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The Helen and Harold C Mayer Foundation at a glance

· Private foundation

The Helen and Harold C Mayer Foundation

Its FY2020 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$1.0M
Granted FY2020
3
Grants FY2020
1
States reached
$351k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0196% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2020.

Health$46kEducation$37kPhilanthropy$33kAnimals$18kArts & Culture$16kHuman Services$14kRecreation & Sports$13kReligion$10kOther$0
02FY2020 · 3 grants

Where the money goes

Grants by size, and the largest recipients.

$348,997
Median grant
1
States reached
$113k
Total assets
Largest grants
RecipientAmount
Individual grant recipient$350,844
Individual grant recipient$348,997
Individual grant recipient$342,263
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 (FY17–19, $10k) land where the poverty rate runs at 15%, against an area that typically sits at 11%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%PATHWAYS INC: $3k → 13%PATHWAYS INC: $2k → 13%PATHWAYS INC: $2k → 13%SAFE HORIZON: $1k → 17%SAFE HORIZON: $500 → 17%SAFE HORIZON: $500 → 17%COMMUNITY SERVICE SOCIETY: $2k → 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

NY
MA
PA
NJ
CT
CA
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.

14%of every dollar goes to organizations it has funded before.
$181k · 38 repeat orgs$1.1M to everyone else

Grantees it renews have grown median revenue +59% since the first grant, against +47% for those funded once.

38 repeat relationships: 0 still active in FY2020, 38 since wound down; 3 grantees were first funded in FY2020 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

38
20

Total granted

$181k
$23k

Median revenue growth · since first grant

+59%
+47%

Still filing today

74%
60%

New vs renewed · share of each year

In FY2020, 0% of grant dollars renewed an existing relationship; $1.0M went to new ones.

50%100%’17’18’19’20
RenewedFirst-time

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

’17’18’19’20
EducationHealthHuman ServicesEnvironmentArts & CultureAnimalsOther
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

  • TN
    The New York Public Library Astor Lenox and Tilden Foundations
    3× · 2017–2019 · $17k · revenue +76%
  • UJ
    UNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC
    3× · 2017–2019 · $11k · revenue +39%
  • CP
    CENTRAL PARK CONSERVANCY INC
    3× · 2017–2019 · $9k · revenue +76%

Funded once

  • AU
    ALS UNITED GREATER NEW YORK INC
    one grant, 2019 · $4k · revenue +6%
  • CS
    COMMUNITY SERVICE SOCIETY OF NEW YORKgraduated
    one grant, 2019 · $2k · revenue +75%
  • TN
    THE NEW YORK TIMES COMMUNITIES FUND
    one grant, 2019 · $2k · revenue +24%
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
New York University

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.

Education
2
New York Genome Center Inc

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.

Health
3
American Museum of Natural History

The museum's mission statement is: "to discover, interpret, and disseminate - through scientific research and education - knowledge about human cultures, the natural world, and the universe."

Arts & Culture
4
New York Botanical Garden

The new york botanical garden is a museum of plants and a scientific research center devoted to the study of plants and their uses. it is the garden's mission to improve public understanding of the natural world, horticulture, and the…

Environment
5
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
6
Neurology Associates of Stony Brook University Faculty Practice Corp

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
7
University Associates in Obstetrics and Gynecology University Faculty Pract ice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
8
Stony Brook Ophthalmology University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
9
Stony Brook Internists University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
10
Manhattanville University

To educate students to be ethical and socially responsible leaders in a global community.

Education
11
Stony Brook Urology University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
12
Cornell University

Education, research, medical services and other public services.

Education
How this is measured
The grantee most central to the portfolio’s shape is The New York Public Library Astor Lenox and Tilden Foundations; 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.
04the grantee network

40 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. 40 of the 61 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)
5
Early backer (in before they grew)
40/40
Grantees still filing
36/40
Grew since first funded

Where the money sits, by cause and then by grantee

Individual grant recipient: $350,844 · OtherIndividual grant recipientIndividual grant recipient: $348,997 · OtherIndividual grant recipientIndividual grant recipient: $342,263 · OtherIndividual grant recipient+36 more: $94,150 · Other+36 moreThe New York Public Library Astor Lenox and Tilden Foundations: $17,400 · EducationCHURCHILL SCHOOL AND CENTER: $9,000 · EducationRIVERDALE COUNTRY SCHOOL INC: $5,500 · Education+3 more: $3,000 · EducationTHE MOUNT SINAI HOSPITAL: $7,000 · HealthUNITED HOSPITAL FUND OF NEW YORK: $6,900 · HealthLenox Hill Hospital: $3,500 · HealthUSC VERDUGO HILLS HOSPITAL FOUNDATION: $2,000 · Health+1 more: $200 · HealthTHE ANIMAL MEDICAL CENTER: $5,400 · AnimalsWildlife Conservation Society: $5,400 · AnimalsTHE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS: $3,900 · AnimalsTHE PHILHARMONIC SYMPHONY SOCIETY OF NY INC: $6,900 · Arts & CultureFLORENCE GRISWOLD MUSEUM INC: $6,000 · Arts & CultureI-PARK FOUNDATION INC: $500 · Arts & Culture+1 more: $400 · Arts & CultureUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $11,400 · PhilanthropyTHE NEW YORK TIMES COMMUNITIES FUND: $2,000 · PhilanthropyCENTRAL PARK CONSERVANCY INC: $9,400 · Recreation & SportsHOLE IN THE WALL GANG FUND INC: $4,000 · Recreation & Sports
Other$1,136,254Education$34,900Health$19,600Animals$14,700Arts & Culture$13,800Philanthropy$13,400Recreation & Sports$13,400

