEN LAND TRUST INC): $31,000 over 6y, 1.4% of budgetBREAKTHROUGH T1D: $30,000 over 1y, 0.0% of budgetMEDECINS SANS FRONTIERES USA INC: $30,000 over 3y, 0.0% of budgetCLIFFORD BEERS COMMUNITY CARE CENTER INC: $30,000 over 6y, 0.0% of budgetJESPY HOUSE INC: $28,500 over 4y, 0.2% of budgetNORTHEAST WILDERNESS TRUST CORPORATION: $26,000 over 3y, 0.1% of budgetNORTHEAST EARTH COALITION: $25,000 over 5y, 1.1% of budgetAmerican Diabetes Association: $25,000 over 5y, 0.0% of budgetTHE TRUST FOR PUBLIC LAND: $25,000 over 1y, 0.0% of budgetSEEDS OF PEACE INC: $24,000 over 5y, 0.1% of budgetNEW YORK PUBLIC RADIO: $23,000 over 5y, 0.0% of budgetHACKENSACK RIVERKEEPER INC: $23,000 over 6y, 0.6% of budgetWALKBOSTON INC: $22,000 over 6y, 1.7% of budgetBENNINGTON COLLEGE CORPORATION: $20,000 over 1y, 0.0% of budgetTRUSTEES OF CLARK UNIVERSITY: $20,000 over 6y, 0.0% of budgetEAST COAST GREENWAY ALLIANCE INC: $20,000 over 1y, 1.9% of budgetNORTHEASTERN UNIVERSITY: $20,000 over 1y, 0.0% of budgetTHE FOUNDATION FIGHTING BLINDNESS INC: $18,500 over 6y, 0.0% of budgetSTUDENT LOAN FUND INC: $17,000 over 2y, 7.4% of budgetROUNDABOUT THEATRE COMPANY INC: $16,500 over 6y, 0.0% of budgetSUMMIT AREA YOUNG MEN'S CHRISTIAN ASSOCIATION A NJ NONPROFIT CORPORATION: $15,000 over 5y, 0.1% of budgetMONTCLAIR FILM FESTIVAL INC: $14,000 over 6y, 0.1% of budgetMONTCLAIR LOCAL NONPROFIT NEWS INC: $13,000 over 4y, 1.1% of budgetCOLD SPRING SCHOOL INC: $13,000 over 3y, 0.1% of budgetTRINITAS FOUNDATION: $12,000 over 6y, 0.1% of budgetTHE COMMONWEALTH CLUB - WORLD AFFAIRS OF CALIFORNIA: $11,000 over 5y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

  • Who funds CONSERVATION LAW FOUNDATION INC ↗
  • Who funds BRANDEIS UNIVERSITY ↗
  • Who funds THE ROCKEFELLER UNIVERSITY ↗
  • Who funds THE TRUSTEES OF RESERVATIONS ↗
  • Who funds BOSTON CYCLISTS UNION INC ↗
  • Who funds MDRC ↗
  • Who funds UBUNTU PATHWAYS INC ↗
  • Who funds OPEN SPACE INSTITUTE INC ↗
  • Who funds THE INNOCENCE PROJECT INC ↗
  • Who funds THE NATURE CONSERVANCY ↗
  • Who funds SPRING STREET CLIMATE FUND INC ↗
  • Who funds International Rescue Committee INC ↗
  • Who funds EARTHJUSTICE ↗
  • Who funds MASSACHUSETTS BICYCLE COALITION INCORPORATED ↗
  • Who funds PRIME COALITION INC ↗
  • Who funds CONGREGATION ORGANIZED FOR A NEW CT ↗
  • Who funds ECOCITY BUILDERS ↗
  • Who funds Mass Central Rail Trail Alliance Inc ↗
  • Who funds THE BARRED ROCK FUND INC ↗
  • Who funds THE INSTITUTE OF CONTEMPORARY ART INC ↗
  • Who funds ASSOCIATION OF NEW JERSEY ENVIRONMENTAL COMMISSIONS ↗
  • Who funds MALI HEALTH ORGANIZING PROJECT INC ↗

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

The Community Foundation for Greater New HavenCT25.5× affinity11 shared granteesties to 8 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Community Foundation for Greater New Haven · Investors Foundation Inc · The Hyde and Watson Foundation · Ej Grassmann Trust · Barr Foundation · S&P Global Foundation Fka the McGraw-Hill Research Foundation · Pseg Foundation Inc · Community Foundation of New Jersey · Eastern Bank Foundation · The Summit Foundation · Seedlings Foundation · William Caspar Graustein Memorial Fund

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Helen & William Mazer Foundation funds: left to right is the share of its income from government, bottom to top the share from Helen & William Mazer Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 290%2%6%14%25%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 4%
  • Essex National Heritage Commission Inc: 87% of income from government
  • Clifford Beers Community Care Center Inc: 75% of income from government
  • Forensic Justice Project: 71% of income from government
  • Emerge Connecticut Inc: 47% of income from government
  • Climatehaven Inc: 42% of income from government
  • La Colaborativa Inc: 34% of income from government
  • Eastie Farm Inc: 13% of income from government
  • Gather New Haven Inc (Formely New Haven Land Trust Inc): 11% of income from government
  • The Cambridge Historical Society: 11% of income from government
  • Brandeis University: 9% of income from government
  • Northeastern University: 7% of income from government
  • The Urban Farming Institute of Bostoninc: 4% of income from government
  • Girls On the Run Greater Boston: 4% of income from government
  • Third Sector New England Inc: 3% of income from government
  • Northeast Wilderness Trust Corporation: 2% of income from government
  • Montclair Film Festival Inc: 2% of income from government
  • Jespy House Inc: 2% of income from government
  • Trustees of Clark University: 2% of income from government
  • Wpkn Incorporated: 2% of income from government
  • The Trustees of Reservations: 2% of income from government
  • Bikes Not Bombs Inc: 2% of income from government
  • Greenroots Inc: 1% of income from government
  • The Institute of Contemporary Art Inc: 1% of income from government
  • Groton Hill Music Inc: 0% of income from government
  • Hackensack Riverkeeper Inc: 0% of income from government
  • Bennington College Corporation: 0% of income from government
no gov moneyreceives it· size = income
29get no government money at all
19report government grants on their 990 we could not trace to a source (not plotted)
3rely on government for over half their income
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Helen & William Mazer Foundation?

Find your warmest path to Helen & William Mazer 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.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 225 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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