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The Mathenaeum Foundation at a glance

· Private foundation

The Mathenaeum 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.

$534k
Granted FY2024still arriving
12
Grants FY2024still arriving
6
States reached
$100k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Education$912kArts & Culture$465kScience & Tech$427kHuman Services$184kPublic Safety & Disaster$75kOther$0
02FY2024 · 12 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • $10k–50k7 grants · $160k
  • $50k–250k5 grants · $374k
$40,000
Median grant
6
States reached
$10M
Total assets
Largest grants
RecipientAmount
STONY BROOK FOUNDATION INC$100,000
MATH CULTURAL CENTER OF CHICAGO$91,597
EVERY ORG$72,000
SOCIETY FOR SCIENCE AND THE PUBLIC$60,000
ST LAWRENCE UNIVERSITY$50,000
STONY BROOK FOUNDATION INC$40,000
SEATTLE UNIVERSAL MATH MUSEUM$30,000
SEATTLE UNIVERSAL MATH MUSEUM$25,000
SOCIETY FOR SCIENCE AND THE PUBLIC$25,000
GIRLS ANGLE INC$15,000
MATHEMATICAL ASSOCIATION OF AMERICA INCORPORATED$15,000
SEATTLE UNIVERSAL MATH MUSEUM$10,000
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.

US giving: 88% of grant dollars ($1.9M). The need read here covers only this US portion; the 12% that went abroad ($260k) is mapped below.

show:

Dollar for dollar, its grants (FY17–24) land where the poverty rate runs at 11%, against an area that typically sits at 9%. 48% of its dollars go to grantees based in above-average-need neighborhoods. Its grants spread fairly evenly across need levels.

area typical 9%PRISON MATHEMATICS PROJECT INC: $60k → 11%YOUNG PEOPLES PROJECT INC: $10k → 8%GOLDEN GATE STEM FAIR: $16k → 8%WEST CONTRA COSTA PUBLIC EDUCATION FUND: $27k → 9%FANNIE AND JOHN HERTZ FOUNDATION: $6k → 10%EVERY ORG: $72k → 10%UNIVERSITY OF SOUTHERN CALIFORNIA: $50k → 14%OLD WESTBURY COLLEGE FOUNDATION INC: $3k → 6%STONY BROOK FOUNDATION INC: $100k → 7%ST LAWRENCE UNIVERSITY: $50k → 18%TALKSTEM: $15k → 14%CENTER FOR DISASTER PHILANTHROPY INC: $75k → 14%IMPACTSTORY: $50k → 16%NATIONAL ASSOCIATION OF MATHEMATICIANS INCORPORATE: $15k → 13%ROSS MATHEMATICS FOUNDATION: $100k → 15%SEATTLE UNIVERSAL MATH MUSEUM: $30k → 9%MATH CULTURAL CENTER OF CHICAGO: $92k → 14%THE OEIS FOUNDATION INC: $125k → 8%PRISON MATHEMATICS PROJECT INC: $25k → 11%GIRLS ANGLE INC: $80k → 8%RONALD MCDONALD HOUSE CHARITIES NEW YORK METRO INC: $99k → 6%STONY BROOK FOUNDATION INC: $40k → 7%SOCIETY FOR SCIENCE AND THE PUBLIC: $116k → 14%ROSS MATHEMATICS FOUNDATION: $15k → 15%SEATTLE UNIVERSAL MATH MUSEUM: $25k → 9%GIRLS ANGLE INC: $15k → 8%SOCIETY FOR SCIENCE AND THE PUBLIC: $60k → 14%SEATTLE UNIVERSAL MATH MUSEUM: $10k → 9%GIRLS ANGLE INC: $15k → 8%SOCIETY FOR SCIENCE AND THE PUBLIC: $25k → 14%SEATTLE UNIVERSAL MATH MUSEUM: $223k → 9%GIRLS ANGLE INC: $11k → 8%MATHEMATICAL ASSOCIATION OF AMERICA INCORPORATED: $15k → 14%SEATTLE UNIVERSAL MATH MUSEUM: $25k → 9%GIRLS ANGLE INC: $10k → 8%SOCIETY FOR SCIENCE AND THE PUBLIC: $15k → 14%SEATTLE UNIVERSAL MATH MUSEUM: $25k → 9%GIRLS ANGLE INC: $8k → 8%MATHEMATICAL ASSOCIATION OF AMERICA INCORPORATED: $15k → 14%SEATTLE UNIVERSAL MATH MUSEUM: $20k → 9%PRESIDENT & FELLOWS OF HARVARD COLLEGE: $43k → 8%MATHEMATICAL ASSOCIATION OF AMERICA INCORPORATED: $8k → 14%SEATTLE UNIVERSAL MATH MUSEUM: $475 → 9%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

WA
IL
NY
MA
OH
NJ
CA
AZ
NC
DC
GA
TX

Beyond the US: 12% of all-years giving ($260k)

1 country, by the recipient’s country on the filing.

grant dollars sentlessmore
United Kingdom$260k · 5 grants
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. International giving is mapped by the recipient’s country from the same 990 filings; comparable need data isn’t available at that grain.
04

Where the work is directed

The same grants placed two ways: where each recipient sits, and where its stated purpose sends the money.

