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Plinth

· Private foundation

Tuthill Square Foundation

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.

$9k
Granted FY2025still arriving
21
Grants FY2025still arriving
9
States reached
$2k
Largest
01What you fund
0184% classified

What you funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year — across FY20172025.

Education$20kReligion$6kPublic Safety & Disaster$5kArts & Culture$5kHealth$4kAnimals$3kRecreation & Sports$3kCommunity Improvement$3kOther$0
02FY2025 · 21 grants

Where the money goes

Your grants by size, and where they go.

$250
Median grant
9
States reached
$181k
Total assets
Largest grants
RecipientAmount
Individual grant recipient$1,500
ALL SAINTS CHURCH$1,000
UNIVERSITY OF THE SOUTH$750
INDIAN SPRINGS SCHOOL$750
RANDOLPH COLLEGE$750
PRODISEE PANTRY$500
MOBILE ANIMAL SHELTER$500
FORT MORGAN VOLUNTEER FIRE$500
DOCTORS WITH OUT BORDERS$250
FEEDING THE GULF COAST$250
CHURCH OF THE EPIPHANY$250
FRIENDS OF MUNICIPAL PARK$250
FOUNDATION FOR FIGHTING BLINDNESS$250
MOBILE CANIVAL ASSN$250
NATIONAL TRUST FOR HISTORIC PRESERV$250
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 (FY25–25, $250) land where the poverty rate runs at 19%, against an area that typically sits at 8%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.

area typical 8%FRIENDS OF MUNICIPAL PARK: $250 → 19%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.

Which US states your grants reach

PA
CA
VA
MD
AR
TN
SC
DC
AL
GA
FL

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.

91%of every dollar goes to organizations you’ve funded before.
$59k · 25 repeat orgs$6k to everyone else

And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +15% since the first grant, against -12% for the ones you funded once.

25 repeat relationships — 18 still active in FY2025, 7 since wound down; 3 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

25
16

Total granted

$59k
$5k

Median revenue growth · since first grant

+15%
-12%

Still filing today

40%
19%

New vs renewed · share of each year

In FY2025, 92% of grant dollars renewed an existing relationship; $750 went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25
EducationHealthArts & CultureCommunity ImprovementRecreation & SportsAnimalsOther

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

  • RANDOLPH COLLEGE INC
    5× · 2021–2025 · $5k · revenue +15%
  • THE FOUNDATION FIGHTING BLINDNESS INC
    5× · 2021–2025 · $2k · revenue +23%
  • MC
    MOBILE CARNIVAL ASSOCIATION INC
    5× · 2021–2025 · $2k · revenue +103%

Funded once

  • TV
    THE VILLAGE OF SPRING HILL INC
    one grant, 2021 · $3k · revenue -73%
  • MD
    MYOTONIC DYSTROPHY FOUNDATION INCgraduated
    one grant, 2021 · $500 · revenue +54%
  • HM
    Historic Mobile Preservation Society Inc
    one grant, 2018 · $250 · revenue -12%

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
The University Foundation

The university foundation is organized to assist and aid the board of trustees of the university of alabama in fulfilling its educational, research, and public service programs and activities.

2
The Medical Foundation of Alabama

To further the image of medicine through financial support for health education programs and projects

3
Mountain Brook City Schools Foundation

The mission of the Foundation is to mobilize community support and resources for the academic improvement of the Mountain Brook City School System through technological improvement, library enhancement, and professional development.

Education
4
Uab Educational Foundation

To support the university of alabama at birmingham in its scientific and educational mission, including managing and disbursing funds, acquiring real property, and providing operational flexibility.

Education
5
Michigan Biotechnology Institute

Bridging the gap between early-stage innovation and commercial application. partnering to de-risk, develop and scale-up discoveries into commercially-viable technology packages.

Education
6
Alabama a&M University Foundation

The Alabama A&M University Foundation was established to receive, hold, invest, manage, use, and administer property of all kinds, whether given absolutely or in trust, for the benefit of Alabama A&M University and its educational,…

7
University of Southern Mississippi Foundation

To build relationships with alumni and friends in order to secure private funds and other resources for the benefit of the university of southern mississippi (usm). the foundation receives, invests and distributes private gifts in support…

Education
8
Marine Environmental Sciences Consortium

To conduct pure and applied research, provide both structured education programs and information in non-instructional formats for individuals, organizations, and governance interested in and dependent upon the coastal and marine…

Science & Tech
9
Musc Foundation for Research Development

1. to support the educational, research, and healthcare mission of the medical university of south carolina (musc) by fostering creativity and innovation. 2. to initiate and sustain cooperation and collaboration between musc and business…

Health
10
Mississippi State University Foundation Inc

Mississippi state university foundation, inc. is a non-profit organization that assists mississippi state university in accomplishing its goals and mission by cultivating and soliciting private support and ensuring stewardship for all…

Human Services
11
The Myelodysplastic Syndromes Foundation

The myelodysplastic syndromes foundation (mdsf) is a global nonprofit organization dedicated to supporting patients and caregivers affected by myelodysplastic syndromes (mds), a group of rare and life-threatening bone marrow disorders, and…

Health
12
Mobile Baykeeper Inc

Provide citizens a means to protect the beauty, health and heritage of the Mobile Bay Watershed, Alabamas waterways and coastal communities.

