· Private foundation
Castle Family 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 2025.
Where the money goes
Grants by size, and the largest recipients.
| Recipient | Amount |
|---|---|
| POMFRET SCHOOL | $5,000 |
| Individual grant recipient | $4,645 |
| EASTERN CT SYMPHONY ORCHESTRA | $2,500 |
| LA GRUA CENTER FOUNDATION | $2,100 |
| GRAMPY'S CHARITIES | $2,000 |
| TAFT SCHOOL | $2,000 |
| PRINCETON UNIVERSITY | $1,800 |
| LAWRENCE MEMORIAL HOSPITAL | $1,600 |
| COMMUNITY FOUNDATION OF EASTERN CT | $1,000 |
| OCEAN COMMUNITY YMCA | $1,000 |
| DARTMOUTH COLLEGE | $1,000 |
| MICHAEL J FOX FOUNDATION | $1,000 |
| STONINGTON FREE LIBRARY | $850 |
| STONINGTON CEMETERY ASSN | $550 |
| MYSTIC SEAPORT MUSEUM | $500 |
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 (FY17–25, $18k) land where the poverty rate runs at 8%, against an area that typically sits at 10%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-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.
Grantees it renews have grown median revenue +42% since the first grant, against +21% for those funded once.
33 repeat relationships: 25 still active in FY2025, 8 since wound down; 2 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, 99% of grant dollars renewed an existing relationship; $400 went to new ones.
Where new relationships form · theme of each grantee’s first grant
How this is measured
Backed again, and grew
The Trustees of Princeton University9× · 2017–2025 · $41k · revenue +5%- PSPOMFRET SCHOOL INCORPORATED9× · 2017–2025 · $35k · revenue +29%
- TTTHE TAFT SCHOOL CORPORATION9× · 2017–2025 · $18k · revenue +135%
Funded once
- FIFIDELITY INVESTMENTSone grant, 2017 · $103k
- RMRONALD MCDONALD HOUSE CHARITIES FLone grant, 2024 · $2k
- MAMYSTIC AQUARIUMone grant, 2024 · $1k
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 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…
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
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.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
(see schedule o)the stony brook school is an independent college preparatory school (grades 7-12) that exists to challenge young men and women to know jesus christ as lord, to love others as themselves, and to grow in knowledge and skill,…
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
How this is measured
21 grantees tracked through their own filings, 2017–2026.
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 2026, not grant rows in a single year, so this will not match the grant count on the cover. 21 of the 42 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 The Trustees of Princeton University ↗
- Who funds POMFRET SCHOOL INCORPORATED ↗
- Who funds THE TAFT SCHOOL CORPORATION ↗
- Who funds LAWRENCE MEMORIAL HOSPITAL INC ↗
- Who funds GRAMPY'S CHARITIES JAMES JONATHA WILLIAM CASTLE TTEES ↗
- Who funds STONINGTON COMMUNITY CENTER INC ↗
- Who funds THE STONINGTON FREE LIBRARY INC ↗
- Who funds Trustees of Dartmouth College ↗
- Who funds OCEAN COMMUNITY YMCA ↗
- Who funds PINE POINT SCHOOL INC ↗
- Who funds STONINGTON CEMETERY ASSOCIATION INC ↗
- Who funds THE MICHAEL J FOX FOUNDATION FOR PARKINSON'S RESEARCH ↗
- Who funds Stonington Village Improvement Assoc Inc ↗
- Who funds STONINGTON HISTORICAL SOCIETY INC ↗
- Who funds MYSTIC SEAPORT MUSEUM INC ↗
- Who funds BOSTON YOUTH SYMPHONY ORCHESTRAS INC ↗
- Who funds THE TRUST FOR PUBLIC LAND ↗
- Who funds HAITIAN HEALTH FOUNDATION ↗
- Who funds ALWAYS HOME INC ↗
- Who funds Snow Leopard Conservancy ↗
- Who funds WIKIMEDIA FOUNDATION INC ↗
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 Pfizer Foundation Inc · Doogood Foundation Inc · Royce Family Fund Inc · Chelsea Groton Foundation · Dxn Foundation · Tua Benson P Blake Char Trust · The Michael & Dudley Delbalso Charitable Trust · Fromson Foundation Inc · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Ibm International Foundation · National Philanthropic Trust · Morgan Stanley Global Impact Funding Trust Inc
How this is measured
How much its grantees rely on government
Each dot is one organization Castle Family Foundation funds: left to right is the share of its income from government, bottom to top the share from Castle Family Foundation. Bigger dots raise more.
- The Trustees of Princeton University: 11% of income from government
- Mystic Seaport Museum Inc: 5% of income from government
- The Stonington Free Library Inc: 2% of income from government
- Stonington Village Improvement Assoc Inc: 2% of income from government
- Boston Youth Symphony Orchestras Inc: 1% of income from government
- Lawrence Memorial Hospital Inc: 0% of income from government
How this is measured
Play a game based on Castle Family’s filings →