Grants paid by The Mathenaeum Foundation
EIN 26-3372190 · Wilmington, DE · Form 990-PF, Part XV · NTEE T20
The Mathenaeum Foundation of Wilmington, DE (EIN 26-3372190) reported 44 grants paid totaling $1,727,205 to 25 recipients in tax years 2018–2024, on Form 990-PF, Part XV. Derived from IRS e-file data, dataset version 2026.09.0, built 2026-09-03.
Grants paid
$1,727,205
44 grants
Recipients
25
distinct organizations
Tax years
2018–2024
5 filings in the corpus
By tax year
| Tax year | Grants paid | Amount paid | Approved for future |
|---|---|---|---|
| 2018 | 2 | $106,767 | — |
| 2020 | 1 | $23,466 | — |
| 2022 | 11 | $309,301 | — |
| 2023 | 18 | $754,074 | — |
| 2024 | 12 | $533,597 | — |
Top recipients
The 25 recipients receiving the most from The Mathenaeum Foundation, by grants paid, out of 25 distinct recipients.
| Recipient | Match | Location | Grants | Total paid | Latest year |
|---|---|---|---|---|---|
| Seattle Universal Math Museum 84-2800368 | B | Seattle, WA | 8 | $357,975 | 2024 |
| Society for Science and the Public 53-0196483 | B | Washington, DC | 4 | $216,000 | 2024 |
| Mathsworlduk | U | Leeds | 4 | $197,140 | 2023 |
| Stony Brook Foundation Inc 11-6077945 | B | Stony Brook, NY | 2 | $140,000 | 2024 |
| Ronald Mcdonald House Charities New York Metro Inc | U | New Hyde Park, NY | 1 | $98,731 | 2023 |
| Math Cultural Center of Chicago 92-2783323 | C | Chicago, IL | 1 | $91,597 | 2024 |
| Prison Mathematics Project Inc 85-4162338 | B | Phoenix, AZ | 2 | $85,000 | 2023 |
| Center for Disaster Philanthropy Inc 45-5257937 | B | Washington, DC | 1 | $75,000 | 2023 |
| Every Org 61-1913297 | B | San Francisco, CA | 1 | $72,000 | 2024 |
| University of Southern California | U | Los Angeles, CA | 1 | $50,000 | 2023 |
| St Lawrence University | U | Canton, NY | 1 | $50,000 | 2024 |
| Impactstory 46-1599252 | B | Sanford, NC | 1 | $50,000 | 2023 |
| President & Fellows of Harvard College 04-2103580 | B | Cambridge, MA | 1 | $43,000 | 2023 |
| Girls Angle Inc 26-3252687 | B | Cambridge, MA | 3 | $41,010 | 2024 |
| Mathematical Association of America Incorporated | U | Washington, DC | 3 | $38,000 | 2024 |
| West Contra Costa Public Education Fund 68-0005307 | C | Pt Richmond, CA | 1 | $26,800 | 2018 |
| National Association of Mathematicians Incorporate 51-0183976 | C | Atlanta, GA | 1 | $15,000 | 2023 |
| Talkstem 81-0784576 | B | Dallas, TX | 1 | $15,000 | 2023 |
| Venice Heritage Foundation 39-2063873 | B | Venice, CA | 1 | $15,000 | 2023 |
| Ross Mathematics Foundation 83-1928343 | B | Columbus, OH | 1 | $14,641 | 2022 |
| National Organization of Gay and Lesbian Scientist 95-4358685 | C | Pasadena, CA | 1 | $10,000 | 2023 |
| Young Peoples Project Inc 64-0939004 | B | Cambridge, MA | 1 | $10,000 | 2023 |
| Art of Problem Solving Initiative Inc 20-1239616 | C | New York, NY | 1 | $6,561 | 2022 |
| Fannie and John Hertz Foundation 36-2411723 | B | Pleasanton, CA | 1 | $6,250 | 2022 |
| Old Westbury College Foundation Inc 11-2162880 | B | Old Westbury, NY | 1 | $2,500 | 2023 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Every grant
All 44 grant rows this organization reported, most recent first.
