· Private foundation
Drs Tom and Lowell Williams 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.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k5 grants · $18k
- $10k–50k2 grants · $30k
| Recipient | Amount |
|---|---|
| The CMT Research Foundation | $18,000 |
| Epilepsy Foundation | $12,000 |
| New England Public Media | $6,000 |
| Springfield Boys and Girls | $6,000 |
| Carls Family YMCA | $3,000 |
| Drummond Island Historical Society | $3,000 |
| Individual grant recipient | $190 |
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.
Your human-services grants (FY18–23, $62k) land where the poverty rate runs at 14%, against an area that typically sits at 12%. 100% of those 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 +46% since the first grant, against +18% for the ones you funded once.
9 repeat relationships — 4 still active in FY2025, 5 since wound down; 3 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, 75% of grant dollars renewed an existing relationship; $12k 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
- CRCMT Research Foundation Inc5× · 2021–2025 · $41k · revenue ×40
- ANAmerican National Red Cross & Its Constituent Chapters and Branches3× · 2018–2020 · $36k · revenue +9%
WOUNDED WARRIOR PROJECT INC5× · 2018–2023 · $24k · revenue +46%
Funded once
- COCITY OF GRANDVIEW HEIGHTSone grant, 2017 · $305k
- AFALZHEIMER'S FOUNDATION OF AMERICA INCone grant, 2024 · $6k · revenue 0%
- YOYMCA of Greater Springfield Incone grant, 2024 · $6k · revenue -3%
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.
As the parent entity of a blended health organization, highmark health seeks to improve the health and well-being of the people and communities it serves by providing affordable, accessible and high-quality healthcare.
National public radio, inc. ("npr") works collaboratively with member public radio station licensees ("member stations") to create a more informed public, one that is challenged and invigorated by a deeper understanding and appreciation of…
Mass general brigham health plan's mission is to promote the health and wellness of our members, and to help ensure equitable, affordbale health care for the diverse communities we serve.
The Academy's mission is to enhance member career fulfillment and promote brain health for all.
Sfn's mission is to: 1. advance the understanding of the brain and the nervous system by bringing together scientists of all segments of neuroscience, by facilitating the integration of research directed at all levels of biological…
The npr foundation ("foundation") is organized and operated exclusively for the benefit of its sole supported organization, national public radio, inc. ("npr inc."). the foundation supports npr inc. through various activities such as…
Gsa serves an international community of scientists who use genetics to make new discoveries and improve lives. we advance biological research by supporting professional development of scientists, by communicating advances and fostering…
To be the leading voice of medicine to make minnesota the healthiest state and the best place to practice.
Visit philadelphia is our name and our mission. as the region's official tourism marketing agency, we build greater philadelphia's image, drive visitation and boost the economy.
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
See schedule oustelecom exists to ensure members can compete, grow and thrive to build a world where families, enterprises and communities are connected through the power of broadband.our member companies have committed a considerable…
Phrma's mission is to conduct effective advocacy for public policies that encourage the discovery of important, new medicines for patients by biopharmaceutical research companies.
For reference, the grantee most central to the portfolio’s shape is Cleveland Society for the Blind and the most unlike its peers is Grandview Heights Band Parents Association. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
15 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. 15 of the 22 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 CMT Research Foundation Inc ↗
- Who funds American National Red Cross & Its Constituent Chapters and Branches ↗
- Who funds WOUNDED WARRIOR PROJECT INC ↗
- Who funds EPILEPSY FOUNDATION OF AMERICA ↗
- Who funds Little Traverse Conservancy Inc ↗
- Who funds ALZHEIMER'S FOUNDATION OF AMERICA INC ↗
- Who funds YMCA of Greater Springfield Inc ↗
- Who funds SPRINGFIELD BOYS & GIRLS CLUB INC ↗
- Who funds NEW ENGLAND PUBLIC MEDIA INC ↗
- Who funds CLEVELAND SOCIETY FOR THE BLIND ↗
- Who funds PELOTONIA ↗
- Who funds GRANDVIEW HEIGHTS BAND PARENTS ASSOCIATION ↗
- Who funds Drummond Island Tourism Association ↗
- Who funds Grandview Hts High School Alumni Assn ↗
- Who funds OHIO HISTORY CONNECTION ↗
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: Vanguard Charitable Endowment Program · American Online Giving Foundation Inc · 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 Drs Tom and Lowell Williams 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, a single department, or state — and drag the year to watch it move.
- Epilepsy Foundation of America — 22% of income from government
- Springfield Boys & Girls Club Inc — 1% of income from government
- New England Public Media Inc — 0% of income from government
- Wounded Warrior Project Inc — 0% of income from government
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 Drs Tom and Lowell Williams Foundation?
Find your warmest path to Drs Tom and Lowell Williams Foundation 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.