Skip to content
Mahaffey Family Foundation at a glance

· 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.

$80k
Granted FY2024still arriving
6
Grants FY2024still arriving
2
States reached
$20k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Religion$200kEducation$122kHuman Services$104kHealth$77kPhilanthropy$60kYouth Development$36kArts & Culture$25kHousing & Shelter$20kOther$0
02FY2024 · 6 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k2 grants · $15k
  • $10k–50k4 grants · $65k
$15,000
Median grant
2
States reached
$546k
Total assets
Largest grants
RecipientAmount
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 Thomas Episcopal Church$7,500
St Petersburg Free Clinic$7,500
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:

Its 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 its grants land in higher-need ZIPs.

area typical 11%CLOTHES to KIDS: $10k → 12%Clothes to Kids: $10k → 12%CLOTHES to KIDS: $5k → 12%CLOTHES to KIDS: $5k → 12%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.

89%of every dollar goes to organizations it has funded before.
$566k · 15 repeat orgs$70k to everyone else

Grantees it renews have grown median revenue +65% since the first grant, against +64% for those funded once.

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

Re-uppedFunded once

Organizations

15
6

Total granted

$566k
$42k

Median revenue growth · since first grant

+65%
+64%

Still filing today

67%
33%

New vs renewed · share of each year

In FY2024, 54% of grant dollars renewed an existing relationship; $28k went to new ones.

50%100%’17’18’19’20’21’22’23’24
RenewedFirst-time

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

’17’18’19’20’21’22’23’24
EducationCrime & LegalYouth DevelopmentArts & CultureEmploymentHuman 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

  • SM
    SAINT MARY-OF-THE-WOODS COLLEGE
    3× · 2017–2022 · $60k · revenue +65%
  • SV
    SUNCOAST VOICES FOR CHILDREN FOUNDATION INC
    5× · 2017–2021 · $48k · revenue +170%
  • St Petersburg Free Clinic Inc
    8× · 2017–2024 · $42k · revenue +185%

Funded once

  • AP
    academy prep center for education
    one grant, 2018 · $17k
  • VG
    Van Gogh's Palette Inc
    one grant, 2017 · $5k · revenue +6%
  • AS
    AMERICAN STAGE THEATER CO
    one grant, 2017 · $5k
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
Suncoast Partnership to End Homelessness

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…

Human Services
2
Tampa Bay Partnership Inc

The tampa bay partnership is a privately funded, ceo-driven regional advocacy organization, committed to creating a unified, competitive and prosperous tampa bay.

—
3
St Joseph's Hospital of Tampa Foundation Inc

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…

Health
4
The Arc Tampa Bay Foundation Inc

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…

Human Services
5
Keep Tampa Bay Beautiful

To promote a culture of environmental stewardship through volunteer and educational opportunities.

Environment
6
Gulf Coast Partnership Inc

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…

Housing & Shelter
7
University of Florida Health Corporation

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,…

—
8
Florida Gulf Coast University Foundation Inc

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…

Education
9
The Hospice of the Florida Suncoast Inc

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.

Human Services
10
Lighthouse Central Florida Inc

Charting a course for living, learning, and earning with vision loss.

Human Services
11
Children's Museum of Tampa Inc

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…

Arts & Culture
12
Senior Friendship Centers Inc

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…

—
How this is measured
The grantee most central to the portfolio’s shape is Community Foundation of Tampa Bay Inc; 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.
04the grantee network

13 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. 13 of the 24 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)
3
Early backer (in before they grew)
13/13
Grantees still filing
12/13
Grew since first funded

