· Private foundation
The Overbrook 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 FY2017–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k41 grants · $105k
- $10k–50k39 grants · $914k
- $50k–250k79 grants · $5.6M
- $250k+1 grant · $1.7M
| Recipient | Amount |
|---|---|
| Community Funds Inc | $1,669,590 |
| Environment America Research and Policy Center Inc | $200,000 |
| Mongabay Org Corp | $150,000 |
| NEO Philanthropy | $150,000 |
| The Lawyering Project | $100,515 |
| Brennan Center for Justice | $100,000 |
| Voting Rights Lab | $100,000 |
| Wildlife Conservation Society (WCS) | $100,000 |
| Plastic Solutions Fund | $100,000 |
| Free Election Fund a project of Hopewell Fund | $100,000 |
| Lawyers' Committee for Civil Rights Under Law | $100,000 |
| Billion Oyster Project | $100,000 |
| GreenWave Organization Corp | $100,000 |
| The Heartland Fund | $100,000 |
| Perpetual Use Inc | $100,000 |
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 (FY17–24, $696k) land where the poverty rate runs at 15%, against an area that typically sits at 10%. 98% 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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +56% since the first grant, against +23% for the ones you funded once.
266 repeat relationships — 104 still active in FY2024, 162 since wound down; 41 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, 84% of grant dollars renewed an existing relationship; $1.3M 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
- MOMONGABAY ORG CORP8× · 2017–2024 · $951k · revenue +396%
- WCWildlife Conservation Society8× · 2017–2024 · $831k · revenue +59%
- BPBOREALIS PHILANTHROPY5× · 2017–2021 · $811k · revenue +56%
Funded once
- MVMovement Voter Fundone grant, 2022 · $1.6M
WISCONSIN VOICES INCone grant, 2020 · $251k · revenue -89%
BLUEPRINT NORTH CAROLINAone grant, 2020 · $250k · revenue -69%
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.
To strenghten people's ability to guarantee their individual and collective right to a healthy environment, via the development, implementation, and effective enforcement of national and international law.
Educational & charitable. to provide legal and scientific information to public interest attorneys and scientists in numerous countries.
The union of concerned scientists puts rigorous, independent science into action, developing solutions and advocating for a healthy, safe, and just future.
The open markets institute works to help people relearn how to use competition policy to build stronger democracies, more just and equitable societies, more innovative and sustainable economies, and a more secure and peaceful world.
To drive transformational adaptation to protect communities across the country from higher seas, stronger storms, and more frequent flooding.
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…
Wri is committed to creating change that improves people's lives and ensures the natural world can thrive. (see schedule o)wri's bold vision requires a formula for success we call "count it. change it. scale it.":- count it: our work is…
Environment next supports individuals, nonprofits and businesses around the world on solutions to complex climate issues. we provide leadership, outreach and communication support, grants, and investments to empower leaders and their ideas…
Improving the transparency and scientific integrity of climate solutions through open data and tools.
Common future is a network of pioneering leaders across the u.s. and canada who work deeply within their communities to create alternative approaches to business, philanthropy, and investing. we envision an economy that has transitioned…
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…
Using legal advocacy to make advances in science and technology safer for people and the planet.
For reference, the grantee most central to the portfolio’s shape is National Center for Family Philanthropy Inc and the most unlike its peers is Osa Wildlife Sanctuary Foundation Inc. 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 26 years old; the field is 16. You back the established end — and your money leans older still.
The field is 22% startups (under 5 years old) — 3% of your grantees by number, and just 2% of your money.
The orgs you fund almost never close — 0.9% lost their exemption, against 13% 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.
422 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. 422 of the 549 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
Showing your 200 largest grantees by grant value.
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 PROTEUS FUND INC ↗
- Who funds MONGABAY ORG CORP ↗
- Who funds Wildlife Conservation Society ↗
- Who funds BOREALIS PHILANTHROPY ↗
- Who funds WILLIAM J BRENNAN CENTER FOR JUSTICE INC ↗
- Who funds RAINFOREST ALLIANCE INC ↗
- Who funds DEMOS A NETWORK FOR IDEAS AND ACTION LTD ↗
- Who funds Environmental Defender Law Center ↗
- Who funds NATURAL RESOURCES DEFENSE COUNCIL INC ↗
- Who funds ENVIRONMENTAL INVESTIGATION AGENCY ↗
- Who funds PREGNANCY JUSTICE INC ↗
- Who funds BILLION OYSTER PROJECT INC ↗
- Who funds Groundswell Fund ↗
- Who funds COMING CLEAN INC ↗
- Who funds THE STORY OF STUFF PROJECT ↗
- Who funds Grist Magazine Inc ↗
- Who funds PHILANTHROPIC VENTURES FOUNDATION ↗
- Who funds AMERICAN JEWISH WORLD SERVICE INC ↗
- Who funds LOUISIANA BUCKET BRIGADE ↗
- Who funds FUND FOR GLOBAL HUMAN RIGHTS INC ↗
- Who funds LAMBDA LEGAL DEFENSE & EDUCATION FUND INC ↗
- Who funds ENVIRONMENT AMERICA RESEARCH AND POLICY CENTER INC ↗
- Who funds UPROSE INC ↗
- Who funds Global Alliance for Incinerator Alternatives ↗
- Who funds FLORIDA RISING TOGETHER INC ↗
- Who funds COLORADO ORGANIZATION FOR LATINA OPPORTUNITY AND REPRODUCTIVE RIGHTS ↗
- Who funds BOLD FUTURES NM ↗
- Who funds Transgender Law Center ↗
- Who funds NATIONAL NETWORK OF ABORTION FUNDS INC ↗
- Who funds Rainforest Action Network ↗
- Who funds STAND ↗
- Who funds Forward Together ↗
- Who funds GREENWAVE ORGANIZATION CORP ↗
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: Amalgamated Charitable Foundation Inc · NEO Philanthropy Inc · Wellspring Philanthropic Fund Inc · Proteus Fund Inc · New Venture Fund · The Scherman Foundation Inc · The Ford Foundation · Freedom Together Foundation · Foundation to Promote Open Society · Rockefeller Philanthropy Advisors Inc · Groundswell Fund · Wallace Global Fund II
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 Overbrook 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.
- Ironbound Community Corporation — 100% of income from government
- Root Capital Inc — 9% 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 The Overbrook Foundation?
Find your warmest path to The Overbrook 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.