How much did The Mathenaeum Foundation grant in FY2024?

The Mathenaeum Foundation reported 12 grants totaling $533,597 in its FY2024 IRS filing.

Where is The Mathenaeum Foundation based?

The Mathenaeum Foundation is based in DE.

The Mathenaeum Foundation

Foundation Dossiers

· Private foundation

The Mathenaeum Foundation

This foundation does not accept unsolicited requests — it funds preselected organizations.

$534k

Granted FY2024

Grants

Communities

$100k

Largest

01What you fund

0172% classified

What you funded, over time

Every grant clustered by its grantee’s IRS cause code (NTEE), by year — across FY2017–2024.

Arts & Culture$590kEducation$546kScience & Tech$231kPublic Safety & Disaster$75kPhilanthropy$72kRecreation & Sports$16kOther$604k

02beneath the categories

Past the labels — and the year it shifted

Beneath the NTEE codes, this is what the grant descriptions actually say.

…and in their own words, year by year

2018

—

2019

—

2020

—

2021

endowment

2022

science

2023

mathematiciansmath

2024

illustrationmath mathmathematics coveragecoverage sciencescience news

Words distinctive to each year’s grant purposes (TF-IDF) · event-driven terms in cyan.

03FY2024 · 12 grants

Where the money goes

Your grants by size, and where they go.

By grant size · FY2024

$10k–50k7 grants · $160k
$50k–250k5 grants · $374k

$40,000

Median grant

States reached

$10M

Total assets

Largest grants

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

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.

show:

Dollar for dollar, your grants (FY17–24) land where the poverty rate runs at 11% — the area typically sits at 8%. 86% of your dollars reach neighborhoods with above-average need. Most of your grants land in higher-need ZIPs.

grant to an above-average-need area below average· circle size = grant amount

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; grantee ZIP can differ from where services are delivered.

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, United Way ALICE — shown as context about the area, never attributed to your giving.

03Your edge

repeat funding

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.

57%of every dollar goes to organizations you’ve funded before.

$1.2M · 8 repeat orgs$912k to everyone else

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

Total granted

$1.2M

$559k

Median revenue growth · since first grant

+205%

+220%

Still filing today

63%

80%

New vs renewed · share of each year

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

RenewedFirst-time

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

EducationArts & CultureScience & TechPhilanthropyPublic Safety & DisasterRecreation & SportsOther

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

SU
SEATTLE UNIVERSAL MATH MUSEUM
3× · 2022–2024 · $358k · revenue +1193% · 51% of their budget
SF
SOCIETY FOR SCIENCE AND THE PUBLIC
2× · 2022–2024 · $216k · revenue +353%
GA
GIRLS ANGLE INC
6× · 2017–2024 · $139k · revenue +11%

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 INCgraduated
one grant, 2023 · $99k · revenue +204%
CF
CENTER FOR DISASTER PHILANTHROPY INCgraduated
one grant, 2023 · $75k · revenue +455%

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

04Your field

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.

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

Girls in Stem

Human Services

Council of Graduate Schools

Dedicated to the improvement and advancement of graduate education.

Education

National Science and Technology

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…

—

New York Academy of Sciences

To advance scientific knowledge and to increase the number of scientifically informed individuals.

—

New York University

Nyu is a private university with approximately 60,000 matriculating students in 20 schools and institutes.

Education

Simons Laufer Mathematical Sciences

The mission of the simons laufer mathematical sciences institute (slmath) is to: foster and communicate mathematical research in a broad range of fundamental topics and applications, develop mathematical talent and cultivate a sense of…

Science & Tech

University of Massachusetts Foundation

The mission of the university of massachusetts foundation, inc. is to foster and promote the growth, progress and general welfare of the university of massachusetts as stated in the original 1950 articles of organization. the foundation…

Education

Howard Hughes Medical Institute

The howard hughes medical institute is a philanthropy that serves society through the direct conduct of biomedical research and support for programs in science education.

Health

Science Communication Lab Inc

The science communiation lab's mission is to convey, in the form of open- access free videos,the excitement of modern biology and the process by which scientific discoveries are made. the organization's aim is to introduce the leading…

Science & Tech

American Academy of Sciences

The American Academy of Sciences and Letters (AASL) promotes scholarship and honors outstanding achievement in the arts, sciences, and learned professions. It encourages the fruitful exchange of ideas within academia and society at large…

Education

Stanbridge University Foundation

Education

For reference, the grantee most central to the portfolio’s shape is The Art of Problem Solving Initiative and the most unlike its peers is President and Fellows of Harvard College. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.

