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Tom and Carolyn Hamilton Family Fdn at a glance

· Private foundation

Tom and Carolyn Hamilton Family Fdn

Its FY2026 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$209k
Granted FY2026still arriving
17
Grants FY2026still arriving
10
States reached
$100k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
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 2023.

Education$1.1MHealth$330kScience & Tech$54kRecreation & Sports$40kArts & Culture$38kPublic Benefit$25kReligion$20kPhilanthropy$19kOther$0
02FY2026 · 17 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2026

  • Under $10k12 grants · $49k
  • $10k–50k4 grants · $61k
  • $50k–250k1 grant · $100k
$5,000
Median grant
10
States reached
$3.6M
Total assets
Largest grants
RecipientAmount
UNIVERSITY OF NORTH DAKOTA$100,000
CAPITAL FOOTBALL GRIDIRON FUND$25,000
Huntington's Disease Society of Ame$12,500
NATIONAL ALLIANCE ON MENTAL ILLNESS$12,500
CLUBHOUSE INTERNATIONAL$10,500
CM TUCKER NURSING CENTER$8,000
THE WORLD WAR II MUSEUM$6,500
AAPG FOUNDATION$5,750
CAPITAL UNIVERSITY$5,000
CFACT$3,500
THE HERITAGE FOUNDATION$3,500
HEARTLAND INSTITUTE$3,500
SCIENCE AND ENVIRONMENTAL POLICY$3,500
SEG FOUNDATION$2,750
HILLSDALE COLLEGE$2,750
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:

Dollar for dollar, its grants (FY17–26) land where the poverty rate runs at 15%, against an area that typically sits at 11%. 95% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%Huntington's Disease Society of Ame: $13k → 17%NAMI GREATER HOUSTON: $11k → 16%SEG FOUNDATION: $10k → 15%CAPITAL UNIVERSITY: $606k → 15%UNIVERSITY OF NORTH DAKOTA: $100k → 13%NATIONAL ALLIANCE ON MENTAL ILLNESS: $13k → 7%THE WORLD WAR II MUSEUM: $12k → 23%HUNTINGTON'S DISEASE SOCIETY OF AME: $12k → 17%NAMI GREATER HOUSTON: $11k → 16%SEG FOUNDATION: $10k → 15%CAPITAL UNIVERSITY: $30k → 15%UNIVERSITY OF NORTH DAKOTA: $100k → 13%NATIONAL ALLIANCE ON MENTAL ILLNESS: $12k → 7%CLUBHOUSE INTERNATIONAL: $12k → 17%NAMI GREATER HOUSTON: $10k → 16%SEG FOUNDATION: $10k → 15%CAPITAL FOOTBALL ASSOCIATION: $25k → 15%UNIVERSITY OF NORTH DAKOTA: $100k → 13%NATIONAL ALLIANCE ON MENTAL ILLNESS: $11k → 7%HDSA: $12k → 17%NAMI GREATER HOUSTON: $10k → 16%SEG FOUNDATION: $10k → 15%CAPITAL UNIVERSITY: $25k → 15%UNIVERSITY OF NORTH DAKOTA: $100k → 13%NATIONAL ALLIANCE ON MENTAL ILLNESS: $11k → 7%HDSA: $12k → 17%SEG FOUNDATION: $10k → 15%CAPITAL FOOTBALL GRIDIRON FUND: $25k → 15%UNIVERSITY OF NORTH DAKOTA: $30k → 13%NATIONAL ALLIANCE ON MENTAL ILLNESS: $11k → 7%HDSA: $11k → 17%UNITED WAY OF GREATER HOUSTON: $10k → 16%CAPITAL UNIVERSITY: $25k → 15%UNIVERSITY OF NORTH DAKOTA: $25k → 13%NATIONAL ALLIANCE ON MENTAL ILLNESS: $10k → 7%CLUBHOUSE INTERNATIONAL: $11k → 17%CAPITAL FOOTBALL ASSOCIATION: $10k → 15%UNIVERSITY OF NORTH DAKOTA: $25k → 13%NATIONAL ALLIANCE ON MENTAL ILLNESS: $10k → 7%CLUBHOUSE INTERNATIONAL: $11k → 17%CLUBHOUSE INTERNATIONAL: $10k → 17%CLUBHOUSE INTERNATIONAL: $10k → 17%CLUBHOUSE INTERNATIONAL: $10k → 17%HDSA: $10k → 17%HDSA: $10k → 17%CLUBHOUSE INTERNATIONAL: $10k → 17%HDSA: $10k → 17%CLUBHOUSE INTERNATIONAL: $10k → 17%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

ND
IL
MI
NY
OH
VA
SC
DC
OK
LA
TX
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.

