· Private foundation
Mahaffey Family Foundation
Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k2 grants · $15k
- $10k–50k4 grants · $65k
| Recipient | Amount |
|---|---|
| Community Foundation Tampa Bay | $20,000 |
| Lutheran Church of the Cross Day School | $20,000 |
| Sisters of Providence | $15,000 |
| Clothes to Kids | $10,000 |
| St Petersburg Free Clinic | $7,500 |
| St Thomas Episcopal Church | $7,500 |
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 (FY21–24, $30k) land where the poverty rate runs at 12%, against an area that typically sits at 11%. 100% of those 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.
15 repeat relationships — 3 still active in FY2024, 12 since wound down; 2 grantees were first funded in FY2024 (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 FY2024, 54% of grant dollars renewed an existing relationship; $28k 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
- SMSAINT MARY-OF-THE-WOODS COLLEGE3× · 2017–2022 · $60k · revenue +65%
- SVSUNCOAST VOICES FOR CHILDREN FOUNDATION INC5× · 2017–2021 · $48k · revenue +170%
St Petersburg Free Clinic Inc8× · 2017–2024 · $42k · revenue +185%
Funded once
- APacademy prep center for educationone grant, 2018 · $17k
- SCst columbkille catholic parishone grant, 2022 · $5k
- ADA DOOR OF HOPE INCgraduatedone grant, 2021 · $5k · revenue +64%
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.
Lead agency in the community for providers of homeless/prevention services in manatee/sarasota. responsible to plan strategies with community partners, assist with grants, educate the public, advocate with local leadership, administer the…
The tampa bay partnership is a privately funded, ceo-driven regional advocacy organization, committed to creating a unified, competitive and prosperous tampa bay.
St. joseph's hospitals foundation secures, manages and stewards philanthropic support to benefit the health care mission of st. joseph's hospital, st. joseph's women's hospital, st. joseph's children's hospital of tampa, st. joseph's…
To secure the financial future of services for people with intellectual and developmental disabilities served by the arc tampa bay, inc. (continued on schedule o)this mission is accomplished through a comprehensive plan of building…
To promote a culture of environmental stewardship through volunteer and educational opportunities.
Gulf coast partnership, inc. (the organization) mission is to prevent homelessness in charlotte county. the organization is a department of hud lead agency on homelessness in the state of florida. the organization is funded through a…
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,…
To advance florida gulf coast university and its students by promoting the institution, securing philanthropy to support the needs of the university, managing and administering assets with a long term perspective, and providing resources…
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.
Charting a course for living, learning, and earning with vision loss.
We create and foster engaging, impactful play experiences for children and families to learn and thrive.the museum's vision is to be a vibrant and indispensable part of a community where everyone is included, enabled and empowered to dream…
Senior friendship centers, inc. (sfc) was founded in 1974 to reduce isolation & loneliness & to help seniors maintain their independence, preventing premature institutionalization. the mission is to support health, dignity & quality…
For reference, the grantee most central to the portfolio’s shape is Community Foundation of Tampa Bay Inc and the most unlike its peers is Starting Right Now. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
13 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. 13 of the 24 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 COMMUNITY FOUNDATION OF TAMPA BAY INC ↗
- Who funds SAINT MARY-OF-THE-WOODS COLLEGE ↗
- Who funds SUNCOAST VOICES FOR CHILDREN FOUNDATION INC ↗
- Who funds St Petersburg Free Clinic Inc ↗
- Who funds FRAMEWORKS OF TAMPA BAY INC ↗
- Who funds CLOTHES TO KIDS INC ↗
- Who funds University of South Florida Foundation Inc ↗
- Who funds STARTING RIGHT NOW ↗
- Who funds GREAT EXPLORATIONS INC ↗
- Who funds TAMPA BAY WATCH INC ↗
- Who funds LifePath Hospice Inc ↗
- Who funds A DOOR OF HOPE INC ↗
- Who funds Van Gogh's Palette 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: Community Foundation of Tampa Bay Inc · Pinellas Community Foundation · Rays Baseball Foundation Inc · Vinik Family Foundation · Debartolo Family Foundation Inc · Duke Energy Foundation · Dwayne Hawkins Family Foundation Inc D/B/A Crown Automotive Charities · The Parallel Foundation Inc · Alvah H & Wyline P Chapman Foundation · Natl Christian Charitable Fdn Inc · Raymond James Charitable Endowment Fund · Jpmorgan Chase 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 Mahaffey Family 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.
- Great Explorations Inc — 1% 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.