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Plinth

· Private foundation

Culbreath Family Foundation Inc

Its FY2025 filing reports that it accepted unsolicited grant applications.

$30k
Granted FY2025still arriving
5
Grants FY2025still arriving
3
States reached
$10k
Largest
01What you fund
0194% classified

What you funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year — across FY20202025.

Membership Benefit$45kEnvironment$33kPhilanthropy$30kArts & Culture$25kEducation$25kHealth$20kHuman Services$20kReligion$5kOther$0
02FY2025 · 5 grants

Where the money goes

Your grants by size, and where they go.

By grant size · FY2025

  • Under $10k4 grants · $20k
  • $10k–50k1 grant · $10k
$5,000
Median grant
3
States reached
$819k
Total assets
Largest grants
RecipientAmount
CORNERSTONE KIDS$10,000
FLORIDA WILDLIFE CORRIDOR FOUNDATION$7,500
MUSEUM OF EARLY SOUTHERN DECORATIVE ARTS (MESDA) - OLD SALEM INC$5,000
TAMPA GENERAL HOSPITAL FOUNDATION$5,000
FINCA VIGIA FOUNDATION$2,500
02The need
03

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.

show:

Your human-services grants (FY22–25, $20k) land where the poverty rate runs at 13%, against an area that typically sits at 12%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.

area typical 12%CORNERSTONE KIDS: $10k → 13%CORNERSTONE KIDS INC: $5k → 13%CORNERSTONE KIDS INC: $5k → 13%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount

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.

03Your edge
repeat funding

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.

83%of every dollar goes to organizations you’ve funded before.
$165k · 9 repeat orgs$35k to everyone else

9 repeat relationships — 3 still active in FY2025, 6 since wound down; 2 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

9
5

Total granted

$165k
$28k

Median revenue growth · since first grant

+42%
+85%

Still filing today

67%
40%

New vs renewed · share of each year

In FY2025, 75% of grant dollars renewed an existing relationship; $8k went to new ones.

50%100%’20’21’22’23’24’25
RenewedFirst-time

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

’20’21’22’23’24’25
EnvironmentHealthEducationPhilanthropyHuman ServicesArts & CultureOther

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

  • TG
    TAMPA GENERAL HOSPITAL FOUNDATION INC
    3× · 2020–2025 · $20k · revenue +249%
  • AP
    ACADEMY PREP CENTER OF ST PETERSBURG
    2× · 2020–2021 · $18k · revenue +57%
  • BT
    BOK TOWER GARDENS INC
    2× · 2022–2024 · $12k · revenue +42%

Funded once

  • TT
    THE TAMPA BAY HISTORY CENTERgraduated
    one grant, 2020 · $15k · revenue +85%
  • WF
    WILDPATH FOUNDATION INC
    one grant, 2023 · $5k
  • IW
    INTERNATIONAL WILDERNESS LEADERSHIP FOUNDATION INC
    one grant, 2024 · $3k · revenue 0%

Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.

04Your field

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.

1
Fairchild Tropical Botanic Garden Inc

We harness the power of plants for humankind and share the joy and beauty of tropical gardening with everyone. fairchild tropical botanic garden is a museum of tropical plants within a world famous, 83-acre designed landscape. it was…

Environment
2
The Everglades Foundation Inc

The mission of the foundation is to restore and protect america's everglades through its three programmatic pillars: science, advocacy and education. (continued on schedule o)

Environment
3
Saint Peters Landmark Preservation Trust
4
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
5
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.

6
National Tropical Botanical Garden

To enrich life by perpetuating tropical plants, ecosystems and cultural heritage through discovery, scientific research, conservation, and education.

Environment
7
Florida Conservation Group Inc

Mission is to seek protection of land and water resources through restoration and conservation; and conducting education and outreach on the ecological and economic importance of natural lands. we protect land from development and protect…

Environment
8
Archbold Expeditions Inc

Archbold expeditions, inc.'s mission is to build and share the scientific knowledge needed to protect the life, lands, and waters of the heart of florida and beyond.

Unclassified
9
The Florida Aquarium Inc

The Florida Aquarium's mission focuses on our Shared Purpose of a commitment to save marine wildlife, with a Vision to be Florida's leading conservation-based Aquarium. It accomplishes this mission through hosting over 1 million visitors…

Animals
10
The Everglades Trust Inc

To preserve america's everglades and florida bay as natural resources.

11
Lowry Park Zoological Society of Tampa Inc

The mission of the Lowry Park Zoological Society of Tampa a/k/a ZooTampa at Lowry Park, is to rescue, rehabilitate and care for animals.(Expanded mission on Schedule O)ZooTampa creates exceptional personalized experiences that connect…

Animals
12
Downtown Waterfront Parks Foundation Inc

The mission of the downtown waterfront parks foundation is to support and advocate for the preservation and enhancement of the historic waterfront parks of st. petersburg, florida to ensure their future for the enjoyment of residents and…

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 Gonzmart Family 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.

