· Private foundation
The William Zimmerman Foundation
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 it funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.
Where the money goes
Grants by size, and the largest recipients.
By grant size · FY2025
- $10k–50k3 grants · $85k
- $50k–250k6 grants · $545k
| Recipient | Amount |
|---|---|
| CENTER FOR FOOD SAFETY | $145,000 |
| BOYS AND GIRLS CLUBS OF OAKLAND | $115,000 |
| ASPIRE PUBLIC SCHOOLS FOUNDATION | $92,000 |
| KIPP PUBLIC SCHOOLS NORTH CALIFORNIA | $83,000 |
| NATIONAL ORGANIC COALITION INC | $60,000 |
| AFRICAN MISSION HEALTHCARE FOUNDATION | $50,000 |
| DIRECT RELIEF | $35,000 |
| INTERNATIONAL RESCUE COMMITTEE | $25,000 |
| STANFORD HEALTH CARE | $25,000 |
Does the money reach high-need areas?
Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.
Its human-services grants (FY17–18, $200k) land where the poverty rate runs at 10%, against an area that typically sits at 9%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.
How this is measured
Which US states its grants reach
How this is measured
Who it funds again
Organizations funded in more than one year, against those funded once.
19 repeat relationships: 9 still active in FY2025, 10 since wound down.
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, 100% of grant dollars renewed an existing relationship; $0 went to new ones.
Where new relationships form · theme of each grantee’s first grant
How this is measured
Backed again, and grew
- BGBOYS & GIRLS CLUBS OF OAKLAND7× · 2019–2025 · $665k · revenue +78%
- KBKIPP BAY AREA SCHOOLS8× · 2017–2025 · $613k · revenue +126%
- IRInternational Rescue Committee INC7× · 2018–2025 · $265k · revenue +80%
Funded once
- KBKIPP Bay Area Public Schoolsone grant, 2019 · $100k
- NONATIONAL ORGANIC COALITIONone grant, 2022 · $50k
- MCMERCY CORPS PUERTO RICO RELIEF FUNDone grant, 2017 · $20k
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.
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.
The mission of the global alliance for improved nutrition (gain) is to improve the consumption of healthier diets for all, especially the most vulnerable, by improving the availability, affordability, desirability, and sustainability of…
RA works at the intersection of business, agriculture & forests to improve lives & protect nature by transforming how land is used, production of goods & consumer choices.
Partners In Health (PIH) is a non-profit, global health organization that fights social injustice by bringing the benefits of modern medical science first and foremost to the most vulnerable communities worldwide. In Haiti, Malawi, Rwanda,…
RA works at the intersection of business, agriculture & forests to improve lives & protect nature by transforming how land is used, production of goods & consumer choices.
Ci works to spotlight and secure the critical benefits that nature provides to humanity.
Alphamundi foundation, inc. (the foundation) is a washington, dc based non-profit with a mission to strengthen the long-term commercial viability of smes in africa and latin america to drive economic transformation. this leads to more jobs…
The hunger project is working to create a world without hunger through women-centered, holistic development strategies that address the root causes of hunger and poverty. in 2025, it reached nearly 12.7 million people in over 10,000…
(msh) saves lives and improves the health of the world's poorest (see schedule o) and most vulnerable people by closing the gap between knowledge and action in public health.
To engage and catalyze global seafood supply chains in rebuilding depleted fish stocks and reducing the environmental impacts of fishing and fish farming.
Deliver ecological stability and long-term protection of large-scale wilderness by supporting and empowering local communities.
To replace poverty with prosperity by implementing donor-funded projects that provide global humanitarian aid to communities and individuals in developing countries through in-kind, financial and technical assistance.
Iyf is a global ngo that prepares young people to be healthy, productive and engaged citizens.
How this is measured
23 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. 23 of the 32 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.
Where the money sits, by cause and then by grantee
Each grantee by its size and the funder’s share of it; top left is load-bearing
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 Center for Food Safety ↗
- Who funds BOYS & GIRLS CLUBS OF OAKLAND ↗
- Who funds KIPP BAY AREA SCHOOLS ↗
- Who funds ASPIRE PUBLIC SCHOOLS FOUNDATION ↗
- Who funds International Rescue Committee INC ↗
- Who funds African Mission Healthcare Foundation ↗
- Who funds RURAL ADVANCEMENT FOUNDATION INTERNATION ↗
- Who funds MAMA HOPE INC ↗
- Who funds National Organic Coalition Inc ↗
- Who funds Earth Island Institute Inc ↗
- Who funds STANFORD HEALTH CARE ↗
- Who funds THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY ↗
- Who funds READING PARTNERS ↗
- Who funds Organizacion en California de Lideres Campesinas Inc ↗
- Who funds MARCY LAB INC ↗
- Who funds DIRECT RELIEF ↗
- Who funds NORTH VALLEY COMMUNITY FOUNDATION ↗
- Who funds MAUI FOOD BANK INC ↗
- Who funds ZIMMERMAN FAMILY FOUNDATION ↗
- Who funds KAKENYA CENTER FOR EXCELLENCE ↗
- Who funds THE MALALA FUND ↗
- Who funds DOCTORS TO THE WORLD ↗
- Who funds GROW AHEAD FOUNDATION ↗
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.
Open a dossier: The Chicago Community Trust · Patagoniaorg · Marin Community Foundation · Impactassetsinc · Tides Foundation · Silicon Valley Community Foundation · Vanguard Charitable Endowment Program · Morgan Stanley Global Impact Funding Trust Inc · National Philanthropic Trust · Raymond James Charitable Endowment Fund · American Endowment Foundation · Donor Advised Charitable Giving Inc
How this is measured
How much its grantees rely on government
Each dot is one organization The William Zimmerman Foundation funds: left to right is the share of its income from government, bottom to top the share from The William Zimmerman Foundation. Bigger dots raise more.
How this is measured
Warm introductions · Powered by PlinthPlus
How do I get to The William Zimmerman Foundation?
Find your warmest path to The William Zimmerman 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.
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