· Community foundation
Cromwell Harbor Supporting Foundation Inc
To operate exclusively for educational, charitable and scientific purposes within the meaning of section 501(c)(3) of the internal revenue code as a section 509(a)(3) supporting organization of the boston foundation.
What you funded, over time
By grantee IRS cause code (NTEE).
A cause breakdown isn’t shown here: 57% of CROMWELL HARBOR SUPPORTING FOUNDATION INC’s grantee dollars fall outside its nine largest cause areas, whether because the recipient carries no IRS cause code or because its cause sits in the long tail. A chart would be mostly one residual band and misrepresent the portfolio.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- $10k–50k9 grants · $155k
- $50k–250k8 grants · $852k
- $250k+1 grant · $420k
| Recipient | Amount |
|---|---|
| COLLEGE OF THE ATLANTIC | $420,000 |
| MASSACHUSETTS GENERAL HOSPITAL | $200,000 |
| VITAL CXNS INC | $176,667 |
| NORTH BENNET STREET SCHOOL | $125,000 |
| LAWRENCE CATHOLIC ACADEMY | $100,000 |
| AUTHOR'S GUILD FOUNDATION | $100,000 |
| PICKLES GROUP INC | $50,000 |
| JESUP MEMORIAL LIBRARY | $50,000 |
| OUTER COAST | $50,000 |
| MOUNT DESERT LAND AND GARDEN PRESERVE | $25,000 |
| WGBH EDUCATIONAL FOUNDATION | $25,000 |
| SOCIETY FOR THE PRESERVATION OF NEW ENGLAND ANTIQUITIES | $25,000 |
| CHILDREN'S TUMOR FOUNDATION | $25,000 |
| FRIENDS OF ACADIA | $15,000 |
| KIDS ALIVE INTERNATIONAL | $10,000 |
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.
Dollar for dollar, your grants (FY22–25) land where the poverty rate runs at 13%, against an area that typically sits at 10%. 95% of your 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.
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 +20% since the first grant, against +18% for the ones you funded once.
14 repeat relationships — 12 still active in FY2025, 2 since wound down; 5 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, 84% of grant dollars renewed an existing relationship; $220k 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
COLLEGE OF THE ATLANTIC3× · 2022–2025 · $1.7M · revenue +20%- VCVITAL CXNS INC3× · 2023–2025 · $530k · revenue +38% · 28% of their budget
- TATHE AUTHORS GUILD FOUNDATION INC4× · 2022–2025 · $300k · revenue +60%
Funded once
GROTON SCHOOLone grant, 2022 · $25k · revenue +8%
MUSEUM OF FINE ARTSone grant, 2024 · $6k · revenue +18%
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 bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
Dartmouth College educates the most promising students and prepares them for a lifetime of learning and of responsible leadership, through a faculty dedicated to teaching and the creation of knowledge.
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 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…
The Marine Biological Laboratory (MBL) is a world-renowned center for biological discovery and training that is notably affiliated with more than 60 Nobel Prize winners. Research is conducted by full-time faculty as well as hundreds of the…
Northeast college of health sciences (the college) is committed to academic excellence, leadership, and professional best practices in the health sciences.
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.
To enhance, every day, the health of our patients, our families and our communities. We do that through a range of health care services for people of all ages, in a variety of care settings.
To preserve the unique character and natural resources of harvard.
to provide a rigorous and transformative liberal arts education that prepares students to become thoughtful, engaged citizens.
The organization's primary exempt purpose is to provide access to and conduct activities in furtherance of higher education.
Education and Research
For reference, the grantee most central to the portfolio’s shape is Society for the Preservation of New Engl and the most unlike its peers is Wgbh Educational Foundation. 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 42 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) — 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 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.
20 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. 20 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 COLLEGE OF THE ATLANTIC ↗
- Who funds VITAL CXNS INC ↗
- Who funds Boston Foundation Inc ↗
- Who funds JESUP MEMORIAL LIBRARY ↗
- Who funds THE AUTHORS GUILD FOUNDATION INC ↗
- Who funds North Bennet Street School ↗
- Who funds Mount Desert Land and Garden Preserve ↗
- Who funds SOCIETY FOR THE PRESERVATION OF NEW ENGL ↗
- Who funds WGBH Educational Foundation ↗
- Who funds President and Fellows of Harvard College ↗
- Who funds CHILDREN'S TUMOR FOUNDATION ↗
- Who funds Pickles Group Inc ↗
- Who funds OUTER COAST ↗
- Who funds Friends of Acadia ↗
- Who funds Kids Alive International Inc ↗
- Who funds GROTON SCHOOL ↗
- Who funds HEALTHY ACADIA ↗
- Who funds MIRACLEFEET ↗
- Who funds MOUNT DESERT ISLAND HOSPITAL ↗
- Who funds MUSEUM OF FINE ARTS ↗
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: Cromwell Harbor Foundation Inc · Florence V Burden Foundation · Maine Community Foundation Inc · Vanguard Charitable Endowment Program · National Philanthropic Trust · Raymond James Charitable Endowment Fund · American Endowment Foundation · Morgan Stanley Global Impact Funding Trust Inc · The Bank of America Charitable 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 Cromwell Harbor Supporting 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, a single department, or state — and drag the year to watch it move.
- President and Fellows of Harvard College — 7% of income from government
- Society for the Preservation of New Engl — 2% of income from government
- Wgbh Educational Foundation — 1% of income from government
- Museum of Fine Arts — 0% of income from government
- Boston Foundation 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 Cromwell Harbor Supporting Foundation Inc?
Find your warmest path to Cromwell Harbor Supporting 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.