Where the money sits, by cause and then by grantee

LUTHERAN CHURCH OF THE CROSS DAY SC: $110,000 · OtherLUTHERAN CHURCH OF THE CROSS DAY SCSISTERS OF PROVIDENCE OF SAINT MARY-OF-THE-WOODS: $77,500 · OtherSISTERS OF PROVIDENCE OF SAINT MARY-OF-THE-WOODSSt Petersburg Free Clinic Inc: $42,000 · OtherSt Petersburg Free Clinic IncIndividual grant recipient: $30,000 · OtherIndividual grant recipientPinellas Hope Catholic Charities: $21,000 · OtherLUTHERAN CHURCH OF THE CROSS DAY SCHOOL INC: $20,000 · OtherSTARTING RIGHT NOW: $20,000 · OtherSUNCOAST HOSPICE FOUNDATION: $18,000 · Otheracademy prep center for education: $17,000 · OtherTAMPA BAY WATCH INC: $17,500 · Other+7 more: $44,000 · Other+7 moreSAINT MARY-OF-THE-WOODS COLLEGE: $60,000 · EducationSAINT MARY-OF…University of South Florida Foundation Inc: $25,000 · EducationUniversity of…COMMUNITY FOUNDATION OF TAMPA BAY INC: $60,000 · PhilanthropyCOMMUNITY…SUNCOAST VOICES FOR CHILDREN FOUNDATION INC: $47,500 · Crime & LegalFRAMEWORKS OF TAMPA BAY INC: $35,500 · Youth DevelopmentCLOTHES TO KIDS INC: $30,000 · Human ServicesGREAT EXPLORATIONS INC: $20,000 · Arts & Culture
Other$417,000Education$85,000Philanthropy$60,000Crime & Legal$47,500Youth Development$35,500Human Services$30,000Arts & Culture$20,000

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

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetCOMMUNITY FOUNDATION OF TAMPA BAY INC: $60,000 over 3y, 0.0% of budgetSAINT MARY-OF-THE-WOODS COLLEGE: $60,000 over 3y, 0.1% of budgetSUNCOAST VOICES FOR CHILDREN FOUNDATION INC: $47,500 over 5y, 2.9% of budgetSt Petersburg Free Clinic Inc: $42,000 over 8y, 0.0% of budgetFRAMEWORKS OF TAMPA BAY INC: $35,500 over 7y, 0.6% of budgetCLOTHES TO KIDS INC: $30,000 over 4y, 0.4% of budgetUniversity of South Florida Foundation Inc: $25,000 over 5y, 0.0% of budgetGREAT EXPLORATIONS INC: $20,000 over 4y, 0.2% of budgetSTARTING RIGHT NOW: $20,000 over 3y, 0.2% of budgetTAMPA BAY WATCH INC: $17,500 over 3y, 0.4% of budgetLifePath Hospice Inc: $11,500 over 2y, 0.0% of budgetVan Gogh's Palette Inc: $5,000 over 1y, 0.3% of budgetA DOOR OF HOPE INC: $5,000 over 1y, 0.3% 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.

  • 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 GREAT EXPLORATIONS INC ↗
  • Who funds STARTING RIGHT NOW ↗
  • Who funds TAMPA BAY WATCH INC ↗
  • Who funds LifePath Hospice Inc ↗
  • Who funds Van Gogh's Palette Inc ↗
  • Who funds A DOOR OF HOPE INC ↗

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.

Community Foundation …Pinellas Community Fo…Rays Baseball Foundat…Vinik Family Foundati…Debartolo Family Foun…Duke Energy FoundationDwayne Hawkins Family…The Parallel Foundati…Alvah H & Wyline P Ch…Natl Christian Charit…Raymond James Charita…Jpmorgan Chase Founda…
Community Foundation of Tampa Bay IncFL19.4× affinity7 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

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

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 Mahaffey Family Foundation funds: left to right is the share of its income from government, bottom to top the share from Mahaffey Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 80%0%1%3%5%funder's share of their income ↑0%4%8%11%15%share of the org’s income from government →median 1%
  • Great Explorations Inc: 1% of income from government
no gov moneyreceives it· size = income
8get no government money at all
3report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–15%
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 24 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-PF e-file return for fiscal year 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Mahaffey Family’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