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Clay Mathematics Institute Inc

Science & Technology Denver, CO EIN: 134025978 (IRS) Sign up to see website
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80
Integrity Assessment
Strong transparency
80/100 · methodology

About Clay Mathematics Institute Inc

Clay Mathematics Institute Inc is a science technology organization based in DENVER, United States. Annual revenue: $33.1 million. EIN: 134025978.

Headquarters
Denver, CO
Foundation type
Private operating foundation (other)
NTEE code
U34
IRS subsection
501(c)(03)
Ruling date
Size
large

Verified certifications

Confirmed against the issuing authority - not self-reported.

IRS Tax-Deductible since 1999

Focus areas & reach

· What they work on and where
Cause tags
SDG alignment The 17 UN Sustainable Development Goals (SDGs) are the global agenda for ending poverty, protecting the planet, and ensuring prosperity by 2030. We tag each charity to the goals its work advances.

How it stacks up against peers

· vs. 8 similar science & technology in United States
Integrity Assessment This charity: 80
Peer average: 90

Concerns

· None found
No red flags found
Screened for IRS revocation history, Open investigations, Governance scandals, Related-party deals, Excessive exec comp.

GiveRadar Analysis

Original analysis from GiveRadar's dataset of comparable organizations

Based on the records currently verified by GiveRadar, Clay Mathematics Institute Inc has a partial profile, cross-referenced across 5 independent sources including the IRS.

  • GiveRadar has cross-referenced this organization across 5 independent sources, led by the IRS - more than 98% of comparable charities. See the sources
  • GiveRadar holds 11 years of financial filings for this organization, the most recent for fiscal year 2025 - a deeper filing history than 95% of the 3,236 science & technology charities in the United States with filings on record. See the filings
  • GiveRadar holds a more complete profile for this organization than for 91% of the 7,611 science & technology charities in the United States it tracks, because GiveRadar has verified its financial disclosures and its registration. Most of those have little verified data on record yet. View this cohort
GiveRadar has verified
  • government registration
  • financial records (11 filed years)
  • disclosed leadership
  • a website
  • a contact email
  • third-party accreditation
Not yet verified by GiveRadar
  • a donation page
  • an owner-submitted profile claim

Analysis based on GiveRadar's benchmark dataset of 2026-07-03. It describes what GiveRadar has verified, not a judgment of the organization itself.

Common questions

· Auto-generated from filings + methodology

Clay Mathematics Institute Inc is a registered science & technology nonprofit based in Denver, CO, United States. It is registered with the Internal Revenue Service (IRS). Its EIN is 134025978. According to GiveRadar's records, it holds active tax-deductible status on the IRS Publication 78 list, which means donations are tax-deductible and the organization is in good standing with the IRS. GiveRadar's Integrity Assessment for the organization is 80/100, which reflects how much public information is available, not whether the charity is legitimate. The organization reports $8M in annual revenue. No red flags have been detected.

Clay Mathematics Institute Inc's EIN (Employer Identification Number) is 134025978. This is the organization's IRS tax identification number; you can use it to verify tax-exempt status and to look up its Form 990 filings with the IRS.

Clay Mathematics Institute Inc has a GiveRadar Integrity Assessment of 80/100. This score combines five components: Registration (20 pts), Financial Transparency (30 pts), Governance (20 pts), Contact Availability (10 pts), and Data Recency (20 pts), with negative adjustments for any red flags. A score of 80 ('Strong transparency') reflects well-documented governance, recent financials, named leadership, and working contact details. For comparison, the average integrity assessment for science & technology charities in United States is 90/100.

Clay Mathematics Institute Inc is located in Denver, CO, United States.

Based on official tax filings, Clay Mathematics Institute Inc has $8M in annual revenue. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.

Clay Mathematics Institute Inc is classified as a Science & Technology organization, registered in United States. It operates as a Private operating foundation (other). By size, it is categorized as a large organization. It has $8M in annual revenue.

No red flags have been detected for Clay Mathematics Institute Inc. GiveRadar automatically screens charities for concerning patterns including high executive compensation, low program spending, and missing financial filings. Based on available official data, no issues have been identified.

According to GiveRadar's records, Clay Mathematics Institute Inc holds active tax-deductible status on the IRS Publication 78 list, which means donations are tax-deductible and the organization is in good standing with the IRS. It is registered with the Internal Revenue Service (IRS). GiveRadar provides data for research and does not endorse any organization. A GiveRadar Integrity Assessment reflects how much public data is available, not whether an organization is safe to donate to, so it is always smart to do your own research before giving.

Clay Mathematics Institute Inc is a science technology organization based in DENVER, United States. Annual revenue: $33.1 million. EIN: 134025978. Clay Mathematics Institute Inc is classified as a science & technology organization registered in United States.

Among science & technology charities registered in United States: Its annual revenue of $8M is comparable to the peer average of $15M.

Yes, donations to Clay Mathematics Institute Inc are generally tax-deductible in the United States. Clay Mathematics Institute Inc is a 501(c)(3) tax-exempt organization. Its EIN is 134025978, which you can use for tax filing purposes. Donors can typically deduct contributions on their federal income tax return if they itemize deductions. Consult a tax professional for guidance specific to your situation.

