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DONALD E McMAHON FOUNDATION at a glance

· Public charity

DONALD E McMAHON FOUNDATION

Medical research and equipment purchases for other charitable organizations and educational scholarships

$108k
Granted FY2025still arriving
5
Grants FY2025still arriving
1
States reached
$35k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0197% classified

What it funded, over time

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

Health$295kRecreation & Sports$99kArts & Culture$84kHuman Services$62kPhilanthropy$41kPublic Safety & Disaster$35kAnimals$29kYouth Development$6kOther$0
02FY2025 · 5 grants

Where the money goes

Grants by size, and the largest recipients.

How this is measured
The 5 grants below total $85,946, the rows itemized in this filing. The $108,435 headline is the total grant expense on the return; the other $22,489 is giving the schedule does not break out (grants under the $5,000 itemization floor, grants to individuals, grants on other schedules). Every figure below describes the itemized rows only.

By grant size · FY2025

  • Under $10k1 grant · $8k
  • $10k–50k4 grants · $78k
$15,000
Median grant
1
States reached
$1.1M
Total assets
Largest grants
RecipientAmount
FAULK FOUNDATION$35,000
HOUSTON SPCA$16,500
BAYLOR COLLEGE OF MEDICINE$15,000
SALVATION ARMY$11,000
HOUSTON LIVESTOCK SHOW & RODE$8,446
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 15%, against an area that typically sits at 11%. 93% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%NATIONAL PHILANTHROPIC TRUST: $31k → 7%BRYAN MUSEUM: $53k → 14%SALVATION ARMY: $11k → 16%BRYAN MUESUM: $19k → 14%BAYLOR COLLEGE OF MEDICINE: $62k → 16%BRYAN MUSEUM: $17k → 14%BAYLOR COLLEGE OF MEDICINE: $60k → 16%BRYAN MUSEUM: $15k → 14%BAYLOR COLLEGE OF MEDICINE: $32k → 16%BAYLOR COLLEGE OF MEDICINE: $30k → 16%BAYLOR COLLEGE OF MEDICINE: $18k → 16%BAYLOR COLLEGE OF MEDICINE: $15k → 16%BAYLOR COLLEGE OF MEDICINE: $10k → 16%HOUSTON SPCA: $17k → 16%HOUSTON SPCA: $6k → 16%FAULK FOUNDATION: $35k → 16%FAULK FOUNDATION: $16k → 16%BIG BROTHERS BIG SISTERS: $6k → 16%CITIZENS FOR ANIMAL PROTECTIO: $7k → 16%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.

84%of every dollar goes to organizations it has funded before.
$534k · 7 repeat orgs$105k to everyone else

Grantees it renews have grown median revenue +83% since the first grant, against +8% for those funded once.

7 repeat relationships: 4 still active in FY2025, 3 since wound down; 1 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

7
5

Total granted

$534k
$94k

Median revenue growth · since first grant

+83%
+8%

Still filing today

100%
40%

New vs renewed · share of each year

In FY2025, 87% of grant dollars renewed an existing relationship; $11k 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
AnimalsPhilanthropyEducationRecreation & SportsHealthHuman ServicesOther
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

  • BC
    Baylor College of Medicine
    7× · 2017–2025 · $227k · revenue +67%
  • HOUSTON LIVESTOCK SHOW AND RODEO INC
    7× · 2017–2025 · $99k · revenue +84%
  • TC
    Texas Children's Hospital
    3× · 2018–2024 · $68k · revenue +83%

Funded once

  • BM
    BRYAN MUSEUM
    one grant, 2019 · $53k
  • IG
    Individual grant recipient
    one grant, 2018 · $19k
  • AE
    ARAB-AMERICAN EDUCATIONAL FOUNDATION INC
    one grant, 2019 · $10k · revenue -99%
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
The Museum of Fine Arts Houston

The museum of fine arts, houston serves as a welcoming and inclusive place for all people, connecting the communities of houston with diverse histories of art spanning 6,000 years and six continents. through our permanent collections,…

Arts & Culture
2
State Fair of Texas

The state fair of texas celebrates all things texan by promoting agriculture, education, and community involvement through quality entertainment in a family-friendly environment. the state fair of texas is a 501(c)(3) nonprofit…

Recreation & Sports
3
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
4
Texas Trust Gives
Philanthropy
5
Houston Zoo Inc

Mission: Connect communities with animals, inspiring action to save wildlife. Vision: Be a leader in the global movement to save wildlife. (Continued on Schedule O) Houston Zoo, Inc. (HZI) strives to be a zoo that practices exemplary…

Animals
6
Heb Tournament of Champions Charitable Trust
Philanthropy
7
Houston Geological Society Foundation
—
8
Baylor University Medical Center

Founded as a Christian ministry of healing, Baylor Scott & White Health (BSWH) promotes the well-being of all individuals, families and communities.

