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Duncan Louis Stewart Foundation Inc at a glanceAlso receives grants: funding profile →

· Private foundation

Duncan Louis Stewart Foundation Inc

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.

$125k
Granted FY2025still arriving
4
Grants FY2025still arriving
3
States reached
$100k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0196% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2018 to 2025.

Philanthropy$267kEnvironment$226kAnimals$12kArts & Culture$10kEducation$7kOther$0
02FY2025 · 4 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k2 grants · $10k
  • $10k–50k1 grant · $15k
  • $50k–250k1 grant · $100k
$15,000
Median grant
3
States reached
$2.3M
Total assets
Largest grants
RecipientAmount
Individual grant recipient$100,000
CHARITIES AID FOUNDATION AMERICAN DONOR FUND$15,000
FRIENDS OF THE ENVIRONMENT$5,000
WISCONSIN'S GREEN FIRE$5,000
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.

US giving: 48% of grant dollars ($296k). The need read here covers only this US portion; the 52% that went abroad ($326k) is mapped below.

show:

Dollar for dollar, its grants (FY18–25) land where the poverty rate runs at 13%, against an area that typically sits at 8%. 95% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 8%AMERICAN FRIENDS OF WINCHESTER COLLEGE: $7k → 17%WORLD WILDLIFE FUND: $100k → 14%FRIENDS OF THE ENVIRONMENT: $5k → 11%WISCONSIN'S GREEN FIRE: $10k → 10%CABLE NATURAL HISTORY MUSEUM: $10k → 11%WISCONSIN'S GREEN FIRE: $5k → 12%WILD SALMON CENTER: $10k → 12%JANE GOODALL INSTITUTE: $3k → 6%CONSERVATION ALLIES: $3k → 6%FAUNA & FLORA: $100k → 14%FRIENDS OF THE ENVIRONMENT: $5k → 11%WISCONSIN'S GREEN FIRE: $5k → 12%WILD SALMON CENTER: $10k → 12%JANE GOODALL INSTITUTE: $3k → 6%FRIENDS OF THE ENVIRONMENT: $4k → 11%WISCONSIN'S GREEN FIRE: $5k → 12%JANE GOODALL INSTITUTE: $3k → 6%WISCONSIN'S GREEN FIRE: $5k → 12%JANE GOODALL INSTITUTE: $3k → 6%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.

Beyond the US: 52% of all-years giving ($326k)

2 countries, by the recipient’s country on the filing.

grant dollars sentlessmore
United Kingdom$267k · 5 grants
Bahamas$59k · 3 grants
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. International giving is mapped by the recipient’s country from the same 990 filings; comparable need data isn’t available at that grain.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

65%of every dollar goes to organizations it has funded before.
$402k · 6 repeat orgs$220k to everyone else

Grantees it renews have grown median revenue +93% since the first grant, against +43% for those funded once.

6 repeat relationships: 3 still active in FY2025, 3 since wound down; 1 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

6
4

Total granted

$402k
$120k

Median revenue growth · since first grant

+93%
+43%

Still filing today

67%
100%

New vs renewed · share of each year

In FY2025, 20% of grant dollars renewed an existing relationship; $100k went to new ones.

50%100%’18’20’21’22’23’24’25
RenewedFirst-time

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

’18’20’21’22’23’24’25
EnvironmentAnimalsArts & CultureEducationOther
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

  • WG
    WISCONSIN'S GREEN FIRE INCORPORATED
    5× · 2021–2025 · $30k · revenue +58%
  • WILD SALMON CENTER
    2× · 2020–2021 · $20k · revenue +166%
  • JG
    JANE GOODALL INSTITUTE FOR WILDLIFE RESEARCH EDUCATION AND CONSERVATION
    4× · 2018–2022 · $12k · revenue +93%

Funded once

  • WORLD WILDLIFE FUND INCgraduated
    one grant, 2018 · $100k · revenue +43%
  • CN
    CABLE NATURAL HISTORY MUSEUM INC
    one grant, 2020 · $10k · revenue -31%
  • TA
    THE AMERICAN FRIENDS OF WINCHESTER COLLEGE INC
    one grant, 2023 · $7k · revenue +1%
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
Wisconsin Wildlife Federation Inc

The wisconsin wildlife federation has a dual mission to engage in conservation education and to advocate for sound conservation policy.

Environment
2
Wildlife Protection Solutions

To protect endangered species.

