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Foundation Dossiers

Texas · Public charity

DONALD E McMAHON FOUNDATION

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

$108k
Granted FY2025(still arriving)
5
Itemized grants FY2025
2
Organizations funded FY2024
0%
First-time grantees FY2024
Read the full brief
Itemized, FY2025
$86k
The rest is grants the schedule does not break out
Median grant, FY2025
$15,000
Largest grant, FY2025
$35,000
Organizations funded a year
2 to 6
FY2018 to FY2024
States reached, FY2025
1
Total assets, FY2025
$1.1M

How open it is to new grantees

In FY2024, 0% of the organizations DONALD E McMAHON FOUNDATION funded were first-time grantees, receiving 0% of its grant dollars.

New vs renewed · share of each year

In FY2024, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

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

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

’18’19’20’21’22’23’24
PhilanthropyHealthHuman ServicesArts & CultureAnimalsOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving5$86k20%
FY20242$23k0%
FY20233$53k0%
FY20223$65k33%
FY20213$52k67%
FY20202$26k0%
FY20194$96k50%
FY20186$161k67%
97% 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

Top grantees

Largest recipients by total granted, FY2017 to FY2025, and the share of each one’s budget the grants supplied at peak.

GranteeTotal grantedYearsShare of their budget
Baylor College of Medicine$227,40470%
Houston Livestock Show and Rodeo Inc$99,27070%
Texas Children's Hospital$68,00030%
The Faulk Foundation$50,500220%
Houston Police Foundation$35,00021%
Bryan Educational Institute$31,55021%
Houston Society for the Prevention of Cruelty to Animals$22,50020%
Arab-American Educational Foundation Inc$10,00011%
Citizens For Animal Protection Inc$6,50010%

Plus 4 recipients with no EIN on record ($89k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget DONALD E McMAHON FOUNDATION supplied at peak.

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 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

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 9.

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.

Compare DONALD E McMAHON FOUNDATION with peer funders

About DONALD E McMAHON FOUNDATION

How much does DONALD E McMAHON FOUNDATION give?
DONALD E McMAHON FOUNDATION reported 5 itemized grants totaling $85,946, out of $108,435 in total grant expense reported on the return in its FY2025 IRS filing. It funded between 2 and 6 organizations a year over FY2018 to FY2024.
What does DONALD E McMAHON FOUNDATION fund?
By grant dollars over FY2017 to FY2025, its largest causes are Health (44%), Recreation & Sports (15%), Arts & Culture (13%).
Who are DONALD E McMAHON FOUNDATION's largest grantees?
By total granted over FY2017 to FY2025: Baylor College of Medicine ($227k), Houston Livestock Show and Rodeo Inc ($99k), Texas Children's Hospital ($68k).
Does DONALD E McMAHON FOUNDATION fund new organizations?
In FY2024, 0% of the organizations it funded were first-time grantees.
Which funders back the same organizations as DONALD E McMAHON FOUNDATION?
Its strongest co-funders, measured against what their size predicts, include Greater Houston Community Foundation, Albert & Ethel Herzstein, Natl Christian Charitable Fdn Inc.
Where is DONALD E McMAHON FOUNDATION based?
DONALD E McMAHON FOUNDATION is based in TX.

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

Play a game based on DONALD E McMAHON’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