· Private foundation
General William Mayer Foundation
Its FY2025 filing reports that it accepted unsolicited grant applications.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2018–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k30 grants · $32k
- $10k–50k6 grants · $64k
| Recipient | Amount |
|---|---|
| Robert C Parker School | $13,500 |
| Mass Audubon Drumlin Farm Wildlife | $10,750 |
| Justice Dance Performance Project | $10,000 |
| Westerly Land Trust | $10,000 |
| Access Opportunity | $10,000 |
| Stonington Community Rowing Center | $10,000 |
| New England College | $5,000 |
| East Woods School | $3,450 |
| Pine Point School | $2,900 |
| Deerfield Academy | $2,350 |
| Central City Hospitality House | $2,000 |
| The Master School | $1,500 |
| Colgate University | $1,450 |
| The Heimerdinger Foundation | $1,200 |
| Bike East Bay | $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 (FY20–25, $53k) land where the poverty rate runs at 12%, against an area that typically sits at 11%. 81% 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 +38% since the first grant, against -1% for the ones you funded once.
47 repeat relationships — 32 still active in FY2025, 15 since wound down; 3 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, 87% of grant dollars renewed an existing relationship; $12k 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
ROBERT C PARKER SCHOOL8× · 2018–2025 · $95k · revenue +79%- CFCHILL FOUNDATION6× · 2018–2024 · $60k · revenue +57%
THE WESTERLY LAND TRUST6× · 2019–2025 · $60k · revenue +71%
Funded once
- DPDENISON PEQUOTSEPOS NATURE CENTERone grant, 2021 · $15k · revenue -1%
- SFSafe Futures Incone grant, 2024 · $10k · revenue +2%
- TRTENNESSEE RESETTLEMENT AIDone grant, 2023 · $8k · revenue -28%
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.
Bates is a college of the liberal arts and sciences, and is a coeducational, nonsectarian, residential college with special commitments to academic rigor, and to assuring in all of its efforts the dignity of each individual, and access to…
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…
Wheaton college provides a transformative liberal arts education, combining theory and practice, for intellectually curious students within a collaborative and vibrant extended community and network that values and strives to create an…
Mitchell college educates students through a highly individualized educational approach that brings forward each student's potential, reveals their strengths, and fosters personal growth.
Darrow school is dedicated to serving students with diverse backgrounds and abilities, building on each student's talents and interests to inspire enduring confidence for success in college and life. this mission is accomplished through…
New england law/boston dedicates itself to preparing students to be successful lawyers and leaders in the public and private sectors through integrated practical, theoretical and ethical education of the highest caliber and to contributing…
The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.
Suffield Academy is a coeducational independent secondary school serving a diverse student body of day and boarding students from across the United States and from many foreign counties. The school is grounded in a tradition of academic…
Wentworth institute of technology is a nationally recognized private coeducational and residential university of higher education with a mission to empower, inspire and innovate through experiential learning with a core purpose of career…
Bb&n, an all gender day school in cambridge, massachusetts, was established in 1974 by the merger of two independent schools, the buckingham school and the browne & nichols school, founded respectively in 1889 and 1883. located on multiple…
We empower young people to explore and grow their unique intellectual, ethical, and creative capabilities, and to treasure diversity and growth in others.
For reference, the grantee most central to the portfolio’s shape is Kingswood Oxford School Inc and the most unlike its peers is Wall Street Bound 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 47 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) — 4% of your grantees by number, and just 3% of your money.
The orgs you fund almost never close — 0.0% 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.
49 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. 49 of the 60 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 ROBERT C PARKER SCHOOL ↗
- Who funds CHILL FOUNDATION ↗
- Who funds THE WESTERLY LAND TRUST ↗
- Who funds New England College ↗
- Who funds ACCESS OPPORTUNITY ↗
- Who funds PINE POINT SCHOOL INC ↗
- Who funds EAST WOODS SCHOOL INC ↗
- Who funds The Heimerdinger Foundation Inc ↗
- Who funds JUSTICE DANCE PERFORMANCE PROJECT INC ↗
- Who funds TRUSTEES OF DEERFIELD ACADEMY ↗
- Who funds ROCKING THE BOAT INC ↗
- Who funds DENISON PEQUOTSEPOS NATURE CENTER ↗
- Who funds MASTERS SCHOOL ↗
- Who funds MAYHEW ↗
- Who funds COLGATE UNIVERSITY ↗
- Who funds STONINGTON COMMUNITY ROWING INC ↗
- Who funds Safe Futures Inc ↗
- Who funds CYNISCA CYCLING INC ↗
- Who funds TENNESSEE RESETTLEMENT AID ↗
- Who funds TRUSTEES OF WESTMINSTER SCHOOL INC ↗
- Who funds ST LAWRENCE UNIVERSITY ↗
- Who funds BROWN UNIVERSITY ↗
- Who funds Northwestern University ↗
- Who funds KINGSWOOD OXFORD SCHOOL INC ↗
- Who funds East Bay Bicycle Coalition DBA Bike East Bay ↗
- Who funds DANA HALL SCHOOL ↗
- Who funds NEW DOOR VENTURES FKA GOLDEN GATE COMMUNITY INC ↗
- Who funds SUDBURY COMMUNITY FOOD PANTRY ↗
- Who funds BOYS AND GIRLS CLUB OF BURLINGTON INC ↗
- Who funds American Museum of Natural History ↗
- Who funds BOSTON RESCUE MISSION INC ↗
- Who funds San Francisco Bicycle Coalition ↗
- Who funds THE BERKSHIRE SCHOOL INC ↗
- Who funds The President and Trustees of Colby College ↗
- Who funds Electronic Frontier Foundation Inc ↗
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: Kitchings Family Foundation · Ge Aerospace Foundation · Boston Foundation Inc · Joe C Davis Foundation · The Community Foundation of Eastern Connecticut Inc · Fidelity Foundation · Ibm International Foundation · The Community Foundation of Middle Tennessee Inc · The Pfizer Foundation Inc · Citizens Charitable Foundation · National Philanthropic Trust · Eastern Bank 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 General William Mayer 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, a single department, or state — and drag the year to watch it move.
- Boys and Girls Club of Burlington Inc — 16% of income from government
- Safe Futures Inc — 15% of income from government
- Sudbury Valley Trustees Inc — 11% of income from government
- Justice Dance Performance Project Inc — 2% of income from government
- Lake Champlain Land Trust Inc — 1% of income from government
- Chill Foundation — 0% of income from government
- Denison Pequotsepos Nature Center — 0% of income from government
- Kingswood Oxford School Inc — 0% 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 General William Mayer Foundation?
Find your warmest path to General William Mayer 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.