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The Tiller Family Foundation at a glance

· Private foundation

The Tiller Family 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.

$96k
Granted FY2025still arriving
14
Grants FY2025still arriving
5
States reached
$50k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead

Read this first · the figures below need context

52% of The Tiller Family Foundation’s FY2025 grant dollars went to Mayo Clinic, not to grantees.

Its money now reaches organizations through that sponsor, which does not report who recommended each grant. FY2025 names 10 organizations directly, so a portfolio cannot be read from it.

Organizations named directly on the return

8
’17
11
’19
9
’20
10
’21
7
’22
7
’23
6
’24
10
’25

Amber years are those where most dollars went to a sponsor.

01What it funds
0199% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Health$401kArts & Culture$89kEducation$62kReligion$42kInternational$25kFood & Nutrition$24kPublic Benefit$20kHuman Services$6kOther$0
02FY2025 · 14 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k12 grants · $36k
  • $10k–50k1 grant · $10k
  • $50k–250k1 grant · $50k
$3,000
Median grant
5
States reached
$1.4M
Total assets
Largest grants
RecipientAmount
MAYO CLINIC$50,000
DATTILIO MEDICAL MISSION$10,000
FRIENDS OF THE CHARLOTTE NEWS$7,000
ARIZONA STATE UNIVERSITY FOUNDATION$6,000
OUR LADY OF MOUNT CARMEL PARISH$5,000
SHELBURNE MUSEUM INC$3,000
OUR LADY OF JOY CATHOLIC PARISH$3,000
SHELBURNE FARMS$2,500
ORDWAY CENTER FOR THE PERFORMING ARTS$2,500
THE CHARLOTTE FOOD SHELF$2,000
CHILDREN OF FALLEN PATRIOTS FDN$1,500
SPECIAL FORCES FOUNDATION$1,000
FRIENDS OF CHARLOTTE SENIOR CENTER$1,000
DESERT FOOTHILLS THEATER$1,000
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 (FY17–25, $7k) land where the poverty rate runs at 10%, against an area that typically sits at 7%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 7%RYAN HOUSE: $2k → 11%LEADER DOGS FOR THE BLIND: $2k → 8%THE CHARLOTTE FOOD SHELF: $2k → 10%CHARLOTTE FOOD SHELF INC: $1k → 10%CHARLOTTE FOOD SHELF INC: $500 → 10%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.

Which US states its grants reach

VT
WA
MN
IL
MI
MA
UT
CO
VA
AZ
AL
FL
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.

67%of every dollar goes to organizations it has funded before.
$210k · 15 repeat orgs$102k to everyone else

Grantees it renews have grown median revenue +50% since the first grant, against +26% for those funded once.

15 repeat relationships: 9 still active in FY2025, 6 since wound down; 4 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

15
26

Total granted

$210k
$87k

Median revenue growth · since first grant

+50%
+26%

Still filing today

67%
38%

New vs renewed · share of each year

In FY2025, 68% of grant dollars renewed an existing relationship; $15k went to new ones.

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

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

’17’19’20’21’22’23’24’25
EducationArts & CultureHuman ServicesPhilanthropyEnvironmentEmploymentOther
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

  • ARIZONA STATE UNIVERSITY FOUNDATION FOR A NEW AMERICAN UNIVERSITY
    7× · 2017–2025 · $43k · revenue +196%
  • SHELBURNE FARMS
    7× · 2019–2025 · $21k · revenue +50%
  • SM
    SHELBURNE MUSEUM INC
    7× · 2019–2025 · $19k · revenue +261%

Funded once

  • TO
    Town of Charlotte
    one grant, 2019 · $20k
  • FB
    FAIRVIEW BEHAVIORAL SERVICES
    one grant, 2017 · $10k
  • PO
    PLACE OF HOPE HAITI
    one grant, 2017 · $10k
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
Park Square Theatre

To enrich the community by producing and presenting exceptional live theatre that touches the heart, engages the mind and delights the spirit.

—
2
President and Fellows of Harvard College

Undergraduate, graduate, and professional education and research across a broad array of academic domains.

Education
3
Santa Fe Institute

The santa fe institute is a transdisciplinary research community that expands the boundaries of scientific understanding. its aim is to discover, comprehend, and communicate the common fundamental principles in complex physical,…

Science & Tech
4
Trustees of Dartmouth College

Dartmouth College educates the most promising students and prepares them for a lifetime of learning and of responsible leadership, through a faculty dedicated to teaching and the creation of knowledge.