About 5% of The Mathenaeum Foundation’s grant dollars are earmarked for a different county than the recipient’s own address.

The Mathenaeum Foundationlessmore of its giving
Placed by recipient address · 16% directed abroad (not shown)
How this is measured
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the funder’s own 990 grant descriptions.
03Its grantees
repeat funding

Who it funds again

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

60%of every dollar goes to organizations it has funded before.
$1.2M · 8 repeat orgs$819k to everyone else

Grantees it renews have grown median revenue +136% since the first grant, against +20% for those funded once.

8 repeat relationships: 4 still active in FY2024, 4 since wound down; 4 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

8
13

Total granted

$1.2M
$466k

Median revenue growth · since first grant

+136%
+20%

Still filing today

63%
85%

New vs renewed · share of each year

In FY2024, 34% of grant dollars renewed an existing relationship; $354k went to new ones.

50%100%’17’18’19’20’21’22’23’24
RenewedFirst-time

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

’17’18’19’20’21’22’23’24
EducationArts & CultureScience & TechPhilanthropyPublic Safety & DisasterRecreation & SportsOther
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

  • SU
    SEATTLE UNIVERSAL MATH MUSEUM
    3× · 2022–2024 · $358k · revenue +534% · 51% of their budget
  • SF
    SOCIETY FOR SCIENCE & THE PUBLIC
    2× · 2022–2024 · $216k · revenue +250%
  • RM
    ROSS MATHEMATICS FOUNDATION
    2× · 2021–2022 · $115k · revenue +136% · 26% of their budget

Funded once

  • TO
    THE OEIS FOUNDATION INC
    one grant, 2021 · $125k · revenue -42% · 65% of their budget
  • RM
    Ronald McDonald House Charities New York Metro Inc
    one grant, 2023 · $99k · revenue +20%
  • CF
    CENTER FOR DISASTER PHILANTHROPY INCgraduated
    one grant, 2023 · $75k · revenue +40%
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
National Science and Technology Medals Foundation Inc

The nstmf's mission is to build inclusive stem communities across the united states. fundamental to these communities are the significant, inspirational connections we foster between the individuals who have received national recognition…

—
2
Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation

The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.

Science & Tech
3
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
4
New York Hall of Science

Nysci's mission is to nurture generations of passionate learners, critical thinkers, and active citizens through design make play - an approach to learning and engagement that is deeply rooted in research on stem learning and guides the…

Arts & Culture
5
Past Foundation

By partnering anthropology with science and technology, we invite the world to design, construct and engage in experiences that link learning to life. past works with schools, districts and states to help transform education in terms of…

Arts & Culture
6
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
7
Association for Computing Machinery Inc

We are an intl. scientific & educational org. dedicated to advancing art, science & technology.

Science & Tech
8
Girls in Stem
Human Services
9
Future Problem Solving Program International Inc

Future problem solving proudly celebrates more than 50 years of placing close to a million young people at the core of a dynamic, purposeful learning experience. each year k-12 students from around the world participate in a variety of…

—
10
The Graduate Center Foundation Inc

The graduate center foundation is committed to promoting and safe-guarding the success of the graduate center by raising funds and managing and investing donations for use by the graduate center. the board of trustees of the foundation…

—
11
University of Miami

See Form 990, Part I, Line 1, Description of Organization Mission.

Education
12
William Marsh Rice University

As a leading research university with a distinctive commitment to undergraduate education, Rice University aspires to path breaking research, unsurpassed teaching, and contributions to the betterment of our world. It seeks to fulfill this…

Education
How this is measured
The grantee most central to the portfolio’s shape is Seattle Universal Math Museum; the most unlike its peers is Every Org. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
05the 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 27 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.

5
Load-bearing (≥25% of a budget)
5
Early backer (in before they grew)
22/22
Grantees still filing
13/22
Grew since first funded

