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· 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.

$50M
Granted FY2024still arriving
132
Grants FY2024still arriving
20
States reached
$11M
Largest
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2024.

Philanthropy$44MEnvironment$27MAnimals$9.5MArts & Culture$3.7MEducation$443kRecreation & Sports$420kReligion$100kInternational$99kOther$0
02FY2024 · 132 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k79 grants · $164k
  • $10k–50k18 grants · $276k
  • $50k–250k12 grants · $1.6M
  • $250k+23 grants · $48M
$5,000
Median grant
20
States reached
$0
Total assets
Largest grants
RecipientAmount
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
Hamill Charitable Trust - NT 03-03604$1,986,052
The Corwith Fund - 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
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 (FY20–24) land where the poverty rate runs at 13%, against an area that typically sits at 9%. 84% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 9%Teton Regional Land Trust: $500k → 7%The Conservation Foundation: $1.0M → 7%Galena-Jo Daviess Co Historical Society: $1.0M → 9%Nature Conservancy of Illinois: $1.0M → 14%Fidelity Investments Charitable Gift Fund: $720k → 16%Teton Regional Land Trust: $500k → 7%The Conservation Foundation: $500k → 7%Galena-Jo Daviess Co Historical Society: $500k → 9%Nature Conservancy of Illinois: $1.0M → 14%The Nature Conservancy: $1.0M → 7%The Conservation Foundation: $500k → 7%Naples Zoo: $775k → 10%Jo Daviess Conservation Foundation: $644k → 9%WTTW Channel 11: $625k → 14%WTTW Channel 11: $625k → 14%WTTW Channel 11: $500k → 14%WTTW Channel 11: $500k → 14%Morton Arboretum: $1.0M → 7%Morton Arboretum: $668k → 7%Morton Arboretum: $666k → 7%Hamill Charitable Trust - NT 03-18125: $10.9M → 14%Morton Arboretum: $666k → 7%The Corwith Fund - NT 03-18125: $10.9M → 14%Morton Arboretum: $500k → 7%Carwythen Charitable Trust - NT 03-18125: $10.9M → 14%Morton Arboretum: $500k → 7%The Corwith Fund - NT 03-03604: $2.0M → 14%Hamill Charitable Trust - NT 03-03604: $2.0M → 14%Carwythen Charitable Trust - NT 03-03604: $2.0M → 14%Carwythen Charitable Trust - NT 03-18125 - Cash: $377k → 14%The Corwith Fund - NT 03-18125 - Cash: $376k → 14%Hamill Charitable Trust - NT 03-18125 - Cash: $375k → 14%Environmental Law & Policy Center: $1.1M → 14%Environmental Law & Policy Center: $350k → 14%Environmental Law & Policy Center: $350k → 14%Openlands: $2.4M → 14%Openlands: $1.0M → 14%Openlands: $900k → 14%Openlands: $500k → 14%Openlands: $500k → 14%Openlands: $500k → 14%Field Museum of Natural History: $1.0M → 14%Openlands: $500k → 14%Chicago Zoological Society: $1.0M → 14%Chicago Zoological Society: $1.0M → 14%Chicago Zoological Society: $1.0M → 14%Chicago Zoological Society: $1.0M → 14%Chicago Zoological Society: $1.0M → 14%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

ME
VT
NH
WA
ID
MT
MN
IL
WI
NY
MA
OR
WY
NJ
CT
RI
CA
CO
MO
KY
VA
MD
NM
NC
SC
DC
HI
GA
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.

48%of every dollar goes to organizations it has funded before.
$40M · 109 repeat orgs$43M to everyone else

Grantees it renews have grown median revenue +41% since the first grant, against +32% for those 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

Re-uppedFunded once

Organizations

109
52

Total granted

$40M
$251k

Median revenue growth · since first grant

+41%
+32%

Still filing today

87%
85%

New vs renewed · share of each year

In FY2024, 15% of grant dollars renewed an existing relationship; $42M went to new ones.

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

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

’20’21’22’23’24
EnvironmentEducationAnimalsArts & CultureHealthPhilanthropyOther
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

  • O
    OPENLANDS
    5× · 2020–2024 · $7.6M · revenue +44%
  • Chicago Zoological Society
    5× · 2020–2024 · $5.4M · revenue +80%
  • TM
    THE MORTON ARBORETUM
    5× · 2020–2024 · $4.0M · revenue +100%

Funded once

  • LH
    Little Home Church by the Wayside
    one grant, 2020 · $100k
  • YU
    YALE UNIVERSITY
    one grant, 2022 · $25k
  • AS
    AGRICULTURAL STEWARDSHIP ASSN INC
    one grant, 2021 · $25k · revenue -16%
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
Rainforest Trust

Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.