Health
9
Kimbell Art Foundation
Arts & Culture
10
Texas Bankers Foundation
Education
11
Texas Horse Racing Hall of Fame
Philanthropy
12
Houston Academy of Medicine

The mission of the Houston Academy of Medicine is to support the community service, education, scientific, and charitable programs for physicians, their patients, and the community at large in Harris County.

Education
How this is measured
The grantee most central to the portfolio’s shape is Texas Children's Hospital; the most unlike its peers is Arab-American Educational Foundation Inc. 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

10 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. 10 of the 14 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)
2
Early backer (in before they grew)
10/10
Grantees still filing
8/10
Grew since first funded

Where the money sits, by cause and then by grantee

Baylor College of Medicine: $227,404 · EducationBaylor College of MedicineHOUSTON LIVESTOCK SHOW AND RODEO INC: $99,270 · Recreation & SportsHOUSTON LIVESTOC…THE FAULK FOUNDATION: $50,500 · PhilanthropyTHE FAULK FOUND…NATIONAL PHILANTHROPIC TRUST: $31,000 · PhilanthropyNATIONAL PHILAN…ARAB-AMERICAN EDUCATIONAL FOUNDATION INC: $10,000 · PhilanthropyARAB-AMERICAN E…BRYAN MUSEUM: $52,500 · OtherBRYAN MUSEUMIndividual grant recipient: $19,000 · OtherIndividual gra…SALVATION ARMY: $11,000 · OtherSALVATION ARMYBIG BROTHERS BIG SISTERS: $6,006 · OtherBIG BROTHERS B…Texas Children's Hospital: $68,000 · HealthTexas Child…HOUSTON POLICE FOUNDATION: $35,000 · Human ServicesBRYAN EDUCATIONAL INSTITUTE: $31,550 · Arts & CultureHOUSTON SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS: $22,500 · AnimalsCitizens For Animal Protection Inc: $6,500 · Animals
Education$227,404Recreation & Sports$99,270Philanthropy$91,500Other$88,506Health$68,000Human Services$35,000Arts & Culture$31,550Animals$29,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetBaylor College of Medicine: $227,404 over 7y, 0.0% of budgetHOUSTON LIVESTOCK SHOW AND RODEO INC: $99,270 over 7y, 0.0% of budgetTexas Children's Hospital: $68,000 over 3y, 0.0% of budgetTHE FAULK FOUNDATION: $50,500 over 2y, 20% of budgetHOUSTON POLICE FOUNDATION: $35,000 over 2y, 0.8% of budgetBRYAN EDUCATIONAL INSTITUTE: $31,550 over 2y, 0.6% of budgetNATIONAL PHILANTHROPIC TRUST: $31,000 over 1y, 0.0% of budgetHOUSTON SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS: $22,500 over 2y, 0.0% of budgetARAB-AMERICAN EDUCATIONAL FOUNDATION INC: $10,000 over 1y, 1.0% of budgetCitizens For Animal Protection Inc: $6,500 over 1y, 0.1% 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.

Greater Houston Commu…Albert & Ethel Herzst…Natl Christian Charit…Donor Advised Charita…American Online Givin…Fidelity Investments …Amazonsmile Foundation
Greater Houston Community FoundationTX15× affinity5 shared granteesties to 6 of 6Hover any node to trace its alignments.Compare side by side →

Open a dossier: Greater Houston Community Foundation · Albert & Ethel Herzstein · Natl Christian Charitable Fdn Inc · Donor Advised Charitable Giving Inc · American Online Giving Foundation 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 DONALD E McMAHON FOUNDATION funds: left to right is the share of its income from government, bottom to top the share from DONALD E McMAHON FOUNDATION. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%2%6%14%25%funder's share of their income ↑0%5%10%15%20%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get no government money at all
    1report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–20%
    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 14 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 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

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    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