| Tax year | Recipient | Match | Amount | Type | Purpose | Source filing |
|---|---|---|---|---|---|---|
| 2024 | Stony Brook Foundation Inc Stony Brook, NY | B | $100,000 | paid | This grant is designated for Math for America, restricted to Math for America's Cohort Project program | 202503189349102805 |
| 2024 | Math Cultural Center of Chicago Chicago, IL | C | $91,597 | paid | General & Unrestricted | 202503189349102805 |
| 2024 | Every Org San Francisco, CA | B | $72,000 | paid | The Prison Math Project | 202503189349102805 |
| 2024 | Society for Science and the Public Washington, DC | B | $60,000 | paid | to support mathematics coverage in Science News, broadly along the lines of the Society for Science proposal to the Mathenaeum Foundation | 202503189349102805 |
| 2024 | St Lawrence University Canton, NY | U | $50,000 | paid | to support the Illustration Apprenticeships program of Illustration as a Mathematical Research Technique semester, with St. Lawrence University as Financial Administrator | 202503189349102805 |
| 2024 | Stony Brook Foundation Inc Stony Brook, NY | B | $40,000 | paid | This grant is designated for Math for America for the general support of Math for America | 202503189349102805 |
| 2024 | Seattle Universal Math Museum Seattle, WA | B | $30,000 | paid | to support the development and operation of in-house programs to serve the local community | 202503189349102805 |
| 2024 | Society for Science and the Public Washington, DC | B | $25,000 | paid | to support mathematics coverage in Science News | 202503189349102805 |
| 2024 | Seattle Universal Math Museum Seattle, WA | B | $25,000 | paid | Executive Director Employment Fund | 202503189349102805 |
| 2024 | Mathematical Association of America Incorporated Washington, DC | U | $15,000 | paid | anonymous support of Project NExT fellows | 202503189349102805 |
| 2024 | Girls Angle Inc Cambridge, MA | B | $15,000 | paid | General & Unrestricted | 202503189349102805 |
| 2024 | Seattle Universal Math Museum Seattle, WA | B | $10,000 | paid | General & Unrestricted | 202503189349102805 |
| 2023 | Seattle Universal Math Museum Mercer Island, WA | C | $222,500 | paid | Director's Compensation Fund, Studio Infinity programs, and general support | 202433169349102063 |
| 2023 | Ronald Mcdonald House Charities New York Metro Inc New Hyde Park, NY | U | $98,731 | paid | General & Unrestricted | 202433169349102063 |
| 2023 | Center for Disaster Philanthropy Inc Washington, DC | B | $75,000 | paid | Ukraine Humanitarian Crisis Recovery Fund | 202433169349102063 |
| 2023 | Prison Mathematics Project Inc Phoenix, AZ | B | $60,000 | paid | public and participant outreach and communication and general operating support | 202433169349102063 |
| 2023 | Impactstory Sanford, NC | B | $50,000 | paid | General & Unrestricted | 202433169349102063 |
| 2023 | University of Southern California Los Angeles, CA | U | $50,000 | paid | USC Math for America Los Angeles | 202433169349102063 |
| 2023 | President & Fellows of Harvard College Cambridge, MA | B | $43,000 | paid | Math Dept. Chair's Fund | 202433169349102063 |
| 2023 | Mathsworlduk Leeds | U | $31,868 | paid | Expenditure Responsibility Grant | 202433169349102063 |
| 2023 | Seattle Universal Math Museum Mercer Island, WA | C | $25,000 | paid | Executive Director Employment Fund | 202433169349102063 |
| 2023 | Talkstem Dallas, TX | B | $15,000 | paid | General & Unrestricted | 202433169349102063 |
| 2023 | National Association of Mathematicians Incorporate Atlanta, GA | C | $15,000 | paid | General & Unrestricted | 202433169349102063 |
| 2023 | Girls Angle Inc Cambridge, MA | B | $15,000 | paid | General & Unrestricted | 202433169349102063 |
| 2023 | Mathematical Association of America Incorporated Washington, DC | U | $15,000 | paid | anonymous sponsorship of Project NExT Fellows | 202433169349102063 |