04the grantee network

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 20172025, not grant rows in a single year — so this will not match the grant count on the cover. 10 of the 17 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.

0
Load-bearing (≥25% of a budget)
2
Early backer (in before they grew)
10/10
Grantees still filing
5/10
Grew since you first funded

Where your money sits — by cause, then by grantee

HOPEWELL CHURCH CEMETERY FOUNDATION INC — $45,000 · OtherHOPEWELL CHURCH CEMETERY FOUNDATION INCBOK TOWER GARDENS INC — $12,000 · OtherBOK TOWER GARDENS INCIndividual grant recipient — $8,000 · OtherIndividual grant recipientMUSEUM OF EARLY SOUTHERN DECORATIVE ARTS (MESDA) - OLD SALEM INC — $5,000 · OtherMUSEUM OF EARLY SOUTHERN DECORATIVE ARTS (MESD…WILDPATH FOUNDATION INC — $5,000 · OtherWILDPATH FOUNDATION INCACADEMY OF THE HOLY NAMES — $4,500 · OtherINTERNATIONAL WILDERNESS LEADERSHIP FOUNDATION INC — $3,000 · Other+2 more — $4,500 · OtherFlorida Wildlife Corridor Foundation Inc — $17,500 · EnvironmentFlorida Wildlife …THE TAMPA BAY HISTORY CENTER — $15,000 · EnvironmentTHE TAMPA BAY HIS…GONZMART FAMILY FOUNDATION INC — $20,000 · PhilanthropyGONZMART FAMILY …COMMUNITY FOUNDATION OF TAMPA BAY INC — $10,000 · PhilanthropyCOMMUNITY FOUNDA…TAMPA GENERAL HOSPITAL FOUNDATION INC — $20,000 · HealthTAMPA GENE…CORNERSTONE KIDS INC — $20,000 · Human ServicesCORNERSTON…ACADEMY PREP CENTER OF ST PETERSBURG — $18,000 · EducationACADEMY P…THE FINCA VIGIA FOUNDATION INC — $2,500 · Arts & Culture
Other$87,000Environment$32,500Philanthropy$30,000Health$20,000Human Services$20,000Education$18,000Arts & Culture$2,500

Each org by its size and your share of it — top-left is where you’re load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ your share of their budgetGONZMART FAMILY FOUNDATION INC — $20,000 over 4y, 5.0% of budgetTAMPA GENERAL HOSPITAL FOUNDATION INC — $20,000 over 3y, 0.3% of budgetCORNERSTONE KIDS INC — $20,000 over 3y, 7.1% of budgetACADEMY PREP CENTER OF ST PETERSBURG — $18,000 over 2y, 0.4% of budgetFlorida Wildlife Corridor Foundation Inc — $17,500 over 3y, 0.1% of budgetTHE TAMPA BAY HISTORY CENTER — $15,000 over 1y, 0.6% of budgetBOK TOWER GARDENS INC — $12,000 over 2y, 0.1% of budgetCOMMUNITY FOUNDATION OF TAMPA BAY INC — $10,000 over 2y, 0.0% of budgetINTERNATIONAL WILDERNESS LEADERSHIP FOUNDATION INC — $3,000 over 1y, 0.1% of budget
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.

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.

Community Foundation of Tampa Bay IncFL13.3× affinity4 shared granteesties to 5 of 5Hover any node to trace its alignments.Compare side by side →

Open a dossier: Community Foundation of Tampa Bay Inc · The Bank of America Charitable Foundation Inc · 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 Culbreath Family Foundation Inc 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.

2024
202122232425
no gov · 50%1%3%6%10%your share of their income ↑0%10%20%30%40%share of the org’s income from governmentmedian 39%
  • The Finca Vigia Foundation Inc39% of income from government
  • Bok Tower Gardens Inc1% of income from government
no gov moneyreceives it· size = income
5get no government money at all
2report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–40%
typical government reliance, FY2025

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.

On method. Every financial figure here is read directly from IRS e-file XML — your own 990/990-PF and the multi-year returns of the 17 grantees we resolved across every year we hold, several hundred filings in all (a different count from the grant rows on the cover, which are one fiscal year)— each linked to its source. Grantee achievements and outcomes are each organization’s own program-service reporting (Form 990, Part III); we read these as association with sustained funding — the foundation is one of several forces — suppress low-confidence name matches rather than guess, and say so where a figure rests on a single grant or filing. Not everything on this page is a filed figure, and the difference matters. Filed is what you reported on your 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. How we build these →

Generated from your IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12–24 months behind; figures are dated accordingly.

Source object · view filing

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