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

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetThe New York Public Library Astor Lenox and Tilden Foundations: $17,400 over 3y, 0.0% of budgetUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $11,400 over 3y, 0.0% of budgetCENTRAL PARK CONSERVANCY INC: $9,400 over 3y, 0.0% of budgetCHURCHILL SCHOOL AND CENTER: $9,000 over 3y, 0.0% of budgetTHE MOUNT SINAI HOSPITAL: $7,000 over 3y, 0.0% of budgetTHE PHILHARMONIC SYMPHONY SOCIETY OF NY INC: $6,900 over 3y, 0.0% of budgetUNITED HOSPITAL FUND OF NEW YORK: $6,900 over 3y, 0.0% of budgetFLORENCE GRISWOLD MUSEUM INC: $6,000 over 3y, 0.1% of budgetPATHWAYS INC: $6,000 over 3y, 0.0% of budgetRIVERDALE COUNTRY SCHOOL INC: $5,500 over 3y, 0.0% of budgetTHE ANIMAL MEDICAL CENTER: $5,400 over 3y, 0.0% of budgetWildlife Conservation Society: $5,400 over 3y, 0.0% of budgetLIFT INC: $4,000 over 2y, 0.1% of budgetHOLE IN THE WALL GANG FUND INC: $4,000 over 3y, 0.0% of budgetALS UNITED GREATER NEW YORK INC: $4,000 over 1y, 0.1% of budgetTHE AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS: $3,900 over 3y, 0.0% of budgetCONNECTICUT AUDUBON SOCIETY INC: $3,500 over 3y, 0.0% of budgetLenox Hill Hospital: $3,500 over 3y, 0.0% of budgetNATURAL RESOURCES DEFENSE COUNCIL INC: $3,000 over 2y, 0.0% of budgetSEEDS OF PEACE INC: $2,000 over 2y, 0.0% of budgetUSC VERDUGO HILLS HOSPITAL FOUNDATION: $2,000 over 3y, 0.1% of budgetCOMMUNITY SERVICE SOCIETY OF NEW YORK: $2,000 over 1y, 0.0% of budgetVASSAR COLLEGE: $2,000 over 3y, 0.0% of budgetTHE NEW YORK TIMES COMMUNITIES FUND: $2,000 over 1y, 0.0% of budgetUNITED STATES FUND FOR UNICEF: $2,000 over 1y, 0.0% of budgetSANCTUARY FOR FAMILIES INC: $2,000 over 1y, 0.0% of budgetWORLD WILDLIFE FUND INC: $2,000 over 1y, 0.0% of budgetSAFE HORIZON INC: $2,000 over 3y, 0.0% of budgetMUSICAL MASTERWORKS INC: $1,500 over 3y, 0.2% of budgetTHE MAIN IDEA INC: $1,000 over 1y, 0.3% of budgetBARNARD COLLEGE: $1,000 over 3y, 0.0% of budgetTHE ROCKEFELLER UNIVERSITY: $1,000 over 1y, 0.0% of budgetDALTON SCHOOLS INC: $1,000 over 3y, 0.0% of budgetTHE TRUST FOR PUBLIC LAND: $1,000 over 1y, 0.0% of budgetI-PARK FOUNDATION INC: $500 over 1y, 0.1% of budgetARTTABLE INC: $500 over 1y, 0.1% of budgetHomemade Hope for Homeless Children: $500 over 1y, 0.2% of budgetTHE CHATHAM ORPHEUM THEATER INC: $400 over 3y, 0.0% of budgetTHE GLAUCOMA FOUNDATION INC: $200 over 3y, 0.0% of budgetFRIEND OF PLEASANT BAY INC: $150 over 3y, 0.1% 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.

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.

Morgan Stanley Global…National Philanthropi…Vanguard Charitable E…The Bank of America C…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
Morgan Stanley Global Impact Funding Trust IncIN10× affinity6 shared granteesties to 6 of 6Hover any node to trace its alignments.Compare side by side →

Open a dossier: Morgan Stanley Global Impact Funding Trust Inc · National Philanthropic Trust · Vanguard Charitable Endowment Program · The Bank of America Charitable Foundation Inc · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation

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 The Helen and Harold C Mayer Foundation funds: left to right is the share of its income from government, bottom to top the share from The Helen and Harold C Mayer Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 40%0%1%3%5%funder's share of their income ↑0%5%10%15%20%share of the org’s income from government →median 2%
  • I-Park Foundation Inc: 10% of income from government
  • Florence Griswold Museum Inc: 2% of income from government
  • Connecticut Audubon Society Inc: 1% of income from government
no gov moneyreceives it· size = income
4get no government money at all
8report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–20%
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 The Helen and Harold C Mayer Foundation?

Find your warmest path to The Helen and Harold C Mayer 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 61 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 2020, released 2020. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Helen and Harold C Mayer’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home