· Public charity
DONALD E McMAHON FOUNDATION
Medical research and equipment purchases for other charitable organizations and educational scholarships
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
The 5 grants below total $85,946 — the rows itemised in this filing. The $108,435 headline is the total grant expense reported on the return, so the remaining $22,489 is giving the schedule does not break out: grants under the $5,000 itemisation floor, grants to individuals, and grants reported on other schedules. Every figure below describes the itemised rows only.
By grant size · FY2025
- Under $10k1 grant · $8k
- $10k–50k4 grants · $78k
| Recipient | Amount |
|---|---|
| FAULK FOUNDATION | $35,000 |
| HOUSTON SPCA | $16,500 |
| BAYLOR COLLEGE OF MEDICINE | $15,000 |
| SALVATION ARMY | $11,000 |
| HOUSTON LIVESTOCK SHOW & RODE | $8,446 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Dollar for dollar, your grants (FY17–25) land where the poverty rate runs at 15%, against an area that typically sits at 11%. 93% of your dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +67% since the first grant, against +8% for the ones you 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
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2025, 87% of grant dollars renewed an existing relationship; $11k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). 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
- BCBaylor College of Medicine7× · 2017–2025 · $227k · revenue +67%
HOUSTON LIVESTOCK SHOW AND RODEO INC7× · 2017–2025 · $99k · revenue +84%- TCTexas Children's Hospital3× · 2018–2024 · $68k · revenue +58%
Funded once
- BMBRYAN MUSEUMone grant, 2019 · $53k
- IGIndividual grant recipientone grant, 2018 · $19k
- AEARAB-AMERICAN EDUCATIONAL FOUNDATION INCone grant, 2019 · $10k · revenue -99%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
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,…
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…
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…
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…
Founded as a Christian ministry of healing, Baylor Scott & White Health (BSWH) promotes the well-being of all individuals, families and communities.
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.
For reference, the grantee most central to the portfolio’s shape is Texas Children's Hospital and 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.
10 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, 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; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds Baylor College of Medicine ↗
- Who funds HOUSTON LIVESTOCK SHOW AND RODEO INC ↗
- Who funds Texas Children's Hospital ↗
- Who funds THE FAULK FOUNDATION ↗
- Who funds HOUSTON POLICE FOUNDATION ↗
- Who funds BRYAN EDUCATIONAL INSTITUTE ↗
- Who funds NATIONAL PHILANTHROPIC TRUST ↗
- Who funds HOUSTON SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS ↗
- Who funds ARAB-AMERICAN EDUCATIONAL FOUNDATION INC ↗
- Who funds Citizens For Animal Protection Inc ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
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
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization DONALD E McMAHON FOUNDATION funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal or a single department — and drag the year to watch it move.
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 your grant caused the public funding. Coverage is precision-first — a floor, not 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 12–24 months.