· Private foundation
Tom and Carolyn Hamilton Family Fdn
Its FY2023 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2023.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2023
- Under $10k10 grants · $28k
- $10k–50k5 grants · $70k
- $50k–250k1 grant · $100k
| Recipient | Amount |
|---|---|
| UNIVERSITY OF NORTH DAKOTA | $100,000 |
| CAPITAL FOOTBALL ASSOCIATION | $25,000 |
| THE WORLD WAR II MUSEUM | $12,000 |
| HUNTINGTON'S DISEASE SOCIETY OF AME | $12,000 |
| NATIONAL ALLIANCE ON MENTAL ILLNESS | $11,000 |
| CLUBHOUSE INTERNATIONAL | $10,000 |
| THE HERITAGE FOUNDATION | $7,000 |
| CFACT | $3,000 |
| SCIENCE & ENVIRONMENTAL POLICY PROJ | $3,000 |
| HEARTLAND INSTITUTE | $3,000 |
| HILLSDALE COLLEGE | $2,500 |
| SEG FOUNDATION | $2,500 |
| AAPG FOUNDATION | $2,500 |
| RAINSBORO UNITED METHODIST CHURCH | $2,500 |
| Individual grant recipient | $1,250 |
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.
Dollar for dollar, your grants (FY17–23) land where the poverty rate runs at 15%, against an area that typically sits at 11%. 95% of your dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.
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
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.
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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +11% since the first grant, against +5% for the ones you funded once.
20 repeat relationships — 13 still active in FY2023, 7 since wound down; 2 grantees were first funded in FY2023 (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 FY2023, 93% of grant dollars renewed an existing relationship; $13k went to new ones.
Where new relationships form · theme of each grantee’s first grant
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
- NGNAMI GREATER HOUSTON6× · 2017–2022 · $68k · revenue +11%
- NNNAMI National6× · 2018–2023 · $65k · revenue +461%
- SFSEG FOUNDATION6× · 2018–2023 · $53k · revenue +204%
Funded once
United Way of Greater Houstonone grant, 2017 · $10k · revenue +5%- MHMental Health America of Greater Houston Incone grant, 2017 · $8k · revenue -4%
- JFJAMES F BYRNES SCHOLARSHIP FOUNDATIONone grant, 2017 · $1k
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
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.
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)
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…
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.
To advance the practice of higher education attorneys for the benefit of the institutions they serve.
The Academy's mission is to enhance member career fulfillment and promote brain health for all.
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…
Undergraduate, graduate, and professional education and research across a broad array of academic domains.
The National Academy of Public Administration is an independent, 501(c)(3) nonprofit, non partisan Organization established in 1967 and chartered by Congress in 1984. See Schedule O
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…
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…
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…
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…
For reference, the grantee most central to the portfolio’s shape is The Heritage Foundation and 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.
13 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 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 13 of the 26 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.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
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 CAPITAL UNIVERSITY ↗
- Who funds INTERNATIONAL CENTER FOR CLUBHOUSE DEVELOPMENT INC ↗
- Who funds NAMI GREATER HOUSTON ↗
- Who funds NAMI National ↗
- Who funds SEG FOUNDATION ↗
- Who funds THE HERITAGE FOUNDATION ↗
- Who funds HUNTINGTON'S DISEASE SOCIETY OF AMERICA INC ↗
- Who funds United Way of Greater Houston ↗
- Who funds HILLSDALE COLLEGE ↗
- Who funds THE HEARTLAND INSTITUTE ↗
- Who funds Mental Health America of Greater Houston Inc ↗
- Who funds Science and Environmental Policy Project ↗
- Who funds American Geosciences Institute ↗
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.
Open a dossier: Shell USA Company Foundation · 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 Tom and Carolyn Hamilton Family Fdn 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.
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.
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.