· Private foundation
Hamill Family Foundation
Its FY2024 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 FY2020–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k79 grants · $164k
- $10k–50k18 grants · $276k
- $50k–250k12 grants · $1.6M
- $250k+23 grants · $48M
| Recipient | Amount |
|---|---|
| Hamill Charitable Trust - NT 03-18125 | $10,862,968 |
| The Corwith Fund - NT 03-18125 | $10,862,941 |
| Carwythen Charitable Trust - NT 03-18125 | $10,862,038 |
| Openlands | $2,400,000 |
| The Corwith Fund - NT 03-03604 | $1,986,052 |
| Hamill Charitable Trust - NT 03-03604 | $1,986,052 |
| Carwythen Charitable Trust - NT 03-03604 | $1,986,052 |
| Environmental Law & Policy Center | $1,050,000 |
| The Conservation Foundation | $1,000,000 |
| Morton Arboretum | $668,000 |
| Jo Daviess Conservation Foundation | $643,911 |
| Carwythen Charitable Trust - NT 03-18125 - Cash | $376,677 |
| The Corwith Fund - NT 03-18125 - Cash | $375,758 |
| Hamill Charitable Trust - NT 03-18125 - Cash | $375,431 |
| The Corwith Fund | $340,912 |
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 (FY20–24) land where the poverty rate runs at 13%, against an area that typically sits at 9%. 84% 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 +41% since the first grant, against +33% for the ones you funded once.
109 repeat relationships — 80 still active in FY2024, 29 since wound down; 17 grantees were first funded in FY2024 (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 FY2024, 15% of grant dollars renewed an existing relationship; $42M 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
- OOPENLANDS5× · 2020–2024 · $7.6M · revenue +44%
Chicago Zoological Society5× · 2020–2024 · $5.4M · revenue +80%- TMTHE MORTON ARBORETUM5× · 2020–2024 · $4.0M · revenue +100%
Funded once
- LHLittle Home Church by the Waysideone grant, 2020 · $100k
- YUYALE UNIVERSITYone grant, 2022 · $25k
- ASAGRICULTURAL STEWARDSHIP ASSN INCone grant, 2021 · $25k · revenue -16%
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.
Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.
The wildlands trust works throughout southeastern massachusetts to conserve and permanently protect native habitats, farmland, and lands of high ecologic and scenic value that serve to keep our communities healthy and our residents…
Preserving and enhancing the habitat of wildlife, such as sandhill cranes, waterfowl, raptors, which habitat expenses are supported by agricultural activities.
Cascadia wildlands defends and restores cacasia's wild ecosystems in the forests,in the courts, and in the streets. we envision vast old-growth forests, rivers full of wild salmon, wolves howling in the backcountry, a stable climate, and…
The organization's mission is to conserve and promote new england's native plants to ensure healthy, biologically diverse landscapes.
Dedicated to protecting the world's natural environment on behalf of the public by serving as a public interest law firm. refer to schedule o, part iii, line 4a, for list of litigated cases or advocacy work.
To protect wisconsin's lands, waters, and wildlife by providing funding, leading partnerships, and connecting all people with nature.
This member-supported organization protects and restores iowa's land, water and wildlife for future generations. priorities include permanent land protection, promotion of improved land management and bringing new conservation…
To sustain, restore, and enhance the nation's fish, wildlife, plants, and habitats.
Eastern national promotes the public's understanding and support of america's national parks and other public trust partners by providing quality educational experiences, products and services.
Wetlands america trust, inc. is a nonprofit organization formed in 1985 to expand ducks unlimited, inc's mission to provide leadership in the protection of the natural balance of wetlands ecosystems ensuring the future viability of…
Conservation legacy engages future leaders who protect, restore, and enhance our nation's lands through community-based service.in 2024, conservation legacy engaged 2,524 participants who completed over 1.5 million service hours on public…
For reference, the grantee most central to the portfolio’s shape is National Forest Foundation and the most unlike its peers is Carwythen Charitable Trust Dated 8/7/2019. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 38 years old; the field is 20. You back the established end — and your money leans older still.
The field is 18% startups (under 5 years old) — 2% of your grantees by number, and just 3% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 12% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
148 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. 148 of the 184 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 OPENLANDS ↗
- Who funds Chicago Zoological Society ↗
- Who funds THE MORTON ARBORETUM ↗
- Who funds ENVIRONMENTAL LAW AND POLICY CENTER OF THE MIDWEST ↗
- Who funds THE CONSERVATION FOUNDATION ↗
- Who funds JO DAVIESS CONSERVATION FOUNDATION INC ↗
- Who funds FIELD MUSEUM OF NATURAL HISTORY ↗
- Who funds TETON REGIONAL LAND TRUST INC ↗
- Who funds FIDELITY INVESTMENTS CHARITABLE GIFT FUND ↗
- Who funds THE NATURE CONSERVANCY ↗
- Who funds NAPLES ZOO INC ↗
- Who funds CARWYTHEN CHARITABLE TRUST DATED 8/7/2019 ↗
- Who funds NATURAL LAND INSTITUTE ↗
- Who funds INTERNATIONAL CRANE FOUNDATION INC ↗
- Who funds FRIENDS OF NACHUSA GRASSLANDS ↗
- Who funds The Corwith Fund ↗
- Who funds Hamill Charitable Trust ↗
- Who funds PRAIRIE STATE CONSERVATION COALITION ↗
- Who funds AMERICAN HORSE TRIALS FOUNDATION INC ↗
- Who funds NATIONAL PARKS CONSERVATION ASSOCIATION ↗
- Who funds NATIONAL FOREST FOUNDATION ↗
- Who funds THE CONSERVANCY OF SOUTHWEST FLORIDA ↗
- Who funds BARRINGTON AREA CONSERVATION TRUST INC ↗
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: Illinois Clean Energy Community Foundation · S & E Bramsen Foundation · The Nature Conservancy · Gaylord and Dorothy Donnelley Foundation · The Corwith Fund · Grand Victoria Foundation · Land Trust Alliance Inc · The Chicago Community Trust · Ranch Spur Charitable Trust · Yellow-Crowned Foundation · Marin Community Foundation · National Fish and Wildlife 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 Hamill Family 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.
- Vermont Land Trust Inc — 42% of income from government
- World Learning Inc — 39% of income from government
- The Green Mountain Club Inc Debonis — 17% of income from government
- Northern Forest Canoe Trail Inc — 4% of income from government
- Naples Botanical Garden Inc — 3% of income from government
- Artists for Humanity Inc — 2% of income from government
- The Trustees of Reservations — 2% of income from government
- American Physical Society — 1% of income from government
- Appalachian Mountain Club — 1% of income from government
- President and Fellows of Middlebury College — 1% of income from government
- Partners in Health a Nonprofit Corporation — 0% of income from government
- Period Inc — 0% of income from government
- Choate Rosemary Hall Foundation Incorporated — 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 Hamill Family Foundation?
Find your warmest path to Hamill Family 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.