| 2023 | Venice Heritage Foundation Venice, CA | B | $15,000 | paid | General & Unrestricted | 202433169349102063 |
| 2023 | Young Peoples Project Inc Cambridge, MA | B | $10,000 | paid | General & Unrestricted | 202433169349102063 |
| 2023 | National Organization of Gay and Lesbian Scientist Pasadena, CA | C | $10,000 | paid | Spectra, the association of LGBTQ+ mathematicians | 202433169349102063 |
| 2023 | Old Westbury College Foundation Inc Old Westbury, NY | B | $2,500 | paid | Institute for Creative Problem Solving | 202433169349102063 |
| 2023 | Seattle Universal Math Museum Mercer Island, WA | C | $475 | paid | General & Unrestricted | 202433169349102063 |
| 2022 | Society for Science and the Public Washington, DC | B | $116,000 | paid | Expand and enhance mathematics coverage in Science News for an eighteen-month period | 202323199349110002 |
| 2022 | Mathsworlduk Leeds | U | $61,839 | paid | Expenditure Responsibility Grant | 202323199349110002 |
| 2022 | Prison Mathematics Project Inc Phoenix, AZ | B | $25,000 | paid | Public and Participant Outreach and Communication | 202323199349110002 |
| 2022 | Seattle Universal Math Museum Mercer Island, WA | C | $25,000 | paid | The recruitment and hiring of SUMM's new Executive Director | 202323199349110002 |
| 2022 | Seattle Universal Math Museum Mercer Island, WA | C | $20,000 | paid | General & Unrestricted | 202323199349110002 |
| 2022 | Society for Science and the Public Washington, DC | B | $15,000 | paid | General & Unrestricted | 202323199349110002 |
| 2022 | Ross Mathematics Foundation Columbus, OH | B | $14,641 | paid | Ross Endowment Fund | 202323199349110002 |
| 2022 | Girls Angle Inc Cambridge, MA | B | $11,010 | paid | General & Unrestricted | 202323199349110002 |
| 2022 | Mathematical Association of America Incorporated Washington, DC | U | $8,000 | paid | Project NExT | 202323199349110002 |
| 2022 | Art of Problem Solving Initiative Inc New York, NY | C | $6,561 | paid | General & Unrestricted | 202323199349110002 |
| 2022 | Fannie and John Hertz Foundation Pleasanton, CA | B | $6,250 | paid | General & Unrestricted | 202323199349110002 |
| 2020 | Mathsworlduk Leeds | U | $23,466 | paid | Expenditure Responsibility Grant | 202143139349100024 |
| 2018 | Mathsworlduk Leeds | U | $79,967 | paid | Expenditure Responsibility Grant | 201931339349102643 |
| 2018 | West Contra Costa Public Education Fund Pt Richmond, CA | C | $26,800 | paid | Golden Gate STEM Fair | 201931339349102643 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Recipient matching for this dataset version has not yet completed its independent precision check. Tier A rows carry the EIN the filer reported; tiers B–D are the matcher's inference and should be read as leads until the check is published on the methodology page.
Source filings
Every figure above is traceable to one of these IRS e-file returns by its OBJECT_ID.
| Form | Tax year | Period end | Filed | Schema | IRS OBJECT_ID |
|---|---|---|---|---|---|
| 990PF | 2024 | 2024-12-31 | not stated | 2024v5.2 | 202503189349102805 |
| 990PF | 2023 | 2023-12-31 | not stated | 2023v5.1 | 202433169349102063 |
| 990PF | 2022 | 2022-12-31 | not stated | 2022v5.0 | 202323199349110002 |
| 990PF | 2020 | 2020-12-31 | not stated | 2020v4.1 | 202143139349100024 |
| 990PF | 2018 | 2018-12-31 | not stated | 2018v3.1 | 201931339349102643 |
Derived from IRS Form 990-PF e-file XML; recipient identities from the IRS Exempt Organizations Business Master File. Dataset version 2026.09.0, built 2026-09-03. The same rows as Parquet: manifest; as JSON: /api/funders/263372190.json.
The same organization elsewhere in the program: exempt status and filing health · federal awards · grant guidance · open opportunities.
This is informational only, derived from public data on the dates shown. It is not an eligibility determination, and not legal, tax, or accounting advice. Verify against the official source before relying on it.