Education
5
Furman University

The primary mission of furman as a liberal arts institution is to provide a distinctive education in fine arts, humanities, social sciences, mathematics and the sciences, as well as selected professional disciplines.

Education
6
Children's Health Care

We champion the health needs of children and families. we are committed to improving children's health by providing the highest-quality, family centered care, advanced through research and education.

Health
7
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
8
Endicott College

Endicott college offers students a vibrant academic environment that remains true to its founding principle of integrating professional and liberal arts with experiential learning. for more information see schedule o.

Education
9
Lowell Observatory

The mission of lowell observatory is to pursue the study of astronomy, especially the study of our solar system and its evolution; to conduct pure research in astronomical phenomena; and to maintain quality public education and outreach…

Science & Tech
10
Minnesota Landscape Arboretum Foundation

To support charitable, plant-based scientific, and educational activities exclusively for the benefit of the minnesota landscape arboretum of the university of minnesota

Environment
11
Augustana College

Rooted in the liberal arts & sciences & lutheran expression of the christian faith, & is committed to offering a challenging education that develops qualities of mind, spirit, & body necessary for a rewarding life of leadership & service…

Education
12
Dickinson College

Dickinson college provides a useful, innovative and interdisciplinary education in the liberal arts and sciences to prepare students to lead rich and fulfilling lives of engaged global citizenship

Education
How this is measured
The grantee most central to the portfolio’s shape is Special Olympics Massachusetts Inc; the most unlike its peers is Zenith Services Incorporated. 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

24 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. 24 of the 46 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)
24/24
Grantees still filing
17/24
Grew since first funded

Where the money sits, by cause and then by grantee

MAYO CLINIC: $372,500 · HealthMAYO CLINICFRIENDS OF THE CHARLOTTE NEWS INC: $43,500 · OtherFRIENDS OF THE CHARLOTTE NEWS…OUR LADY OF MOUNT CARMEL PARISH: $21,500 · OtherOUR LADY OF MOUNT CARMEL PARI…Town of Charlotte: $20,000 · OtherTown of CharlotteOUR LADY OF JOY CATHOLIC PARISH: $15,000 · OtherOUR LADY OF JOY CATHOLIC PARI…DATTILIO MEDICAL MISSION LTD: $10,000 · OtherDATTILIO MEDICAL MISSION LTDFAIRVIEW BEHAVIORAL SERVICES: $10,000 · OtherFAIRVIEW BEHAVIORAL SERVICESPLACE OF HOPE HAITI: $10,000 · OtherPLACE OF HOPE HAITITCN INC: $7,000 · OtherARIZONA STATE UNIVERSITY: $6,000 · Other+20 more: $34,500 · Other+20 moreARIZONA STATE UNIVERSITY FOUNDATION FOR A NEW AMERICAN UNIVERSITY: $43,000 · EducationARIZONA S…Children of Fallen Patriots Foundation: $9,500 · EducationChildren …VERMONT FLIGHT ACADEMY INC: $2,500 · Education+1 more: $500 · EducationSHELBURNE MUSEUM INC: $18,500 · Arts & CultureGUTHRIE THEATER FOUNDATION: $6,000 · Arts & CultureHENNEPIN THEATRE TRUST: $5,500 · Arts & CultureORDWAY CENTER FOR THE PERFORMING ARTS: $2,500 · Arts & CultureSHELBURNE FARMS: $20,500 · EnvironmentZION NATURAL HISTORY ASSOCIATION: $2,000 · EnvironmentPLACE OF HOPE IN HAITI INC: $15,000 · PhilanthropySPECIAL FORCES FOUNDATION: $1,000 · PhilanthropyFOOTHILLS COMMUNITY FOUNDATION INC: $1,000 · PhilanthropyCHARLOTTE FOOD SHELF INC: $3,500 · Human ServicesRYAN HOUSE: $1,500 · Human ServicesLEADER DOGS FOR THE BLIND: $1,500 · Human Services
Health$372,500Other$177,500Education$55,500Arts & Culture$32,500Environment$22,500Philanthropy$17,000Human Services$6,500

