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The William Marx Foundation at a glance

· Private foundation

The William Marx Foundation

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$13k
Granted FY2022
2
Grants FY2022
1
States reached
$10k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0194% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2022.

Health$588kCivil Rights$205kArts & Culture$60kHuman Services$58kAnimals$51kInternational$26kPhilanthropy$25kMembership Benefit$5kOther$0
02FY2022 · 2 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2022

  • Under $10k1 grant · $3k
  • $10k–50k1 grant · $10k
$10,000
Median grant
1
States reached
$0
Total assets
Largest grants
RecipientAmount
CHILDREN'S MUSEUM OF MANHATTAN$10,000
BOYS AND GIRLS CLUB OF MOUNT VERNON$2,500
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, $220k) land where the poverty rate runs at 13%, against an area that typically sits at 11%. 91% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%HOSPICE CARE NETWORK: $100k → 13%HOSPICE CARE NETWORK: $100k → 13%HANDS ON TZEDAKAH: $10k → 11%HANDS ON TZEDAKAH: $10k → 11%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.
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.

74%of every dollar goes to organizations it has funded before.
$770k · 11 repeat orgs$266k to everyone else

Grantees it renews have grown median revenue +78% since the first grant, against +10% for those funded once.

11 repeat relationships: 1 still active in FY2022, 10 since wound down; 1 grantees were first funded in FY2022 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

11
20

Total granted

$770k
$264k

Median revenue growth · since first grant

+78%
+10%

Still filing today

91%
50%

New vs renewed · share of each year

In FY2022, 80% of grant dollars renewed an existing relationship; $3k went to new ones.

50%100%’17’18’19’20’21’22
RenewedFirst-time

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

’17’18’19’20’21’22
HealthHuman ServicesAnimalsInternationalArts & CultureCivil RightsOther
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

  • HC
    HOSPICE CARE NETWORK
    2× · 2018–2019 · $200k · revenue +25%
  • AL
    ANTI-DEFAMATION LEAGUE
    2× · 2018–2019 · $200k · revenue +80%
  • BR
    Boca Raton Regional Hospital Inc
    2× · 2017–2019 · $75k · revenue +78%

Funded once

  • NL
    NYU LANGONE MEDICAL CENTER
    one grant, 2017 · $60k
  • NM
    NATIONAL MS SOCIETY
    one grant, 2019 · $60k
  • PC
    PAP CORPS
    one grant, 2017 · $25k
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
Federation of State Medical Boards of the United States Inc

The fsmb serves as the voice for state medical boards, supporting them through education, assessment, research and advocacy while providing services and initiatives that promote patient safety, quality health care and regulatory best…

Health
2
American Academy of Neurology

The Academy's mission is to enhance member career fulfillment and promote brain health for all.

Community Improvement
3
Long Island Jewish Medical Center

Long island jewish medical center is part of the northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and…

Health
4
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
5
United States Naval Institute

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.

—
6
Albert Einstein College of Medicine

Committed to exceptional healthcare quality for all and actively engaged with our community, einstein drives scientific discovery and educates compassionate leaders in health and science.

Education
7
American Academy of Dermatology Association Inc

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…

Health
8
International Life Sciences Institute

Ilsi is a global, nonprofit federation dedicated to generating and advancing emerging science and groundbreaking research to ensure foods are safe, nutritious and sustainable, and that they improve planetary and human health and well-being…

Science & Tech
9
Metropolitan Jewish Health System Inc

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…

Health
10
Lenox Hill Hospital

Lenox hill hospital is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future generations…

Health
11
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
12
Stony Brook Surgical Associates University Faculty Practice Corporation

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

Health
How this is measured
The grantee most central to the portfolio’s shape is Children's Museum of Manhattan; the most unlike its peers is Humane World for Animals Inc. 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

22 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. 22 of the 33 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)
3
Early backer (in before they grew)
22/22
Grantees still filing
17/22
Grew since first funded

