· Private foundation
The 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.
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 $10k7 grants · $12k
- $10k–50k2 grants · $40k
- $50k–250k2 grants · $201k
| Recipient | Amount |
|---|---|
| CHARITIES AID FOUNDATION AMERICAN DONOR FUND | $101,000 |
| RAINFOREST TRUST | $100,000 |
| SAVING NATURE | $30,000 |
| MAYO CLINIC | $10,000 |
| AMERICAN FRIENDS OF CANADIAN NATURE | $3,000 |
| CABLE NATURAL HISTORY MUSEUM | $2,000 |
| HADLEY SCHOOL FOR THE BLIND | $2,000 |
| PAMS FOUNDATION INC | $2,000 |
| NORTH SHORE COUNTRY DAY SCHOOL | $1,000 |
| NORTHWESTERN UNIVERSITY FILM DEPARTMENT | $1,000 |
| NORTHSHORE HOSPITALS FOUNDATION | $1,000 |
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 US giving — 65% of grant dollars ($1.1M). The need read here covers only this US portion; the 35% that went abroad ($600k) is mapped below.
Dollar for dollar, your grants (FY17–25) land where the poverty rate runs at 10%, against an area that typically sits at 11%. 27% of your dollars go to grantees based in above-average-need neighborhoods. Your grants skew toward lower-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
Beyond the US — 35% of all-years giving ($600k)
2 countries, by the recipient’s country on the filing.
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. International giving is mapped by the recipient’s country from the same 990 filings; comparable need data isn’t available at that grain.
Where the work is directed
The same grants, placed two ways — where each recipient sits, and where its stated purpose earmarks the money.
About 9% of The Louis Stewart Foundation Inc’s grant dollars are earmarked, by their stated purpose, for a different county than the recipient’s own address — money that lands at a nonprofit in one place but is meant to do its work in another.
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the foundation’s own 990 grant descriptions.
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 +31% for the ones you funded once.
12 repeat relationships — 9 still active in FY2025, 3 since wound down; 2 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, 98% of grant dollars renewed an existing relationship; $4k 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
- RTRAINFOREST TRUST8× · 2017–2025 · $563k · revenue +100%
- FFFAUNA & FLORA INTERNATIONAL USA INC6× · 2017–2024 · $209k · revenue +654%
- SNSAVING NATURE INC5× · 2021–2025 · $115k · revenue +462%
Funded once
- AFAMERICANS FOR OXFORD INCone grant, 2017 · $8k · revenue +17%
- TFTED FOUNDATION INCgraduatedone grant, 2021 · $5k · revenue +31%
- AMABACO MEDICAL RELIEF FUND INCone grant, 2020 · $5k
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.
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.
To protect and to promote the protection of the ecological integrity and other conservation values of the natural areas of canada through securement of fee title and less than fee interests in land and support of canadian conservation…
Ci works to spotlight and secure the critical benefits that nature provides to humanity.
Wwf's mission is to conserve nature and reduce the most pressing threats to the diversity of life on earth. (continued on schedule o)
Preservation and conservation of natural ecosystems and biodiversity worldwide.
Natura International conserves rainforests and other key natural ecosystems and the endangered species they contain through creation of protected areas in collaboration with local governments and communities in Latin America. In this way…
Preserving and enhancing the habitat of wildlife, such as sandhill cranes, waterfowl, raptors, which habitat expenses are supported by agricultural activities.
Blue investments for nature, inc. (bin) is a nonprofit corporation whose sole member and supported organization is the nature conservancy (tnc). tnc is a longstanding section 501(c)(3) public charity organized and operated for the…
The purpose of rainforest foundation us is to support indigenous peoples and forest communities in their efforts to secure their lands, protect their environment, and uphold their rights.
For reference, the grantee most central to the portfolio’s shape is Fauna & Flora International Usa Inc and the most unlike its peers is Endeavor Health Clinical Operations. 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 23 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 RAINFOREST TRUST ↗
- Who funds FAUNA & FLORA INTERNATIONAL USA INC ↗
- Who funds SAVING NATURE INC ↗
- Who funds CHARITIES AID FOUNDATION AMERICA ↗
- Who funds PAMS FOUNDATION INC ↗
- Who funds CABLE NATURAL HISTORY MUSEUM INC ↗
- Who funds HADLEY INSTITUTE FOR THE BLIND AND VISUALLY IMPAIRED ↗
- Who funds AMERICANS FOR OXFORD INC ↗
- Who funds NORTH SHORE COUNTRY DAY SCHOOL ↗
- Who funds CHAPEL & YORK US FOUNDATION INC ↗
- Who funds TED FOUNDATION INC ↗
- Who funds THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK ↗
- Who funds AMERICAN FRIENDS OF CANADIAN NATURE INC ↗
- Who funds Bahamas National Trust Fund Inc ↗
- Who funds Endeavor Health Clinical Operations ↗
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: National Philanthropic Trust · American Endowment Foundation · Morgan Stanley Global Impact Funding Trust Inc · Vanguard Charitable Endowment Program · 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 The Louis Stewart Foundation Inc 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 The Louis Stewart Foundation Inc?
Find your warmest path to The 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.