Environment

For reference, the grantee most central to the portfolio’s shape is The Village of Spring Hill Inc and the most unlike its peers is Boykin Spaniel Foundation. 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

16 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. 16 of the 44 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)
3
Early backer (in before they grew)
15/16
Grantees still filing
7/16
Grew since you first funded

Where your money sits — by cause, then by grantee

Individual grant recipient — $8,450 · OtherIndividual grant recipientALL SAINTS CHURCH — $5,100 · OtherALL SAINTS CHURCHFORT MORGAN VOLUNTEER FIRE — $3,250 · OtherFORT MORGAN VOLUNTEER FIREHISTORIC MOBILE PRRESERVATION SOCIE — $2,750 · OtherHISTORIC MOBILE PRRESERVATION SOCIEHEIFER INTERNATIONAL — $2,050 · OtherHEIFER INTERNATIONALFRIENDS OF THE MOBILE ANIMAL SHELTE — $1,500 · Other+27 more — $10,335 · Other+27 moreUNIVERSITY OF THE SOUTH — $5,750 · EducationUNIVERSITY OF THE SOUTHINDIAN SPRINGS SCHOOL — $5,750 · EducationINDIAN SPRINGS SCHOOLRANDOLPH COLLEGE INC — $5,250 · EducationRANDOLPH COLLEGE INCBARTON ACADEMY FOUNDATION — $2,500 · EducationBARTON ACADEMY FOUNDATIONTHE FOUNDATION FIGHTING BLINDNESS INC — $2,250 · HealthST JUDE CHILDREN'S RESEARCH HOSPITAL INC — $1,500 · HealthMYOTONIC DYSTROPHY FOUNDATION INC — $500 · HealthTHE VILLAGE OF SPRING HILL INC — $2,500 · Community ImprovementMOBILE CARNIVAL ASSOCIATION INC — $2,250 · Recreation & SportsProdisee Pantry Inc — $1,500 · Public Safety & DisasterEQUAL JUSTICE INITIATIVE — $1,250 · Civil Rights
Other$33,435Education$19,250Health$4,250Community Improvement$2,500Recreation & Sports$2,250Public Safety & Disaster$1,500Civil Rights$1,250

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 budgetUNIVERSITY OF THE SOUTH — $5,750 over 5y, 0.0% of budgetINDIAN SPRINGS SCHOOL — $5,750 over 5y, 0.1% of budgetRANDOLPH COLLEGE INC — $5,250 over 5y, 0.0% of budgetTHE VILLAGE OF SPRING HILL INC — $2,500 over 1y, 0.7% of budgetBARTON ACADEMY FOUNDATION — $2,500 over 2y, 0.1% of budgetTHE FOUNDATION FIGHTING BLINDNESS INC — $2,250 over 5y, 0.0% of budgetMOBILE CARNIVAL ASSOCIATION INC — $2,250 over 5y, 0.0% of budgetST JUDE CHILDREN'S RESEARCH HOSPITAL INC — $1,500 over 5y, 0.0% of budgetProdisee Pantry Inc — $1,500 over 4y, 0.0% of budgetEQUAL JUSTICE INITIATIVE — $1,250 over 3y, 0.0% of budgetBOYKIN SPANIEL FOUNDATION — $700 over 5y, 0.5% of budgetMYOTONIC DYSTROPHY FOUNDATION INC — $500 over 1y, 0.0% of budgetHistoric Mobile Preservation Society Inc — $250 over 1y, 0.2% of budgetFeeding the Gulf Coast — $250 over 1y, 0.0% 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.

  • Who funds UNIVERSITY OF THE SOUTH
  • Who funds INDIAN SPRINGS SCHOOL
  • Who funds RANDOLPH COLLEGE INC
  • Who funds THE VILLAGE OF SPRING HILL INC
  • Who funds BARTON ACADEMY FOUNDATION
  • Who funds THE FOUNDATION FIGHTING BLINDNESS INC
  • Who funds MOBILE CARNIVAL ASSOCIATION INC
  • Who funds ST JUDE CHILDREN'S RESEARCH HOSPITAL INC
  • Who funds Prodisee Pantry Inc
  • Who funds EQUAL JUSTICE INITIATIVE
  • Who funds BOYKIN SPANIEL FOUNDATION
  • Who funds MYOTONIC DYSTROPHY FOUNDATION INC
  • Who funds FRIENDS OF MUNICIPAL PARK
  • Who funds MEDECINS SANS FRONTIERES USA INC
  • Who funds Historic Mobile Preservation Society Inc
  • Who funds Feeding the Gulf Coast

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.

Hearin - Chandler FoundationAL13.6× affinity4 shared granteesties to 3 of 3Hover any node to trace its alignments.Compare side by side →

Open a dossier: Hearin - Chandler Foundation · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · 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 Tuthill Square 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 or a single department — and drag the year to watch it move.

2024
202122232425
no gov · 10%0%1%3%5%your share of their income ↑0%3%5%8%10%share of the org’s income from government
    no gov moneyreceives it· size = income
    1get no government money at all
    1report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–10%
    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 44 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

    More from the funding graph