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Anthony & Delisa Mayer Foundation at a glance

· Private foundation

Anthony & Delisa Mayer Foundation

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$94k
Granted FY2025still arriving
5
Grants FY2025still arriving
3
States reached
$50k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0193% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Arts & Culture$1.5MEducation$1.1MPhilanthropy$50kRecreation & Sports$31kYouth Development$15kEnvironment$500Other$0
02FY2025 · 5 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k2 grants · $7k
  • $10k–50k2 grants · $37k
  • $50k–250k1 grant · $50k
$10,000
Median grant
3
States reached
$180k
Total assets
Largest grants
RecipientAmount
ST GEORGE'S SCHOOL$50,000
DENVER ART MUSEUM$27,000
DENISON UNIVERSITY$10,000
ROUNDUP RIDERS OF THE ROCKIES HERITAGE & TRAIL FOUNDATION INC$5,000
COLORADO PHOTOGRAPHIC ARTS CENTER$2,000
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.

show:

Dollar for dollar, its grants (FY17–25) land where the poverty rate runs at 10%, against an area that typically sits at 7%. 74% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 7%ST GEORGE'S SCHOOL: $50k → 7%Roundup Riders Heritage and Trails Foundation: $5k → 3%Kent Denver: $90k → 8%Graland Country Day School: $100k → 12%DENISON UNIVERSITY: $10k → 10%ST GEORGE'S SCHOOL: $50k → 7%ROUNDUP RIDERS OF THE ROCKIES HERITAGE & TRAIL FOUNDATION INC: $5k → 3%Kent Denver County Day School: $62k → 8%Graland Country Day School: $60k → 12%Denison University: $10k → 10%St George's School: $164k → 7%Roundup Riders Heritage and Trails Foundation: $5k → 3%Kent Denver School: $50k → 8%Wings over the Rockies: $759k → 12%Denison University: $10k → 10%St George's School: $103k → 7%Roundup Riders Heritage and Trails Foundation: $5k → 3%Kent Denver: $35k → 8%Wings over the Rockies: $352k → 12%DENISON UNIVERSITY: $10k → 10%St George's School: $95k → 7%ROUNDUP RIDERS OF THE ROCKIES HERITAGE & TRAIL FOUNDATION INC: $5k → 3%Kent Denver: $30k → 8%Wings over the Rockies: $150k → 12%Denison University: $6k → 10%St George's School: $80k → 7%Kent Denver School: $28k → 8%Wings over the Rockies: $5k → 12%St George's School: $75k → 7%Wings over the Rockies Air & Space Museum: $5k → 12%St George's School: $75k → 7%Big Brothers Big Sisters of Colorado: $5k → 8%Wings over the Rockies: $5k → 12%St George's School: $28k → 7%COLORADO SKIES ACADEMY: $25k → 8%Heritage & Trails Foundation Inc: $11k → 12%Heritage & Trails Foundation Inc: $10k → 12%The Denver Foundation: $50k → 12%Heritage & Trails Foundation Inc: $5k → 12%Chris Anthony Youth Initiative Project: $10k → 12%Denver Art Museum: $50k → 12%DENVER ART MUSEUM: $27k → 12%DENVER ART MUSEUM: $27k → 12%Denver Art Museum: $25k → 12%Denver Art Museum: $25k → 12%Denver Art Museum: $25k → 12%Denver Art Museum: $25k → 12%Colorado Photographic Arts Center Inc: $5k → 12%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.

99%of every dollar goes to organizations it has funded before.
$2.8M · 12 repeat orgs$41k to everyone else

Grantees it renews have grown median revenue +39% since the first grant, against -26% for those funded once.

12 repeat relationships: 5 still active in FY2025, 7 since wound down.

How the two cohorts compare

Re-uppedFunded once

Organizations

12
4

Total granted

$2.8M
$41k

Median revenue growth · since first grant

+39%
-26%

Still filing today

75%
75%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25
EducationArts & CultureRecreation & SportsYouth DevelopmentEnvironmentOther
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

  • WO
    WINGS OVER THE ROCKIES AIR & SPACE MUSEUM
    6× · 2017–2023 · $1.3M · revenue +8%
  • SG
    ST GEORGE'S SCHOOL
    9× · 2017–2025 · $720k · revenue +33%
  • DA
    DENVER ART MUSEUM
    7× · 2017–2025 · $204k · revenue +7%

Funded once

  • CS
    COLORADO SKIES ACADEMYgraduated
    one grant, 2024 · $25k · revenue +43%
  • CA
    Chris Anthony Youth Initiative Project
    one grant, 2020 · $10k
  • BB
    BIG BROTHERS BIG SISTERS OF COLORADO INC
    one grant, 2020 · $5k · revenue -26%
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
Colorado Academy

Creating curious, kind, courageous, and adventurous learners and leaders.

Education
2
Fountain Valley School of Colorado

Fountain valley school of colorado provides a transformative curriculum in a supportive environment where students are challenged to think critically, become leaders, and live by our core values: courage, compassion, curiosity,…

Education
3
The Colorado College

At colorado college our goal is to provide the finest liberal arts education in the country. drawing upon the adventurous spirit of the rocky mountain west, we challenge students, one course at a time, to develop those habits of intellect…

Education
4
The Peak School

The peak school seeks to ignite a passion for learning, to develop students of diverse talents and backgrounds who think critically and act with integrity, and to graduate compassionate, confident, capable students who will embrace their…

Education
5
Aia Colorado

AIA Colorado,is the voice of the architecture profession in Colorado. Through advocacy, leadership development, education and resources for architects, the organization supports architecture professionals in designing a better world where…

—
6
Alexander Dawson Foundation

The mission of the alexander dawson foundation is to establish, operate and maintain an educational organization that will provide students with the highest quality education, nurture future leaders, prepare young adults to excel in…

Education
7
University Corporation for Atmospheric Research

See schedule ouniversity corporation for atmospheric research (ucar), on behalf of, and in cooperation with its member university members, is engaged in the management of long-term atmospheric and related research and educational…

Science & Tech
8
Institute for Shipboard Education

Journeys of discovery that spark bold solutions to global challenges.