98%of every dollar goes to organizations it has funded before.
$1.8M · 21 repeat orgs$45k to everyone else

Grantees it renews have grown median revenue +11% since the first grant, against +3% for those funded once.

21 repeat relationships: 15 still active in FY2026, 6 since wound down; 1 grantees were first funded in FY2026 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

21
4

Total granted

$1.8M
$20k

Median revenue growth · since first grant

+11%
+3%

Still filing today

43%
75%

New vs renewed · share of each year

In FY2026, 88% of grant dollars renewed an existing relationship; $25k went to new ones.

50%100%’17’18’19’20’21’22’23’26
RenewedFirst-time

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

’17’18’19’20’21’22’23’26
HealthPhilanthropyPublic BenefitEducationScience & TechEnvironmentOther
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

  • NN
    NAMI National
    7× · 2018–2026 · $78k · revenue +461%
  • NG
    NAMI GREATER HOUSTON
    6× · 2017–2022 · $68k · revenue +11%
  • SF
    SEG FOUNDATION
    7× · 2018–2026 · $55k · revenue +204%

Funded once

  • United Way of Greater Houston
    one grant, 2017 · $10k · revenue +5%
  • MH
    Mental Health America of Greater Houston Inc
    one grant, 2017 · $8k · revenue -4%
  • AG
    American Geosciences Institute
    one grant, 2023 · $1k · revenue +3%
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
National Association of Independent Colleges and Universities

The National Association of Independent Colleges and Universities (NAICU) serves as the unified voice for the 1,700 private, nonprofit colleges and universities in our nation. (continued on Schedule O)

—
2
Health and Environmental Sciences Institute

The health and environmental sciences institute (hesi) is a nonprofit institution whose mission is to engage scientists from academia, government, industry, nonprofit, and other research institutions to identify and resolve global health…

Science & Tech
3
Sigma Xi the Scientific Research Honor Society Inc

To enhance the health of the research enterprise, foster integrity in science and engineering and promote the public's understanding of science for the purpose of improving the human condition.

—
4
President and Fellows of Harvard College

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

Education
5
National Association of College and University Attorneys

To advance the practice of higher education attorneys for the benefit of the institutions they serve.

—
6
University of New Haven

The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…

Education
7
William Marsh Rice University

As a leading research university with a distinctive commitment to undergraduate education, Rice University aspires to path breaking research, unsurpassed teaching, and contributions to the betterment of our world. It seeks to fulfill this…

Education
8
Lehigh University

The university's goal in the coming decade is to advance learning through the integration of teaching, research and service to others. the core of this goal is to prepare graduates to engage with the world and lead lives of meaning. to do…

Education
9
American Academy of Neurology

The Academy's mission is to enhance member career fulfillment and promote brain health for all.

Community Improvement
10
National Association of Independent Schools Inc

As the largest association of independent schools, nais co-creates the future of education by uniting and empowering our community. we do this through thought leadership, research, creation and curation of resources, and direct…

—
11
Health Effects Institute

Health effects institute's mission is to conduct independent research to provide high-quality, impartial and relevant science on the health effects of air pollution. this is done by identifying the highest priority areas for health effect…

Health
12
American Geophysical Union

Agu's mission is to advance and support an inclusive community of earth and space scientists and partners dedicated to discovery and solutions to societal challenges. agu seeks to catalyze discovery and solutions to scientific and societal…

Science & Tech
How this is measured
The grantee most central to the portfolio’s shape is The Heritage Foundation; the most unlike its peers is Science and Environmental Policy Project. 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, 2017–2026.