Your grantees are a median of 17 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) — 10% of your grantees by number, and just 9% of your money.

Closures · last 5 years

The orgs you fund almost never close — 0.0% lost their exemption, against 11% of the field you don’t fund.

orgs you fund

0.0%0/22

the rest of the field

11%

206,164/1,819,543

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.

05the grantee network

21 grantees, every filing reconciled, 2017–2025.

Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue.

Load-bearing (≥25% of a budget)

Early backer (in before they grew)

21/21

Grantees still filing

20/21

Grew since you first funded

Where your money sits — by cause, then by grantee

Other$603,585Arts & Culture$589,572Education$546,151Science & Tech$231,000Public Safety & Disaster$75,000Philanthropy$72,000Recreation & Sports$16,384

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.

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.

Gs Donor Advised Philanthropy FundNY10.6× affinity5 shared granteesties to 9 of 9Hover any node to trace its alignments.Compare side by side →

Open a dossier: Gs Donor Advised Philanthropy Fund · Silicon Valley Community Foundation · Morgan Stanley Global Impact Funding Trust Inc · National Philanthropic Trust · The Blackbaud Giving Fund · Vanguard Charitable Endowment Program · American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund · Donor Advised Charitable Giving Inc · 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 organisation The Mathenaeum Foundation 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.

2024

’20’21’22’23’24

no gov moneyreceives it· size = income

2get no government money at all

0rely on government for over half their income

⤢ axis zoomed · 0–15%

typical government reliance, FY20–24

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. 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.

05Through Plinth

Through Plinth

Your grantmaking, live and operational

This dossier was generated cold from public filings. In Plinth it’s a working system — every applicant assessed and every grant monitored. Here’s a taste, run on one of your grantees: THE OEIS FOUNDATION INC.

Agentic due diligence · confidence × risk

Financial management

medium risk

~4 months of operating runway; revenue contracted over 5 filed years.

Track record & reputation

low risk

5 years of Form 990 filings, still active.

Legal standing

low risk

US 501(c)(3); EIN 300562250 on file with current IRS Form 990 filings.

Governance

Live in Plinth

Board composition & governance documents — verified live in Plinth from the applicant.

Compliance & sanctions

Live in Plinth

OFAC / UN sanctions screening — run live in Plinth at assessment.

Program capacity

Live in Plinth

Staffing, M&E and activity alignment — assessed live in Plinth from submitted proposals.

Live · Plinth’s real DD engine

Run the actual assessment on THE OEIS FOUNDATION INC, cold from public data.

Generated live from public IRS filings + open web sources by Plinth’s agentic engine. Shown as an illustration of the product, not a formal assessment.

Post-award monitoring · continuous checks

WatchFinancial stability— Roughly 4 months of cash on hand.
WatchSustained operations— Filing through 2025; revenue contracted over the period.
WatchReliance on your funding— Your grants peaked at 65% of their budget — load-bearing; a dependency Plinth would track.
Awaiting reportEvidence of delivery— Plinth collects the grantee's own monitoring reports post-award.

What you see here is static and public. In Plinth it’s operational — the full six-pillar framework on every applicant (with their own documents + live registry and sanctions checks), monitoring dashboards on every award, custom board reports, and eligibility routing for intake.

Agentic due diligenceMonitoring dashboardsCustom board reportsEligibility routing

Preview generated from this grantee’s public IRS filings and independent reporting. Pillars marked “live in Plinth” require the applicant’s submitted documents. Shown as illustration, not a formal assessment.

Warm introductions · Powered by PlinthPro

How do I get to The Mathenaeum Foundation?

Find your warmest path to The Mathenaeum Foundation through people who sit on both boards. Search for your organization and Plinth traces the introduction across shared trustees and officers.

Every link is a documented governance overlap in public IRS 990 filings — not a personal network — and each hop carries its own confidence tier. Low-confidence or distant paths are held back rather than guessed.

The Mathenaeum Foundation

What you funded, over time

Past the labels — and the year it shifted

Where the money goes

Do your dollars go where the need is?

Who you back again

Backed again, and grew

Funded once

21 grantees, every filing reconciled, 2017–2025.

Government reliance of your grantees

Your grantmaking, live and operational

How do I get to The Mathenaeum Foundation?

More from the funding graph

The Mathenaeum Foundation

What you funded, over time

Past the labels — and the year it shifted

Where the money goes

Do your dollars go where the need is?

Who you back again

Backed again, and grew

Funded once

21 grantees, every filing reconciled, 2017–2025.

Government reliance of your grantees

Your grantmaking, live and operational

How do I get to The Mathenaeum Foundation?

More from the funding graph