Education
9
Colorado Rocky Mountain School Inc

Colorado rocky mountain school, inc. is a co-educational, college- preparatory boarding and day school for students in grades 9 through 12.

Education
10
University of Denver

The university of denver (du) is a higher educational institution, providing both undergraduate and graduate degrees - the mission of the university of denver is to promote learning by engaging with students (continued on schedule o)in…

Education
11
Mountain Middle School

Mountain middle school (mms or the school), a colorado non-profit corporation, was created in 2009 pursuant to the colorado charter schools act to form and operate a charter school located in durango, colorado. mms inspires students to own…

Education
12
Explorer West an Independent Middle School

We empower young people to explore and grow their unique intellectual, ethical, and creative capabilities, and to treasure diversity and growth in others.

Education
How this is measured
The grantee most central to the portfolio’s shape is Kent Denver Country Day School; the most unlike its peers is Upper Colorado River Alliance. 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

13 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. 13 of the 17 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)
1
Early backer (in before they grew)
13/13
Grantees still filing
10/13
Grew since first funded

Where the money sits, by cause and then by grantee

WINGS OVER THE ROCKIES AIR & SPACE MUSEUM: $1,276,000 · Arts & CultureWINGS OVER THE ROCKIES AIR & SPACE MUSEUMDENVER ART MUSEUM: $204,000 · Arts & CultureDENVER ART MUSEUMST GEORGE'S SCHOOL: $719,877 · EducationST GEORGE'S SCHOOLGRALAND COUNTRY DAY SCHOOL: $160,000 · EducationGRALAND COUNTRY DAY SCHOOLKENT DENVER COUNTRY DAY SCHOOL: $139,500 · EducationKENT DENVER COUNTRY DAY SCHOOLDENISON UNIVERSITY: $52,000 · Education+1 more: $25,000 · EducationIndividual grant recipient: $158,000 · OtherHeritage & Trails Foundation Inc: $26,250 · OtherRoundup Riders Heritage and Trails Foundation: $15,000 · OtherChris Anthony Youth Initiative Project: $10,000 · OtherROUNDUP RIDERS OF THE ROCKIES HERITAGE AND TRAILS FOUNDATION: $10,000 · OtherCOLORADO PHOTOGRAPHIC ARTS CENTER INC: $8,000 · OtherTHE DENVER FOUNDATION: $50,000 · PhilanthropyTHE WESTERN STOCK SHOW ASSOCIATION: $6,000 · Recreation & SportsBIG BROTHERS BIG SISTERS OF COLORADO INC: $5,000 · Youth DevelopmentUPPER COLORADO RIVER ALLIANCE: $500 · Environment
Arts & Culture$1,480,000Education$1,096,377Other$227,250Philanthropy$50,000Recreation & Sports$6,000Youth Development$5,000Environment$500

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 budgetWINGS OVER THE ROCKIES AIR & SPACE MUSEUM: $1,276,000 over 6y, 19% of budgetST GEORGE'S SCHOOL: $719,877 over 9y, 0.2% of budgetDENVER ART MUSEUM: $204,000 over 7y, 0.1% of budgetGRALAND COUNTRY DAY SCHOOL: $160,000 over 2y, 0.5% of budgetKENT DENVER COUNTRY DAY SCHOOL: $139,500 over 3y, 0.2% of budgetDENISON UNIVERSITY: $52,000 over 7y, 0.0% of budgetTHE DENVER FOUNDATION: $50,000 over 1y, 0.0% of budgetCOLORADO SKIES ACADEMY: $25,000 over 1y, 1.2% of budgetROUNDUP RIDERS OF THE ROCKIES HERITAGE AND TRAILS FOUNDATION: $10,000 over 2y, 1.6% of budgetCOLORADO PHOTOGRAPHIC ARTS CENTER INC: $8,000 over 3y, 0.9% of budgetTHE WESTERN STOCK SHOW ASSOCIATION: $6,000 over 3y, 0.0% of budgetBIG BROTHERS BIG SISTERS OF COLORADO INC: $5,000 over 1y, 0.1% of budgetUPPER COLORADO RIVER ALLIANCE: $500 over 1y, 1.1% 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.

The Denver FoundationColorado Gives Founda…Rose Community Founda…Vanguard Charitable E…National Philanthropi…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
The Denver FoundationCO17.2× affinity6 shared granteesties to 7 of 7Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Denver Foundation · Colorado Gives Foundation · Rose Community Foundation · Vanguard Charitable Endowment Program · National Philanthropic Trust · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation

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 Anthony & Delisa Mayer Foundation funds: left to right is the share of its income from government, bottom to top the share from Anthony & Delisa Mayer Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%0%1%3%5%funder's share of their income ↑0%19%38%56%75%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get 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 · 0–75%
    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 Anthony & Delisa Mayer Foundation?

    Find your warmest path to Anthony & Delisa Mayer 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 17 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

    Source object · view filing

    Play a game based on Anthony & Delisa Mayer’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