Animals
3
Wilderness Conservation Foundation
Environment
4
Wildlife Conservation Global Inc

Wildlife conservation global, inc. operates the okapi conservation project (ocp) which works in the democratic republic of the congo with the institute in congo for the conservation of nature (iccn) and local communities throughout the…

Animals
5
Rainforest Trust

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

International
6
Wild Earth Allies Inc

Our mission is to protect vital areas of our natural world for the benefit of wildlife, habitats, and people by inspiring collaborative action. Our vision is a world where wildlife and people flourish in healthy ecosystems that sustain us…

Environment
7
Wildlife Conservation Network Inc

Connect conservationists and supporters, deploy resources to the field, provide conservationists with tools and support they need to succeed.

Animals
8
Wildcoast

The mission of wildcoast is to conserve coastal and marine ecosystems and address climate change through natural solutions. our staff is dedicated to conserving threatened and endangered coastlines and wildlife in california and mexico.…

Environment
9
Int'l Union for Conservation of Nature & Natural Resources - Us

Iucn-us fund builds bridges between us donors and iucn by catalyzing, accelerating, funding and promoting iucn's work - conserving nature and natural resources in the united states and throughout the world.

Environment
10
Wildlife Ecology Institute

Advance wildlife management and conservation through applied research and education activities.

Environment
11
Conservation International Foundation

Ci works to spotlight and secure the critical benefits that nature provides to humanity.

Environment
12
Waterbird Society

The waterbird society is composed of biologists, researchers, conservationists, students, and others interested in the behavior, ecology, and conservation of waterbirds. the organization is administered by officers and council members…

—
How this is measured
The grantee most central to the portfolio’s shape is Wisconsin's Green Fire Incorporated; the most unlike its peers is Conservation Allies. 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

8 grantees tracked through their own filings, 2017–2025.

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 2025, not grant rows in a single year, so this will not match the grant count on the cover. 8 of the 11 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)
2
Early backer (in before they grew)
8/8
Grantees still filing
6/8
Grew since first funded

Where the money sits, by cause and then by grantee

CHARITIES AID FOUNDATION AMERICAN DONOR FUND: $266,700 · OtherCHARITIES AID FOUNDATION AMERICAN DONOR FUNDIndividual grant recipient: $100,000 · OtherIndividual grant recipientFRIENDS OF THE ENVIRONMENT: $59,400 · OtherFRIENDS OF THE ENVIRONMENTWORLD WILDLIFE FUND INC: $100,000 · EnvironmentWORLD WILDLIFE FUND INCWISCONSIN'S GREEN FIRE INCORPORATED: $30,000 · EnvironmentWISCONSIN'S GREEN FIRE INC…FRIENDS OF THE ENVIRONMENT INC: $14,000 · EnvironmentFRIENDS OF THE ENVIRONMENT…+1 more: $2,500 · EnvironmentWILD SALMON CENTER: $20,000 · AnimalsJANE GOODALL INSTITUTE FOR WILDLIFE RESEARCH EDUCATION AND CONSERVATION: $12,000 · AnimalsCABLE NATURAL HISTORY MUSEUM INC: $10,000 · Arts & CultureTHE AMERICAN FRIENDS OF WINCHESTER COLLEGE INC: $7,000 · Education
Other$426,100Environment$146,500Animals$32,000Arts & Culture$10,000Education$7,000

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 budgetWORLD WILDLIFE FUND INC: $100,000 over 1y, 0.0% of budgetWISCONSIN'S GREEN FIRE INCORPORATED: $30,000 over 5y, 2.7% of budgetWILD SALMON CENTER: $20,000 over 2y, 0.1% of budgetFRIENDS OF THE ENVIRONMENT INC: $14,000 over 3y, 0.5% of budgetJANE GOODALL INSTITUTE FOR WILDLIFE RESEARCH EDUCATION AND CONSERVATION: $12,000 over 4y, 0.0% of budgetCABLE NATURAL HISTORY MUSEUM INC: $10,000 over 1y, 1.2% of budgetTHE AMERICAN FRIENDS OF WINCHESTER COLLEGE INC: $7,000 over 1y, 0.0% of budgetCONSERVATION ALLIES: $2,500 over 1y, 0.2% 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.

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 set of overlaps that mostly run through this funder rather than between each other.

Fidelity Investments …
Fidelity Investments Charitable Gift FundMA5.3× affinity4 shared granteesties to 0 of 0Hover any node to trace its alignments.Compare side by side →

Open a dossier: Fidelity Investments Charitable Gift Fund

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 Duncan Louis Stewart Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from Duncan Louis Stewart Foundation Inc. 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%25%50%75%100%share of the org’s income from government →median 49%
  • Wild Salmon Center: 49% of 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
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 Duncan Louis Stewart Foundation Inc?

Find your warmest path to Duncan Louis Stewart Foundation Inc 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 11 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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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