International
2
Wildlands Trust Inc

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…

Environment
3
Conservation Farms & Ranches

Preserving and enhancing the habitat of wildlife, such as sandhill cranes, waterfowl, raptors, which habitat expenses are supported by agricultural activities.

Housing & Shelter
4
Cascadia Wildlands

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…

Environment
5
Native Plant Trust Inc

The organization's mission is to conserve and promote new england's native plants to ensure healthy, biologically diverse landscapes.

Environment
6
Washington Forest Law Center

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.

—
7
Natural Resources Foundation of

To protect wisconsin's lands, waters, and wildlife by providing funding, leading partnerships, and connecting all people with nature.

—
8
Iowa Natural Heritage Foundation

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…

Environment
9
National Fish and Wildlife Foundation

To sustain, restore, and enhance the nation's fish, wildlife, plants, and habitats.

Animals
10
Eastern National

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.

Recreation & Sports
11
Wetlands America Trust Inc

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…

Environment
12
Conservation Legacy

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…

Youth Development
How this is measured
The grantee most central to the portfolio’s shape is National Forest Foundation; 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.
04the grantee network

148 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. 148 of the 184 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.

3
Load-bearing (≥25% of a budget)
25
Early backer (in before they grew)
148/148
Grantees still filing
112/148
Grew since first funded

Where the money sits, by cause and then by grantee

Hamill Charitable Trust - NT 03-18125: $10,862,968 · OtherHamill Charitable Trust - NT 03-18125The Corwith Fund - NT 03-18125: $10,862,941 · OtherThe Corwith Fund - NT 03-18125Carwythen Charitable Trust - NT 03-18125: $10,862,038 · OtherCarwythen Charitable Trust - NT 03-18125OPENLANDS: $7,642,000 · OtherOPENLANDSWTTW Channel 11: $2,250,000 · OtherNature Conservancy of Illinois: $2,250,000 · OtherThe Corwith Fund - NT 03-03604: $1,986,052 · OtherCarwythen Charitable Trust - NT 03-03604: $1,986,052 · OtherHamill Charitable Trust - NT 03-03604: $1,986,052 · Other+82 more: $6,567,336 · Other+82 moreTHE MORTON ARBORETUM: $4,050,000 · EnvironmentTHE MORTON ARBORETUMENVIRONMENTAL LAW AND POLICY CENTER OF THE MIDWEST: $2,879,000 · EnvironmentENVIRONMENTAL LAW AN…THE CONSERVATION FOUNDATION: $2,171,000 · EnvironmentTHE CONSERVATION FOU…JO DAVIESS CONSERVATION FOUNDATION INC: $1,798,911 · EnvironmentJO DAVIESS CONSERVAT…TETON REGIONAL LAND TRUST INC: $1,564,500 · EnvironmentTETON REGIONAL LAND …NATURAL LAND INSTITUTE: $755,000 · EnvironmentFRIENDS OF NACHUSA GRASSLANDS: $625,000 · Environment+45 more: $1,263,800 · Environment+45 moreChicago Zoological Society: $5,389,994 · AnimalsChicago Z…NAPLES ZOO INC: $948,596 · AnimalsNAPLES ZO…INTERNATIONAL CRANE FOUNDATION INC: $753,250 · AnimalsINTERNATI…+8 more: $59,000 · AnimalsFIELD MUSEUM OF NATURAL HISTORY: $1,790,000 · Arts & Culture+9 more: $160,500 · Arts & CultureFIDELITY INVESTMENTS CHARITABLE GIFT FUND: $1,422,382 · Community Improvement+3 more: $46,000 · Community ImprovementCARWYTHEN CHARITABLE TRUST DATED 8/7/2019: $758,655 · PhilanthropyThe Corwith Fund: $480,343 · PhilanthropyGRAND TETON NATIONAL PARK FOUNDATION: $82,500 · PhilanthropyBARRINGTON AREA COMM FOUNDATION INC: $75,000 · Philanthropy+5 more: $28,000 · PhilanthropyAMERICAN HORSE TRIALS FOUNDATION INC: $220,000 · Recreation & SportsNATIONAL FOREST FOUNDATION: $200,000 · Recreation & SportsUNITED STATES EQUESTRIAN TEAM FOUNDATION INC: $90,000 · Recreation & SportsFOX RIVER VALLEY PONY CLUB: $20,000 · Recreation & Sports+3 more: $10,500 · Recreation & Sports
Other$57,255,439Environment$15,107,211Animals$7,150,840Arts & Culture$1,950,500Community Improvement$1,468,382Philanthropy$1,424,498Recreation & Sports$540,500