Where the money sits, by cause and then by grantee

STONY BROOK FOUNDATION INC: $140,000 · EducationSTONY BROOK FOUNDATION INCGIRLS ANGLE INC: $138,510 · EducationGIRLS ANGLE INCROSS MATHEMATICS FOUNDATION: $114,641 · EducationROSS MATHEMATICS FOUNDATIONImpactStory: $50,000 · EducationImpactStoryUNIVERSITY OF SOUTHERN CALIFORNIA: $50,000 · EducationUNIVERSITY OF SOUTHERN CALIFORN…ST LAWRENCE UNIVERSITY: $50,000 · EducationST LAWRENCE UNIVERSITYPresident and Fellows of Harvard College: $43,000 · EducationPresident and Fellows of Harvar…+1 more: $10,000 · EducationSEATTLE UNIVERSAL MATH MUSEUM: $357,975 · Arts & CultureSEATTLE UNIVERSAL MATH MUSEUMTHE OEIS FOUNDATION INC: $125,000 · Arts & CultureTHE OEIS FOUNDATION INCMATH CULTURAL CENTER OF CHICAGO: $91,597 · Arts & CultureMATH CULTURAL CENTER OF CHICAGO+1 more: $15,000 · Arts & CultureMATHSWORLDUK: $259,743 · OtherMATHSWORLDUKRonald McDonald House Charities New York Metro Inc: $98,731 · OtherRonald McDonald House Chariti…PRISON MATHEMATICS PROJECT INC: $85,000 · OtherPRISON MATHEMATICS PROJECT IN…MATHEMATICAL ASSOCIATION OF AMERICA INCORPORATED: $38,000 · OtherMATHEMATICAL ASSOCIATION OF A…West Contra Costa Public Education Fund: $26,800 · Other+5 more: $45,311 · Other+5 moreSOCIETY FOR SCIENCE & THE PUBLIC: $216,000 · Science & TechSOCIETY FOR …TALKSTEM: $15,000 · Science & TechTALKSTEMCENTER FOR DISASTER PHILANTHROPY INC: $75,000 · Public Safety & DisasterEVERY ORG: $72,000 · PhilanthropyGOLDEN GATE STEM FAIR: $16,384 · Recreation & Sports
Education$596,151Arts & Culture$589,572Other$553,585Science & Tech$231,000Public Safety & Disaster$75,000Philanthropy$72,000Recreation & Sports$16,384

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 budgetSEATTLE UNIVERSAL MATH MUSEUM: $357,975 over 3y, 51% of budgetSOCIETY FOR SCIENCE & THE PUBLIC: $216,000 over 2y, 0.5% of budgetSTONY BROOK FOUNDATION INC: $140,000 over 1y, 0.0% of budgetGIRLS ANGLE INC: $138,510 over 6y, 24% of budgetTHE OEIS FOUNDATION INC: $125,000 over 1y, 65% of budgetROSS MATHEMATICS FOUNDATION: $114,641 over 2y, 26% of budgetRonald McDonald House Charities New York Metro Inc: $98,731 over 1y, 0.7% of budgetMATH CULTURAL CENTER OF CHICAGO: $91,597 over 1y, 34% of budgetCENTER FOR DISASTER PHILANTHROPY INC: $75,000 over 1y, 0.2% of budgetEVERY ORG: $72,000 over 1y, 0.1% of budgetImpactStory: $50,000 over 1y, 2.2% of budgetUNIVERSITY OF SOUTHERN CALIFORNIA: $50,000 over 1y, 0.0% of budgetST LAWRENCE UNIVERSITY: $50,000 over 1y, 0.0% of budgetPresident and Fellows of Harvard College: $43,000 over 1y, 0.0% of budgetGOLDEN GATE STEM FAIR: $16,384 over 1y, 26% of budgetTALKSTEM: $15,000 over 1y, 9.5% of budgetVENICE HERITAGE FOUNDATION: $15,000 over 1y, 10% of budgetTHE ART OF PROBLEM SOLVING INITIATIVE INC: $11,561 over 2y, 0.1% of budgetTHE YOUNG PEOPLE'S PROJECT INC: $10,000 over 1y, 0.4% of budgetFANNIE AND JOHN HERTZ FOUNDATION: $6,250 over 1y, 0.0% of budgetOLD WESTBURY COLLEGE FOUNDATION INC: $2,500 over 1y, 0.7% 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.

Gates FoundationJewish Communal FundSilicon Valley Commun…Gs Donor Advised Phil…Morgan Stanley Global…The Blackbaud Giving …Vanguard Charitable E…National Philanthropi…American Online Givin…Paypal Charitable Giv…Fidelity Investments …Donor Advised Charita…
Gates FoundationWA12.9× affinity4 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Gates Foundation · Jewish Communal Fund · Silicon Valley Community Foundation · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Morgan Stanley Global Impact Funding Trust Inc · The Blackbaud Giving Fund · Vanguard Charitable Endowment Program · National Philanthropic Trust · American Online Giving Foundation Inc · Paypal Charitable Giving Fund · Fidelity Investments Charitable Gift Fund · Donor Advised Charitable Giving Inc

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 Mathenaeum Foundation funds: left to right is the share of its income from government, bottom to top the share from The Mathenaeum Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 20%5%19%42%75%funder's share of their income ↑0%23%45%68%90%share of the org’s income from government →median 39%
  • The Young People's Project Inc: 39% of income from government
  • President and Fellows of Harvard College: 7% of income from government
no gov moneyreceives it· size = income
2get no government money at all
6report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–90%
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.

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 27 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Mathenaeum’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