· Private foundation
Tonkinson Foundation Inc
Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.
What it funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.
Where the money goes
Grants by size, and the largest recipients.
By grant size · FY2025
- Under $10k38 grants · $75k
- $10k–50k6 grants · $125k
- $50k–250k3 grants · $225k
| Recipient | Amount |
|---|---|
| Friends of the Underline | $100,000 |
| Florida International University Fnd | $74,750 |
| Diabetes Research Foundation | $50,000 |
| University of Miami | $32,000 |
| Coral Gables Community Foundation | $28,500 |
| National Geographic Society | $20,000 |
| Zoo Miami Foundation | $15,800 |
| The Way Forward Foundation | $15,000 |
| Branches Inc | $13,500 |
| Deering Estate Foundation | $7,800 |
| The Villagers | $5,000 |
| Clearwater Free Clinic Inc | $5,000 |
| Foundation for New Education Initia | $5,000 |
| Egyptian Theater Park City | $5,000 |
| South Florida SPCA | $5,000 |
Does the money reach high-need areas?
Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.
Its human-services grants (FY17–25, $366k) land where the poverty rate runs at 13%, against an area that typically sits at 9%. 85% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.
How this is measured
Which US states its grants reach
How this is measured
Who it funds again
Organizations funded in more than one year, against those funded once.
Grantees it renews have grown median revenue +36% since the first grant, against +13% for those funded once.
69 repeat relationships: 38 still active in FY2025, 31 since wound down; 8 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, 94% of grant dollars renewed an existing relationship; $26k went to new ones.
Where new relationships form · theme of each grantee’s first grant
How this is measured
Backed again, and grew
- UOUniversity of Miami9× · 2017–2025 · $243k · revenue +96%
- FOFRIENDS OF THE UNDERLINE INC6× · 2020–2025 · $203k · revenue +445%
- TWThe Woody Foundation Inc dba The Way Forward Foundation8× · 2017–2024 · $122k · revenue +10%
Funded once
- DFDRI Foundationone grant, 2018 · $36k
- AAADRIENNE ARSHT CENTER FOUNDATION INCone grant, 2017 · $10k · revenue +13%
- MCMALTA CROSS FOUNDATION INTERNATIONAL INCone grant, 2022 · $9k
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.
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.
The mission of florida grand opera is to enrich people's lives through an awareness and deeper appreciation of opera while supporting the operations of the greater miami opera and the opera guild, inc. by expanding its reach to diverse…
Marine research
In 2024, biscayne bay waterkeeper (d/b/a miami waterkeeper) built on our reputation by navigating challenges, seizing opportunities, and continuing our unwavering commitment to safeguarding our precious waterways and finding local…
The advancement of marine and environmental sciences through scientific research, education and public outreach, leading new discoveries, revitalization and sustainability of our oceans and greater public understanding of our marine…
To serve as a catalyst for the establishment of miami as the technology hub for the americas in order to propel innovation and investment in south florida and latin america.
The fiu research foundation provides means by which discoveries, inventions, processes, and work products of faculty, staff and students of the university may be patented, developed, applied and utilized in order that the results of such…
Offer cultural experience
How this is measured
51 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. 51 of the 100 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.
Where the money sits, by cause and then by grantee
Each grantee by its size and the funder’s share of it; top left is load-bearing
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 University of Miami ↗
- Who funds FRIENDS OF THE UNDERLINE INC ↗
- Who funds The Woody Foundation Inc dba The Way Forward Foundation ↗
- Who funds SHELTERBOX USA INC ↗
- Who funds CORAL GABLES COMMUNITY FOUNDATION INC ↗
- Who funds ZOO MIAMI FOUNDATION INC ↗
- Who funds FOUNDATION FOR NEW EDUCATION INITIATIVES INC ↗
- Who funds ROTARY FOUNDATION OF CORAL GABLES INC ↗
- Who funds THE DEERING ESTATE FOUNDATION INC ↗
- Who funds NATIONAL GEOGRAPHIC SOCIETY ↗
- Who funds Clearwater Free Clinic Inc ↗
- Who funds CHAPMAN PARTNERSHIP INC ↗
- Who funds South Florida SPCA Inc ↗
- Who funds SOUTH FLORIDA PROGRESS FOUNDATION INC ↗
- Who funds ORCHESTRA MIAMI INC ↗
- Who funds Love Fund Inc ↗
- Who funds SPECIAL OLYMPICS FLORIDA Inc ↗
- Who funds THE MIAMI FOUNDATION INC ↗
- Who funds Miami Rescue Mission Inc ↗
- Who funds ACTORS' PLAYHOUSE PRODUCTIONS INC ↗
- Who funds FAIRCHILD TROPICAL BOTANIC GARDEN INC ↗
- Who funds SOUTH FLORIDA PBS INC ↗
- Who funds ADRIENNE ARSHT CENTER FOUNDATION INC ↗
- Who funds MIAMI LIGHTHOUSE FOR THE BLIND AND VISUALLY IMPAIRED INC ↗
- Who funds TROPICAL AUDUBON SOCIETY INC ↗
- Who funds MIAMI MUSIC PROJECT INC ↗
- Who funds GUITARS OVER GUNS ORGANIZATION 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.
Open a dossier: The Miami Foundation Inc · Mightycause Charitable Foundation · The Batchelor Foundation Inc · The Kirk Foundation · Dunspaugh Dalton Foundation Inc · John S and James L Knight Foundation · Peacock Foundation Inc · Greater Miami Jewish Federation Inc · Key Biscayne Community Foundation Inc · Westminster Barrington Foundation · United Way Miami Inc · Goldsmith Family Foundation Inc
How this is measured
How much its grantees rely on government
Each dot is one organization Tonkinson Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from Tonkinson Foundation Inc. Bigger dots raise more.
- Friends of the Underline Inc: 66% of income from government
- Voices for Children Foundation Inc: 48% of income from government
- Als Therapy Development Foundation Inc: 8% of income from government
- University of Miami: 5% of income from government
- Fairchild Tropical Botanic Garden Inc: 4% of income from government
- Miami Music Project Inc: 2% of income from government
- Guitars Over Guns Organization Inc: 1% of income from government
- Jackson Health Foundation Inc: 1% of income from government
- Spca Inc: 0% of income from government
- Miami Lighthouse for the Blind and Visually Impaired Inc: 0% of income from government
- Chapman Partnership Inc: 0% of income from government
- Food for the Poor Inc: 0% of income from government
- Zoo Miami Foundation Inc: 0% of income from government
- South Florida Pbs Inc: 0% of income from government
How this is measured
Warm introductions · Powered by PlinthPlus
How do I get to Tonkinson Foundation Inc?
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