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 budgetOPENLANDS: $7,642,000 over 5y, 24% of budgetChicago Zoological Society: $5,389,994 over 5y, 3.4% of budgetTHE MORTON ARBORETUM: $4,050,000 over 5y, 3.1% of budgetENVIRONMENTAL LAW AND POLICY CENTER OF THE MIDWEST: $2,879,000 over 5y, 9.6% of budgetTHE CONSERVATION FOUNDATION: $2,171,000 over 5y, 25% of budgetJO DAVIESS CONSERVATION FOUNDATION INC: $1,798,911 over 5y, 32% of budgetFIELD MUSEUM OF NATURAL HISTORY: $1,790,000 over 5y, 2.1% of budgetTETON REGIONAL LAND TRUST INC: $1,564,500 over 5y, 21% of budgetFIDELITY INVESTMENTS CHARITABLE GIFT FUND: $1,422,382 over 5y, 0.0% of budgetTHE NATURE CONSERVANCY: $1,000,000 over 1y, 0.1% of budgetNAPLES ZOO INC: $948,596 over 2y, 10% of budgetCARWYTHEN CHARITABLE TRUST DATED 8/7/2019: $758,655 over 1y, 5.4% of budgetNATURAL LAND INSTITUTE: $755,000 over 5y, 21% of budgetINTERNATIONAL CRANE FOUNDATION INC: $753,250 over 5y, 1.7% of budgetFRIENDS OF NACHUSA GRASSLANDS: $625,000 over 5y, 35% of budgetThe Corwith Fund: $480,343 over 1y, 3.3% of budgetHamill Charitable Trust: $480,340 over 1y, 3.4% of budgetPRAIRIE STATE CONSERVATION COALITION: $230,000 over 5y, 35% of budgetAMERICAN HORSE TRIALS FOUNDATION INC: $220,000 over 5y, 2.2% of budgetNATIONAL PARKS CONSERVATION ASSOCIATION: $205,000 over 5y, 0.2% of budgetNATIONAL FOREST FOUNDATION: $200,000 over 2y, 0.4% of budgetTHE CONSERVANCY OF SOUTHWEST FLORIDA: $145,000 over 4y, 0.8% of budgetBARRINGTON AREA CONSERVATION TRUST INC: $125,500 over 5y, 10% of budgetTHE HOTCHKISS SCHOOL: $125,000 over 5y, 0.0% of budgetTHE ADIRONDACK COUNCIL INC: $124,000 over 5y, 1.4% of budgetEQUINE LAND CONSERVATION RESOURCE: $115,000 over 5y, 19% of budgetUNITED STATES EQUESTRIAN TEAM FOUNDATION INC: $90,000 over 5y, 0.5% of budgetLAND TRUST ALLIANCE INC: $89,000 over 5y, 0.4% of budgetUNIVERSITY OF OREGON FOUNDATION: $84,000 over 2y, 0.0% of budgetGRAND TETON NATIONAL PARK FOUNDATION: $82,500 over 5y, 0.5% of budgetNATURAL RESOURCES DEFENSE COUNCIL INC: $81,000 over 5y, 0.0% of budgetNAPLES BOTANICAL GARDEN INC: $80,000 over 4y, 0.2% of budgetBARRINGTON AREA COMM FOUNDATION INC: $75,000 over 5y, 3.7% of budgetThe Bhutan Foundation: $75,000 over 5y, 0.8% of budgetMASTERS SCHOOL: $67,000 over 5y, 0.1% of budgetBALANCED ROCK FOUNDATION: $66,000 over 5y, 14% of budgetNORTHERN FOREST CANOE TRAIL INC: $52,000 over 5y, 9.3% of budgetCITIZENS FOR CONSERVATION INC: $50,000 over 5y, 1.6% of budgetCOFAN SURVIVAL FUND INC: $50,000 over 5y, 6.0% of budgetTOMPKINS CONSERVATION: $45,000 over 5y, 0.2% of budgetFRIENDS OF BARRINGTON'S WHITE HOUSE: $40,000 over 4y, 2.3% of budgetFox River Valley Hound Heritage Foundation: $38,500 over 5y, 13% of budgetENVIRONMENTAL DEFENSE FUND INCORPORATED: $34,000 over 5y, 0.0% of budgetEARTHJUSTICE: $32,000 over 5y, 0.0% of budgetNATUREBRIDGE: $25,800 over 5y, 0.1% of budgetDefenders of Wildlife: $25,000 over 5y, 0.0% of budgetELGIN ACADEMY: $25,000 over 3y, 0.1% of budgetAGRICULTURAL STEWARDSHIP ASSN INC: $25,000 over 1y, 0.6% 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 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 ↗

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.

Illinois Clean Energy Community FoundationIL27.2× affinity11 shared granteesties to 10 of 11Hover any node to trace its alignments.Compare side by side →

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

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 Hamill Family Foundation funds: left to right is the share of its income from government, bottom to top the share from Hamill Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 140%3%10%23%40%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 2%
  • 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
no gov moneyreceives it· size = income
14get no government money at all
24report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
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 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.

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 184 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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