Annual revenue
$1M-$10M
Source: IRS 990 (FY2025) why this matters
Unlock exact figures

Filing history

10 years on file from IRS 990 (FY2025): revenue, expenses, program spending, assets, and liabilities by fiscal year.

Years on record: FY2025, FY2023, FY2022, FY2021, FY2020, FY2019, FY2015, FY2014, FY2013, FY2012.
Financial details are free - with a GiveRadar account

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Taxes

Tax-deductibility for donors

Donations may be tax-deductible for residents of United States under local rules. Confirm with the charity directly.

Always confirm tax treatment with the charity directly or your tax advisor before donating.

Leadership

From FY2025 filing

AN
Andrew W•••••
Chief Admin Officer

Officers & trustees (1)

Source: Public filings

See full names, roles, and stories

1 officers and trustees on file - free with a GiveRadar account.

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Latest news

From global news sources

3 articles found

From news sources and the organization. Shown for transparency; news never affects the integrity score.

Activity timeline

Filings and press mentions, merged

Form filed
$8.1M revenue
FY2025
IRS 990
Form filed
$0.7M revenue
FY2023
IRS 990
Form filed
$2.6M revenue
FY2022
IRS 990
Form filed
$0.2M revenue
FY2021
IRS 990
Form filed
$0.4M revenue
FY2020
IRS 990
Form filed
$1.2M revenue
FY2019
IRS/ProPublica
Hilbert Walked so the Clay Mathematics Institute Could Run - Scientific American
Oct 2019
www.scientificamerican.com
Form filed
$4.6M revenue
FY2015
IRS/ProPublica
Form filed
$1.0M revenue
FY2014
IRS/ProPublica
Form filed
$9.3M revenue
FY2013
IRS/ProPublica
Form filed
$0.7M revenue
FY2012
IRS/ProPublica
Russian math genius may refuse $1M Millennium Prize from the Clay Mathematics Institute - Deseret News
Mar 2010
www.deseret.com
Resignations rock mathematics institute - Nature
Jan 2003
www.nature.com

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Cause areas in United States

How many charities work in each area, with this charity's area highlighted.

Human Services 322,679
Education 195,586
Arts & Culture 133,128
Advocacy & Civil Rights 128,026
Religion 114,636
Health 98,862
Community Development 56,086
Youth Development 53,450
Science & Technology this charity 7,612
See all cause areas in United States

Most common causes in United States

Causes charities work on most.

Community Development 235,146
Education 159,016
Religion 103,741
Arts & Culture 101,203
Human Rights 76,926
Health 65,250
Youth Development 47,775
Animal Welfare 32,425

Sources and verification

Registration and legal identity
Internal Revenue Service (IRS) - Tax Exempt Organization Search
Financial filings
IRS Form 990 filings - Fiscal year 2025 most recent on file.
Officers and trustees
Internal Revenue Service (IRS) - Tax Exempt Organization Search - 2 disclosed in the public registry.
News and media coverage
GDELT Project + Google News
Supplementary verification
ProPublica Nonprofit Explorer
Supplementary verification
Charity Navigator

Data freshness

Last updated
Jun 6, 2026
Registry checked
Jun 6, 2026
Profile completeness
75%

What we know and don't know

Exactly which public data we hold on this charity. Our score reflects transparency, not impact.

On record · 7
  • Financial data · FY2025 on record
  • Named leadership · 2 officers on file
  • Government registration · Registered with an official registry
  • Official website · On record
  • Headquarters address · On file
  • Direct contact · Email or phone published
  • Tax-deductibility · Verified
Not available · 4
  • Executive pay
    Top-officer pay not disclosed
  • Mission statement
    No self-published statement of purpose
  • Programs & activities
    No named programs listed by the charity
  • Founding date
    Year founded not on file

Methodology

GiveRadar builds each profile primarily from official government charity registries, supplemented where available by third-party nonprofit databases and news archives, and combines it into a single 0-100 integrity assessment. The exact sources for this charity are listed above. We don't take a cut of any donation, ever.

Read full methodology

Are you the owner or a board member?

If you represent this organization and want to correct or update its data, you can claim this listing to edit details yourself, or email [email protected] with the correct information. We review every request and respond within 30 days.

Quick facts about Clay Mathematics Institute Inc

What is Clay Mathematics Institute Inc?
Clay Mathematics Institute Inc is a science & technology private operating foundation (other) based in Denver, United States. Clay Mathematics Institute Inc is a science technology organization based in DENVER, United States. Annual revenue: $33.1 million. EIN: 134025978.
Who leads Clay Mathematics Institute Inc?
Andrew Walker serves as Chief Admin Officer.
Where is Clay Mathematics Institute Inc located?
Headquartered in Denver, CO, United States.
What is Clay Mathematics Institute Inc's annual budget?
Annual revenue for fiscal year 2025 is approximately $1M-$10M.
Is Clay Mathematics Institute Inc trustworthy?
Clay Mathematics Institute Inc has a GiveRadar Integrity Assessment of 80 out of 100 (Strong transparency). The score reflects public-data transparency: registration, financial disclosure, governance, contact details, and how recently data was refreshed. It does not measure program impact.
What is Clay Mathematics Institute Inc's registration number?
IRS EIN: 134025978.
What is Clay Mathematics Institute Inc's website?
http://claymath.org