· Private foundation
The McMahon Foundation
Its FY2025 filing reports that it accepted unsolicited grant applications.
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.
| Recipient | Amount |
|---|---|
| SWFL CHILDREN'S CHARITIES INC | $15,000 |
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.
Your human-services grants (FY18–23, $22k) land where the poverty rate runs at 12%, against an area that typically sits at 12%. 27% of those dollars go to grantees based in above-average-need neighborhoods. Your grants skew toward lower-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.
Which US states your grants reach
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 +160% since the first grant, against +52% for the ones you funded once.
4 repeat relationships — 0 still active in FY2025, 4 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, 0% of grant dollars renewed an existing relationship; $15k 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
- GNGREATER NAPLES AAUW CHARITABLE FOUNDATION INC2× · 2020–2021 · $54k · revenue +160% · 45% of their budget
- NZNAPLES ZOO INC2× · 2021–2023 · $15k · revenue +37%
THE SHELTER FOR ABUSED WOMEN & CHILDREN INC2× · 2021–2023 · $6k · revenue +2%
Funded once
- NCNAPLES CHILDREN FOUNDATION INCgraduatedone grant, 2023 · $20k · revenue +52%
GULFSHORE PLAYHOUSE INCgraduatedone grant, 2023 · $10k · revenue +90%- BBBIG BROTHERS BIG SISTERSone grant, 2023 · $6k
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.
Pediatric specialty group, inc. (d/b/a nicklaus children's pediatric specialists ("ncps")) is a physician-directed, multi-specialty pediatric group with a regional, national, and international presence in providing pediatric-centric care…
Suncoast hospice institute is now inactive.
See schedule o:asco is a professional oncology society committed to conquering cancer through research, education, and promotion of the highest quality patient care.
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…
Mission: johns hopkins all children's hospital (all children's), a member of johns hopkins medicine, strives to provide the highest quality care to improve the health of our entire community through innovation, collaboration, service…
Suncoast hospice's mission is to be the center to improve life for those touched by advanced illness, death, dying, grief, bereavement and other end-of-life issues.
The NCHRI directly supports the NICKLAUS CHILDREN'S HOSPITAL ("NCH") mission to provide hope through advanced care for our children and families. (CONTINUED ON SCHEDULE O)
The mission of MIAMI CHILDREN'S HEALTH SYSTEM FOUNDATION (D/B/A NICKLAUS CHILDREN'S HOSPITAL FOUNDATION, INC. )is to create awareness and generate funds for Nicklaus Children's Health System (System), Nicklaus Children's Hospital and any…
Nami palm beach county provides advocacy, education, support, and public awareness so that all individuals and families affected by mental illness can build better lives.
UF Health's mission is to promote health through outstanding and high-quality patient care, innovative and rigorous education in the health professions and biomedical sciences, and high-impact research across the spectrum of basic,…
Provider of pediatric healthcare, education, research & community service
For reference, the grantee most central to the portfolio’s shape is The Shelter for Abused Women & Children Inc and the most unlike its peers is University of Notre Dame du Lac. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
Your grantees are a median of 24 years old; the field is 12. You back the established end — and your money leans older still.
The field is 27% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 17% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
21 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. 21 of the 28 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 GREATER NAPLES AAUW CHARITABLE FOUNDATION INC ↗
- Who funds NAPLES CHILDREN FOUNDATION INC ↗
- Who funds NAPLES ZOO INC ↗
- Who funds SWFL CHILDREN'S CHARITIES INC SOUTHWEST FLORIDA WINE & FOOD FEST ↗
- Who funds GULFSHORE PLAYHOUSE INC ↗
- Who funds THE SHELTER FOR ABUSED WOMEN & CHILDREN INC ↗
- Who funds MISERICORDIA HOME ↗
- Who funds OCONEE PERFORMING ARTS SOCIETY INC ↗
- Who funds University of Notre Dame du Lac ↗
- Who funds YOUTH HAVEN INC ↗
- Who funds MANSFIELD CARES INC ↗
- Who funds BLOOD CANCER UNITED INC ↗
- Who funds DOUBLE H HOLE IN THE WOODS RANCH INC ↗
- Who funds AUTISM SPEAKS INC ↗
- Who funds GOLISANO CHILDREN'S MUSEUM OF NAPLES INC ↗
- Who funds ST MATTHEWS HOUSE INC ↗
- Who funds Hope Rising dba Hope Rising Ministries ↗
- Who funds NEW HORIZONS OF SOUTHWEST FLORIDA INC ↗
- Who funds AMERICAN CANCER SOCIETY INC ↗
- Who funds THE IMMOKALEE FOUNDATION INC ↗
- Who funds THE RED SOX FOUNDATION 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: National Philanthropic Trust · Vanguard Charitable Endowment Program · Fidelity Investments Charitable Gift Fund · Donor Advised Charitable Giving Inc · 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 The 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, a single department, or state — and drag the year to watch it move.
- The Red Sox Foundation Inc — 2% of income from government
- The Shelter for Abused Women & Children Inc — 2% of income from government
- Gulfshore Playhouse Inc — 0% of income from government
- Youth Haven Inc — 0% of income from government
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.
Warm introductions · Powered by PlinthPlus
How do I get to The McMahon Foundation?
Find your warmest path to The McMahon 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.