· Private foundation
Stems Macarthur Foundation Inc
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 FY2017–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k7 grants · $15k
- $10k–50k1 grant · $10k
| Recipient | Amount |
|---|---|
| NATIONAL MUSEUM OF WOMEN IN ARTS | $10,000 |
| UNICEF USA | $5,000 |
| HABITAT FOR HUMANITY | $5,000 |
| INST FOR SUSTAINABLE COMMUNITIES | $1,000 |
| AMERICAN INDIAN COLLEGE FUND | $1,000 |
| Individual grant recipient | $1,000 |
| AMERICAN RED CROSS | $1,000 |
| UC BERKELY 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 human-services grants (FY18–18, $1k) land where the poverty rate runs at 17%, against an area that typically sits at 10%. 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.
15 repeat relationships — 6 still active in FY2024, 9 since wound down; 2 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, 92% of grant dollars renewed an existing relationship; $2k 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
United States Association for UNHCR4× · 2018–2021 · $27k · revenue +39%
UNITED STATES FUND FOR UNICEF3× · 2018–2024 · $25k · revenue +47%- HFHabitat for Humanity2× · 2023–2024 · $15k · revenue +30%
Funded once
- NANATIVE AMERICAN RIGHTS FUND INCgraduatedone grant, 2018 · $5k · revenue +86%
- PFPets for Vets Incgraduatedone grant, 2017 · $5k · revenue +67%
- IGIndividual grant recipientone grant, 2017 · $3k
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.
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.
Ci works to spotlight and secure the critical benefits that nature provides to humanity.
Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.
To enhance both the global competitiveness of u.s. business and the u.s. quality of life by promoting and facilitating voluntary consensus standards and conformity assessment systems, and safeguarding their integrity.
Nia tero works alongside indigenous peoples to secure their guardianship of vital ecosystems. indigenous peoples are guardians of earth.(see schedule o)
We safeguard the earth: its people, its plants and animals, and (see schedule o) the natural systems on which all life depends. we work to restore the integrity of the elements that sustain life - air, land, and water - to defend…
Organization mission the observer research foundation america orf america is an independent, non-partisan, and nonprofit organization in washington dc dedicated to addressing policy challenges facing the united states, india, and their…
Friends of the earth strives for a more healthy and just world by defendng the environment and human health while advancing social and economic justice by conducting research and education, transforming the economy so it protects the…
Wmf is the leading independent organization devoted to safeguarding the world's most treasured places to enrich people's lives and build mutual understanding across cultures and communities. the organization is headquartered in new york…
Nrgi envisions a world where natural resources enable fair, prosperous and sustainable societies, instead of undermining them. nrgi exists because decisions about how natural resources are governed determine the well-being of people in…
Actionaid is an international network building a just, equitable, and sustainable world in solidarity with communities on the frontlines of poverty and injustice. actionaid usa is the u.s. branch of actionaid international, which works in…
To lead and coordinate the global initiative to address and prevent criminalization, violence, and impunity against indigenous peoples towards strengthening their collectives, solidarity, and actions.
For reference, the grantee most central to the portfolio’s shape is National Park Foundation and the most unlike its peers is The National Museum of Women in the Arts. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
Your grantees are a median of 36 years old; the field is 18. You back the established end — and your money leans older still.
The field is 20% startups (under 5 years old) — 0% of your grantees by number, and just 0% 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.
21 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. 21 of the 38 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 THE NATIONAL MUSEUM OF WOMEN IN THE ARTS ↗
- Who funds United States Association for UNHCR ↗
- Who funds UNITED STATES FUND FOR UNICEF ↗
- Who funds Habitat for Humanity ↗
- Who funds DEMOCRACY NOW PRODUCTIONS INC ↗
- Who funds HONOR THE EARTH ↗
- Who funds PRO PUBLICA INC ↗
- Who funds INSTITUTE FOR SUSTAINABLE COMMUNITIES ↗
- Who funds Electronic Frontier Foundation Inc ↗
- Who funds NATIVE AMERICAN RIGHTS FUND INC ↗
- Who funds CORPORATION OF THE FINE ARTS MUSEUMS ↗
- Who funds Pets for Vets Inc ↗
- Who funds AMERICAN INDIAN COLLEGE FUND ↗
- Who funds NATIONAL WOMEN'S HISTORY MUSEUM ↗
- Who funds Veterans For Peace Inc ↗
- Who funds Ancestral Knowledge Inc ↗
- Who funds MEDECINS SANS FRONTIERES USA INC ↗
- Who funds American National Red Cross & Its Constituent Chapters and Branches ↗
- Who funds EPISCOPAL RELIEF AND DEVELOPMENT ↗
- Who funds WORLD WILDLIFE FUND INC ↗
- Who funds NATIONAL PARK FOUNDATION ↗
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: 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 Stems Macarthur 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.
- Institute for Sustainable Communities — 100% 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 Stems Macarthur Foundation Inc?
Find your warmest path to Stems Macarthur 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.