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 2026, not grant rows in a single year, so this will not match the grant count on the cover. 13 of the 27 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)
1
Early backer (in before they grew)
13/13
Grantees still filing
9/13
Grew since first funded

Where the money sits, by cause and then by grantee

UNIVERSITY OF NORTH DAKOTA: $480,000 · OtherUNIVERSITY OF NORTH DAKOTAHDSA: $65,000 · OtherHDSAAAPG FOUNDATION: $60,750 · OtherAAPG FOUNDATIONCM TUCKER NURSING CENTER: $47,000 · OtherCM TUCKER NURSING CENTERTHE WORLD WAR II MUSEUM: $44,500 · OtherCAPITAL FOOTBALL ASSOCIATION: $40,250 · Other+10 more: $113,350 · Other+10 moreCAPITAL UNIVERSITY: $690,750 · EducationCAPITAL UNIVERSITY+1 more: $12,250 · EducationINTERNATIONAL CENTER FOR CLUBHOUSE DEVELOPMENT INC: $83,500 · HealthINTERNATIO…NAMI National: $77,500 · HealthNAMI Natio…Mental Health America of Greater Houston Inc: $7,500 · HealthNAMI GREATER HOUSTON: $68,000 · PhilanthropyUnited Way of Greater Houston: $10,000 · PhilanthropySEG FOUNDATION: $55,250 · Science & TechTHE HERITAGE FOUNDATION: $19,000 · Public BenefitTHE HEARTLAND INSTITUTE: $12,500 · Public BenefitScience and Environmental Policy Project: $5,500 · Environment
Other$850,850Education$703,000Health$168,500Philanthropy$78,000Science & Tech$55,250Public Benefit$31,500Environment$5,500

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

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetCAPITAL UNIVERSITY: $690,750 over 5y, 0.5% of budgetINTERNATIONAL CENTER FOR CLUBHOUSE DEVELOPMENT INC: $83,500 over 8y, 0.8% of budgetNAMI National: $77,500 over 7y, 0.1% of budgetNAMI GREATER HOUSTON: $68,000 over 6y, 1.9% of budgetSEG FOUNDATION: $55,250 over 7y, 3.0% of budgetHUNTINGTON'S DISEASE SOCIETY OF AMERICA INC: $24,500 over 2y, 0.1% of budgetTHE HERITAGE FOUNDATION: $19,000 over 5y, 0.0% of budgetTHE HEARTLAND INSTITUTE: $12,500 over 5y, 0.1% of budgetHILLSDALE COLLEGE: $12,250 over 5y, 0.0% of budgetUnited Way of Greater Houston: $10,000 over 1y, 0.0% of budgetMental Health America of Greater Houston Inc: $7,500 over 1y, 0.2% of budgetScience and Environmental Policy Project: $5,500 over 2y, 2.6% of budgetAmerican Geosciences Institute: $1,000 over 1y, 0.0% 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 CAPITAL UNIVERSITY ↗
  • Who funds INTERNATIONAL CENTER FOR CLUBHOUSE DEVELOPMENT INC ↗
  • Who funds NAMI National ↗
  • Who funds NAMI GREATER HOUSTON ↗
  • Who funds SEG FOUNDATION ↗
  • Who funds HUNTINGTON'S DISEASE SOCIETY OF AMERICA INC ↗
  • Who funds THE HERITAGE FOUNDATION ↗
  • Who funds THE HEARTLAND INSTITUTE ↗
  • Who funds HILLSDALE COLLEGE ↗
  • Who funds United Way of Greater Houston ↗
  • Who funds Mental Health America of Greater Houston Inc ↗
  • Who funds Science and Environmental Policy Project ↗
  • Who funds American Geosciences Institute ↗

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.

Shell USA Company Fou…Fidelity Investments …Amazonsmile Foundation
Shell USA Company FoundationTX12.3× affinity4 shared granteesties to 2 of 2Hover any node to trace its alignments.Compare side by side →

Open a dossier: Shell USA Company Foundation · 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 Tom and Carolyn Hamilton Family Fdn funds: left to right is the share of its income from government, bottom to top the share from Tom and Carolyn Hamilton Family Fdn. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%0%1%3%5%funder's share of their income ↑0%4%8%11%15%share of the org’s income from government →
    no gov moneyreceives it· size = income
    1get 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 · 0–15%
    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.
    05Through Plinth

    Warm introductions · Powered by PlinthPlus

    How do I get to Tom and Carolyn Hamilton Family Fdn?

    Find your warmest path to Tom and Carolyn Hamilton Family Fdn through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

    Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

    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 27 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 2026, released 2026. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

    Source object · view filing

    Play a game based on Tom and Carolyn Hamilton Family Fdn’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