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

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetMAYO CLINIC: $372,500 over 8y, 0.0% of budgetARIZONA STATE UNIVERSITY FOUNDATION FOR A NEW AMERICAN UNIVERSITY: $43,000 over 7y, 0.0% of budgetSHELBURNE FARMS: $20,500 over 7y, 0.0% of budgetSHELBURNE MUSEUM INC: $18,500 over 7y, 0.1% of budgetPLACE OF HOPE IN HAITI INC: $15,000 over 3y, 2.0% of budgetChildren of Fallen Patriots Foundation: $9,500 over 7y, 0.0% of budgetGUTHRIE THEATER FOUNDATION: $6,000 over 2y, 0.0% of budgetHENNEPIN THEATRE TRUST: $5,500 over 4y, 0.0% of budgetCHARLOTTE FOOD SHELF INC: $3,500 over 3y, 2.1% of budgetVERMONT FLIGHT ACADEMY INC: $2,500 over 1y, 0.1% of budgetORDWAY CENTER FOR THE PERFORMING ARTS: $2,500 over 1y, 0.0% of budgetTHE EDINA CRIME PREVENTION FUND INC: $2,000 over 1y, 0.9% of budgetZION NATURAL HISTORY ASSOCIATION: $2,000 over 1y, 0.0% of budgetCHARLOTTE FIRE AND RESCUE SERVICES INC: $2,000 over 1y, 0.2% of budgetRYAN HOUSE: $1,500 over 1y, 0.1% of budgetLEADER DOGS FOR THE BLIND: $1,500 over 1y, 0.0% of budgetSPECIAL OLYMPICS MINNESOTA INC: $1,000 over 2y, 0.0% of budgetSPECIAL FORCES FOUNDATION: $1,000 over 1y, 0.1% of budgetFOOTHILLS COMMUNITY FOUNDATION INC: $1,000 over 1y, 0.1% of budgetZENITH SERVICES INCORPORATED: $1,000 over 2y, 0.0% of budgetEQUAL JUSTICE INITIATIVE: $1,000 over 1y, 0.0% of budgetPAN-MASSACHUSETTS CHALLENGE INC: $1,000 over 1y, 0.0% of budgetSPECIAL OLYMPICS MASSACHUSETTS INC: $500 over 1y, 0.0% of budgetDUTCH HILL PTA 769: $500 over 1y, 0.7% 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 MAYO CLINIC ↗
  • Who funds ARIZONA STATE UNIVERSITY FOUNDATION FOR A NEW AMERICAN UNIVERSITY ↗
  • Who funds SHELBURNE FARMS ↗
  • Who funds SHELBURNE MUSEUM INC ↗
  • Who funds PLACE OF HOPE IN HAITI INC ↗
  • Who funds Children of Fallen Patriots Foundation ↗
  • Who funds GUTHRIE THEATER FOUNDATION ↗
  • Who funds HENNEPIN THEATRE TRUST ↗
  • Who funds CHARLOTTE FOOD SHELF INC ↗
  • Who funds VERMONT FLIGHT ACADEMY INC ↗
  • Who funds ORDWAY CENTER FOR THE PERFORMING ARTS ↗
  • Who funds THE EDINA CRIME PREVENTION FUND INC ↗
  • Who funds ZION NATURAL HISTORY ASSOCIATION ↗
  • Who funds CHARLOTTE FIRE AND RESCUE SERVICES INC ↗
  • Who funds RYAN HOUSE ↗
  • Who funds LEADER DOGS FOR THE BLIND ↗
  • Who funds SPECIAL OLYMPICS MINNESOTA INC ↗
  • Who funds SPECIAL FORCES FOUNDATION ↗
  • Who funds FOOTHILLS COMMUNITY FOUNDATION 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.

Morgan Stanley Global…National Philanthropi…Donor Advised Charita…American Online Givin…Fidelity Investments …Amazonsmile Foundation
Morgan Stanley Global Impact Funding Trust IncIN7.8× affinity5 shared granteesties to 5 of 5Hover any node to trace its alignments.Compare side by side →

Open a dossier: Morgan Stanley Global Impact Funding Trust Inc · National Philanthropic Trust · Donor Advised Charitable Giving Inc · American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile 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 The Tiller Family Foundation funds: left to right is the share of its income from government, bottom to top the share from The Tiller Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 30%0%1%3%5%funder's share of their income ↑0%15%30%45%60%share of the org’s income from government →median 3%
  • Shelburne Museum Inc: 9% of income from government
  • Shelburne Farms: 3% of income from government
  • Special Olympics Massachusetts Inc: 1% of income from government
  • Pan-Massachusetts Challenge Inc: 0% of income from government
no gov moneyreceives it· size = income
3get no government money at all
7report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–60%
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 46 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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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