Where the money sits, by cause and then by grantee

THE PAP CORPS CHAMPIONS FOR CANCER RESEARCH: $65,300 · OtherTHE PAP CORPS CHAMPIONS FOR CANCE…NYU LANGONE MEDICAL CENTER: $60,000 · OtherNYU LANGONE MEDICAL CENTERNATIONAL MS SOCIETY: $60,000 · OtherNATIONAL MS SOCIETYPAP CORPS: $25,055 · OtherPAP CORPSIndividual grant recipient: $25,000 · OtherIndividual grant recipientJEWISH FEDERATION OF SOUTH PALM BEACH COUNTY INC: $25,000 · OtherJEWISH FEDERATION OF SOUTH PALM B…+10 more: $52,875 · Other+10 moreHOSPICE CARE NETWORK: $200,000 · Human ServicesHOSPICE CARE NETWORKFOOTSTEPS INC: $30,000 · Human ServicesFOOTSTEPS INCHANDS ON TZEDAKAH INC: $20,000 · Human ServicesHANDS ON TZEDAKAH INC+1 more: $5,000 · Human ServicesANTI-DEFAMATION LEAGUE: $200,000 · Civil RightsANTI-DEFAMATION LEAGU…Boca Raton Regional Hospital Inc: $75,000 · HealthBoca Raton Regio…DIABETES RESEARCH INSTITUTE FOUNDATION INC: $55,000 · HealthDIABETES RESEARC…LYMPHOMA RESEARCH FOUNDATION: $14,945 · HealthLYMPHOMA RESEARC…PARKINSON'S FOUNDATION INC: $10,000 · HealthPARKINSON'S FOUN…+2 more: $1,250 · HealthCHILDREN'S MUSEUM OF MANHATTAN: $50,000 · Arts & CultureBOCA RATON MUSEUM OF ART: $10,000 · Arts & CultureTRI COUNTY HUMANE SOCIETY: $50,000 · Animals+1 more: $1,000 · AnimalsINTERNATIONAL ISRAEL ALLIES CAUCUS FOUNDATION INC: $25,000 · InternationalMEDECINS SANS FRONTIERES USA INC: $1,000 · International
Other$313,230Human Services$255,000Civil Rights$200,000Health$156,195Arts & Culture$60,000Animals$51,000International$26,000

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

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetHOSPICE CARE NETWORK: $200,000 over 2y, 0.2% of budgetANTI-DEFAMATION LEAGUE: $200,000 over 2y, 0.1% of budgetBoca Raton Regional Hospital Inc: $75,000 over 2y, 0.0% of budgetDIABETES RESEARCH INSTITUTE FOUNDATION INC: $55,000 over 4y, 0.2% of budgetCHILDREN'S MUSEUM OF MANHATTAN: $50,000 over 4y, 0.2% of budgetTRI COUNTY HUMANE SOCIETY: $50,000 over 2y, 0.5% of budgetFOOTSTEPS INC: $30,000 over 2y, 1.0% of budgetINTERNATIONAL ISRAEL ALLIES CAUCUS FOUNDATION INC: $25,000 over 1y, 2.4% of budgetJEWISH FEDERATION OF SOUTH PALM BEACH COUNTY INC: $25,000 over 1y, 0.1% of budgetHANDS ON TZEDAKAH INC: $20,000 over 2y, 0.9% of budgetLYMPHOMA RESEARCH FOUNDATION: $14,945 over 2y, 0.1% of budgetPARKINSON'S FOUNDATION INC: $10,000 over 2y, 0.0% of budgetBOCA RATON MUSEUM OF ART: $10,000 over 1y, 0.1% of budgetETHICAL CULTURE FIELDSTON SCHOOL: $5,000 over 1y, 0.0% of budgetAARP FOUNDATION: $5,000 over 1y, 0.0% of budgetSOUTHERN POVERTY LAW CENTER INC: $5,000 over 1y, 0.0% of budgetEASTER SEALS INC: $2,500 over 1y, 0.0% of budgetBOYS & GIRLS CLUB OF MOUNT VERNON INC: $2,500 over 1y, 0.2% of budgetMEDECINS SANS FRONTIERES USA INC: $1,000 over 1y, 0.0% of budgetALZHEIMER'S DISEASE & RELATED DISORDERS ASSOCIATION INC: $1,000 over 1y, 0.0% of budgetHumane World for Animals Inc: $1,000 over 1y, 0.0% of budgetMUSCULAR DYSTROPHY ASSOCIATION INC: $250 over 1y, 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.

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 set of overlaps that mostly run through this funder rather than between each other.

Fidelity Investments …
Fidelity Investments Charitable Gift FundMA6× affinity4 shared granteesties to 0 of 0Hover any node to trace its alignments.Compare side by side →

Open a dossier: Fidelity Investments Charitable Gift 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 The William Marx Foundation funds: left to right is the share of its income from government, bottom to top the share from The William Marx 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%13%25%38%50%share of the org’s income from government →
    no gov moneyreceives it· size = income
    4get no government money at all
    5report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–50%
    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 William Marx Foundation?

    Find your warmest path to The William Marx 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 33 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 2022, released 2022. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

    Possibly out of date. A more recent filing (FY2024) is on record and reports no grant expense, so the figures above are from FY2022, the most recent year this funder made grants.

    Source object · view filing

    Play a game based on William Marx’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